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07-06-2014, 11:42 AM | #1 |
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Location: Cary, NC
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Just another twin turbo 4.8L build. Project "Short stroke"
Around April of last year I bought my 1979 K10 for $1000 and limped it 2 hours home. It had no brakes what so ever and was leaking oil like crazy. Any who I brought it home cleaned it up and drove it around for a few months after working a few kinks out of it.
The truck from the factory had a 350/th350/np203 setup but at some point an '80-82 305 was swapped in. And boy was she tired. Once those kinks were worked out I went four wheeling a few times... the last time I got cocky since I knew my reverse was going out... it went out lol. Que in the twin turbo LS build. I was thinking about rebuilding the trans and then building a 350 for the truck but after about a month of pressure from friends I decided to go LS. But I wanted to take it farther then that. So I got a 5.3/4l60e/NP241 setup going in right now that I'm almost done with. Wiring is being done by a good friend of mine and I just need to set up the 4l60e linkage, fuel system, and exhaust... Cake. While I'm driving the K10 I'll be building the 4.8l for the setup. I have a build thread for the truck but I wanted to make a secondary thread in here on my setup so I can ask questions about what I'll end up doing. Haven't thought much on the transmission I will use but I definitely want a manual. So walking around the junkyard looking for a good motor to use and I found just that. It's a 1999 4.8L engine. The engine spun freely and I pulled the passenger side head off and saw that it had flat top pistons. I knew it was what I was looking for. Pulled the motor and grabbed a few things that I need for the 5.3L and I was on my way home. The engine will sit for the most part until I get the truck running and driving and then I will turn all of my focus on that. I don't plan on four wheeling much anymore unless its light trails/the beach. I put my first dent in the bedside and I decided I had enough lol. Build thread for the truck is here. http://67-72chevytrucks.com/vboard/s...d.php?t=605433
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
07-06-2014, 11:53 PM | #2 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Couldn't help myself today... i just had to dive in. Pressure washed as much grease off as I could.
Here is before I started cleaning Nasty Nasty nasty Pulled all that crap off and started prepping for the wash... idk why I even put rags in the head... Finally got her clean...er
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
07-07-2014, 12:01 AM | #3 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Some more pics
Deliciousness in the oil pan My beautiful helper And this is how it'll sit until I can get back at it next weekend.
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
07-07-2014, 07:51 AM | #4 |
mini truck racer
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Location: Baytown , texas
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Wow , that motor was abused .
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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 |
07-07-2014, 12:18 PM | #5 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Yes it was. I grabbed this one because I was planning on tearing down the motor anyway. Might as well grab the motor No one would plan to use. The outside of the truck was pretty clean. Anything drive train wise was Discusting
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
07-07-2014, 08:18 PM | #6 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Are you going to rebuild it? Or just hone it and pray? hahaha
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David Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991 My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985 Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557 Instagram: myfabguy |
07-07-2014, 08:48 PM | #7 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Haha definitely going to build this one. I really want a reliable build. Pulling a motor every year will get annoying to me. I've got a lot of planning and research to do for this motor still. Main focus is getting the truck running with the 5.3 for now.
Definitely looking at getting 2 70 mm turbos. Haven't decided on the cooling system yet whether I want to run one or go e85 and methanol injection... I'd like to be able to get fuel for the truck locally so I need to find out what's available in my area. No need building the engine if I can't fuel it. Once I figure out what fuel I want to run the rest of the system will come together. The main answer to most questions geared towards this build will end with "because race truck"
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
07-07-2014, 09:09 PM | #8 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Very cool. I wish we had E85 around here, hell we dont even have 93. I think twin 70's is going to be way to big though. Probably something closer to twin 35's. I plan on doing a turbo on my 5.3, eventually....
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David Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991 My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985 Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557 Instagram: myfabguy |
07-07-2014, 09:20 PM | #9 | |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Quote:
Video of his car. His name on ls1 - tech Is wicked69. This is his thread. http://ls1tech.com/forums/forced-ind...tml?styleid=26 Oh and It's a daily driver
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
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07-07-2014, 09:55 PM | #10 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
I have seen him on the Tech. For some reason I thought he was running smaller turbos. I stand corrected
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David Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991 My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985 Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557 Instagram: myfabguy |
07-08-2014, 02:13 AM | #11 |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
I clicked for turbo's and all I see is engine sludge
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
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07-08-2014, 09:30 AM | #12 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Hahaha!! They'll be on the way here soon I promise.
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
07-08-2014, 10:23 AM | #13 |
mini truck racer
Join Date: Aug 2006
Location: Baytown , texas
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
I am also interested in this build . I have a S-10 with a 5.3 and would like to do a single 70-76mm intercooled pump gas build .
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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 |
07-08-2014, 11:32 AM | #14 |
On a budget like Fred Sanford
Join Date: Oct 2005
Location: Topeka, KS
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
I think you'll want to rethink your turbo choice unless you're shooting for silly power, especially in a big ol truck. I'm knee deep in a twin turbo build on my 4th gen camaro and I'm using twin turbonetics 6165's on a 370ci motor. I'll have enough compressor wheel to make over 1200hp without taxing them hard. Twin 70s is nutso unless you want 1500+hp IMO. Looks like a cool build!!
