I changed a few things since we last made 525 whp. First of all the 525whp was made at about 29pis, this time around we're making 551whp at 27psi. New additions to our EVO8 are a Forrester Racing Heads (FRH) ported and reworked head, cam timing, and the AEM EMS. Bottom end is still completely stock. In about an hour or two I had the EMS dialed in and with the benefits of timing control, torque jumped to 455ft-lbs at 27psi compared to 395 ft-lbs at 29psi before. Just to give an idea of what hp it's making here are some boost levels and corresponding whp.

15psi - 400whp
22.5psi - 497whp
25.5psi - 536whp
27psi - 551whp

This is still with our prototype turbo kit and our finalized version is almost ready. The new version of our turbo kit utilized an improved header design and 321 SS piping with equal length runners. Also the compressor cover on the turbo will be a slightly larger more efficient version with a 4" inlet and 2.5" outlet (same spool-up as now but higher efficiency for more HP potential). Spool-up BTW is amazing, if anyone local on the board wants a crazy ride, stop by the shop.

-Martin

 

what type of gas did u use on the 551whp pass...?

 

How do you feel about the longevity of the SS piping? How's it going to hold up on a daily driver?

 

Great numbers!

What size turbo are you using and where did you start seeing noticeable boost as well as maximum boost?

Thanks.

 

Good question about the manifold. is their any way that you guys can guarentee what happend to Al with his HKS kit won't happen with yours?

everything you guys are doing looks increadibly tempting. i myself as well as many other members are looking to upgrade the turbo but i think after what happend with Al everyone has to ask the question if what we're buying will hold up over long periods of time and use.

if you guys can give any feedback about your products and their longevity, i'm sure we'd all like to read about it

thanks

 

hey i might have to stop by, last time i stopped by was when u guys just got your evo! it was a crazy ride then but this should be even crazier..cant wait! good luck with everything!

 

the 551whp run was done on some 116 that was sitting in the tank for over a month. Knock noise was within normal limits and the plugs looked clean so there was signs of detonation, nor should there have been.

321 Stainless Steel is designed for higher temperature applications. 304 SS is actually not much better than mild steel once it's temperature reaches upper 700 deg C. 321 maintains it's properties and hold up to heat cycling much better than 304 at these elevated temperatures. the key to making a header last long in a street application is to provide proper support. Once you guys see our support for the turbo/header you'll understand. I don't want to show pics or describe the support just yet, I need to keep some stuff a suprise so it's not copied right away

I've already talked about this turbo quite a bit and I've been experimenting/testing it since last year for a Garrett Turbo-house. The latest issue of Modified Magazine has an article I wrote on our EVO8 and what turbo's I tried and the results. Not to give too much away, it's a variation of the Garrett GT35R. By far the best turbo I've used that is still totally streetable and has the ability to pump out over 700hp.

 

BTW the reason I stopped at 27psi is because at this point I don't trust the stock rods, I know I could make more but I don't want to find out and wind up buying a complete new block from mitsu ($$$).

 

Nce job !

 

Any Dyno graphs?

 

Bump.

 

I'll post some dyno curves tomorrow. The 551whp curve I didn't floor it till about 5K rpm so I would be past peak torque, it still make 455ft-lbs at that point, I was really nervous about twisting those rods.

 

Great job! On the 22.5 psi pass was timing to advanced for a pump 93/94 octane run?? What rpm do you see 20 psi?? 4500? Great Job!

 

God DAMN! 551 HP at the wheels on the stock bottom end? That is somewhere between 610 HP and 650 HP at the crank! You just verified for me that I will not have to do a bottom end buildup to reach my 500 HP at the wheels daily driven goal.

Thanks,

Keith

 

Please throw some 93 octane in there and let us know what it will do in normal day to day driving. You can find 100 octane around here, but at $7.00 a gallon I think that I will pass and just use the trusty $1.56 a gallon 93. I think that several other would like to see the 93 pull as well. I am also amazed that the stock bottm end held up to that, it is obviously much stronger then I thought.