What turbo for 93 octane pump gas?

[EagleTalonTim]

Well, It is time for me to go bigger! I currently have an EVO III 16g running 20psi on 93 octane with 650 injectors. Other mods include : FMIC, 2.5" exhaust, rewired Walbro 255 Fuel Pump, Fuel Lab 1:1 AFPR, 2g MAF conversion, and EEPROM ECU from DSMchips.com programmed to anything I need

Here is what I want to know. I am limited to strictly 93 octane in my area. I have searched all around my town for anyone who has E85 and had no luck. What is good size turbo to use with 93 octane that does not heat up as fast as the 16g does. I like to pass people alot so I constantly have my foot stomped on the gas going to work since the road I take is a 2 lane road for 20 miles. The problem I am running into is that after very little hard driving, I can tell I am losing power since the engine bay is hotter. I am not that worried about lag since most of my need for power is at the top end. Any ideas are welcome as well as possible Injector size to match with the turbo. My future goal is 400hp running just pump gas. No meth injection or nitrous.

 

[dsm-onster]

Hx40 all the way.

But really, you should just fab a real a cold air intake if your engine bay temps are holding you back.

Regardless, for pumpgas you need a turbo that likes boost and can deal with making power with not that much timing and/or high compression ratio. Comapring compressor maps between the turbos with a large enough turbine to net your goal on pumpgas clearly puts the hx40 in the front. It can be 'bolt on' too nad have more than enough turbine for your goal.

 

[EagleTalonTim]

It really is not my engine bay temps. I guess the thing I should have said is the intake temp rises from the hot side of the turbo alot after boosting quite a bit. The logs only show the intake temp from the MAF only rising about 2 or 3 degrees after boosting. Average intake temps right now is about 72º since it is so cold out recently. Is there a site I could buy a whole turbo set up with the manifold, oil pipes, intake connection to my FMIC, and exhaust side stuff? I worry about buying parts and they don't fit

 

[Yngvar]

I would get a fmic

 

[mitsubishi9908]

I would get a fmic

agreed, it is time.

 

[dsm-onster]

WTF He already has one. FIRST listed mod.

It really is not my engine bay temps. I guess the thing I should have said is the intake temp rises from the hot side of the turbo alot after boosting quite a bit. The logs only show the intake temp from the MAF only rising about 2 or 3 degrees after boosting. Average intake temps right now is about 72º since it is so cold out recently. Is there a site I could buy a whole turbo set up with the manifold, oil pipes, intake connection to my FMIC, and exhaust side stuff? I worry about buying parts and they don't fit

Well. I can tell you exactly what your temp is. What are you flowing in lb/min? I'll tell you now this is a trap question. There's no way you're out of decent efficiency with the evo3 16g with a stock long block and only 20psi boost at a stock redline.
I've run more boost with pump gas and a small 16g with an ebay FMIC using link ("programmed to anything I need").

A logger and a compressor map will give you all you need to change your mind.

 

[Demon33]

WTF He already has one. FIRST listed mod.



Well. I can tell you exactly what your temp is. What are you flowing in lb/min? I'll tell you now this is a trap question. There's no way you're out of decent efficiency with the evo3 16g with a stock long block and only 20psi boost at a stock redline.
I've run more boost with pump gas and a small 16g with an ebay FMIC using link ("programmed to anything I need").

A logger and a compressor map will give you all you need to change your mind.

+1
There is definitely more in your setup past 20 psi. I run my e316g to 26 psi on 91 octane and a supra sidemount. Of course the meth injection helps!

 

[EagleTalonTim]

Well, i am a little worried about turning up my boost at the moment since I have a stock head gasket and stock head bolts that came with my motor from Japan. I have read on here that going over 20psi on a stock head gasket and stock head bolts can cause serious problems. I currently do not have any problems with knock unless I heat the turbo up driving hard for a minute or so.

 

[Demon33]

Well, i am a little worried about turning up my boost at the moment since I have a stock head gasket and stock head bolts that came with my motor from Japan. I have read on here that going over 20psi on a stock head gasket and stock head bolts can cause serious problems. I currently do not have any problems with knock unless I heat the turbo up driving hard for a minute or so.

Not true, to a point. I run 26 psi on the stock OEM head gasket and head bolts on a stock bottom end with 165,00 original miles on it. Haven't lifted the head or pushed a drop of coolant yet and the head bolts have been reused once.

At the top of 3rd I'm seeing 19 degrees of timing, 11.5 AFR and about 850 degrees C on the EGT with zero knock all on 91 octane and 50% methanol. I actually think that there's more potential power with my setup, but I'm pretty happy where it is, as it's my daily driver after all.

Boost doesn't kill motors. Bad tunes do. If you don't have a way to monitor knock, get a data logger. You'll be able to see when you're approaching the limits of your tune as knock counts increase. This will tell you if you can increase the boost or if you have to lower it (or the ignition timing).

I think you should really try to max this turbo out before you think about getting a bigger one. Because if you're not planning on boosting past 20 PSI, a larger trubo won't gain you that much and you'll have more lag. I feel the e316g is right at home up to about 25 or so PSI on pump gas. It really is a great street turbo.

 

[slowgsr]

a small frame s200 series bw turbo for 400hp. If you were looking for a bit more maybe 500 (stock engine), id go with the s259, great pump gas turbo.