So after my last trip to WORKS for a dyno where I put down 286wwhp (whopping wheel horsepower) and around 290lbft (keep in mind I have WORKS downpipe, WORKS I/P, WORKS ABM, cossie cams, springs retainers, fuel pump, boost hose, and brainflash- stock cat), I checked my exhaust system for leaks since my car was running rich. Found them and decided to replace my cat with the WORKS HFC. No more leaks so it was off to WORKS for another run.
304whp and about 301lbft. For some odd reason I keep thinking that the #'s should be higher (comparing to EuroEclipse's run without cams, but with licp and i/c). That's not my main frustration though. My dyno charts just look wrong.
My issue is with why my car doesn't make power after 6800rpm and again I don't believe it's in the tune, but rather something mechanical with the car that is keeping it restricted at that level. So power is not the issue per say, but more having to do with the powerband above 6800rpm.

Let me note it here that I truly believe that the fault is not in WORKS, but that it lies with my car (again comparing to EuroEclipse's chart).

The only thing I can think of now is if my turbo/actuator took a crap on me. I am also wondering if a bad diverter valve could be the/a culprit. If someone could help me post my charts for all to get a better clue as to what I am talking about then please pm me. Thanks!

BTW- Hi Oliver!

Oh- and the guys at WORKS are really great. I would recommend them to anyone.

 

Cosworth cams are worthless every thread i see people complaining about there numbers have cosworth cams.

 

How can u even come to that conclusion? You DONT know whats wrong with that car what so ever. The car also has a hi flow cat

 

I doubt it's the HFC because the graphs before and after look identical aside from the fact that there is a 10-15hp gain all across the board with the HFC as opposed to the stocker.
I wonder if I got bad cams?

And here is EuroEclipse's dyno graph that I was referring to. His power doesn't drop at the top whereas mine takes a dive at about 6800rpm.

EDIT: Forgot to post the link https://www.evolutionm.net/forums/sh...d.php?t=265839

May just be a factory freak. Why can't I get that lucky?!

 

I don't think the Cams help that much on a low boost 91 Octane setting. If you could get more airflow and run a few psi more boost, you might be in better shape. Cats hurt HP as well, by keeping you from being able to run higher boost without knock. The HFC combined with the 91 gas is holding you back quite a bit. The stock piping and intercooler also impede airflow quite a bit. It's just the combination of low flow and low octane that is limiting your car. A test pipe and a Buschur or AMS race IC and pipes would more than likely allow you to run 2 more PSI boost. Then the cams might start to really work with your combo. One of the reasons Im glad I don't live in Cali anymore.

 

Hey Rocket Man,

As we talked about, there is nothing particularly wrong or strange with your output. On our Dyno, your numbers translate to 360 to 365hp at the flywheel, which is definitely in the "average" that we have seen with our Dyno given your boost and AFR’s. The area under the curve looks normal as well. You might just be hungry for more power. It never ends up being enough anyway, right?

In terms of the Cossie Cams, they are awesome! Definitely the best cams for the EVO IX that we have tested based on power and torque along with idle quality.

Are we limited by the quality of gas? YES.

Let us know when you are ready for that stroker and turbo kit to eliminate your quest for more power!!! Hint, Hint!

Sincerely,

Oliver Simons
WORKS
415-226-2500
osimons@worksmitsu.com

 

I agree about the cams in that they are good cams and idle great. Everything looks great up to about 6800rpm where power and torque take a dive. For some reason my car just won't make power to redline.
I've been thinking about it and had a talk with my local tuner. We came to the conclusion (same as stated above) that maybe my stock pipes and intercooler are what may be keeping it from making or holding power to redline, but that's something I'd like another opinion about. We also think that the GM boost solenoid or another aftermarket boost controller may help.
Again, my issue is with why my car doesn't make power after 6800rpm and again I don't believe it's in the tune, but rather something mechanical with the car that is keeping it restricted at that level. So power is not the issue per say, but more having to do with the powerband above 6800rpm. Sorry, I should have made this clear up there and from reading it again I did not. Fixed.
BTW- boost peaks at 22psi before tappering off to around 19.

Yeah, Oliver- a stroker would be awesome, but out of my reach at the moment.

 

I dont think a I/C is needed right now. An better flow uicp and a larger licp would be great though. I had my car dyno'd about 2 months ago with only an exhaust and intake filter. My whp was at 255. I was limited with time constraints so I couldnt get the best tune I could of gotten.

Well what I'm trying to get at is. A few evos later with just a licp, uicp, intake system, and a tbe. They got around 290whp. With the same tuner. You gotta open your air flow up more to see bigger gains. You'll probably get around 320 or 330whp maybe even 340whp with a cat delete. Those are just estimated numbers from what I've seen. Remember though, its all going to depend on the tune in the end.