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'85 Silverado swb: 383 stroker, 10.5:1, vortec heads, 232/238 roller cam, RPM air gap, performer 750 carb, stainless longtubes, 3" duals/super 44's, T56/4.11 383ci build / exterior refresh thread '98 Camaro z28: 370ci twin turbo 370ci build '01 Tahoe LT 4x4: 5.3, longtubes/ory, magnaflow duals, custom tune....wife's DD |
07-08-2014, 11:12 PM | #15 | ||
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Quote:
Quote:
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
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07-09-2014, 01:48 AM | #16 | |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Quote:
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David Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991 My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985 Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557 Instagram: myfabguy |
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07-09-2014, 08:37 AM | #17 | |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Quote:
Don't get me wrong, if it was a 6.oh sitting in that truck I would've grabbed that pretty darn quick haha
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
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07-10-2014, 03:17 AM | #18 |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
For a turbo build, I'm an animal of opportunity at this point. If you got a 6.0, then use it...otherwise, run what you can find. In my case, I've already got 6.0 parts around, and a few sets of heads...so going to the smaller bore wouldn't make sense, as I lose use of those good parts.
If your pulling something out of a yard, who cares? Most of the time, on the first incarnation of any big hp build, you just "build it" by running it till it blows, then upgrading whatever broke. Heck thats how you used to do it before guys had money for complete "stages" of upgrades etc.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
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07-10-2014, 12:08 PM | #19 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
I suggest rethinking the size of the turbos as well. I spoke to several turbo companies before I settled on twin Precision 67/68's for my 418" LS motor. My motor is 131 cubic inches bigger than yours and these turbos on my motor should make 1200rwhp all day long and carry RPM to roughly 7,000.
Here is a 427" LS with Precisions 67/66 making 1143rwhp on 19lbs boost. http://ls1tech.com/forums/dynamomete...1040-rwtq.html The point I am trying to make is selecting a turbo based on CFM required for your power goals and selecting the smallest one to achieve that will most likely make you much happier when it comes to spool time in a truck. Spool is sort of like converters or cams, each person has their own interpretation of how much "lag" is acceptable.
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------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 |
07-10-2014, 02:26 PM | #20 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Super73-Question for you (since you probably know).
Looking at Sinister's build he has the twin 70's. Does the fact that he is running E85 make up a significant difference for lag time? I know that you have to run a larger amount of fuel but does that necessarily produce a larger gas volume? One good thing about using turbos too large for your 4.8 is that when you blow it up (if you do) then you wont have to buy new ones for a 6.0 or 408.
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David Used parts build: http://67-72chevytrucks.com/vboard/s...d.php?t=638991 My brother's Nova: http://www.67-72chevytrucks.com/vboa...d.php?t=727985 Rear suspension rework: http://www.67-72chevytrucks.com/vboa...d.php?t=750557 Instagram: myfabguy |
07-10-2014, 03:17 PM | #21 |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
I don't believe the fuel volume will help in spool time.
If twin 67/68's move enough air to make 1200rwhp on a 418" motor, they well surely move enough air to do the same on a 4.8. I have seen twin 66's make 1100rwhp. Again it comes down to ones goals.
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------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 |
07-10-2014, 04:37 PM | #22 | ||
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Quote:
And one thing I want to make sure of is to avoid being over cammed/turbo'd Quote:
Without a doubt. Speaking of goals, I never mentioned in a previous post what my goals were... originally when I thought about doing this I was thinking around 650hp... but since the truck will be running soon and I'll be building this engine outside of the truck I don't see why I can't aim for an 800+ hp build.
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
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07-11-2014, 01:14 AM | #23 | |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Quote:
I know Wasted Income runs pump gas, but uses methanol injection instead of an intercooler on his blazer. Not sure how his lag is tho.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING MY BUILD THE H8RDCPTR //\\ MY YOUTUBE CHANNEL REV J HD
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07-11-2014, 02:02 AM | #24 |
Second Chance Program
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Smaller turbos for sure. The truck will be alot funner to drive with 700hp than it would with 1200hp.
What exactly are your intentions with this truck? DD? Are you doing to drag race it a bunch? etc. That will determine alot about what direction you want to go in. But you can get these motors to idle nice with the AC on and make the 700hp and make it just a sweet running DD sleeper.
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90 Chevy Suburban 2500 5.3 swap/th400/np241/14bltSF/10blt. 77 C20 crew cab Silverado. 396/th400. In work. |
07-12-2014, 07:27 PM | #25 | |
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Re: Just another twin turbo 4.8L build. Project "Short stroke"
Quote:
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Austin 1996 Chevrolet K1500 Silverado 1979 Chevrolet K10 Scottsdale - Carolina K10 - My 4.8L Twin turbo build - Project Short Stroke - Instagram - TheBlueBomber1996 |
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