ttribe

06 GT with 2.6 KB supercharger, intercooled, supposed to be 9psi.

First off, i temporarly hooked up a boost guage... thing rarely hits 9ps. i had a friend keep a close eye on it on various runs 2nd to 4th gear (on the street). Mostly 7 to 8 pounds, only SOMETIMES did it hit 9psi and that was only in 4th gear. he said it actually look more like 8.75psi.


Dyno numbers (run to 6400ish rpm)

Run 1 .... 411.69 HP 387.53 Torque

Run2 .... 424.49 HP 380.31 Torque

I can not figure out why Run two had a 13 HP increase / 7ft/lb loss. and also, my 2nd run has a "spike" in power for the last 1k RPS ... like maybe the boost spiked up that run, i dont know. Also, run1 has a "dip" in hp/tq around 3200, but in run2 it is perfectly smooth over that spot.

Test was in a warehouse, pretty warm in there, but printout of the dyno runs does not include any variables. I dont have a scanner, I will take a digital pic of it tomorrow and post it.

Oh, reason i am disappointed is because KB claims 465ish RWHP on my kit and around 411 ft/lb. I went in expecting to see some 440+ #s. Maybe is was weather/temp/humidity whatever, maybe not.

ttribe

One last thing, this car is stock except for the kenne bell kit, 20" wheels and body stuff.

05 Ricky

20 inch wheels don't spin very well on the dyno, I bet you have alot more in it!

05 Mustang

I have to agree with you, those numbers are not very impressive at all for a KB s/c..was it professionally installed and tuned? If it wasn't, I would definitely suggest you get that done and if it was, I would look at having it done again.

as far as the number you were expecting to see...it is basically up to the person tuning it and the dyno the car is ran on.

good luck



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CrazyAl

A few thoughts:

1. Temperature/humidity/elevation could be a factor. Can you fill us in on these?

2. How was the air flow around the car during the run? Heat soaking can be a major issue on dyno runs, especially on forced-induction setup. Your intercooler may have been operating very poorly due to this, and that will cost you power.

3. Was the clutch slipping? Generally one upgrades the clutch when adding a blower.

4. I wouldn't trust the pressure gage reading very much. The vast majority of pressure gages are quite inaccurate, +/-20% or more error is common. Also keep in mind that a "9 psi" blower setup will only make 9 psi PEAK boost. It's not a constant 9 lbs.

5. 20" wheels will be costing you a good amount of HP on the dyno due to excess weight. 20" wheels are a downgrade from a performance point of view.

tcoope13

was it a mustang dyno or dynojet?

MJDGator

Crazy Al is right. 9lbs boost is peak and you may not hit that in first or second gear because you get to redline too quickly for boost to build that much. The way to check boost (on the street) is in 3rd with the pedal to the metal and as you are approaching redline you should hit near or at 9 and hold (assuming it is tuned properly). Problem is you will probably be going pretty freakin fast with the hammer down in 3rd so finding somewhere to test is difficult.

mustangman02232

dynojet or mustang dyno? also i know someone who picked up 30 rwhp from switching from 20" rims back to 15s, so thats a factor as well

Timmay!!!

Dyno #s blah, blah, blah,.. Shouldn't the main idea here be how fast you get through the quarter mile or around the track. . I've seen far worse #s from similar setup-ups and I wouldn't expect the kit to make 9 psi ALL the time. If your seeing 7-8 #s of boost most of the time , I'd say thats pretty good. But once again like CrazyAl said there are ALOT of factors to consider here, condition of the car, altitude, heat, dyno, etc..I'd bet your kit is working as advertised. Man, I wish I had money to spend on a KB[>:]. Sorry if I'm ranting here. Good luck achieving the dyno#s you seek

moosestang