496 to be DYNO'D! - Page 3 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

69GMC910 · 03-04-2012, 11:14 PM

Final answer? Are you gonna lock in that answer?!!! Lol! I hope his dyno is fixed tomorrow!! As soon as I get the results, they WILL be posted!!!
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djunkie · 03-04-2012, 11:37 PM

I'm guessing about 625hp. My 496 in my boat is 10.5-1. Ported afr 315's. Bigger hydraulic roller cam than yours and a victor jr with an 850 Holley made 661hp/615tq.
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djunkie · 03-04-2012, 11:43 PM

Schiada idling - YouTube

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69GMC910 · 03-04-2012, 11:48 PM

That sounds AWESOME!!!!
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69GMC910 · 03-05-2012, 12:34 AM

You answered it at the same time as I asked it! 630hp! Noice! I'm in Beaumont...
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69GMC910 · 03-06-2012, 12:04 AM

my bad on the cam specs...

Super73 · 03-06-2012, 12:31 AM

I am always interested in modeling motors in performance trends. Mind sharing actual head flow data at. 300 .500 .600? Also. Is the motor set up with factory tolerances or a little looser? Factory widange or does it have a tray and good pan?
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Boogie_Man · 03-06-2012, 01:17 AM

Ooo Emm Gee... That vid was sick! Looking forward to hearing your numbers dude!

*Vortecpro* · 03-06-2012, 01:28 AM

Quote:

Originally Posted by Super73

I am always interested in modeling motors in performance trends. Mind sharing actual head flow data at. 300 .500 .600? Also. Is the motor set up with factory tolerances or a little looser? Factory widange or does it have a tray and good pan?
Posted via Mobile Device

Flow @ 28 inches, 4.310 bore. .200 171 .300 233 .400 281 .500 317 .550 323. 270 CC runner. Deep pan. Very low drag bottom end. 600 HP by 4900 RPM, 700 HP @ 6300 RPM 238@.050 HYD roller.

shawnt · 03-06-2012, 08:54 AM

Hmm, with flow numbers I change to 713 hp @ 6400.

All these 500hp guess wont get the virtual high five. It WILL be 665+ I guarantee that

ripdog28 · 03-06-2012, 09:53 AM

If Mark says 700 @ 6300, that is with in a few numbers. He has built more then enough and flowed way too many heads to know what itll make.

I want him to do my next build.

hotrod 80 · 03-06-2012, 12:38 PM

662 hp

Super73 · 03-06-2012, 01:21 PM

Numbers PT gave are below running 91 octane and 165* coolant temps.

Adjusting windage and setting the bottom end to a lower drag set up netted a pinch over 30ftlbs and 30hp through out the full curve bringing 641ftlbs @ 4,600 and 629hp @ 5,600.

Adjusting headflow after adjusting the windage/friction netted 642ftlbs @ 4,500 and 630hp at 5,700. Keep in mind, I don't have updated flow numbers for the exhaust which could move things higher if I had them. Also, wish I had .600 numbers to use over .550. I have found the program to be most accurate using .300 .500 and .600. I know the intake side of the cam never sees that lift, but it just works better. Could be showing less power with that as well.

Also, Mark did not provide all the details on the cam. IE intake centerline and LSA. I am going off previously posted LSA and a 112 ICL.

Unfortunately the program is only as good as the info provided. It has proven itself time and time again when ALL the accurate data is given. But there is a lot of guess work here. I hope it is conservative and you get to that 640+ftlbs @ 4,900 and 700hp @ 6,300 Mark is mentioning. I know this isnt the first motor Mark has built.

Super73 · 03-06-2012, 01:27 PM

One additional comment, If you take the power curve PT gave, move it up 300rpm which is closer to where Mark says it will make peak TQ
642ftlbs@4,900=599hp
580ftlbs@6,000=662hp
536ftlbs@6,400=653hp

RatPwrd72 · 03-06-2012, 05:55 PM

I'll go with Mark over the air dyno any day. That is all.

