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Old 12-11-2005, 01:12 AM   #1
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Default 5.7l Vortec performance upgrades

whats some good bolt ons for a vortec 5.7l? i got one. it misses and this stuff gives me a reason to pull it apart n put some good stuff on it. all info appreciated.
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Old 12-11-2005, 08:38 PM   #2
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Hey man i am right there with you... best things if its bone stock are catback, CAI, and headers. You have to get it breathing first then you can go with the more expensive and in depth projects, like cam and tune and some 4.10's out back.
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Old 12-14-2005, 08:37 AM   #3
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a cam would be a good choice, but im not sure what gen motor that is. I know its not a Gen III, but i dont know the difference between the GEN 1 and 2 motors. If anyone knows please chime in.
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Old 12-14-2005, 08:55 AM   #4
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If my understanding of what is commonly discussed is correct, Gen II engines are the LT1/LT4 Corvette/F-body/ImpalaSS engines with reverse cooling and optispark ignition, but otherwise very similar to your standard Gen I small block Chevy (SBC). The 1996 5.7L Vortec engine has different heads that would require different intake than your run of the mill Gen I SBC, but otherwise everything would be interchangeable. (I think)
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Old 12-14-2005, 08:58 AM   #5
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mine is stock but maybe some upgraded are in order.
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Old 12-14-2005, 10:31 AM   #6
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Heres what i did to my 5.7 vortec



My newest upgrades

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Old 12-16-2005, 12:10 AM   #7
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The L35 S10 V6 torque converter is the same as what the the 1999 and up NBS guys do with a trailblazer converter.
behind my bolton L31, I get a stall of 2500 rpm.

Its worth a at least a tenth in the 60ft, and a couple tenths in the 1/4. itsa nice gain for cheap.

peace
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Old 12-16-2005, 12:12 AM   #8
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Quote:
Originally Posted by NBred94
If my understanding of what is commonly discussed is correct, Gen II engines are the LT1/LT4 Corvette/F-body/ImpalaSS engines with reverse cooling and optispark ignition, but otherwise very similar to your standard Gen I small block Chevy (SBC). The 1996 5.7L Vortec engine has different heads that would require different intake than your run of the mill Gen I SBC, but otherwise everything would be interchangeable. (I think)
Everything is correct, the Vortec L31 is reffered to as a GEN 1-E engine, E means enhanced.

The L31 was made from 1996-2005. 96-99 in trucks up to 2001 in vans and up to 2005 in the heavy commercial trucks.

pauly
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1/4 mile stats(bests)
Stock-15.9@82mph 2.490 60ft
Mods-14.8@94mph 2.007 60ft(b4 TC&intake)
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Old 12-16-2005, 04:20 PM   #9
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I highly recomend getting some good custom programming. with the proper programming and a 160 thermostat, there is alot of power to be had. I also highly recomend using the L35 torque converter. With some mild bolt on's including exhaust, L35 converter, Zippy shift kit, Zippy Performance programming, 160 thermostat, and 275/50/17" Nitto's, i was able to get a customer's Tahoe to run a 15.2 in the quarter. With me in the truck the Tahoe weighed in at 4937lbs. This was with a stock paper air filter and a slight headwind. In the right weather with the later added CAI and a bit more tuning the heavy pig would have been able to make it into the 14's for sure.
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Old 12-17-2005, 03:46 PM   #10
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Default good place to get a converter

Is there any good place to get a L35 converter besides a wrecking yard or ebay. I am looking for one a little newer. thanks
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Old 12-17-2005, 03:46 PM
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