what compression with e85

[sabotage]

Building a teksid fully built block for my 03 cobra, still going to use my cobra crank and rods with arp 2000 Bolts. Was going to buy a set of nice pistons that were on the market but it didn't happen. So today I want to order my pistons but still debating on what brand and COMPRESSION RATIO TO RUN WHAT DO YOU GUYS RECOMMEND?
Its a whipple 3.4 going to bump the boost to about 26psi
Fuel system is plenty big for e85 and I dont ever plan on using much of our shitty pump gas we have here In CALIFORNIA.
MY cousin is trying to get me to go with 10.1 but I feel like its crazy. ...he runs 11.1 on his e85 800hp Honda. ..lol..

 

[04SilverSerpent]

I can't say what that the magic number is, but I also have a Teksid block in my 04 and I'm running 9 to 1 w/e85. I can't really turn up the boost because I don't have enough injector to support the fuel demands of e85

 

[bambinov8]

10:1 all day.. Call diamond pistons for them to make a custom one.. You will pick 50-60whp by going 10:1

 

[sabotage]

THANKS GUYS ...well I stayed in the middle went with a 9.5 to 1 lets see how it works....

 

[50q's]

At least 10 to 1, Dan schoenick not sure how to spell the last name. Has a Ford gt with 10 to 1 and f2 with e85. The gas actually tested 77, and made 1400. At least 10 to 1 if not 11 to 1.

 

[AntiHeightPunk]

im going 10.8:1 on my turbo cobra....i can turn the boost up/down i cant turn the compression up or down

 

[MICLO50]

i wish i would have went higher than my 9.0:1 :bash:

 

[sabotage]

i wish i would have went higher than my 9.0:1 :bash:

lol really what compression would you have gone with?

 

[gabe1530]

if i could run e85 all the time, i would bump my compression to 11:1. i want to be able to take it on trip without worrying about finding my next station so i went with 9:1.

 

[MICLO50]

lol really what compression would you have gone with?

i went with 9.0:1..knowing im probably never going to run anything other then E85 i could have went with at least 10.0:1, oh well.

 

[95YellowGTBeast]

10.5:1 and 30psi that is what I am going to do.

 

[bambinov8]

i went with 9.0:1..knowing im probably never going to run anything other then E85 i could have went higher, oh well.

That was my thinking also when i did my motor, me : 'oh I don'think im gona run E85 all the time.. ' lol I lied to myself. Shouldve went 10:1 oke:

 

[Carbd86GT]

We went 11:1 in our 2013 GT500, and that's what I would do if I was building a dedicated E85 motor.

11:1, 4.0L whipple, 24 psi = a lot of power!

 

[VenomSVT03]

My motor is 9.7:1 right now, next time i build it (which i hope is not anytime soon) will be 10.5:1

 

[Turbo98]

I'd like to see a back to back dyno with low and high compression. When I researched it a while back, the compression didn't make as much difference as I thought.

 

[Z06KILLR]

:dancenana:11.5:1

Building a teksid fully built block for my 03 cobra, still going to use my cobra crank and rods with arp 2000 Bolts. Was going to buy a set of nice pistons that were on the market but it didn't happen. So today I want to order my pistons but still debating on what brand and COMPRESSION RATIO TO RUN WHAT DO YOU GUYS RECOMMEND?
Its a whipple 3.4 going to bump the boost to about 26psi
Fuel system is plenty big for e85 and I dont ever plan on using much of our shitty pump gas we have here In CALIFORNIA.
MY cousin is trying to get me to go with 10.1 but I feel like its crazy. ...he runs 11.1 on his e85 800hp Honda. ..lol..

 

[badbiach]

:dancenana:11.5:1

So, the high compression Aluminator is 11:1, and my stock engine is 11:1. Would it be that bad to run the high compression 11:1 Aluminator with say E85 and 15lbs of boost, then if I get stuck with 91 octane somewhere, just turn it back down to low boost settings and the 91 tune? In other words, can I get by with the 11:1 Aluminator if I plan on running E85 on anything more than 5-8 lbs?