Best way to get to ~400hp, 454 tbi. Anyone build one? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cochino12 · 08-09-2011, 09:06 PM

Id like to get some more power out of my dually and I'm not exactly sure what route to take. Of course I dont want to spend a ton money and I do would like to keep it as reliable as possible. I might be selling my 2wd K5 to help fund upgrades but dont want to spend it all on the motor.

Been doing some reading on tbichips.com and it sounds like its pretty expensive to do the fuel pump, throttle body, heads, chip, cam... Seems like it would be a whole lot cheaper to ditch the tbi and slap a cam, intake and some mild head work to get where I need to be. Anyone have experience with the 454tbi? Yes, I realize the truck has peanut port heads but it doesnt seem like the 400hp mark should be to hard to achieve, even with these boat anchor heads

critict1gc · 08-09-2011, 09:43 PM

you mentioned 3 things cheap reliable and lot of power pick 2

cochino12 · 08-09-2011, 09:51 PM

Quote:

Originally Posted by critict1gc

you mentioned 3 things cheap reliable and lot of power pick 2

I said "cheaper" I dont mind spending some money but I dont want to spend more than I need to just to keep the tbi. I didn think 400hp was considered a lot of power for a bbc?

BigBlocksRule · 08-10-2011, 07:13 AM

Head over to 454SS.com, they have more big block TBI experience than anyone...

Greenlee · 08-10-2011, 08:57 AM

Take away TBI and you hurt reliability in my opinion.
Posted via Mobile Device

**N2TRUX** · 08-10-2011, 10:38 AM

Talk to Scoti about this. He just spent some time in researching his motor build. He can give you a quick over view.

If it were me, I would be looking at a 6.0 swap.

SCOTI · 08-10-2011, 08:35 PM

Everything I read/found said if it's within your budget & for a cruiser, go 6.0/6.2 LS power. If it's still used as a truck & expected to tote a loaded trailer, the big-block grunt won't be matched by the LS (now, a turbo diesel would be another alternative....).

Not wanting to get into the electronics of the LS swap, I did the tried & true basics focusing on air-in, air-out; w/minimal restrictions in between.

Peanut port heads work fine for the rpm's a CC dually will see (there are always exceptions). I looked into closed-chamber heads to help compression further but there was too much conflicting info so I just went w/the PP's.

Get a better intake manifold if still using a stock iron unit. Get a RV/towing cam (something geared to make torque down low vs power @ the top). Free flowing exhaust w/some 1 3/4" headers & 2.5" minimum exhaust tubing. I cheated a little on mine by doing flat-tops w/no dish since it had to be gone through (every little bit helps IMO).

The TBI's are around 670cfm & said to work fine up to ~400hp (350 would be realistic) but would likely need the bump in fuel pressure to get it done. The 454ss forum did have some tips on fuel pump alternatives to keeps costs down so it's worth looking into.

Those are the details scribbled on my notepad....

gmc454crew · 03-18-2012, 01:23 AM

Quote:

Originally Posted by SCOTI

...

Get a better intake manifold if still using a stock iron unit. Get a RV/towing cam (something geared to make torque down low vs power @ the top). Free flowing exhaust w/some 1 3/4" headers & 2.5" minimum exhaust tubing. I cheated a little on mine by doing flat-tops w/no dish since it had to be gone through (every little bit helps IMO).

The TBI's are around 670cfm & said to work fine up to ~400hp (350 would be realistic) but would likely need the bump in fuel pressure to get it done. The 454ss forum did have some tips on fuel pump alternatives to keeps costs down so it's worth looking into.

Those are the details scribbled on my notepad....

Were you saying to do this for his 454 or the LS you recommended he get?

I have a 454 in a 1999 GMC 3500. It tows my trailer, but "sounds" like it is struggling during take off and going up slight inclines. I would like to do something to make it a stronger pull. Is there something(s) under 1k (parts) that I could do? Would any of those suggestions help me get past the 10 mpg?

Thanks.

