GTM supercharger DYNO
 

Yeah I figured I'd go ahead and create a new thread with for the dyno since So many people are asking for it well here it is
First 2 runs are in 4th gear
Second run is in 3rd gear
Forth run is in 5th gear
62.7 F
29.7 in Hg
Dynojet AWD dyno not the 2wd only done at P&L motorsports here in Chicago
EDIT: NO MODS THIS IS STOCK EXHAUST (no cats removed) and also the wideband was place in the rear.
http://i212.photobucket.com/albums/c...ll4Runsrpm.jpg

And to compare with the before.

http://i212.photobucket.com/albums/c...ll4runsrpm.jpg

just so people dont gotta go back and look can you list your supporting mods?

P.S nice numbers yo!

Thanks made edit on first post

No mods. This is it. Stock exhaust no cats removed.

Great numbers, Did you get the Apache sound taken care of yet lol



DAN

The apache sound has been fixed at GTM. I'm getting a new pipe. Its taking a week longer because I had my stuff powder coated. Sam is providing this at no charge.

Finnally we got the dyno. YAY lol. Numbers look great congrats.
Frank

Edit: looks like damn near the advertised numbers. Is this a custom tune or one provided by GTM and you had to flash the ECU

GTM's advertised numbers are right on spot! Good job!

I'm jealous and sad!

very nice and thanks for posting!

great numbers congrats man, any plans for exhaust upgrades?

I hope so because i would imagine those numbers would be higher if he did
Frank

Awesome numbers! Want to trade superchargers?:ugh2: it comes with 8 different tunes!

Sorry if I missed it, is this a stage 1 system? Great numbers either way, the power delivery/curve looks absolutely lovely!

It depends how far Sam has progressed on the "upper stages" of the s/c. I've made good numbers with LTH's and straight pipes thus far, I'm sure once he gets the head unit for the kit to flow enough to maintain 6-8psi while continuing to be efficient and make power I'd say we could probably get around 450hp/~400tq figures.

^ thats what I was wondering too. Is this stage 0? They advertised "Up to 450" and then the stage 1 is "Up to 500" lol. I hope stage 1 isnt stage0 + exhaust (as it normally is) because that means an exhaust is worth 80hp lol. Considering everyone else is claiming they are getting their stage 2 soon...which is supposed to make up to 550 lol. I'd really love to see that. I guess when you put "up to" before it, you can write whatever you want. Shouldve just said "Up to 600" with supporting nitrous.

Anyway, what PSI were you hitting on these runs?

I'm not too surprised, I thought it would be close with both units at 8psi. Looks pretty good for having no exhaust. I'd expect that with exhaust you'd be around where I am.

Nice numbers though. Congrats on getting rid of the flutter too. Enjoy the car.

Oh and HALLELUJAH!!!!!!!!!!!!!

good numbers. Changed my mind a bit

This is a stage 1 kit.

You know what man for real, Go some where else. Why must you bash everything that comes out except something you own or unless it comes from stillen. It is getting old, why don't you go make a bashing thread. There is no reason to turn every GTM thread and stillen SC thread into a bash.
Frank

ohhh frank.... lol


Since that was stage 1, wonder what stage 2 will handle with minor upgrades

Maintaing boost press has nothing to do with head unit (the supercharger) this is a 100% accurate information and here is why..

With the same Supercharger same pulley size that we are making 8 psi with on a VQ37VHR and making roughly 410-420 rwhp, take same setup configuration and install it on a VQ35HR engine and you will make 14 psi and roughly 475 to 487 RWHP ( we have done it ). Why ?

One engine has VVEL and the other does not.

Our stage 1 supercharger kit is sized perfectly to this engine and that is why we are getting the great torque curve and power that we are getting, Now if you ask me how can we increase the boost pressure on a stage 1 ...simple answer control The VVEL witch we are about to do that here shortly.

We just started the testing phase.

Sam

So Sam let me understand this, you are saying you have control of the VVEL
Frank

Not trying to de-rail but this is huge news

We have the tools in place and we just begun the testing phase .

Sam

Pure sex GTM FTW

I'm not sure if you're familiar with mathematics or not, but he is very clearly making 500hp. We advertise our supercharger as brake horsepower (aka at the flywheel) due to the wide variation in chassis dynos. You see, the OP posted some very useful information that you chose to ignore...namely, his stock dyno graphs on the same dyno.

So, this is where 5th grade level math comes into play...ready?

The OP made 278 whp (that's the average of the four runs posted) with his stock car. Assuming that his car was making the Nissan advertised 332bhp we can divide 278 by 332 to find out that 84% of the power is making its way to the wheels (according to the dynojet).

Now, let's take the average of the four supercharged runs which is 417whp. Now we can divide that number by 84% and guess what we get?

An average of 498 crank horsepower. Sure, 2hp less than our advertised 500bhp, but as you can see from the four runs, it is well with the standard deviation from pull to pull.

No nitrous required for our supercharger kit to make the advertised horsepower...also, no cats were harmed during testing. ;)

Thanks for the clarification GTM!

Finally someone to work on teh VVEL. Cant wait.

This is awesome!

Thanks Fezzik for posting up the dyno graphs.

Bro, you know very well those numbers are flywheel hp, not wheel hp. Why you trying to spread lies/talk sh*t?

Great numbers guys! Is this on a CARB legal kit?

Also, why is there less torque with the s/c below 2750 rpms? Is there that much parasitic loss?

Lower than what? Stock, because is has more than stock from those dyno graphs the whole time.

I'm talking about Torque. It's very clearly lower initially, particularly below 2500 rpms.

Sorry, the lines were blending together and I kept looking only at the single TQ line above the rest.
I wonder if the AF being adjusted would balance that out, it is also weird 3 of the runs are very low and then 1 is way above the rest.

haha, I will probably wait for you to get the SC first, and knowing you, you probably gonna want sell it and get something else in like a few months, and i will buy it from you. :icon17:

LOL I was just breaking his stones about this lol. I love it, but man no one on this forum gives better deals
Frank

great numbers...im very tempted to go the gtm route. Is the stage 1 kit carb legal or is it just the stage 0 kit?

It is the stage 1. I wanna say it is the carb route but being from philly i don't think you would need to worry
Frank

In regards to the initial numbers. The guy started it off mostly at 2500 rpms when recording so there will be inconsistancies. The highest torque I had in the low end (2500rpm) range was with the supercharger in 4th gear. 25 torque more

What you are seeing is due to the dyno operator starting to record the dyno run without going wide open throttle, Here is an example of where the torque at at lower RPM . this is an in house install that we are just rapping up.

Sam

Cant wait for next spring now to see/hear your car without that noise.... This time I may steal it :)




DAN

In that case I may leave the flutter so I can find it when you do :driving:

Will be posting a video with the new bypass valve shortly, just waiting on You tube to upload .

Stay tuned

Sam