I went to the dyno yesterday, to see how my numbers have changes after having my RT Cats and LPE CAI installed now for about 3 Months. My next planned mod will be a tune, so I wanted to have a good idea where I was numbers-wise, so I can get an idea what value I get out of a tune. Unfortunately I don't have a Wide Band O2 sensor, to get fuel/air readings, and the dyno I go to doesn't have the exhaust rectal stick to get any data (even though it may not be that good). I made sure I went back to the same exact dyno, run by the same guy, using the exact same settings. Also to check the 'real' performance gain of the CAI, i waited a good long time, to do the 'after' test, to remove any PCM trickery (i.e. car runs extra lean right after install, because PCM hasn't recalibrated itself, thus providing extra performance for a short while.)
Dyno used was a Mustang 1750 Dyno, running temperature corrected numbers (Not SAE), with a weight set @ 4000 LBS for the vehicle. Base run was done June 22nd, outside temp was about 80 degrees. 2nd run was done Oct 26 outside temp was about 60 degrees.
Pulled 3 times each. On new pull, I did have to do the parasitic test, since I was the one and only car there (on the baseline, Gary's car did the parasitic(?), so mine didn't have to). On the baseline pull, my car has sat for about 2 hours, prior to running, on the new one, It sat about 1/2 and hour. To make the comparisons as relevant as possible, I compared the 3rd run from each test, so engine heat soak would play the least factor (i.e. both should have been fairly hot). I didn't note oil temp on the baseline run, but on the 3rd run from the new, it was at 210 degrees.
Baseline Mods:
Corsa Exhaust
Random Technology Cats (installed about 2 days prior to dyno pull)
Stock Tune
New Run Additional Mods:
LPE CAI
Changed rear tires to 275/40 GSD3's on stock rims.
NOTE: I'm not sure what affect changing to the wider/heavier tire had on these following results, probably a bit, but not too much (my guess would be
< /0.5% :hmm: )
Results:
Peak Gain:
+8.9 RWHP 3% Gain (295.5 @6150 vs. 304.4 @6350)
+2.8 RWTQ 1% Gain (285.2 @4900 vs. 288.0 @4850)
Baseline made more HP up to about 4600, where newer run surpasses it
Baseline made more TQ up to about 4400, where newer run surpasses it
It would appear from the graph, that I gained up high, but lost more down low.
Bottom Line: This looks like a good mod if you are looking for more power up top, but the loss in the lower RPM's may not make it worth it for some. It was a good value for my driving style.
It really amazed me what a HUGE difference heat soak causes. My 1st run from June (when engine was 'luke warm'), my peak was [email protected] RWHP vs. 298.9 @4900 RWTQ, this was quite a bit higher than my 1st new run (almost exactly the same as my 3rd run above). This came down drastically, to the number shown above (295/285). From now on, the number I'm really going to concentrate on is my 3rd pull, as it is MUCH more representative of the vast majority of my driving (engine is up to temp.)
I'd love to hear any comments people might have.
I don't have a scanner. I'll try and take a pic, and post the graph later.
-Chris
Dyno used was a Mustang 1750 Dyno, running temperature corrected numbers (Not SAE), with a weight set @ 4000 LBS for the vehicle. Base run was done June 22nd, outside temp was about 80 degrees. 2nd run was done Oct 26 outside temp was about 60 degrees.
Pulled 3 times each. On new pull, I did have to do the parasitic test, since I was the one and only car there (on the baseline, Gary's car did the parasitic(?), so mine didn't have to). On the baseline pull, my car has sat for about 2 hours, prior to running, on the new one, It sat about 1/2 and hour. To make the comparisons as relevant as possible, I compared the 3rd run from each test, so engine heat soak would play the least factor (i.e. both should have been fairly hot). I didn't note oil temp on the baseline run, but on the 3rd run from the new, it was at 210 degrees.
Baseline Mods:
Corsa Exhaust
Random Technology Cats (installed about 2 days prior to dyno pull)
Stock Tune
New Run Additional Mods:
LPE CAI
Changed rear tires to 275/40 GSD3's on stock rims.
NOTE: I'm not sure what affect changing to the wider/heavier tire had on these following results, probably a bit, but not too much (my guess would be
< /0.5% :hmm: )
Results:
Peak Gain:
+8.9 RWHP 3% Gain (295.5 @6150 vs. 304.4 @6350)
+2.8 RWTQ 1% Gain (285.2 @4900 vs. 288.0 @4850)
Baseline made more HP up to about 4600, where newer run surpasses it
Baseline made more TQ up to about 4400, where newer run surpasses it
It would appear from the graph, that I gained up high, but lost more down low.
Bottom Line: This looks like a good mod if you are looking for more power up top, but the loss in the lower RPM's may not make it worth it for some. It was a good value for my driving style.
It really amazed me what a HUGE difference heat soak causes. My 1st run from June (when engine was 'luke warm'), my peak was [email protected] RWHP vs. 298.9 @4900 RWTQ, this was quite a bit higher than my 1st new run (almost exactly the same as my 3rd run above). This came down drastically, to the number shown above (295/285). From now on, the number I'm really going to concentrate on is my 3rd pull, as it is MUCH more representative of the vast majority of my driving (engine is up to temp.)
I'd love to hear any comments people might have.
I don't have a scanner. I'll try and take a pic, and post the graph later.
-Chris
[Moditis]. When I put each mod on i felt a difference. Probabaly most with the CAI, and then the RT Cats. The CAI initial bump though was probabaly around 20 RWHP, untill the PCM, stopped running lean, once it learned itself up.