KQQL IT · 03-18-2012, 01:44 AM

I did a generic hypertec tuner on my 99 old body 7.4 . Made a different truck out of it. Actually does something when i step on it.
Posted via Mobile Device

SCOTI · 03-18-2012, 12:19 PM

Quote:

Originally Posted by gmc454crew

Were you saying to do this for his 454 or the LS you recommended he get?

I have a 454 in a 1999 GMC 3500. It tows my trailer, but "sounds" like it is struggling during take off and going up slight inclines. I would like to do something to make it a stronger pull. Is there something(s) under 1k (parts) that I could do? Would any of those suggestions help me get past the 10 mpg?

Thanks.

This was a recommendation for the 7.4L big-block.

From the info I searched out on the internet, the 6.0/6.2 swap would be worth doing on something driven alot. But, if you still need the big grunt of torque, the bbc still outperformed the smaller LS motor for towing heavy loads.

I won't be pulling 'heavy' loads but felt that w/minimal investment I could wake up the current drivetrain. I haven't started it up yet but I'm getting closer. The exhaust is hung through the mufflers so now I can fire it off once I get all the little stuff reconnected to the motor.

gmc454crew · 03-18-2012, 06:03 PM

Thanks for the input. Any specific recommendations for the intake manifold? Also, due to a problem I had with a 5.3 I was reading up on lifters and rockers. I read something about changing to a "roller ball" rocker which would perform better than stock and also cooler. Heard anything about that?

Thanks again.

SCOTI · 03-18-2012, 11:11 PM

Quote:

Originally Posted by gmc454crew

Thanks for the input. Any specific recommendations for the intake manifold? Also, due to a problem I had with a 5.3 I was reading up on lifters and rockers. I read something about changing to a "roller ball" rocker which would perform better than stock and also cooler. Heard anything about that?

Thanks again.

We're still talking big blocks right?

I've always had good experiences w/Edelbrock intakes so that's what I went with for mine. I knew about their TBI-bbc intake & really didn't look much beyond though.

I'm also assuming you were describing 'roller' rockers above. They utilize needle bearings @ the tips which yields less friction. Less friction = less heat & wear. They're better vs. stock stamped standard rockers for sure. Even better than just the rockers would be to upgrade to a hydraulic roller cam kit. I would bet Comp Cams, Lunati, Melling, Edelbrock, or other major manufacturers offer a few choices for retrofit hyd roller cams for computer controlled TBI applications (search 454ss cams). More work vs just swapping rockers, but more performance too.

gmc454crew · 03-19-2012, 01:34 AM

Thanks a lot guys. You've got me really excited about opening this up. My work has primarily been outside the engine, and I am looking forward to this. I will keep you posted.

rfmaster · 03-19-2012, 03:29 AM

To get 400 HP out 454 TBI you'll need to consider the following changes:

1) Stock TB with 2" bores can provide 625 CFM, but stock injectors will limit amount of fuel needed to support 400 HP. Increasing fuel pressure is one possible option, but this approach will require that you run VRFPR - Aeromotive 13301. This unit will adjust fuel pressure from 17 PSI at idle (and increase from stock 13 PSI) to 25 PSI at WOT where extra fuel is needed to make the 400 HPs. Above assumptions are based on stock BBC TB with a pair of 80 lb-HR injectors (rated at 13PSI). There are plenty of alternatives to stock TB and they should be carefully considered.

2) EBL modified ECM (from dynamic EFI). This is a Swiss knife for tuning as you will needed it to achieve your HP goal. Chips are better left to history books (1990's are over). You'll be doing a lot of changes (Also TunerPro - free ware version is available) to fuel and SA tables.

3) Wide band O2 (WBO) - Zeitronix, Innovate, others. You need WBO to accurately dial in fuel mixture during WOT and elsewhere.

4) High volume - pressure fuel pump (FP). Either TPI or Vortec in tank FP should work and support 400HP target.

5) Previously mentioned, but worth noting - heads. Peanut heads are great for low RPM torque, but will keep high RPM HP potential down. A decent pair of AL aftermarket heads will provide additional HP. You do not need to go crazy high compression with today's gas 9.2:1 should be decent compromise. Make sure to calculate CR before purchasing heads.

