First off, let me say, this is my first non-Mustang "sports car" I have owned, so please forgive my ignorance about the car. I just bought a 2003 350Z 6 spd Touring with a Vortech supercharger/intercooler on it. I was told by the guy I bought it from that the car has 500 hp. I told him over the phone that I found that hard to believe without a built motor, (and at only 10 lbs of boost). When I went to look at/buy the car, he showed me a dyno sheet, but it looked very generic, (no shop name, no vehicle printed on it, etc...). The car has headers, mid-pipe, utec, 650cc injectors, fuel rails, walbro fuel pump, and I think that is about it for engine mods.


My question for you more experienced Nissan guys is what would you give as a ballpark guesstimate for this car given the mods on it. I a nmot asking you guys to dyno the car over the computer, just give a rough guess what you think it should be. The car does feel pretty quick, but not that quick.

One last thing, who tunes these cars with utec? Keep in mind I am in Gainesville, and don't mind driving to Tampa, just would like to not go too far.

 

First off, I like you avatar. OooRahh! Second off, it is not out of the ordinary to make that much power out of those engines. It sounds like it was done right. Worst case scenario is you take it to a dyno and it only makes 450. But have fun and congrats.

 

Do you seriously think this setup would make 450? I was thinking it was maybe 300ish. I would definitely take 450. I think I am going to take it to the track real soon. That will tell alot. Although, this thing will not hook to save it's life.

On that issue are there any issues with the IRS running slicks, (actually MT ET street radials)?

One more thing, are there any other things I should do to the car right away? I guess what I am asking is are there any common things that go bad that I should go ahead and upgrade/replace?

 

Should be at least 400whp sentry65's Vortech Supercharged 350Z - FreshAlloy.com Forums

BTW: It was built to corner not "hook" so you'll have to do some work there if that is your goal.

 

+1 Also check if the transmission has been replaced as the 03/04 models had weaker tranmissions than the later models. Not sure if you can check maintenance history by VIN via the dealer but the part number for the new transmission is: CD009 I believe (which is a much stronger unit than the original).

You should be able to run slicks with the stock diff and all just fine. There are overheating issues with the stock Diff during prolonged periods of extreme use i.e. road racing... don't believe you should be having those same issues on 1/4 mile strip though. Although i wouldn't recommend turning it into a single purpose car (drag queen) as they are meant for much more than just driving down a strip in a straight line.

 

touring

 

Does anybody know who tunes these cars with the Utec?

 

why is it hard to believe they make 400 with a supercharger? they are just under 300 factory......

 

You're probably looking at 500hp at the crank, or roughly 435whp. That's should be well within reason for 10psi on a motor that made 287hp crank to begin with. UTEC for these cars is pretty neat. I have no idea who tunes them around here, though. You might try a forum like my350z.com for that info.

That tranny and diff should hold that power without a problem. You might get some wheel hop, but most of the Mustang IRS rules apply there (solid bushings). By the way, welcome to a modern chassis that doesn't need subframe connectors. This is one of the stiffest chassis that Nissan makes. One last note, the limited slip diff isn't like your stang one. The basic Nismo diff is a clutch-type unit, where the stock one uses a viscous coupling.

 

In our area ? Check with performance factory (it is in orlando) Performance Factory . Not sure of any other places locally that tune UTEC's.