msb2tg

Because of all the questions/concerns from the last dyno run about the car "being unhappy", I decided to
re-run the
car today, take note we did no adjustments nor did we fix the so called "problems" with the car,and this is what the car produced.
I have the following
engine
modifications:

PSI 550 ECU software
PSI Intake
PSI Exhaust
K24/K26 Turbos

Woodster

MSB2tg:
So everyone knows, you are part owner of 969 Motorsports, this is no secret.
Now, on to the dyno:
I have noticed (2) things,
a)465.5 horsepower to all (4) wheels is alot of power !!! I would like someone like
Sharkey or Stephen to convert that to flywheel horsepower for us. I know that
Imagine Auto has the exact same type of Dyno (Mustang) and the graphs on their
website are the same type of graphs, so there must be a standard conversion used.

b)Max torque of 446.4 is at 4000 RPM's !!! this is very early in the so called curve,
for such big turbos, that does not seem laggy at all.

Thank you for taking the time to rerun it for everyone to see,
out of curiosity, did you do more than one run? were any of the runs
higher in horsepower and torque??

cheers to a very powerful package it would appear!

Marty

PorscheDoc

About 620hp/594tq crank figuring 25% drive train loss. (edited)

Woodster

Karl, thanks for the response and help me understand your basis for drive train loss.

On your I/A Website you offer a "Stage 4 (600 H.P.) kit
on the dyno listed for this product (mustang dyno like PSI car above)
it shows peak horsepower of 457.7 H.P., and using your calculations that
comes to (divide by .8 == 20%) == 572 crank horsepower ??
to "raise it" up to 600 crank horsepower you would have to divide by .76 (which
equates to 24% loss ??) 457.7 divided by .76 == 602 HP.
if this is the case (it appears to be I/A way of calculating a MUSTANG),
then the PSI 550 would be 465.5 divided by .76 == 612 H.P. which is pretty
good for a "550 kit"
I do not pretend to know what the loss factor is I am just trying to make a
direct comparison.
thanks for all the info,
Marty

Dock

Looks like PSI should be calling it their "PSI 600" upgrade. Then you'd have a direct comparison. Or then again, GIAC could change the name of their current stage 4 and call it their "550 upgrade".

msb2tg

marty,
yes i am a part owner of 969 a psi dealer, and i own this car, no secret here.
we did do 5 runs, the highest one was 473 hp to the wheels.
tks
mike

PorscheDoc

I have been corrected by the high powers. Figures for a mustang should be divided by .75, so PSI numbers are 620hp/594tq.

Kevin

Mike can you post the Mustang data logs that go with this dyno sheet, it will show the boost and AFR's... I am curious about the AFR's...

Woodster

PSI 550 == 620 H.P./594 TQ with stock exhaust manifolds (stock "headers"),
and stock intercoolers...

markski

Im assuming this is a 1.2 bar program. yes/no ?

Jean

Has it occured to anyone that this is being looked at from the wrong angle, the kit is indeed 550HP and that in fact, what is happening here is that this is one more proof that the way the chassis dyno runs are being made by many tuners, whether on Mustang or other, overstates HP, since they do not load properly the engine?

I would like to think that the PSI 550 was rated in Belgium on their state of the art dyno, based on their best run, with the best tune they could have and with the best fuel available, and under DIN standards, therefore I see it hard to believe that they underrate their kits.

This is clear evidence once more that many of the dyno runs we see, and many of the kits being sold out there based on these chassis dynos, are overstated vs. what the factory or engine dynos give you, and I am not saying that is done with the intention of cheating, only that those 6-8 second dyno runs we see are in fact much less than accurate and grossly overstate HP, 900HP kits are more like 750 at best in fact.

Let the party begin

PorschePhD

Agreed, the nice thing about a Mustang is that it can be made to run a loaded timed run. Whether or not someone does this is a different story. We typically will run a 45 second dyno. Think that doesn't sound like a lot, HA. It takes for ever. There are few dynos that have this ability.

Needless to say doing this will also burn a few straps just from the heat coming from the headers. We have to use chains because no amount of protection will help the straps.

I have ha some intresting cars on the dyno that were claimed BIG HP or well known tuners. Most fall short to some degree when dynoed this way. You would laugh if I posted their sheets.

Woodster

I agree with both of you !!!!!!!!!!!!!
The PSI tuning packages are tested on their own MAHA dyno (and their race cars).
the point being, is that it does appear that this PSI 550 kit is "VERY POWERFUL".
Yes Mark, I asked about the program and it peaks at 1.2 bar!

Marty K

markski

I had a stage 3 ecu from FVD with the fvd k24 race turbos and my dyno was very similar. I know the ECU was programmed in germany. My dyno was set up wrong as well, no fans at all on the intercoolers- just one big one in front of the car... what do u expect from a BMW race shop.LOL
I dynoed 477 TQ and 433 HP on a mustang with no side fans. so I guess I made 541 fwhp and 596 fltq... I had no other intakes or air box mods. If the dyno was correcttly set up with fans i probably would get some extras power.... I guess FVD was right on the money.

Woodster

BTW, anytime someone mentions "dips on a torque curve" pull your attention
to the EVOMS web site and the "Killer" GT700 and GT800 kits !!
these two dyno charts show this same type of dip where torque begins
to fall BEFORE Horsepower takes over !! Evidently this is not a PROBLEM as
stated previously OR EVOMS has a problem. Personally I do not believe that you would
feel the dip and may not even experience the dip in real life driving because airflow
over intercoolers, into engine/thru turbos, etc is so much better in real life. All very strong performers !! OBVIOUSLY

Marty K