6) Camshaft - keep in mind the big rat needs to breath, but keep duration at 0.050 reasonable and LSA above 112 deg to keep idle tuning headaches to minimum. With good heads and cam you can hit 400 HP well below 5000 RPM.

7) Exhaust system - true dual with 2-1/2 should do the trick. Quality built full length headers should be installed as cast iron manifolds choke engine high RPM breathing.

8) Heated NBO - a must with headers.

9) Yes, there will be a learning curve.

//RF

jimbonice · 03-19-2012, 02:18 PM

Seems like it would be a whole lot cheaper to ditch the tbi and slap a cam, intake and some mild head work to get where I need to be.

Add headers and a bump in compression from the stock 8-1 to 9-1 and you're there. Throw a quadrajet on top to keep some semblance of part throttle economy and you've got a pretty cheap, powerful and reliable motor.

355bullet · 03-19-2012, 03:49 PM

Have you looked into the new efi from MSD?
Its called the atomic
http://www.atomicefi.com/

puppy · 03-19-2012, 04:32 PM

Quote:

Originally Posted by 355bullet

Have you looked into the new efi from MSD?
Its called the atomic
http://www.atomicefi.com/

I'm waiting for some reviews on this unit myself.

I am in the same delima as the OP of this thread with my 88 crew cab. I am debating send my TBI off to RV Morse machine. He says he can get 700 CFM out of a big block TBI. This will leave a little power on the table from the 750 Holley I am currently running on this engine, but hopefully gain a little economy and driveability.

355bullet · 03-19-2012, 04:41 PM

runs great, i have one installed on my step side.

here is one
http://www.atomicefi.com/forum.aspx?g=posts&t=16551

AntiGov · 03-19-2012, 04:55 PM

watchin closely....same deal 88 crew 454 tbi, lots of good ideas on here, im in the middle of paint and dwr to srw conversion so havent touched anthing under hood yet, was thinking of short term tune ,mid 90's intake, spacer, headers, duals.... then save for long term swap to zz454, 454HO, or 502.........but this thread got me thinking 300hp to 400hp tbi might be great alternative....love this site....

jimbonice · 03-19-2012, 10:22 PM

Here's a link to a number of budget 454 peanut port builds. Some impressive numbers.
http://www.454ss.com/cgi-bin/forum/Y...num=1283147176

*JCampbell* · 08-08-2012, 11:22 PM

Any progress?

INSIDIOUS '86 · 08-09-2012, 01:34 AM

Peanut port heads are fine. Look up demon engines 454 on google. Pulling 400hp out of a 454 is as easy as walking out and getting the paper. Get a bigger cam some headers and a mpfi injection system that will give the airflow and fuel demands you need. As I recall edelbrock makes a kit for this. Of coarse carbureted is the easiest way to go but to others somehow "unreliable". So you will have to warm it up tune it and deal with a little less mpg but a good enough carb tuner can make it to where there is no diff. And a proper setup electric choke will solve any cold start issues
Posted via Mobile Device

JAMESCHURCH13 · 01-02-2013, 07:55 PM

Did anyone finish this? I just bought an 87 quad cab dually with a 454TBI motor and wanted to go with a fast EFI unit... Until I saw this. I have a couple quadrajets I could get rebuilt and I have a nice intake to replace the stock TBI set up. Now I'm thinking I should stick it out with the rats nest of spliced wires the previous owner left me with. I wanna use my Long Tube headers and Torquer intake. Can I get rid of all my emissions crap and still use my stock TBI by just adding the O2 sensor to my headers? Thanks.

school boy · 01-02-2013, 08:26 PM

take this into consideration,
http://bankspower.com/products/show/128/67
the cams in these motors are small, i beleive in the .430 lift range

Ziegelsteinfaust · 01-02-2013, 09:06 PM

I would try the basic bolt-ons, and take a look back when your done.

