Hey Mr.Squeeze you seem to know alot about the supercharger. Im currently at 390whp.
1.) how much more power can we get with a 9 psi pulley?
2.) My auto guy said changing to stillen cats with another tune, we might get 30 or even 40whp?

thanks man!

Wow, its got a nice set of bearing in there.

What type of dyno did you get the 390WHP on was is a dyno jet?

If I had to take a guess I would say about 30 or so, I am not a 100% sure because I haven't used the pulley my self yet. My numbers are without using that pulley.

I also have never ran cats on any of my supercharger set up's I alway use test pipes.

i used mustang dyno. wow the difference in our power is very big though hahaha

geoharto, I only made 400whp on a mustangdyne. Then I went to a dynojet and made 455whp.

My power is on a dyno jet if it was on a mustang if I had to take a guess more in the 410-420 range.Sounds like you have a pretty strong car time for some upgrades man.

The thing that bugs me about your car is your dyno jet SAE numbers compared to what my SAE number were.

oh i see, then we are almost close, thats nice to hear thanks!

well ive finally tuned it got some more parts installed, swift springs, whiteline sways, h&r spacers. im pushing 451 whp dont remember the torque 9.1psi, im getting some codes - multiple misfires, and o2 sensor codes. any thoughts?

i see alot of people tune their supercharge 370z with 91 or 93. is it ok to use 98? i would assume you would get better performance. also with the new impeller whats the difference between the clockwise and anti clockwise, and please dont say one spins clockwise and the other anti clockwise lol. which one suits the stillen kit?

I would take the car back to the person that tuned your car. Check the plugs for the misfires codes. If you installed test pipes without tricking your 02 senors this would throw a code for that.


Hey Reldas the higher octane that you use the better it will be to prevent knock.

Hey Reldas the higher octane that you use the better it will be to prevent knock.[/QUOTE]

The problem I see here is that if you tune for 98 octane you would have to always run that octane or you would have problems. And I have not checked the price of 98 recently but I am sure that would be expensive to run all the time increasing your HP to $ ratio.

i always run 98, cost me $1.50 a litre he in australia. 95 cost me $1.30 so extra 20c. is worth it

That makes a difference. here in the states 93 is what you find most common and to get the higher octane you must drive out of your way to get it and it also costs on average 1-2$ more per gallon.

here we have 91 95 and 98 at every petrol station

That must be nice. I would have to drive 20min to get the higher stuff. With using 98 you should be seeing at least 10WHP or more over what others are getting with 93. All I would wonder about is running higher than 93 all the time would it mess up anything. This is about the time the smart guys on here need to chime in.

His 98 is comparable to our 93 I believe.

Yes - see post #279 in this thread:

http://www.the370z.com/forced-induct...elease-19.html

so bob, if our 98 fuel is rated at 98 RON, thats comparable to you 93?

RCZ loved his kit so much, he sold it about a year after.

I know I bought it:happydance:

Yes - that is correct.

i dropped down to the 9lb pulley
next i will look into going with a larger pulley on the backside the one that connects to the blower pulley that was vortech advice and of course the 928 impeller
and with a little meth injection she should be making some good power throught out the power band

Nissan370 on what kind of dyno are you using to get your HP?

dyno pack

He sold me his RE-11's, you think it says something bad about the tires? Or, maybe it has something to do with the fact that he wants an M3 and parted out his car.

Um Nismo, you aren't quoting the PM dyno are you? They have a very giving dyno, they know about it too and they'll tell you that their final numbers are not the point but rather the deltas when using their dyno for tuning purposes.

Nice numbers man, I'm getting my Stillen SC installed in the next week and the will be out to Kaizen for a tune.. Mustangs are good dynos IMO. True numbers.

Yes if you run HFC's or TPs you should see another 30 WHP.

That's not true on our cars, with TPs he will actually prob see a loss of HP due to the valve overlap.

Who told you that? numerous people and tuners I have talked to said there is 10-20WHP to be added with TP's or HFC's,. Lets not count the numerous dyno sheets I have seen where guys are making 10-20 more WHP and WTRQ more than me and the only thing different they have are TP's or HFC's.

WOW mis-facts are nice. :/

You get the bonus from changing HFC's on an NA car but some say you loose it with an FI setup due to blow through due to valve opening overlap. I think there was some supporting dyno's for this theory but can't remember where.

In general or specifically on our engine? Check out the numerous GTM stage 1 SC threads, there was actually an entire thread dedicated to trying to get more power out of the SC with exhaust. Due to VVEL the intake and exhaust valve overlap is too aggresive for an FI application and causes us to loose boost through the exhaust. For example I'm running the 928 impellar AND the 9 psi pulley and I'm barely breaking 9 PSI on my Stillen kit with full exhaust

??? So Will I have issues with boost on my car with just a CBE? Thanx for the info.

Since you posted before I could find the thread, here it is:

http://www.the370z.com/forced-induct...w-f-i-lth.html

No, you won't have issues you will just make less power. Do some research, a lot of us run full exhausts with FI and are still getting great numbers.

Ya overlap is a problem but guys are still making great power
This is a short run I did with the 9lb pulley,HFCs and cat-back
Yesterday.
http://m.youtube.com/index?desktop_u...&v=tuXUrZEMl3c

Just like the post above your making less power per psi then a vehicle with same setup but control over the cams

Youre hitting 11 psi with the 9psi pulley? Dang, I may have to take off my ART pipes. Nice placememt of the boost gauge, it's the same spot I put my wideband.

however you should note that any increase in temp of exhaust gases will in the long term destroy your stock cats, they simply aren't built for the heat. People have been using catbacks. You should be ok with TP's and not see any loss in power but big issue was matching F.I. + VVEL + aftermarket headers.

Thanx for the post , But that was about FI and headers.. Even Stillen on the website says not to run the kit with headers.. Not sure if that was before or after the guy blew his car up after installing headers on his car with the Stillen SC.

That is my setup, I made about 20whp less on the top end that GTM does with stock cats & aftermarket exhaust I believe, but I match point to point throughout the power band until 7k which is because of cam tuning we believe, no one knows 100% if this is true or not yet.
Also BladeZ has a very good point, FI is not meant to be run with stock or aftermarket cats for extended periods of time. You will burn up the cats and can actually clog the pipe causing major issues.

That engine still has missing info, from what we know the headers were put on the car but the system was never retuned which will cause problems when adjusting flow like that.
Headers can run with either SC kit, both neither company will guarantee better/equal whp numbers with short or long headers as the kits were never tested with those modifications.