Thanks for the info, its great.

 

not to get off subject but power under the curve is where the turbo on FSAE cars come in the point of the restrictor is so you don't make any more power but the point you send the restrictor sonic is sooner with a turbo. and with the turbo you can make way more tq.

But anyway i love E85 as a fuel and wal-mart is talking about putting pumps in so that will help with fuel stations.

 

Another update:

My 780 cc injectors are MAXED OUT. I'm holding ~24.6 psi at 7600 RPM and my IDC from Mitsulogger are at 113% at lambda 0.895 (Gas equiv of 13.2:1). I'm going to turn the boost down a little until I get some larger injectors. Anyone considering making the switch, I'd recommend going with at least 850 cc.

-Paul

 

When switching to E85 you are adding 30% more fuel for equivalent AFR's so it would be a minimum of 720's for a STOCK car. OF course any mod that you do has that much less give before larger injectors are needed and if you are seeing IDC like that even with 780's, my idea of 1150's probably isnt too far off for an upgraded turbo.

 

UPDATE:

Well, I finally got some larger injectors so I'll be able to push the boost a bit more and see how the car responds. Unfortunately, I discovered a hole in my catback so I've got the stock cat back on the car again. It looks like I may be down about 30 or 40 ft-lbs of torque due to that.

Gas mileage is down to about 15-16 mpg, which isn't too bad considering I was getting 19-22 mpg on gasoline. I think if I could keep the car out of boost I could do better, but with all this new power it's hard to do.

Overall I'm pretty happy with the switch.

-Paul

 

This is good to hear i am going to switch my DSM over and i already have my honda running on it. But i want to keep the War. on the EVO.

 

Paul with the 1000's what type of IDC and AFR's are you seeing now?

 

I'm still getting everything adjusted for the new injectors, but earlier tonight I saw 85% IDC at the gas equivalent of 11:1 at 7000 RPM. I'm targeting a gas equivalent of 12.5:1, so I still have a lot of fuel to take out. Although my boost is a bit lower than I plan on putting it as well. I should have better data by the middle of next week.

-Paul

 

Does the exhaust smell any different? I know when I run 110 leaded I smell a sweet bleach like scent.

 

i agree you can choke the restrictor with the FSAE car faster with the turbo. there is no question about that. but is it worth all the problems a turbo car has, just to make it so you shift a few times less? i mean, our shifting is so fast it is almost not even noticable. and unless you dry sump the engine with a turbo, you will certainly kill the turbo quickly with the retarded throttlebody positioning rules. we went through 3, and followed all the recommendations including a few "Secret" ideas. none- of which made any difference whatsoever.

only time i would consider the turbo useful is if the NA engine cannot choke the restrictor on its own. i.e. smaller displacement engines. we used the CBR 250, but have also used a CBR 450, and other teams turbo or supercharge a single cylinder 450. the teams with the turbo 600's don't perform any better then the NA 600's. just look at A&M in 05... NA 600 clobbered everyone at acceleration. even cornell with the drysumped turbo 600.

 

smells like tiquela on our race car. hahaha.

 

It's definitely a different smell. I prefer it to the small of catless gasoline exhaust.

-Paul

 

So I've decided to convert my EvoVIII over to E85 this summer using the stock turbo (05MR16g) and want to ask from your experience what size injectors to run? I'm guessing 780's to 1000cc. Also, I would guess the Walbro 255 would be enough pump?

 

It really depends.. But 780's are more than adequate for a conversion on a stock turbo.. 1000's are somewhat overkill, but if you plan on going to a bigger turbo at some point and still use E85 without a dual pump setup.

I do know on my 35R that being able to make the most out of the turbo, means running quite a bit more boost than typically capable on 93 octane, so I would have to run dual pumps with 1000cc injectors on E85..

Using the Walbro, or Dave Buschur's upgraded pump, will do the job.

 

FWIW, Its all about stepping up to the game, once E85 hits, your going to see alot of supercharged and turbocharged vehicles making monster horsepower on inexpensive fuel..

I built my Malibu (which is supercharged) with the expectation of using E85, The car already produces 650whp on 93 octane pump, imagine running 20psi of boost on that car (I'm running 7psi now) We're estimating over 1000whp on that car when the time comes, but an EFI conversion needs to be done first.