Get the TBI bowl it flows air into the tbi better, headers, exhaust, chip or tuner, electric fans if you like. I don't know how well do when towing.

A friend of mine from work just did the above on a 130K 4.3 in a 1992 extended cab, and it made a world of difference. It now almost feels like he has a good running 305 in there.

So it should due pretty well for you in your big truck, and if it doesn't produce as much as you want. Your better off for the next step in the build.

The only thing I would of done different would of been to add roller rockers.

08-09-2011, 09:06 PM	#1
cochino12 It followed me home? Join Date: Mar 2003 Location: Yup Posts: 5,751	Best way to get to ~400hp, 454 tbi. Anyone build one? Id like to get some more power out of my dually and I'm not exactly sure what route to take. Of course I dont want to spend a ton money and I do would like to keep it as reliable as possible. I might be selling my 2wd K5 to help fund upgrades but dont want to spend it all on the motor. Been doing some reading on tbichips.com and it sounds like its pretty expensive to do the fuel pump, throttle body, heads, chip, cam... Seems like it would be a whole lot cheaper to ditch the tbi and slap a cam, intake and some mild head work to get where I need to be. Anyone have experience with the 454tbi? Yes, I realize the truck has peanut port heads but it doesnt seem like the 400hp mark should be to hard to achieve, even with these boat anchor heads __________________ Adam That's why they call it a shortcut Kyle, if it was easy it would just be the way. 86 c-10 SWB 85 CCSB 90 GMC K30 Crew SRW 1985 C30 Dually Last edited by cochino12; 08-09-2011 at 09:14 PM.

08-09-2011, 09:43 PM	#2
critict1gc Registered User Join Date: Feb 2011 Location: Cold Spring, KY Posts: 36	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? you mentioned 3 things cheap reliable and lot of power pick 2

08-10-2011, 07:13 AM	#4
BigBlocksRule Registered User Join Date: Jun 2008 Location: Lubbock, TX Posts: 2,047	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Head over to 454SS.com, they have more big block TBI experience than anyone...

08-10-2011, 08:57 AM	#5
Greenlee Registered User Join Date: Jun 2004 Location: El Lago, TX Posts: 1,668	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Take away TBI and you hurt reliability in my opinion. Posted via Mobile Device

08-10-2011, 10:38 AM	#6
N2TRUX Happy to be here Join Date: Mar 2000 Location: Cypress, TX Posts: 39,023	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Talk to Scoti about this. He just spent some time in researching his motor build. He can give you a quick over view. If it were me, I would be looking at a 6.0 swap. __________________ Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra"

08-10-2011, 08:35 PM	#7
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,919	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Everything I read/found said if it's within your budget & for a cruiser, go 6.0/6.2 LS power. If it's still used as a truck & expected to tote a loaded trailer, the big-block grunt won't be matched by the LS (now, a turbo diesel would be another alternative....). Not wanting to get into the electronics of the LS swap, I did the tried & true basics focusing on air-in, air-out; w/minimal restrictions in between. Peanut port heads work fine for the rpm's a CC dually will see (there are always exceptions). I looked into closed-chamber heads to help compression further but there was too much conflicting info so I just went w/the PP's. Get a better intake manifold if still using a stock iron unit. Get a RV/towing cam (something geared to make torque down low vs power @ the top). Free flowing exhaust w/some 1 3/4" headers & 2.5" minimum exhaust tubing. I cheated a little on mine by doing flat-tops w/no dish since it had to be gone through (every little bit helps IMO). The TBI's are around 670cfm & said to work fine up to ~400hp (350 would be realistic) but would likely need the bump in fuel pressure to get it done. The 454ss forum did have some tips on fuel pump alternatives to keeps costs down so it's worth looking into. Those are the details scribbled on my notepad.... __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

03-18-2012, 01:44 AM	#9
KQQL IT At the body shop. Join Date: Aug 2009 Location: Land of fruits and nuts. Posts: 5,151	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? I did a generic hypertec tuner on my 99 old body 7.4 . Made a different truck out of it. Actually does something when i step on it. Posted via Mobile Device __________________ " That didnt make it any newer " " Dont antique the equipment " Last edited by KQQL IT; 03-18-2012 at 01:48 AM. Reason: a.d.d

03-18-2012, 06:03 PM	#11
gmc454crew Registered User Join Date: Mar 2012 Location: dallas, tx Posts: 3	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Thanks for the input. Any specific recommendations for the intake manifold? Also, due to a problem I had with a 5.3 I was reading up on lifters and rockers. I read something about changing to a "roller ball" rocker which would perform better than stock and also cooler. Heard anything about that? Thanks again.

