Drop in pistons question

mcr98 · 03-13-2020, 08:00 AM

Hey all , my current set up is lt1 , lt4 supercharger , tsp stage 3 cam with 32 percent lobe , Lt's , cai , stock pulley's , lt4 fueling , and circle d converter . I want to do drop in's , but on the the fence about c.r. do I go with 11.5 or the new 10.3 . I am also going to spray around 150 with a dedicated fuel system . I'd also like like to turn up the boost maybe 8 percent . It is a summer time daily and go to the strip a few times a year . Thanks in advance for your input and ideas .

KingLT1 · 03-13-2020, 10:04 AM

Keep the compression up if you have the Octane available(E50). If you are only going to run 93, then you might want to lower it but I think it would be fine with a cam and 11psi since the cam will bleed off some dynamic compression.

Fwiw, there is a local C7Z that is FBO with a fuel system. Made 660whp on E60 @ 11psi. Added a 100 shot and made over 840whp. The Nitrous makes the boost quite a bit more efficient so the gains compound much differently then on a NA application. You might already know this but I figured that I would mention it for anybody reading that does not.

mcr98 · 03-13-2020, 10:43 AM

Thanks king , I knew you'd respond . I should have noted I do run 93 . I know the nitrous will respond well . I just figured I have an opportunity to get it as good as I can . Right now I'm way down on timing , 17 ish if recall and the cam didn't seem to bleed off as much boost as I thought it would . I was hoping with a little less c.r. I could put a little more timing , or not have to pull as much with spray . I don't have e85 within 100 miles from me

*Joshinator99* · 03-13-2020, 12:42 PM

Quote:

Originally Posted by mcr98

Thanks king , I knew you'd respond . I should have noted I do run 93 . I know the nitrous will respond well . I just figured I have an opportunity to get it as good as I can . Right now I'm way down on timing , 17 ish if recall and the cam didn't seem to bleed off as much boost as I thought it would . I was hoping with a little less c.r. I could put a little more timing , or not have to pull as much with spray . I don't have e85 within 100 miles from me

If you can't run E, I'd drop the compression for sure. I suppose you could run meth, but I'm not a fan of relying on that.

03-13-2020, 08:00 AM	#1
mcr98 Drives: 2018 camaro 2ss redline Join Date: Nov 2015 Location: new hampshire Posts: 39	Drop in pistons question Hey all , my current set up is lt1 , lt4 supercharger , tsp stage 3 cam with 32 percent lobe , Lt's , cai , stock pulley's , lt4 fueling , and circle d converter . I want to do drop in's , but on the the fence about c.r. do I go with 11.5 or the new 10.3 . I am also going to spray around 150 with a dedicated fuel system . I'd also like like to turn up the boost maybe 8 percent . It is a summer time daily and go to the strip a few times a year . Thanks in advance for your input and ideas .

03-13-2020, 10:04 AM	#2
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 7,661	Keep the compression up if you have the Octane available(E50). If you are only going to run 93, then you might want to lower it but I think it would be fine with a cam and 11psi since the cam will bleed off some dynamic compression. Fwiw, there is a local C7Z that is FBO with a fuel system. Made 660whp on E60 @ 11psi. Added a 100 shot and made over 840whp. The Nitrous makes the boost quite a bit more efficient so the gains compound much differently then on a NA application. You might already know this but I figured that I would mention it for anybody reading that does not. __________________ 2016 NFG SS A8/Whipple 2.9/Fuel System/Flex Fuel

03-13-2020, 10:43 AM	#3
mcr98 Drives: 2018 camaro 2ss redline Join Date: Nov 2015 Location: new hampshire Posts: 39	Thanks king , I knew you'd respond . I should have noted I do run 93 . I know the nitrous will respond well . I just figured I have an opportunity to get it as good as I can . Right now I'm way down on timing , 17 ish if recall and the cam didn't seem to bleed off as much boost as I thought it would . I was hoping with a little less c.r. I could put a little more timing , or not have to pull as much with spray . I don't have e85 within 100 miles from me

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