*Vortecpro* · 03-06-2012, 10:37 PM

Quote:

Originally Posted by Super73

One additional comment, If you take the power curve PT gave, move it up 300rpm which is closer to where Mark says it will make peak TQ
642ftlbs@4,900=599hp
580ftlbs@6,000=662hp
536ftlbs@6,400=653hp

My 9.5 compression 049 headed 496s with a 238 @ .050 HYD rollers go 670 @ 6200 RPM and 660 TQ.

ripdog28 · 03-06-2012, 11:41 PM

Quote:

Originally Posted by Vortecpro

My 9.5 compression 049 headed 496s with a 238 @ .050 HYD rollers go 670 @ 6200 RPM and 660 TQ.

gearys 5600 · 03-07-2012, 12:08 AM

sign me up for a steel headed 9-1 comp, small cam, 496 that makes 700 H.P.

Sounds like I wasted a ton of money bulding my 496 !! 13.5 to 1 comp, brodix cnc'd bb2 extras, big solid roller, super victor,1150 dominator that made a little over 800 h.p.

*Vortecpro* · 03-07-2012, 09:59 AM

Quote:

Originally Posted by gearys 5600

sign me up for a steel headed 9-1 comp, small cam, 496 that makes 700 H.P.

Sounds like I wasted a ton of money bulding my 496 !! 13.5 to 1 comp, brodix cnc'd bb2 extras, big solid roller, super victor,1150 dominator that made a little over 800 h.p.

How about a 11.5 comp, 049 headed solid roller, 4150 carbed, 800 HP engine....

*Vortecpro* · 03-08-2012, 11:56 AM

Quote:

Originally Posted by gearys 5600

sign me up for a steel headed 9-1 comp, small cam, 496 that makes 700 H.P.

Sounds like I wasted a ton of money bulding my 496 !! 13.5 to 1 comp, brodix cnc'd bb2 extras, big solid roller, super victor,1150 dominator that made a little over 800 h.p.

I cant sign you up, I dont have 9.1 comp 700 HP steel headed engines, but I do have 9.5-9.6 comp, hyd roller, 238@.050 steel headed engines making 670 HP.

Super73 · 03-07-2012, 03:06 AM

Quote:

Originally Posted by Vortecpro

My 9.5 compression 049 headed 496s with a 238 @ .050 HYD rollers go 670 @ 6200 RPM and 660 TQ.

Again, I don't have the full scoop on the motor. Garbage in = Garbage out. The program has proven itself with in 2% on quite a few wild motors. Not saying this build won't make what you are saying, just using the info that I have.

69GMC910 · 03-06-2012, 06:10 PM

My guess is 711hp, 684tq
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C20-67_N_MO · 03-06-2012, 07:23 PM

Not going there at all.

SBC forever!

Sounds like you'll have a beast no matter what the numbers will be.

Have fun.

C20-67_N_MO · 03-08-2012, 05:23 PM

Quote:

Originally Posted by C20-67_N_MO

Not going there at all.

SBC forever!

I've been curious as friends of mine (and me at times) have stated it will cost more to build a hot BBC than a SBC.

Now I am not trying to hijack this thread so don't tak offense. As I know there is no replacing Displacement on CI.

As I know the BBC make some Monster torque numbers. Okay let me just end this here. Cuz I could make a new thread of BBC vs. SBC and most would go towards the BBC.

I was just wondering aloud while at work.

RatPwrd72 · 03-08-2012, 06:58 PM

Cubic dollars is what it takes to go fast, and they sure go alot farther when building a BBC than they do building a SBC or LS based engine.