03-19-2012, 01:34 AM	#13
gmc454crew Registered User Join Date: Mar 2012 Location: dallas, tx Posts: 3	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Thanks a lot guys. You've got me really excited about opening this up. My work has primarily been outside the engine, and I am looking forward to this. I will keep you posted.

03-19-2012, 03:29 AM	#14
rfmaster Registered User Join Date: Oct 2003 Location: OC CA Posts: 1,374	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? To get 400 HP out 454 TBI you'll need to consider the following changes: 1) Stock TB with 2" bores can provide 625 CFM, but stock injectors will limit amount of fuel needed to support 400 HP. Increasing fuel pressure is one possible option, but this approach will require that you run VRFPR - Aeromotive 13301. This unit will adjust fuel pressure from 17 PSI at idle (and increase from stock 13 PSI) to 25 PSI at WOT where extra fuel is needed to make the 400 HPs. Above assumptions are based on stock BBC TB with a pair of 80 lb-HR injectors (rated at 13PSI). There are plenty of alternatives to stock TB and they should be carefully considered. 2) EBL modified ECM (from dynamic EFI). This is a Swiss knife for tuning as you will needed it to achieve your HP goal. Chips are better left to history books (1990's are over). You'll be doing a lot of changes (Also TunerPro - free ware version is available) to fuel and SA tables. 3) Wide band O2 (WBO) - Zeitronix, Innovate, others. You need WBO to accurately dial in fuel mixture during WOT and elsewhere. 4) High volume - pressure fuel pump (FP). Either TPI or Vortec in tank FP should work and support 400HP target. 5) Previously mentioned, but worth noting - heads. Peanut heads are great for low RPM torque, but will keep high RPM HP potential down. A decent pair of AL aftermarket heads will provide additional HP. You do not need to go crazy high compression with today's gas 9.2:1 should be decent compromise. Make sure to calculate CR before purchasing heads. 6) Camshaft - keep in mind the big rat needs to breath, but keep duration at 0.050 reasonable and LSA above 112 deg to keep idle tuning headaches to minimum. With good heads and cam you can hit 400 HP well below 5000 RPM. 7) Exhaust system - true dual with 2-1/2 should do the trick. Quality built full length headers should be installed as cast iron manifolds choke engine high RPM breathing. 8) Heated NBO - a must with headers. 9) Yes, there will be a learning curve. //RF __________________ "The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)

03-19-2012, 02:18 PM	#15
jimbonice Registered User Join Date: Aug 2010 Location: White City, SK Posts: 411	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Seems like it would be a whole lot cheaper to ditch the tbi and slap a cam, intake and some mild head work to get where I need to be. Add headers and a bump in compression from the stock 8-1 to 9-1 and you're there. Throw a quadrajet on top to keep some semblance of part throttle economy and you've got a pretty cheap, powerful and reliable motor.

03-19-2012, 03:49 PM	#16
355bullet Registered User Join Date: Feb 2010 Location: el paso, tx Posts: 510	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Have you looked into the new efi from MSD? Its called the atomic http://www.atomicefi.com/ __________________ www.southwestdrags.com www.elpasocalendargirls.com www.msdignition.com www.atomicefi.com https://www.facebook.com/MSDperformance

03-19-2012, 04:41 PM	#18
355bullet Registered User Join Date: Feb 2010 Location: el paso, tx Posts: 510	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? runs great, i have one installed on my step side. here is one http://www.atomicefi.com/forum.aspx?g=posts&t=16551 __________________ www.southwestdrags.com www.elpasocalendargirls.com www.msdignition.com www.atomicefi.com https://www.facebook.com/MSDperformance

