Non Pontiac Motors in Pontiacs includes factory 403,305,350 Chevy, Buick V6,
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Old 02-11-2015, 03:55 AM
smokepedal smokepedal is offline
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Default Turboed LS 70 GTO

Hey guys, I just wanted to get your thoughts on my build. I'm building a Turboed 70 LS GTO like the thread title says. I have a 6.0 LQ4 with 317 heads and a stock cam for now. I want this car to get decent mileage so I am going to keep it fairly mild right now as far as the cam goes. Not sure how to upload images right now. I'll figure it out.

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Old 02-11-2015, 04:14 AM
smokepedal smokepedal is offline
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just checking. let me know if everybody can see it.

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Old 02-11-2015, 04:16 AM
smokepedal smokepedal is offline
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http://forums.maxperformanceinc.com/...ictureid=11643

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Old 02-11-2015, 04:19 AM
smokepedal smokepedal is offline
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Oh, and I have a 4l80e with the factory rear end. 3.08 gears I think.

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Old 02-11-2015, 11:21 AM
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What are you using for turbo exhaust manifolds?

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Old 02-11-2015, 11:29 AM
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If you need help with the cam, contact me. I've made several cams for turbo-LS motors. Several putting 600-700hp to the wheels, the wildest one put over 1100 to the wheels with unported L92 heads.

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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.

'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust

My webpage http://lnlpd.com/home
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Old 02-11-2015, 12:04 PM
smokepedal smokepedal is offline
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Quote:
Originally Posted by 69FIREBIRD76MM View Post
What are you using for turbo exhaust manifolds?
Truck manifolds.

There is a link to a gallery. Not sure how to put pics directly in the thread.

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Old 02-11-2015, 12:07 PM
smokepedal smokepedal is offline
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Quote:
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If you need help with the cam, contact me. I've made several cams for turbo-LS motors. Several putting 600-700hp to the wheels, the wildest one put over 1100 to the wheels with unported L92 heads.
Nice! Wow, I really want this to be a daily driver with good street manners and fuel economy. I know that as soon as you start getting much duration the fuel economy goes away.

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Old 02-11-2015, 02:06 PM
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Originally Posted by smokepedal View Post
Nice! Wow, I really want this to be a daily driver with good street manners and fuel economy. I know that as soon as you start getting much duration the fuel economy goes away.
My intake lobes for turbo cams are all fairly small. Even the 1100+ hp cam was in the 240's @ .050. The trick is getting the exhaust valve to open at the right time, and getting the right amount of overlap.

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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.

'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust

My webpage http://lnlpd.com/home
  #10  
Old 02-11-2015, 10:59 PM
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And that'll fit under the hood? Subscribed ....

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Old 02-11-2015, 11:42 PM
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Yeah, It barely fits under the hood.

The oil pan is about 3/4 inch from the crossmember and the top of the alternator was touching. It was a 140 amp alternator so I swapped it out for the small case delphi alternator like 105 amp. The exhaust piping was fabricated with the engine in the car. The turbo suction has a cone air filter basically up against the core support on the passenger's side. The exhaust downpipe is 4" just after it comes out of the turbo and just barely clears the frame and inner fender. You can see the body work I had to do to the exhaust.

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Old 02-11-2015, 11:44 PM
smokepedal smokepedal is offline
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I took an air hammer to the transmission tunnel and opened it up a little. Some places a lot to fit the 4l80 but you can barely tell and can't at all from the inside.

  #13  
Old 02-12-2015, 02:15 PM
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Need to put this on non Pontiac motor thread !

  #14  
Old 02-12-2015, 02:32 PM
smokepedal smokepedal is offline
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It fits multiple categories.

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Old 02-12-2015, 03:41 PM
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Quote:
Originally Posted by JOE DEYTON View Post
Need to put this on non Pontiac motor thread !

Thank You!



GTO George

  #16  
Old 02-12-2015, 05:54 PM
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Quote:
Originally Posted by smokepedal View Post
It fits multiple categories.
This.

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  #17  
Old 02-12-2015, 07:51 PM
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Looks good and should haul ass. You dont need a bunch of high dollar parts to go fast with a turbo!

  #18  
Old 02-13-2015, 02:34 AM
smokepedal smokepedal is offline
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I get it, not welcome because I put a Chevy engine in a GTO. What if it were a 6.0 from a new generation GTO or G8? It's not but we don't need pedantic hating. I have a 72 LeMans that has a 463 in it. I am just tired of getting 8 miles per gallon. I want something I can drive all of the time. I want to replace my truck as a daily driver.

  #19  
Old 02-13-2015, 09:24 AM
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Quote:
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Looks good and should haul ass. You dont need a bunch of high dollar parts to go fast with a turbo!

No but if you want it to stay together you better spend some bucks!


GTO George

  #20  
Old 02-14-2015, 11:20 AM
Tom McQueen Tom McQueen is offline
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Quote:
Originally Posted by JOE DEYTON View Post
Need to put this on non Pontiac motor thread !
-------------------------------------------------------------------------------

X2.

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Check out my 70 GTO build;
http://www.yellowbullet.com/forum/sh....php?t=1148602
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