Pit_Viper

Greetings all,

First off, I'd like to thank Ben Davis for providing the space, since my other account is a bit screwy right now...

Yesterday, I ran my '91 SE-R on a dyno. Here's my list of modificiations:


-Cone filter ("POP" Charger)
-HotShot 3rd Generation Header
-Catco high-flow catalytic converter
-Bosal mid-pipe (~1 7/8 ID, stock replacement)
-Flowmaster 50-series 3-chamber muffler, dual 2" outlet (very loud)
-Jim Wolf Technology S4 Cams
-Jim Wolf Technology ECU (not the S3/S4 cam program)
-Timing at 15° BTDC

The chart can be found here:

http://laf.cioe.com/~benbobbo/Slow_SE-R_Dyno1.jpg

I'm quite surprised at the results. I expected much less. Anyhow, as you can see, my peak torque is a bit low, but I'd expect that with low compression on two cylinders. Regardless, the torque curve is quite flat from ~4500-6800 RPM, then it falls off fast. Still, I think there's enough torque just before the fuel cut to justify making 7750 RPM a valid shift point at the drag strip (although my results so far don't support this theory, hehe.)

There's probably a bit more power left. For example, I'm still using the "standard" ECU, and I don't have cold-air intake. Also, for those who have good compression, there's a possibility that even more power can be gained.

Questions? Comments? Doubts (I'm still surprised, heh)?

 

Jason92Classic

I didn't know that JWT optimized our ECUs for the cams. I bought my ECU and a year later bought the cams. Should I have the ECU programmed?

Is that 151 uncorrected HP??? If so, that ROCKS.

Pit_Viper

Apparently, they do optimize the ECU for the cams. I'm assuming that the S3/S4 removes some timing advance that's present in the "regular" program (the cams don't like timing advance), in addition to raising the idle. I don't know what else the S3/S4 program does, so I'm not sure if having the ECU re-programmed with the S3/S4 cam program is worth $100; that's a question Rob Cadle could answer.

I think the HP figure is corrected. It says "SAE Corrected Horsepower" on the side of the chart, so I guess it's corrected, unless there's something else involved...

Jason92Classic

I made a mistake. I meant to ask if that was 151 to the wheels! That's awesome power to the wheels being Normally Aspirated.



What does "SAE Corrected" HP mean?

[This message has been edited by Jason92Classic (edited 04-20-2001).]

Pit_Viper

Yup, that's at the wheels.

That comes out to either ~174 HP or ~178 HP at the crank depending upon how you decide to the 15% drivetrain loss calculation (that's good for an entire thread, heh.) Also, you can look at some of the stock Celica GT-S (180 crank HP stock) dyno charts on this page for peak HP comparison:

http://www.newcelica.org/other/dyno/index.htm

Well, I guess the S4 cams are pretty good, eh?

that is nice power to the wheels man. why dont you go to my website. I have a 1/4 mile and hp calculator on the site. you can see your 1/4 mile ** you hit the track and compare how accurate it is. www.wkdtrbo57.bigstep.com

jacen99SE

Corrected for temperature and atmospheric pressure.