03-19-2012, 04:55 PM	#19
AntiGov Registered User Join Date: Oct 2011 Location: central Oregon Posts: 1,220	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? watchin closely....same deal 88 crew 454 tbi, lots of good ideas on here, im in the middle of paint and dwr to srw conversion so havent touched anthing under hood yet, was thinking of short term tune ,mid 90's intake, spacer, headers, duals.... then save for long term swap to zz454, 454HO, or 502.........but this thread got me thinking 300hp to 400hp tbi might be great alternative....love this site.... __________________ 88 3+3 454 400 205 410 drw to srw still in pieces 90 3+3 350 400 205 410 srw 84 1/2 ton lb 6.2 4x4 parts truck

03-19-2012, 10:22 PM	#20
jimbonice Registered User Join Date: Aug 2010 Location: White City, SK Posts: 411	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Here's a link to a number of budget 454 peanut port builds. Some impressive numbers. http://www.454ss.com/cgi-bin/forum/Y...num=1283147176



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08-08-2012, 11:22 PM	#21
JCampbell Account Suspended Join Date: Apr 2008 Location: Hesperia, Ca Posts: 1,332	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Any progress?

08-09-2012, 01:34 AM	#22
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Peanut port heads are fine. Look up demon engines 454 on google. Pulling 400hp out of a 454 is as easy as walking out and getting the paper. Get a bigger cam some headers and a mpfi injection system that will give the airflow and fuel demands you need. As I recall edelbrock makes a kit for this. Of coarse carbureted is the easiest way to go but to others somehow "unreliable". So you will have to warm it up tune it and deal with a little less mpg but a good enough carb tuner can make it to where there is no diff. And a proper setup electric choke will solve any cold start issues Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

01-02-2013, 07:55 PM	#23
JAMESCHURCH13 JamesChurch13 Join Date: May 2006 Location: Edwards AFB Sunny California Posts: 151	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? Did anyone finish this? I just bought an 87 quad cab dually with a 454TBI motor and wanted to go with a fast EFI unit... Until I saw this. I have a couple quadrajets I could get rebuilt and I have a nice intake to replace the stock TBI set up. Now I'm thinking I should stick it out with the rats nest of spliced wires the previous owner left me with. I wanna use my Long Tube headers and Torquer intake. Can I get rid of all my emissions crap and still use my stock TBI by just adding the O2 sensor to my headers? Thanks. __________________ *HG/FTW!!!* Current vehicle collection: 1968 Chevy C-10 SWB Fleet Side, 327ci, TH350 (MD) 1987 Chevy Dually Quad Cab, 427ci, TH400 2008 Buell XB12SS, 1203cc 2006 YZ450F Wheelie Machine! 1997 Suzuki Bandit 600cc And the Wife has some cars I pay insurance on and use to transport the kids!(01' Grand Cherokee and 06' Pontiac Grand Prix)

01-02-2013, 08:26 PM	#24
school boy Registered User Join Date: Apr 2012 Location: Loretto Ky Posts: 318	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? take this into consideration, http://bankspower.com/products/show/128/67 the cams in these motors are small, i beleive in the .430 lift range

01-02-2013, 09:06 PM	#25
Ziegelsteinfaust Registered User Join Date: Dec 2012 Location: Temple City Posts: 3,566	Re: Best way to get to ~400hp, 454 tbi. Anyone build one? I would try the basic bolt-ons, and take a look back when your done. Get the TBI bowl it flows air into the tbi better, headers, exhaust, chip or tuner, electric fans if you like. I don't know how well do when towing. A friend of mine from work just did the above on a 130K 4.3 in a 1992 extended cab, and it made a world of difference. It now almost feels like he has a good running 305 in there. So it should due pretty well for you in your big truck, and if it doesn't produce as much as you want. Your better off for the next step in the build. The only thing I would of done different would of been to add roller rockers.

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