03-04-2012, 11:14 PM	#1
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! Final answer? Are you gonna lock in that answer?!!! Lol! I hope his dyno is fixed tomorrow!! As soon as I get the results, they WILL be posted!!! Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

03-04-2012, 11:37 PM	#2
djunkie Registered User Join Date: May 2011 Location: Lomita. Ca. Posts: 127	Re: 496 to be DYNO'D! I'm guessing about 625hp. My 496 in my boat is 10.5-1. Ported afr 315's. Bigger hydraulic roller cam than yours and a victor jr with an 850 Holley made 661hp/615tq. Posted via Mobile Device

03-04-2012, 11:48 PM	#4
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! That sounds AWESOME!!!! Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

03-05-2012, 12:34 AM	#5
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! You answered it at the same time as I asked it! 630hp! Noice! I'm in Beaumont... Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

03-06-2012, 12:04 AM	#6
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! my bad on the cam specs... __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph

03-06-2012, 12:31 AM	#7
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 496 to be DYNO'D! I am always interested in modeling motors in performance trends. Mind sharing actual head flow data at. 300 .500 .600? Also. Is the motor set up with factory tolerances or a little looser? Factory widange or does it have a tray and good pan? Posted via Mobile Device __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

03-06-2012, 01:17 AM	#8
Boogie_Man Registered User Join Date: Jan 2012 Location: Texas City, TX Posts: 115	Re: 496 to be DYNO'D! Ooo Emm Gee... That vid was sick! Looking forward to hearing your numbers dude! __________________ '71 Short Stepper - One piece at a time!

03-06-2012, 08:54 AM	#10
shawnt Registered User Join Date: Sep 2008 Location: sulphur springs texas Posts: 141	Re: 496 to be DYNO'D! Hmm, with flow numbers I change to 713 hp @ 6400. All these 500hp guess wont get the virtual high five. It WILL be 665+ I guarantee that __________________ Shawn 85 SWB 7.39 @ 93 Best so far with 0 tuning Lesson in life: Never fry bacon naked! Last edited by shawnt; 03-06-2012 at 08:59 AM.

03-06-2012, 09:53 AM	#11
ripdog28 Registered User Join Date: Apr 2008 Location: Imperial Beach, CA Posts: 1,040	Re: 496 to be DYNO'D! If Mark says 700 @ 6300, that is with in a few numbers. He has built more then enough and flowed way too many heads to know what itll make. I want him to do my next build. __________________ 69 c-10 BBC 462ci, forged crank, H-beam rods, 10.5-1 KB forged pistons, Dart Iron Eagle 308cc, Straub Cam, Comp Cams chrome moly full rollers, Weiand Team G, Prosystems 950, TH400/3500 Dalenzie stall, Currie 9+ Detroit Locker w/31spline axles.3.5/6in drop. My Build.

03-06-2012, 12:38 PM	#12
hotrod 80 mini truck racer Join Date: Aug 2006 Location: Baytown , texas Posts: 3,010	Re: 496 to be DYNO'D! 662 hp __________________ 1949 5-window 1969 Camaro 1976 Chevy Luv yellow 1978 Chevy Luv Blue 1976 Chevy Luv Black 1979 Firebird Flooded in Harvey 1999 F350 Dually 2005 GMC Sierra 4.8 RCSB 2014 Explorer (wifes) My build :http://67-72chevytrucks.com/vboard/s...d.php?t=399148 Build #2: http://67-72chevytrucks.com/vboard/s...d.php?t=653583

03-06-2012, 01:21 PM	#13
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 496 to be DYNO'D! Numbers PT gave are below running 91 octane and 165* coolant temps. Adjusting windage and setting the bottom end to a lower drag set up netted a pinch over 30ftlbs and 30hp through out the full curve bringing 641ftlbs @ 4,600 and 629hp @ 5,600. Adjusting headflow after adjusting the windage/friction netted 642ftlbs @ 4,500 and 630hp at 5,700. Keep in mind, I don't have updated flow numbers for the exhaust which could move things higher if I had them. Also, wish I had .600 numbers to use over .550. I have found the program to be most accurate using .300 .500 and .600. I know the intake side of the cam never sees that lift, but it just works better. Could be showing less power with that as well. Also, Mark did not provide all the details on the cam. IE intake centerline and LSA. I am going off previously posted LSA and a 112 ICL. Unfortunately the program is only as good as the info provided. It has proven itself time and time again when ALL the accurate data is given. But there is a lot of guess work here. I hope it is conservative and you get to that 640+ftlbs @ 4,900 and 700hp @ 6,300 Mark is mentioning. I know this isnt the first motor Mark has built. __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49 Last edited by Super73; 03-06-2012 at 01:30 PM.

