As many of you know I had in my sig 277whp and 200ft. lbs of torque at 7.5-8psi on a complete stock motor with the Rev-hard turbo kit with the FMU set up. Well, after I had dynoed with my new set up people where asking my why I made less HP than my previous dyno. Here are details.

On the very first dyno run on the set up above, with a 2.5" downpipe and 60mm Apex N1 exhaust I made 266.5whp 193.4 ft lbs. Not bad for what I had and here is the dyno:

But notice the dyno above is in standard and not SAE corrected.

I pulled out an another dyno. On this dyno(dyno run 3-6) I had upgraded to a 3" downpipe and 3" thermal. I though I had made the 277whp, when in fact I had only made 274whp 199.6ft lbs standard and not SAE corrected like we all read dynos and compare.

So becuase I was curious to see what my real #'s would be in SAE, I went to the dyno I had originally done my dynos and got print outs of each dyno. Here is the run down.

Dyno run1: 266.5whp 193ft lbs. Standard 261.4whp 189.7ft lbs. SAE
By the looks of this there is roughly a 5hp difference between standard and SAE.

Now, when I was printing out the dynos the HP was only printed and not the torque and here is the dyno run 6, where I thought I had made the 277whp.


When I asked the shop to print out the HP and torque he asked me if it was ok if he printed all 6 dyno runs on one sheet. I didnt have a problem with that, but something I noticed that doesnt make sense. All they dyno runs WHP are the same with the exception of dyno run 6. Look at the dyno run 6 above and compare it to this dyno that has all the other dynos on the same page. The SAE WHP figure above is 273.6whp, where as below its 269.1whp SAE.


I talked to 2 dyno tuners and one said that the reason that my last dyno run was low is it compares all the previous dynos and corrects them according to temp etc..
The other tuner said there is an option on the software called "smooting" where it can read the spikes and had a slighty longer/wider grid.

So there it is, I'll take the 269whp/ 195ft.lbs.

Im also sorry if I mislead anyone, I honestly didnt know. And here is a most recent dyno with my new turbo and manifold at the same amout of boost. As you can see, I didnt loose as much HP like I thought. Below is a SAE corrected of a semi-final dyno run.


art

 

and as I said, what does it really matter, so long as you are faster than you were before!

Are you?

BTW, the profec A had a lot to do with your higher than average Tq reading

 

clif notes: 277whp was actually 274whp STD. When I got the SAE dyno #'s it was 269.1whp SAE. Read it!

 

Yes I am because the torque is so much more smoother.

 

so the last dyno is the final SAE corrected dyno ?

 

Yes.

 

blah, no big deal.

 

Good News Art..

 

We forgive you art. Dont ever lie to us again though.

 

Can you elaborate on this? why would the boost controller up the turque if it is at the same PSI?


Rob

 

Even if it's at the same boost level, an EBC can keep the wastegate closed until the desired max boost pressure building boost faster and at a lower RPM as opposed to just running off the wastegate spring where it will gradually open until it reaches max boost depending on the spring.

 

You're a liar art. I hate you.

(I can gar-awn-tee someone isn't going to see the sarcasm)


[Modified by turbocoupe, 3:29 AM 10/30/2002]

 

Ban ban ban!

 

Are you going to try the AEM boost option?

Also GudeH23A, nice avatar!

 

Im waiting for my wide band to come in so we can tune the part throttle. You got to love auto mapping..hehe But as soon as I get all of that in good working condition, then I'll move up to messing with the GM boost silenoid.

art

 

Great numbers mang Speedworks, I thought they only had a motorcycle dyno??? At least what I heard.

 

Hey Art,

You might want to consider taking a floppy over to Redline and just ask them to save the files for you. My g/f had her RSX-S dyno'd there several times to test mods... instead of asking them to print it all out, I just saved the files. Went to dynojet.com and downloaded the viewer. At that point, I was able to mess with it any way I wanted it.

-S

 

hmm. good detective work!
still great numbers

 

"The other tuner said there is an option on the software called "smooting" where it can read the spikes and had a slighty longer/wider grid."

DynoJet has 4 levels on smoothing. S1 shows every spike thru S4 which gives you a smooth graph. The software just averages out the spikes caused by tire slippage, improper fuel curve, etc.

 

still looks good Art.

 

art, aren't your new numbers also lower because you needed to finish tuning and never got to? if so you should probably easily see more power than you old setup....

 

i cant wait to get that thing up into its effeciency range

 

tisk tisk lying is bad, you should know that art, bones have been broken for a lot less!

 

I feel betrayed.

Sonny

 

looks like your new turbo is maintaining torque to redline better then the old one but w/ a lower peak #. things should get interesting w/ that bad boy i cant wait for our next dyno session.


[Modified by DIRep972, 5:13 PM 10/30/2002]