LS3, 430hp upgrade?
10-17-2013, 05:06 PM
#1
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LS3, 430hp upgrade? Hi!
A friend of mine has a LS3 430hp crate engine.
HeŽd like 500+ hp.
What to do?
What kind of ECU is needed? (doesnŽt have one)
Also,... what camshaft would You recommend?
RPM range approx. 1500-6000
The car is used as a daily driver and occasional autocross driving.
Chevelle -66, LS3, T56.
Thanks. Mike.
A friend of mine has a LS3 430hp crate engine.
HeŽd like 500+ hp.
What to do?
What kind of ECU is needed? (doesnŽt have one)
Also,... what camshaft would You recommend?
RPM range approx. 1500-6000
The car is used as a daily driver and occasional autocross driving.
Chevelle -66, LS3, T56.
Thanks. Mike.
10-17-2013, 07:31 PM
#4
TECH Resident
Super Chevy did an article in 2008 about LS1 and LS2 upgrades. They took a stock 405hp LS2 and added headers, and dynoed it at 462hp. I would imagine an LS3 with headers, a tune, and maybe a cold air intake would be creeping up on 500hp
10-17-2013, 10:41 PM
#5
The 430HP LS3 has been dynoed many times over the years by different sources. If I remember right, all of the figures were between 489 and 511 HP. The 430 HP rating is a very conservative rating by GM.
I've seen a dyno test of LS3 with the HOT cam producing around 520HP. I don't remember the exact figure but it was between 520 and 530.
The dyno test of the LS3 with a HOT cam appeared in a previous issue of "GM High Tech Performance" It was a LS cam test article and there were many cam choices that were better than the GM HOT cam, although most of the others cams required new valve springs.
I've seen a dyno test of LS3 with the HOT cam producing around 520HP. I don't remember the exact figure but it was between 520 and 530.
The dyno test of the LS3 with a HOT cam appeared in a previous issue of "GM High Tech Performance" It was a LS cam test article and there were many cam choices that were better than the GM HOT cam, although most of the others cams required new valve springs.
10-19-2013, 08:39 AM
#6
Friend of mine had an 08 Vette with 40K on the clock. He added a cold air
intake Long tube headers with a ZO6 factory cat-back exhaust. He called
Texas Speed and the shipped him a 231/237 @ .050" cam with .6xx lift,
push rods, and a dual spring kit. That's all he did and it dyno tuned at 489 horsepower RW.
intake Long tube headers with a ZO6 factory cat-back exhaust. He called
Texas Speed and the shipped him a 231/237 @ .050" cam with .6xx lift,
push rods, and a dual spring kit. That's all he did and it dyno tuned at 489 horsepower RW.
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10-19-2013, 02:26 PM
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Thanks. for the answers.
I think we wait with the camshaft swap for now.
Cold air intake and long tube headers would be a good start.
----------------------------
One question about the ECU.
If we buy the 19258270-GMPP LS3 Controller kit LS376/430.
contains pre-programmed ECU.
Is it possible to reprogram this ECU, if we decide to replace the camshaft to get the 500+HP?
Mike.
I think we wait with the camshaft swap for now.
Cold air intake and long tube headers would be a good start.
----------------------------
One question about the ECU.
If we buy the 19258270-GMPP LS3 Controller kit LS376/430.
contains pre-programmed ECU.
Is it possible to reprogram this ECU, if we decide to replace the camshaft to get the 500+HP?
Mike.