4.08 Gears + Forced Induction
 

Is it even worth it taking in to consideration the issues I will have with traction? Or should I ditch the gears and go back to the OEM setup before I even think of going with FI?

go back to OEM IMO...

Or get super sticky tires so that the bump in torque due to the gears doesn't keep you slipping looking for traction!

The shift points are not that far off

Will let you know how it works out.

i would think you would want taller gearings, not shorter...

I wish I had 4.08's.... I'm going through with 1000 more RPM left in fourth. If you have traction (strip) it's going to be easily worth a tenth or two. I'd love them.

Yeah, it would tax street tires. Too bad you can light them up in second. LOL!

Coop

Stock gearing, r888 305/30/19 rear camber -0.5. Roast thru second on a cool night. I wouldn't bother 4.08 with boost.

You are going to need slicks to grab any sort of traction. Since slicks are not legal for streets, your next best bet is to go with a nice drag radial but then again you will probably still spin through second. If you do eventually go FI, you could keep the 4.08 and see how you like it, and if you don't then just go ahead and switch back to stock or even go taller. It doesn't hurt to try and see what you like.

My twin turbo 1st gear is non existent man. Dont do it unless your going to make a track car. other then that the car pulls extremely hard. I was acually thinking of doing a 3.3 in the rear just to have more time in boost in 1st gear.

I was thinking of doing it for fun factor I bet 2nd and 3rd would be wild with 4.08's under boost

Trade me your pumpkin for my <3k mile stock one :tup: I live pretty close..

I might actually take you up on that. However, I live 330 miles south of ATX now... :ughdance:

There is one for sale locally so I could buy and ship it to you and then you could ship yours back.

short gears are good to compensate for lag

grab an open 350z diff with a 3.5 fd, drop in quaife ATB lsd, enjoy.

Lots of traction 305 35 18 MT drag radials at 12psig .
just ordered 2 new tires

Z

So you actually grabbed traction with the 4.08? Are you supercharged?

bumping this old thread instead of asking the same question. any other z boosted fanatics with 4.08 gears?

I am just about to have my Supercharger finished with 4.08 gears wth CUSCO 1.5x LSD.
I'm hoping it'll be OK with about 400 RW HP. :driving:

Not me; stick or auto? Sounds like you better get ready for A good Hole-Shot & quick shifting!

Stick...

I'm working towards BP turbo kit on my G ... Hope all this torque I may have be contained!


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I will have a similar setup with the MT 3.69 gears that are currently on my 7AT and soon to be FI TT. Maybe I can find the right combination with my gears and boost level if not I can just swap back the 3.32 gears on my auto.

Any update on the 4.08 and SC?

I am going AAM TT. After reading this thread I guess not to bother going 4.08 gears yeah? Probably better off just upgrading the stock VLSD.

After TopGunz air to air supercharger upgrade and new pulleys I'm at about 450WHP with the 4.08's and new sticky Yokohama Advan tires and new MCA (red) suspension upgrade. Yes the car is mad in 1st, 2nd and 3rd. It really is a better setup for the track than the street as it's just too easy to spin the wheels in 1st/2nd. However once you get going it really pulls. V8 utes, V8 M3 BMW's, turbo AMG Mercs and V6 twin turbo Alfa Giulias can't keep up! but I'm talking about 3rd gear runs.
I will always remember the facial expression of the dude in the Alfa Guila that couldn't pass me! (3rd and 4th gear) It was like "this can't be right":owned:
The Alfa has a little more power than me and a bit heavier (about 20hp at the crank and about 150Kg heavier) but it's my 4.08's that did the trick there I believe.

This is exactly why i wen't with a 3.3 geard quaife diff from z1, im running r888's so when the time comes to put my kit on with soho tuning it. I'm hoping to the tire angels and can get some kind of grab out of first.

May i ask why AAM and not fast intentions? also look into 3.3 gears if you are trying to keep as much traction in the beggining gears, that's what i went with.

Simple, AAM offers RHD kits where as FI does not.

I am in Australia :)

That makes sense lol, will you be like the only one in austrailia with that setup?

I very well could be the first to have an AAM kit here in Australia yes. I have been asking around the local Z communities here if anyone else has this kit but so far I have only been able to find out that just about every boosted Z34 here is either a GTM TT or SC or a Stillen SC setup.

I may ask Tyler from AAM if I am the first Aussie to see the AAM kit just so I can have some bragging rites in my hood lol