High compression l77 for 91/e85
Thread Starter
Teching In
Joined: Sep 2020
Posts: 4
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High compression l77 for 91/e85 Hey folks, this is my first LS build and would value your insight on my idea for a build. I have a 2014 caprice that I plan on being a daily driver that puts a smile on my face. The standard when searching goes intake, cam, headers, boost. I would like to go a little different route and go N/A with a factoryish appearance.
My idea: factory bore high static compression dome pistons with a lopey/overlap cam that gets dynamic compression where it needs to be and keep the peak under 7k where the ls3 valve train can keep up. Lt1 exhaust manifolds to factory camaro exhaust bits.
Stock pistons are 0cc flattop, heads are 70cc combustion chamber. Ideally I'd like to hone what I have and put new pistons on my existing con rods with arp hardware.
There has to be a reason I'm not finding others not doing this... what am I missing?
My idea: factory bore high static compression dome pistons with a lopey/overlap cam that gets dynamic compression where it needs to be and keep the peak under 7k where the ls3 valve train can keep up. Lt1 exhaust manifolds to factory camaro exhaust bits.
Stock pistons are 0cc flattop, heads are 70cc combustion chamber. Ideally I'd like to hone what I have and put new pistons on my existing con rods with arp hardware.
There has to be a reason I'm not finding others not doing this... what am I missing?
E85 for a non flex fuel vehicle is a big commitment, you’ll need fuel lines and fuel pump that is compatible, 30% bigger injectors than you would use otherwise. You can carefully run 11.6 static on 91 and 12:1 on 93, how much more static compression would you need?
Thread Starter
Teching In
Joined: Sep 2020
Posts: 4
Likes: 0
The caprice is flexfuel otherwise it wouldnt be on my radar. Thinking a compromise between a 91 tune with retarded timing and a e85 tune that rips... but I have no experience with e85 so input is appreciated
