interesting to see the powerband, only making 200hp/ftlb until ~5200rpm. what manifold and turbine housing are you using? tq dropping off like that is usually indicitive of high backpressure which could be solved with a larger turbine housing, but with the repurcussion of later spool.

 

I am sure you meant to say "burn 2x times faster than the regular gas". If so, E-85 burns about 30% quicker. However, most people who use E-85 don't care about fuel consumption--they are looking for a cheap high octane fuel. E-85 is ~104-105 octane and costs ~$2/gallon. C16 is ~117 octane but costs ~$14/gallon. Unless somebody is going for a power record, or doesn't have immediate access to E-85, E-85 is a no brainer for those looking to make big power at a very reasonable price.

 

i was asking same question after we tuned it.
here is what i found so far
-compression is 160 all the way across (i believe it might be because of head porting?)
-i have small intercooler so that might cause boost to drop 4 psi?
-i found small boost leak around throttle body
-i was using low spring so that might cause it too

the manifold im using is lovefab minime with the t4-t3 adaptor on top of it. never had torque drop off like that with other turbos but than again i never turned up my boost to 30 psi...

 

Exactly. On top of that, you can build your motor for slightly higher compressor and make more power at the same boost and use less fuel.

 

You need more e-85 to burn then regular petrol though. Which is why most if not all people running e85 on high boost platforms upgrade the entire fuel system setup.

 

There are some exceptions. You can make 400whp a couple different ways. You can up the boost which requires more air, or you can bump the compression ratio which requires higher octane. If you up the compression ratio, you could boost less and still make 400whp, and you would also save fuel.

Most guys dont usually take the second route, but its always an option.

 

There is a third variable--timing. With E-85 you can run a lot more timing than you could with 91 or 93 octane. Timing by itself can make big power increases.

 

ahh that makes sense. the short runner manifold will generally have higher backpressure, so that combined with your boost leak are likely to be the cause for your tq dropoff. fix the boost leak, get a better FMIC, and then maybe a turbo manifold with longer runners

 

would it be better to get a bigger turbine housing, or a new manifold with longer runners. Either way spool should take longer, no?

 

Anyone else have any information on the 6262? I am wondering what it would spool at on a log manifold.