Mijae007

I usually average 100-120 miles per full tank of E85. Whereas before on pump I would average 200 miles per full tank of gas. Cost is approx the same since E85 is cheaper but you're visiting the gas station more often.

s2000Junky

Gawd that's horrid. I drive my car long distance too often to deal with fill ups every 100 miles. Another good benefit of water/meth injection and pump.

DavidNJ

Which an issue depending on the length of the trip and availability of fuel. We don't have E85 in NJ.

However, that is another big advantage of a turbocharged engine, especially if the compression is in check. With a turbo, the boost can be reduced to allow the use of pump gas and increased to take advantage of E85. Now if only SOS or Ptuning sold their manifolds as a divided T4 for IWG (no WG on the manifold) that would allow twin-scroll IWG turbine housings for the G25-550/660 and various IWG EFR T4 models. SOS uses a Mitsubishi Evo flange which was probably the only way to get twin-scroll when it was designed, and Ptuning uses a EWG and V-band, again probably to take advantage of the turbos that were available when it was designed. But it is 2019 now!

Lucky7s

I make 482 WHP on 93 Octane with a C38-92 KW kit that LHT installed. I am going to tune her to 110 Octane shortly and see if the extra timing nets me the other 18 HP.
John tuned it very conservative on the timing and fuel side so quite happy with the 482 WHP number. 500 WHP is possible without E85 if you use higher octane fuel.
Like the previous poster said though, don't know what your access to higher octane fuel is where you live.

Good Luck in your HP quest!

riceball777

With normal driving I average 22mpg 100% stock. 20 mpg after I went turbo on 91 octane and about 14-15mpg on e85. After running e85 you will not want to run 91octane any more. Your talking 200+whp more on e85 and even a bigger gap with bigger turbos.

kumar75150

From what I've read, the transmission is the limiting factor. I make >500whp on 93 octane. If I thought the tranny could handle more, id switch to e85 and turn up the boost.

Mijae007

And differential......moreso the diff than the trans. But just about everything else in the s2000 drivetrain is not sustainable at 500+.........driving characteristics play a huge role in longevity of parts too.

DavidNJ

https://www.grannasracing.com/collec...gnum-swap-kits

InlinePRO S2000 F2Z33/34 CD009 Trans Conversion Kit - Inline Performance Products

https://shop.quaife.co.uk/honda-s200...l-gearbox-1911

InlinePRO Super 8.8 S2000 Rear Diff Kit (diff not included) - Inline Performance Products

https://www.driveshaftshop.com/impor...-kit-level-5-9

https://www.driveshaftshop.com/impor...riveshaft-2313

riceball777

It’s really the diff more than the transmission. The transmission is way stronger than the diff. I been at 588-630whp for many many years with 130,000 miles on the stock engine and transmission. Over 50,000 miles turbo now. But I’m on my 3rd diff. Blew up a stock diff and blew up a comptech reinforced diff. So far the puddymod mod stage 3 diff and been great.

Kyle

I've always seen differing results on this, not necessarily opinions, and in my mind it all comes down to how you drive and modulate the throttle as someone above stated. I don't have much experience with higher power cars, but just by reading differing results from differing people I'd say driving style plays a huge factor. Are you gradually rolling onto the throttle to get into higher power? Or are you clutch dumping at 7 grand, doing burnouts, banging gears, rev limiter shifts, mashing the gas in lower gears so you get a huge kick of boost and torque hitting the transmission all at once....

Personally, the S2000 transmission is probably one of the best feeling out of any production car, I wouldn't want the added expense of a T56 or CD009 conversion on top of losing the nice S2000 shifter. I'd much rather control my right foot instead of having to constantly replace transmissions or do a swap. Obviously the same doesn't apply for drag cars or other cars that get driven hard....but I couldn't see why a 500+ whp street car would ever need to upgrade the transmission, or even have to replace one for that matter.