Power adder opinions..
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Intermediate
Joined: Dec 2019
Posts: 47
Likes: 0
From: 616,Michigan
Power adder opinions..
So I bought a heavily built N/A car . Everything has been done to it . Nothing spared . My only dilemma is ,I want more power. The car is built for boost but I won’t be ready for boost for quite sometime. The wallet don’t agree right now . Would it be better to raise my compression with new pistons and nitrous it ? or do a budget but semi quality rear mount turbo ? The engine is already out of the car for some other maintenance ,so I either put higher compression pistons in it w/ N20 or just bite the bullet and boost it . Block is sleeved and I run LS7 heads. It makes a tad under 600whp with about a 10:1 CR ( give or take )
all opinions considered and welcome
all opinions considered and welcome
Last edited by Electron447; Dec 30, 2019 at 05:54 PM. Reason: Spell-check
Melting Slicks
Joined: Oct 2002
Posts: 2,515
Likes: 441
From: Arizona
So I bought a heavily built N/A car . Everything has been done to it . Nothing spared . My only dilemma is ,I want more power. The car is built for boost but I won’t be ready for boost for quite sometime. The wallet don’t agree right now . Would it be better to raise my compression with new pistons and nitrous it ? or do a budget but semi quality rear mount turbo ? The engine is already out of the car for some other maintenance ,so I either put higher compression pistons in it w/ N20 or just bite the bullet and boost it . Block is sleeved and I run LS7 heads. It makes a tad under 600whp with about a 10:1 CR ( give or take )
all opinions considered and welcome
all opinions considered and welcome
Burning Brakes
Joined: Feb 2019
Posts: 1,028
Likes: 377
From: SW Ohio
Having owned 2 FI cars, there are a blast to drive. They are also easier on the drivetrain, depending on how you stage your nitrous.
The bottle is there cheaper and easier option for sure, but damn turbo and supercharged cars are fun.
The bottle is there cheaper and easier option for sure, but damn turbo and supercharged cars are fun.
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 588
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Lots of boosted cars running around at 10.0:1 or even somewhat higher. It’s all in the tune. And good fuel, of course. E85 makes it better.
Burning Brakes
Joined: Feb 2019
Posts: 1,028
Likes: 377
From: SW Ohio
I ran 7 lbs of boost with 10:1 on a modular motor and was on the edge of detonation with a tune by one of the best in the ford game. If you can get down to 8.5:1 or 9:1 max, you can push the limits a bit more honestly. And if your down that far in the motor o-ring the block and all of the sudden 12, 15, or more pounds gets real comfortable.
and hell yes to the E85 suggestion.
and hell yes to the E85 suggestion.
Last edited by CinciZ06; Jan 1, 2020 at 01:12 AM.
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 588
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
We have a car running 10.5:1 on E85 making 26+lbs on a 377" LSA block.
Can't compare the Mod motor and an LS. I'd never suggest going below 10:1 on an LS boosted combo.
Can't compare the Mod motor and an LS. I'd never suggest going below 10:1 on an LS boosted combo.
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Burning Brakes
Joined: Feb 2019
Posts: 1,028
Likes: 377
From: SW Ohio
OP, here is a bunch of reading on Forced Induction to help steer you in the right direction.
https://www.rpmoutlet.com/boost-comp...atio-chart.htm
https://www.procharger.com/basic-engine-building-specs
https://ls1tech.com/forums/forced-in...-question.html
https://www.streetmusclemag.com/tech...rtech-your-ls/
https://www.superchargerforums.com/t...mum-boost.628/
And lastly, SA Designs has a great book selection and this may be a great read.
https://www.cartechbooks.com/how-to-...s-engines.html
AMP Racing
Joined: Aug 2006
Posts: 10,753
Likes: 588
From: Washington TWP NJ
2023 C5 of the Year Finalist - Modified
2017 C5 of Year Finalist
St. Jude Donor '09-'10-'11-'12
Well, It's not a race engine... It's a street car that sees somewhere around 5000 miles a year, as well as several hundred passes.
But, you're right in that the LS is nothing special... It's just an air pump, like any other internal combustion engine. It just does it better then any other manufacturer...
Still, even on pump gas, I wouldn't put together a power adder LS engine at anything less than 10:1 Good gas, good tuning, and meth - if needed.
Some good reading you've posted...
But, you're right in that the LS is nothing special... It's just an air pump, like any other internal combustion engine. It just does it better then any other manufacturer...
Still, even on pump gas, I wouldn't put together a power adder LS engine at anything less than 10:1 Good gas, good tuning, and meth - if needed.
Some good reading you've posted...