03-06-2012, 01:27 PM	#14
Super73 Registered User Join Date: Nov 2007 Location: Bay Area, Ca Posts: 2,841	Re: 496 to be DYNO'D! One additional comment, If you take the power curve PT gave, move it up 300rpm which is closer to where Mark says it will make peak TQ 642ftlbs@4,900=599hp 580ftlbs@6,000=662hp 536ftlbs@6,400=653hp __________________ ------Motor---------------Bottle 60'---1.53---------------1.41 1/8---6.58 @ 105.92----5.87 @ 118.41 1/4---10.38 @ 126.97----9.24 @ 142.49

03-06-2012, 05:55 PM	#15
RatPwrd72 Registered User Join Date: Jan 2005 Location: Maysville, OK Posts: 227	Re: 496 to be DYNO'D! I'll go with Mark over the air dyno any day. That is all. __________________ 1972 Chevy Cheyenne Super- Pump gas 496,TH-400, TCI Stall, 3.73's,Ochre & White two-tone w/Olive Interior 1967 Chevy Short Step Drag Truck-Iron Headed 468 Making Memories My momma took me off the bottle years ago.....

03-07-2012, 12:08 AM	#18
gearys 5600 Registered User Join Date: Mar 2010 Location: tulsa,ok Posts: 1,085	Re: 496 to be DYNO'D! sign me up for a steel headed 9-1 comp, small cam, 496 that makes 700 H.P. Sounds like I wasted a ton of money bulding my 496 !! 13.5 to 1 comp, brodix cnc'd bb2 extras, big solid roller, super victor,1150 dominator that made a little over 800 h.p. __________________ MY BUILD THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=423629 1969 custom/10 swb--SOLD 1968 swb 50th anniv.--SOLD 1967 camaro ss/rs..LS-6-speed, 16-year long project 1956 chevy nomad 1955 chevy 210 2-dr sedan 1978 el-camino ss 1-owner

03-06-2012, 06:10 PM	#22
69GMC910 MOTORHEAD! Join Date: May 2000 Location: Devon AB, Canada Posts: 849	Re: 496 to be DYNO'D! My guess is 711hp, 684tq Posted via Mobile Device __________________ 82 GMC High Sierra VortecPro 496 12 Bolt, 3.42's AFR 265 Holley 850 Performer RPM Air Gap Hooker 2455's TCI Turbo 400 Super Street Fighter TRRC 12 Bolt Eaton Posi Mark Williams Axles Cal-Tracs Hoosier 30x10.5 Radial Slick Full weight long box pickup Current best- 11.33@117mph



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03-06-2012, 07:23 PM	#23
C20-67_N_MO Champagne Taste on Beer Budget Join Date: Dec 2008 Location: High Ridge, Missouri Posts: 2,190	Re: 496 to be DYNO'D! Not going there at all. SBC forever! Sounds like you'll have a beast no matter what the numbers will be. Have fun. __________________ Coming Soon: Project 1970 Country Truck

03-08-2012, 06:58 PM	#25
RatPwrd72 Registered User Join Date: Jan 2005 Location: Maysville, OK Posts: 227	Re: 496 to be DYNO'D! Cubic dollars is what it takes to go fast, and they sure go alot farther when building a BBC than they do building a SBC or LS based engine. __________________ 1972 Chevy Cheyenne Super- Pump gas 496,TH-400, TCI Stall, 3.73's,Ochre & White two-tone w/Olive Interior 1967 Chevy Short Step Drag Truck-Iron Headed 468 Making Memories My momma took me off the bottle years ago.....

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