F2 408 E85, what CR??
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Teching In
Joined: Apr 2009
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From: cold spring ky
F2 408 E85, what CR?? Time to order pistons to finish the long block and i Need help deciding on what compression ratio to go with for my set up?
408 all forged
Mast CNC LS3 64cc
F2 procharger, cog drive
E85
This is our First build with e85 so its kinda new to us. Ill be running 25-38psi depending on the pulley. Any help is greatly appreciated.
408 all forged
Mast CNC LS3 64cc
F2 procharger, cog drive
E85
This is our First build with e85 so its kinda new to us. Ill be running 25-38psi depending on the pulley. Any help is greatly appreciated.
What block? 4 bolt or 6? Even though it will be big boost I still wouldn't go much below 9.0:1 Don't think e85 will get ya anywhere near 40psi though. You'll prob need to look at e99 minimum or C16.
It all depends on what your max boost target is. Since you are going to run an F2 with a 6 bolt block I'm assuming you are going to push 25-30psi+. In that case I'm not sure what E85 will support. Some of the hard core guys on Yellowbullet might be able to help more.
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To be clear I also run a 3 nozzle methanol system, one nozzle being pre compressor... We have tried so many different combinations to my setup since the first time we went F.I. with it back in 2005, this is the 10th iteration...
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E85 has been pushed to 30psi without an intercooler on many big block applications, and well over 30psi in the supra community, 30 seems dooable, 38psi, you might be the first LS guy in that territory on E85.
Mr Big do you have any problems pushing water/lifting heads? Is it a standard MLS gasket or a O-Ringed setup? I'm just wondering how far I can push her and what boost level she will take before she pushes water. To the OP on E-85 I would aim for a 10.1:1. It leaves you a decent amount of room for max boost but will also be nice down low. Not that its relevant but what car is it going in? That will make for a nice combo!
Thread Starter
Teching In
Joined: Apr 2009
Posts: 31
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From: cold spring ky
im running a o-ring block but dont know more since its not complete yet. but would you think meth would get it to 38psi??? im really not trying to run more than 30 but just a question in theory.