roenick7

I just had a Apexi SAFC and Rev/Speed installed. They took off the piggy back ECU from Swift 2nd Generation, and ran baseline with the stock ECU 208 rwhp. After adding serious gas to the lean motor the car produced 248 RWHP. SWEEET! I could tell a difference from the swift ECU and the Apexi SAFC probably 9-10 RWHP on my set-up. I was very happy I did this mod. The other enginge performace MODs are RMM exhaust, Swift cold air intake, new iridium plugs.

Others TRD STB; RMM Sway F&B; Bilstein/eibach;RMM T/C;L-tuned steering ECU; 19" zenetti Mystiks; Tom's rad cap; TRD Oil cap; TRD 71' thermostat; Power-stop rotors, TRD Pads; Braided brake lines....

On order w/ Steve G. : TRD Rear DIFF w/ install

7-15-02 Cal Speed installing direct port 140 shot NOS w/ purge and progressive controller.

biggie27

hold on your running 208rwhp stock that # is very low you should go check your engine out you could be missing a cylinder or something seriously with the gs you should be looking at no less than 230rwhp

Static911

He may be right with the 208 rwhp.

You ran the GS with the SRT intake alone to get the 208 rwhp?

Ethan

GS400_PUSHER

My stock HP was 227:eek: Now with SRT's HFI and Racing ECU I am up to 255hp

DaveGS4

iTrader: (2)

roenick:

Biggie's correct, your baseline is extremely low - something is wrong.

From the way you worded your post, I'm guessing the shop that did your tuning and dyno may have run the baseline using the SRT intake installed, but without their ECU. When you run this setup, the GS computer doesn't know what to do with all the extra airflow and the fuel/air mixture is all screwed up (car runs rough if at all, stalls, etc). SRT doesn't ever recommend running their intake without the ECU... Can you confirm?

I'd be interesting to get a 'before' dyno using the Intake + SRT ECU (race or otherwise) to compare against your Apexi install... did they get one of those? My recent dyno was also right at 248 RWHP.

Also - did they happen to lock down your RM torque converter during the dyno? Locking mine during dyno made a HUGE swing of 257 RWTQ vs 303 RWTQ.

LexusL

I agree it is to low for a gs400 it should be around 230-40rwhp 200 is really low with intake ecu or no ecu something is wrong get it check or maybe the place you dyno maybe at fault

roenick7

It was because the SRT without the Swift ECU the mixture is too lean. depending on the stock ECU to caculate the correct fuel ratio did not work. The baseline with the swift ECU my guess after driving both would be around 237-240. 208 doesn't correctly represent the "true stock baseline"(aprx. 230). It represents what happens when you put the cold air intake on with the proper adjustment for fuel. Weapon R included.

I hope this clears everything up.

bitkahuna

iTrader: (20)

Yes, going from 208 to 248 isn't that meaningful because the stock ECU with the SRT intake is going to suck (or is going to suck too much ).

I got 238 RWHP on the dyno with no intake or ECU but I do have drop-in K&N and L-Tuned exhaust, so maybe they help.

RON430

Hey Ethan,

Nothing like having the benefit of your (and everyone else who participated) efforts for the dyno testing. Everything may not come out the way the vendors like it to but I am still very glad you did those tests and reported the results as factually as you did. I appreciate the effort you put in, just hope you can muster the energy to do the Injen/SAFC runs. Thanks again.