turbo SHO vs E85 compression

[Siman]

It all depends on the turbo/SC selection, Intercooler, fuel choice. I take it since you are going to be running different fuel you’re going to be changing the MAP around every time. So make sure to look out for seasonal ethanol swing at the gas stations. Also have encountered a problem with bad E85, containers or the hose they use to transfer the fuel can be wrong. You end up with fiberglass in your fuel system so watch out for bad stations; it’s referred to as "the black goo".

If you’re running E85 you can boost to the moon on any compression ratio. I’ve seen 13:1 comp ratio on a 3000GT @ 30PSI, blew the head gasket during the second run though.

Since you’re going to be switching maps, keep it in the area of 9-9.5:1. You’re going to need bigger injectors for the E85, I don’t know how much bigger off the top of my head. More than likely a bigger pump, I recommend Aeromotive's Stealth pump. If you use a big air to air intercooler (4-6 inch thick 20 inch long and about 10 inch top to bottom) you should be able to push 16 PSI with 9.5:1 on pump gas. If you run E85 with 9.5:1 you should be able to push upwards of 30 PSI till you blow the engine. But to do the later you’re going to need a much higher press fuel pump like Aeromotive's Eliminator. I also recommend you get a dry sump system, new piston sleeves, external water pump, cams, extreme retard on the timing, a few extra engines with the same stuff, transmissions, really anything to solve anything that can go wrong, because it will.

yes I know this was a post from forever ago just saw it in a google pop up...when looking for alternative SHO fuel stuff and just wanted to drop my comment.

 

[yamahaSHO]

It all depends on the turbo/SC selection, Intercooler, fuel choice. I take it since you are going to be running different fuel you’re going to be changing the MAP around every time. So make sure to look out for seasonal ethanol swing at the gas stations. Also have encountered a problem with bad E85, containers or the hose they use to transfer the fuel can be wrong. You end up with fiberglass in your fuel system so watch out for bad stations; it’s referred to as "the black goo".

Most of the black goo I've heard/seen comes from prior contaminates in the vehicle's fuel system.

As far as maps, a *safe* street tune should account for the different blends of E85. Between a safe E85 tune and a gas tune, I would have a separate performance/track tune if getting a good ET is priority.

If you’re running E85 you can boost to the moon on any compression ratio. I’ve seen 13:1 comp ratio on a 3000GT @ 30PSI, blew the head gasket during the second run though.

Since you’re going to be switching maps, keep it in the area of 9-9.5:1. You’re going to need bigger injectors for the E85, I don’t know how much bigger off the top of my head. More than likely a bigger pump, I recommend Aeromotive's Stealth pump.

Since E85 still isn't a standard at all gas stations, I would have to agree to stay under 10:1 compression. You'll need about 30% more injector for E85 (over gas) and ideally, if you're running big power, a Walbro 255 in tank feeding a surge tank with a Bosch 044 would be the safe way to go in terms of keep a good constant flow/pressure.

If you use a big air to air intercooler (4-6 inch thick 20 inch long and about 10 inch top to bottom) you should be able to push 16 PSI with 9.5:1 on pump gas. If you run E85 with 9.5:1 you should be able to push upwards of 30 PSI till you blow the engine.

30 PSI on E85 would spin any gear. 20 PSI on E85 with a good tune will probably get you more power than any SHO here has.

But to do the later you’re going to need a much higher press fuel pump like Aeromotive's Eliminator. I also recommend you get a dry sump system, new piston sleeves, external water pump, cams, extreme retard on the timing, a few extra engines with the same stuff, transmissions, really anything to solve anything that can go wrong, because it will.

Too much information there I wouldn't take note of.

 

[AREA 91]

Well I am. Do I get to play in this sand box? I'm oly 16 hundredths away from the 11's now and if can grow these balls big enough to turn on the nitrous again, I should be deep in the 11's.

Tom

Remember Tom, I have my Super Comp license! Certified for single digits!

 

[Siman]

Most of the black goo I've heard/seen comes from prior conaminates in the vehicle's fuel system.

I’ve seen it come from the pump too, black lining in the fuel tank.

As far as maps, a *safe* street tune should account for the different blends of E85. Between a safe E85 tune and a gas tune, I would have a separate performance/track tune if getting a good ET is priority.

Just depends on conditions most are fine if you don’t turn up the boost. But to play it safe we run different maps for the different blends of E85. I have seen the meter swing from E68 to E87 in some cases. Best would be to mix your own or get barrels of whatever you want.

Since E85 still isn't a standard at all gas stations, I would have to agree to stay under 10:1 compression. You'll need about 30% more injector for E85 (over gas) and ideally, if you're running big power, a Walbro 255 in tank feeding a surge tank with a Bosch 044 would be the safe way to go in terms of keep a good constant flow/pressure.

We are blessed around here in Wichita, there are 3 or 4 stations to get it. There are a few places to get racing gas as well happily there is one literally down the street from my house. Have worked with surge tanks but that’s more money than what is needed, would need 2-3 pumps for that. I prefer to go a little bit over what is needed for fuel, better to have more than not enough. To make the power that we are producing from the EVO we have to run two Aeromotive stealth pumps.

 

[yamahaSHO]

Just depends on conditions most are fine if you don’t turn up the boost. But to play it safe we run different maps for the different blends of E85. I have seen the meter swing from E68 to E87 in some cases. Best would be to mix your own or get barrels of whatever you want.

With that swing, I wouldn't hesitate with one *safe* tune. I don't worry too much about winter stuff as my STi sleeps in the winter.

We are blessed around here in Wichita, there are 3 or 4 stations to get it. There are a few places to get racing gas as well happily there is one literally down the street from my house. Have worked with surge tanks but that’s more money than what is needed, would need 2-3 pumps for that. I prefer to go a little bit over what is needed for fuel, better to have more than not enough. To make the power that we are producing from the EVO we have to run two Aeromotive stealth pumps.

We've got quite a few E85 stations around here too, but if I move in the next year to where I'm looking, it may become harder. If I were to convert the SHO to E85, I would run two pumps regardless of a surge tank or not.


How much power are you producing with the EVO. I know Chris is making good power in their EVO (35 PSI, E85, built motor, cams, bigger turbo, etc), but IIRC, they're running one big in-tank pump.

 

[Siman]

The EVO normally stays inside but we drive it when we can. The EVO is pushing about 650 on wastegate, and 750+ @ 30. But we don’t fully know because the nearest AWD dyno is in KC. Kind of guessing at the numbers but it’s the 4th fastest street car as is around here; next to a Twin turbo S2K, a 3000GT (that is stupid BTW), and a Porsche GT2. We have an AMS 2.3RR motor, Shepherd driveline, and a BorgWarner EFR or Garrett GTX42 Turbo on the way. Haven’t decided on the turbo yet, but should get us in the area of 900-1000HP. But between the MR2, M3, and EVO it’s stretched a little thin.

I had a quick question BTW, Ive always noticed the STI has that top mount intercooler thing how bad does it heatsoke? I try to ask around here but my friends foot normaly makes it to ware they dont talk to me anymore...The EVO and STI rivalry doesnt help either...