A fellow driver and I each had our RSX-S at CMP, he for racing (SCCA SSB-class) and me for driver's ed. Both cars are completely stock drivetrain - no intake, no exhaust, nothing.
On the dyno supplied there (portable Dynojet 248), we each did 2 pulls and were very disappointed by the results. It was hot out, but the dyno operator assures us the figures we got were corrected for temp, humidity, etc.

One car was low mileage - not quite broken in - 149 whp = 174 crank hp (15% loss estimated)
My car has 7800 miles - broken in - 153 whp = 180 crank hp (same 15% loss estimated for calculation)

My friend has spoken to his dealer, who told him that some of the early cars did not have the best programming for the ECU.

Anybody know of any Acura TSB on this issue? Anyone else run low numbers on the dyno with a stock drivetrain???

 

there are eccu fixes avail at the dealer, its a simple program update..
damn i hope thats the reason!

 

Should we have this fix performed just to be safe even if we haven't dyno'ed our cars?

 

ECU updates are always good to get.

 

Is there a ECU fix,..@ the dealership?? Whats the deal w/ all the other dyno charts I'm seeing having big increases?IS it the ECU?DAMN,..I'm pissed.Maybe I'll have to have a lilttle talk to ACURA!

 

hehehehe

 

can someone explain the ECU problem to me?

 

No offense but that is a weak dyno figure.

 

What kind of Dyno was it? Dynojet dyno? Mustang dyno? Dynopak?

Andrew

 

See top - Dynojet 248

Need to call dealer again - they haven't responded to my first inquiry.

 

Hmmm...interesting.

Out of curiosity, what were your torque numbers?

 

Maybe this is why some magazines have been getting really slow acceleration times. I was just browsing through this month's SCC and their stock RSX-S was only pulling a 6.9 on the 0-60. The fastest NA RSX of the group (Toda's) only pulled a 6.4. That car had IHE and cams (a prototype) I believe. Then again it could just be SCC's equipment. And come to think of it, their stock RSX was pulling about 180 hp at the wheels on the dyno.

Hope you guys get this solved. I wonder how much higher up dskull would have placed had his engine been broken in...


[Modified by JMU R1, 10:11 PM 4/29/2002]

 

Can you give us some torque numbers?

And those HP figures dont look accurate either.

 

really low

 

wish I had a scanner here...
Right off the dyno sheet:
Abacus Racing Mobile Chassis Dyno Services
Dynojet 248 - SAE corrected figures
DYNORUN.001 Max POWER = 153.2 Max TORQUE = 119.3
DYNORUN.002 Max POWER = 149.0 Max TORQUE = 117.3
Intake Air Temp 97F
Relative Humidity 32.4
Barometer 29.26

Max HP seen at 8000 rpm, Max TQ seen at 6400 rpm

Yes, it was hot that day. Yes the hood was up and a fan was blowing on the radiator. The figures are supposed to be "corrected" for environmental factors listed above.
Taking it to the dealer on Monday to check ECU and anything else that could be the problem.

 

good luck wif the dealer Adam.

Will

 

Gotta love the torque though...

 

the tq #'s compare to a b16

 

The car feels great on track (to somebody new to FF), but these numbers don't support the power advertised.

Jason- will you just pick a screen name and stick with it?

 

Did either you or David run an O2 sniffer on your pulls to see how your A/F ratios were?

Even with the correction, I wouldn't be all that terribly surprised if the computer got pissed at the extreme heat and humidity, and dialed back the timing which would suck power from your motors.

 

We did not have any O2 sniffer available, so the A/F ratios were not available. That's not the first comment I've had regarding that. One of the authors for Sport Compact Car magazine I've been in contact with (no flames please) told me that it is likely that in such high heat, the ECU would retard the timing on the engine in order to protect itself.

With that said, dskull (the other RSX-S dynoed that day) has seen very good results after re-flashing the ECU at the dealer and running another dyno pull. I'll let him comment on the details but let's say that he saw almost a 10% improvement... Rumor is that some of the early cars were supposed to get ECU re-flashes between delivery to the US and delivery to customers.

So - could be the heat, could be the ECU. Either way, re-flashing my ECU on Monday can't cause any harm, so I'm going to do it, then try to find a Dynojet in Charlotte NC somewhere. Anybody know where to find one around here?

 

Belmont... Tom is your man.

'248C Dynojet'

704-827-3944

Will

 

Cool - thx man.