Hey, I just recently got my car supercharged and was dissapointed with the results. I have the V1 kit, cattman y-pipe, and 2.5" exhaust. My dyno run showed 202.2 hp and 187.3 tq. I thought that with my current set up i should be making more power. Not anything ridiculously high, but i thought maybe more around 230-250. I noticed on the dyno it showed my A/F dropped significantly after 4000 rpms. I'll attatch the dyno if i can. Any help on what may be wrong or what i can do to get the most out of the supercharger would be appreciated.

 

Dang. That's not much more than what a NA Maxima makes. Did you put the SC belt on? Is it tight? Who did the install?

 

oh, i forgot, its a 97 auto tranny...yeah, the belt's on and its tight. I got it done at Balanced Performance in Buford, Ga (close to Atlanta)

 

A fuel delivery problem maybe? Show us the dyno and afr graphs. Also if you can take pictures of the intake pipe routing and fuel lines, that may help. Something has to be wrong with the install. Your SC is basically not doing anything.

 

there's obviously something wrong, but the car doesn't have any leaks and still runs fine. The A/F starts on the graph at about 15:1 and at 4500 rpms drops off the chart, below 10:1. I haven't been getting much feedback on other sites as to what the best method for gaining more power with this set up would be. I've been reading the threads on here, but there's so many options and im not sure which one is best for what im trying to accomplish...

 

i have the dyno, but i don't see an option to attatch it...

 

You can't attach. You must get a host. I am interested in learning the results of this.

 

email it to jmerchan @ hcsus.jnj.com (no spaces) and I post it

 

me too. i'm slowly getting my S/C plans into motion. i need all the input, problems, and their solutions i can handle.

 

jeffeson, i tried emailing my dyno to you, but it said the address wasn't valid...is the email in the post correct?

 

nevermind, i just sent you my dyno, thanks for posting it for me

 

 

Man, and I thought mine was pretty bad for an automatic:

 

You're running WAY too rich!

Fix your A/F problem there and you'll probably gain 40-50hp.

 

The V1 has a smaller internal gear ratio than the V2 so that my account for a less power between them due to the lower boost even with the same pulley size.

But yes, it is running very rich... use a smaller pulley

 

What FMU disk are you running? 10:1?

What PSI level?

You seem to not know many details, where did you get the "kit" from?

 

that's one of the richest running cars I have ever seen!!!! you will easily gain 40-50whp if you get that AFR up to around 12:1 or so ideally...

 

its a kit from stillen, im pretty sure its the 8:1 disk, but not positive. Its at 6psi...im looking into getting the apexi SAFC to try and fix my A/F ratio

 

You may want to check the disc, and perhaps drop it to 6:1. The 8:1 is too high unless you've upgraded the pulley which it doesn't look like you have. The AFC may not have enough adjustment range to get that A/F up where it needs to be.

Almost as bad as when I first put in my 370's and the emanage wasn't working right, I dyno'd 91 whp on the first pull

 

I was running that rich as well....I was going off the chart at about 3.5K though...but I still put down 27x hp (3.125 pulley).....you could possibly have a boost leak ontop of running way rich

 

I'm definitely putting in the Cartech after the Sept 11-12 DNBC auto X & shown n shine meet and getting it tuned.

 

i think im gonna go with the SAFCII and get the car dyno tuned where i got the supercharger installed and see how it goes from there. Thanks for the help everyone

 

That will help, but you should really use the SAFC for minor adjustments, not major ones like this will require. Do you have a fuel pressure gauge? What is the fuel pressure at redline?

Also, what size injectors do you have?

 

S-AFC is a tool for fine tuning, and will likely not be able to cope with gross overload such as seen here. You've got to find an alternate way, possibly a 6:1 disc, to dial back how much fuel is being dumped.