e-85 compression questions

kennydawgg · 04-22-2008

Ok I have been doing some searching and I need some input.

My motor is in pieces now and I have various components from different motors and I need something to work.

THe block I have has no oil squirters and it came with a 7 bolt crank. My buddy says its a non turbo motor and the pistons it came with are 9:1 compression. I was searching around for some other pistons and whatnot and I came upon a thread where they said 9:1 is good for people using E-85, anyone have any though about this? I have a 16g from an evo that I am going to use and 510 injectors. I also have an e-manage and datalogger for electronics.

Anyone have any input on what pistons I can use to get this thing running or what I would need to use e-85? I know I would need new injectors to use the e-85 and probably a bigger fuel pump, I just wonder if it is more reasonable to use the money I would spend on different comp. pistons to convert to e-85.

just some lingering thoughts that could use some input. thanks

**Shane@DBPerformance** · 04-22-2008

Are they aftermarket pistons? 9:1 should work fine with E85, but if they are a factory piston, they still might break even though they aren't that high of compression.

**scheides** · 04-22-2008

Lucas English is running an aluminum rod motor with 10:1 pistons on e85 and making record numbers on a stock IX turbo. As long as they are decent aftermarket pistons, there's no reason why 9:1 wouldn't work awesome on e85, or pump gas for that matter. What are you going to use to tune the thing?

TkrPerformance · 04-22-2008

craigs car has 9:1 in it

**Goat Blower** · 04-22-2008

The compression ratio is no big deal. Shane's pointing out that if they're stock pistons, they might be of a lesser material than the factory turbo pistons, hence not able to take much boost.

kennydawgg · 04-22-2008

yeah there stockers. I was looking for more info on them and i ran the numbers on the top (63dTf1) and everything I see says that they are 2g turbo pistons which would be the 8.5 to 1s. anyone know if the na pistons had the same marks?

I have an e-manage that I am gonna use for tuning. but I have no wideband probably should look for one. .

**Goat Blower** · 04-23-2008

Let 'er buck and don't worry about the pistons until they break.