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OK, a fair request.
He stated that his requirement was 12:1 and the heads where not yet received, just ordered.
I too would use a flat top piston of possible AND fit "piston oil jets" from the block main area.
The "range" of compression choices IS affected by "local" E-85, the "E" content.
That is the main reason for a direction to try and find E-95 a more regulated fuel.
Thanks for the explanation, Lance. I agree that a more regulated/consistent fuel would be greatly beneficial to an effort such as this. And if he was using E95 for this, I would say 12:1 compression would probably be optimal, which sounds insane when considering twin turbos. Either way, definitely going to need a custom cam to keep the dynamic compression in check.
RonStoppable, those heads do look nice. This thing is going to be a freaking beast. I hope you have an adjustable suspension and the full compliment of traction goodies, because upwards of 1000+rwhp is going to roast those 275's right off the rims.
12:1 is insane.. IMO unnecessary but not my car. I see where you decided on 10.8. Much better choice. My buddy's Vette (9.5:1 427 LSX block twin precision 66/67's made 1097 on 9lbs with only 15* on E98) hell the motor can probably hold 40lbs.. a lot of power being thrown around these days.
One thing to consider, no matter how good it performs down low it's gonna feel like a pig compared to when it's in boost. Just the nature of a turbo car. I say the happy medium would be 11-1 which should be pretty snappy out of boost. I wouldn't give up that safety net for the small gains above that.
"Pig" "nature of turbo car" it's a 427 not a 4.8l junk yard motor.
That is a sick looking setup! Are those Ebay headers with the CX racing 90's on them? If so they worked really well with my twin 66 setup in the Camaro.
Should've just made a build thread lol
a few pics of my cable drive fuel setup, all from AEI. I also have a badass nice tubular core support, Griffin radiator already has the fittings welded up for the Remote electric waterpump. Truck will also be getting 4-linked aswell haha after a lot of thinking
powdercoated the Upper HOLLEY plenum aswell 😎
12-05-2016 | 10:39 AM
E Content of E-85 
