Yeah, It might be mine. There are a few more floating around, but I have the most documentation posted on it. GTM said they ran maybe 5 pulls to hit 550whp on my car. They said it was surprisingly easy to get it to make power. If I tuned my meth for the car, I could possibly push another 40whp out of the setup with no changes.

If you go for a 4.2 build and drop compression to around 10:1, get the smallest pulley and either run E85 or meth, you might break 700whp.
The superchargers are rated for 800bhp, so 700whp is making more than that.

 

hope you dont break a rear end or snap a drive axle.... at that horse power.... remember the more power you make the more your car will find something weak for it to break

 

Just curious, were did u get that info about 625 - 650. it sounds good to me I heard there was testing done that pushed that stock trans to 700. At that point I think the trans took a dump. that's why I want the upgraded trans from GTM. For 6G's that trans better be able to handle 600-700 WHP without a problem until some mileage is piled on.

 

Shop that built the motor stated a long block build, CP pistons 9.0:1, Eagle Rods, ARP main studs. They said 600 - 700 WHP no problem. originally it was supposed to be with the GTM twin turbo kit. Then the twin supercharger came out from GTM and we switched to that instead. The shop told me no problem reaching the same horsepower goal. I'm just looking to have one of the baddest *** AWD G37 sedans on the street.

 

i work for infiniti.... so i have done plenty of testing with both the GTM and the Stillen kits...both make virtually the same power only one is a little more reliable with the different intake manifold.... if you think 6k is worth it then knock yourself out lol but to be honest you'd have plenty of power at 625-650 to the tire... then you know your drive shaft and rear end get destroyed

 

do you have the stillen or GTM supercharger? What is your opinion on the more reliable kit. I wasn't sure if u were referring to stillen or GTM

 

Sorry, but this whole post is incorrect, except comparing the base GTM kit. I've never seen a Stillen SC kit break 500whp. The most I've ever seen was 485 on race gas. The stage one GTM SC is comparable in power to the Stillen unit and I would bet my house it's more reliable. There's no plastic to be found on this kit, the MAF's won't be maxing out from undersized intake tubes either. You also get a air to air FMIC instead of a watercooled unit that can't support much more than the kit was designed for. The GTM kit at least has more concrete upgrade options. There are three different versions of the single SC GTM kit. Stage ones are usually hitting 420-450whp. Stage 1.5's are making 475-515whp. The stage 2's are making 475-540whp. I quote 540whp as it Staples achieved it on meth. Then you can really throw your money into the pond with the $10,000 twin supercharger kit and that will take you as far as your motor can.

So to put it bluntly, your driveshaft isn't going to snap. HP doesn't break much stuff, it's torque man and 350-400lbft isn't going to do it. And the only kit out of the five I mentioned even capable of 600+ "to the tire" is the twin supercharger kit and if you plan on pushing that much, it's going to cost you more than $6,000... more like $24,000 to do it right. I spent $20,000 and that's without building the motor.

See below for examples. Be mindful of boost numbers vs power numbers.

(Stillen kit, stock or Stillen exhaust, stock cats )


Stillen kit with 928 impeller upgrade and maxing out the MAF's


(GTM Stage one, stock exhaust, stock cats)


(GTM stage one, stock exhaust, stock cats)


(GTM stage 1.5, stock cats, F.I. exhaust)


GTM Stage 2 stock exhaust, stock cats, no meth


(GTM Stage 2, test pipes, Invidia Exhaust, meth)


GTM Twin Supercharger kit, PPE LTH, MD Y pipe/HFC, Tanabe Exhaust, no meth on 92mm pulley. They go down to 84mm...)

 

Wow!!!! How much you got into the build? This can't be a daily driver can it?

Edit: ok I saw 20k!!!!! Wow!!!!

 

just a quick note, I have seen stillens with 530whp just fyi. just with headers, exhaust, and the small pulley with the bigger injectors and mafs

 

hey Jack, I got more than 20 goin into my build. Gtm twin supercharger, gtm stage 4 trans, built motor and meth kit

 

I'd definitely like to see more info on this if you have it.

 

Well here is what I can find with a quick look:

Alvin’s Badass 450whp Stillen G37 : OnPoint Dyno = 450whp

JerseyG37s has almost 500whp so he quotes he even quotes with the E85 tune he was pushing 527 to the wheels.

That's with 2 min of looking. That is with not doing anything too crazy.

 

450WHP is not out of the ballpark. I've seen a few make that much with a 9lbs pulley and impeller upgrade. 500WHP though, I'll take with a grain of salt until I see a dynojet reading in std. If he's running 9lbs and making 527whp, thats approaching turbo efficiency on race gas. The Fast Intentions kit made 550whp at just under 10 lbs on I believe 100 octane. Every supercharger kit I know needed 11lbs or more to break 500whp.

 

I am almost at 450 and I am a G35. I find out my numbers at the end of the month. The G37 should see that easily

 

i never said GTM wasnt a good kit.... and maybe im miss reading but their overall product and customer service sucks.... lets be completely honest here you call stillen and your kit is shipped in 24 hours you order a GTM kit good luck getting it before next new years eve comes around... and fitment on 90 percent of there stuff doesnt fit well or has to be modded.... ive bought several things for my GTR customers that come to me and i ALWAYS have to send them out to be machined and fitted correctly... its so bad that even my performance shop i used to tune and do all major builds wont even touch a car with a GTM kit.... opinions are opinions no problem i got yours but that stillen unit makes up to 13-14 PSI so that kit with a built motor and trans can make well over 500 WHP believe me or not... will not bother me one bit ill continue to use the stillen kit because they are more reliable and whenever i have a question about a product i can have an answer at a drop of a hat...hope this helps dont want to argue something that has already been beaten into the ground just stating real life experiences