Can I supercharge mi high compression engine.
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Joined: Aug 2017
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Can I supercharge mi high compression engine. So I brought a car and didn't do enough research prior to getting it.
LS2 with a hs108d kelford cam Heads have been skimmed to raise compression to 11-1. Build sheet also tells me pistons have been skimmed to allow valve clearance. Currently at 494.8 rwhp
I have been told it's pointless putting a blower on it as minimal boost can be made and risk completely destroying it on 98 pump gas.
option 1 would be to start again with new heads and possibly pistons to be able to lower compression
Option 2 is to buy a engine and build from scratch.
What are your thought. Can I work with what I have , change some parts. Or start over
LS2 with a hs108d kelford cam Heads have been skimmed to raise compression to 11-1. Build sheet also tells me pistons have been skimmed to allow valve clearance. Currently at 494.8 rwhp
I have been told it's pointless putting a blower on it as minimal boost can be made and risk completely destroying it on 98 pump gas.
option 1 would be to start again with new heads and possibly pistons to be able to lower compression
Option 2 is to buy a engine and build from scratch.
What are your thought. Can I work with what I have , change some parts. Or start over
There is not enough info here to properly answer the question I.e. Goals & use. Specs on the cam etc..
However, I can say that many people here have boosted high compression builds. The tuning capabilities of today compared to the old school thought of low cr & high boost are a thing of the past.
My previous build was an LS2 w/ 11:1 cr. @ 9lbs. Tuned conservatively it made about 575/550. If your goals are for a fun street car, then you are within reach. If your looking for a Max power build for the track then the you may want re think the position. The thinner decks on the heads would be a greater concern at high boost as well.
However, I can say that many people here have boosted high compression builds. The tuning capabilities of today compared to the old school thought of low cr & high boost are a thing of the past.
My previous build was an LS2 w/ 11:1 cr. @ 9lbs. Tuned conservatively it made about 575/550. If your goals are for a fun street car, then you are within reach. If your looking for a Max power build for the track then the you may want re think the position. The thinner decks on the heads would be a greater concern at high boost as well.
We have 101 and 103 pump gas all over down here in South Florida.......tons of airboats with aircraft engines that need it. Most stations out west of the city of it and a few right here in town do too.
You can also drive over to any airport in the USA and pump 101 directly into your car, or into gas tanks. $3.40/gal for 101 at the airport here right now......
But wouldn't E85 be just right for Dan Jones.......?
I'm planning on 18psi with my 10.8:1 cr iron block 390ci.....single turbo.
.
You can also drive over to any airport in the USA and pump 101 directly into your car, or into gas tanks. $3.40/gal for 101 at the airport here right now......
But wouldn't E85 be just right for Dan Jones.......?
I'm planning on 18psi with my 10.8:1 cr iron block 390ci.....single turbo.
.
Last edited by LS6427; Aug 22, 2017 at 02:33 AM.
So I brought a car and didn't do enough research prior to getting it.
LS2 with a hs108d kelford cam Heads have been skimmed to raise compression to 11-1. Build sheet also tells me pistons have been skimmed to allow valve clearance. Currently at 494.8 rwhp
I have been told it's pointless putting a blower on it as minimal boost can be made and risk completely destroying it on 98 pump gas.
option 1 would be to start again with new heads and possibly pistons to be able to lower compression
Option 2 is to buy a engine and build from scratch.
What are your thought. Can I work with what I have , change some parts. Or start over
LS2 with a hs108d kelford cam Heads have been skimmed to raise compression to 11-1. Build sheet also tells me pistons have been skimmed to allow valve clearance. Currently at 494.8 rwhp
I have been told it's pointless putting a blower on it as minimal boost can be made and risk completely destroying it on 98 pump gas.
option 1 would be to start again with new heads and possibly pistons to be able to lower compression
Option 2 is to buy a engine and build from scratch.
What are your thought. Can I work with what I have , change some parts. Or start over
How much boost do you want to make, what are your goals for the car? Bob
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ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
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Verdad Gallardo I agree. Bob
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ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
ATI ProCharger and Moser Sales 260 672-2076
PM's disabled, please e-mail me
E-mail: brutespeed@gmail.comob@brutespeed.com
https://brutespeed.com/ Link to website
You can add me too the list. LS1 11.1 comp, H/C/I with 100% meth injection. Currently at 10psi with the cats on it but hoping to see it down to 7-8 with the cats removed. Just make sure you run E85 or methanol and you will be good for awhile.
Most people only boost with that CR on pump gas if they are doing class limited racing or low compression street builds. You can get away with it on a centrifugal better than any other FI, because peak boost hits way past peak torque. However, your tuning window gets paper thin. In order to be worth doing it, you need to be skilled at tuning, or know someone who is, as well as being patient and attentive to what your engine is doing. If any one of those criteria don't fit you, don't do it. Otherwise, you end up with more blown motor diagnostic and repair skills than you ever wanted. That being said, more CR means better response all around, whether in boost or not, so I hope you do it.