Alberto, did you buy the 3.3 FD at function tuned or somewhere else? With 355 whp would a 3.3 FD be a bad idea? I'd much rather go through the traps at the drag strip in 4th gear rather than having to go into 5th, but with the lower hp, it might hurt me in quarter mile times.

 

Exactly...

I swapped out the rear differential early last year, one of the best mods I have done!!! At 600whp, there is no power loss whatsoever, but a ability to stick some of the power to the ground...

Godd write up, interesting info on the mathematical top speeds of each gear, tempted to go top out 6th 200+mph here I come (j/k- not on these streets)

I can still slip the tires in 4th if they aren;t warm

-TODD

 

Many guys will be willing to trade rear diffs, if someone has less power, they will gladly give you their 3.3 for your 3.5 (and vica versa)..

anyway, if anyone needs rear diffs and can't find a trade..talk to Jim at turbotoys in FL...he has plenty of these in stock!

turbo_toys@hotmail.com

 

What do you trap and do you run a raised redline? I was going through the traps in 4th with the TN at around 7000rpm's, that was 114-116mph. If you have the stock limiter thats only 112mph in 4th so Id hope you would need a shift to 5th. I really hate the 4-5 shift, on all of my tranny's it has felt like it wasnt aligned right and therefore I dont powershift this gear, I feel its my slowest gear change, so Id avoid it like the plague for a quick 1/4 time. Your centrifigal S/C also has much less TQ than a turbo though so the lower gearing may make the car feel really sluggish. Honesty I drove Nowell's TN set-up @ around 400whp and while it was nice I would of taken my 3.5 FD on that set-up anyday, felt much nastier <---no offense Nowell!

Oh and yes I bought the diff off Dave @ Fuction....

 

Nice man....Your write up is exactly what I thought and felt after I installed my 3.3 Nice man enjoy it. I miss my Z

 

Thanks man, what did you end up getting into? A C6 Z06?

 

bigslim350Z, if anything you would want to stick with the 3.5 final drive or possibly switch to the 3.9 final drive. The 3.9 makes an assload of difference with a centrifugal SC, especially one like yours that isn't making really huge power at the moment. You'll have 10.7% more gear torque going to the wheels in each gear and 10.7% higher in rpms at a given speed (except for right after a shift point) which means you'll be higher in boost at the same speed for most cases

when cars start getting a ton of power with a turbo setup, the 3.3 is usually a better choice, especially if traction is being lost in lower gears. Because turbos can build full boost so low, running 5.1% longer gearing means being 5.1% lower in rpms at the same speed and that's just not as much of an issue when you already have full boost

 

Sickness... so now when I come home you can take me for a REAL ride.

 

Hehe cute pic.. looks like you guys were playing "pass the metal ******* around and becareful not to let it touch the ground" game

 

Yeah you will be able to feel the pull this time and not just the spinning

 

Not yet....Investing in some real estate and getting a 2007 g35 sedan..Due to a baby on the way. But I will have the new HR motor and a 6speed.

 

What is the over/under on how long before the sedan has performance mods?

 

3.9 + procharger = fun.

My buddy has a ati procharged Z and he just upgraded to a 3.9 and it has returned the livelyness of the car.

 

Dave and Juanito -

How about a set of 4:10s in my rear? (not like that silly)

I need to break 11.5 in the caddy

 

Ewwww...bad bad mental image

 

My rear or the caddy running low 11's?


PS I shot another message off to Peter at APS .....


i think the Twin Turbo Caddy should be fun and why were at it might as well bump it up to a 402

 

How much does this caddy weigh? What do you trap?

 

Holy crap, you go through cars reeaal fast. What was wrong with the vette? That wasn't fast enough for you?

 

Alberto i have a question?
when swaping diffs no need for retuning or atleast a lil final touches?

 

Dave @ Fuction did a diff on a TN Z the day before mine. He told me his tune changed some after 5500rpm's-I didnt encounter the hiccup when driving this car though. My car everything was good, part throttle was just as before and WOT was just as nice, no hiccups/stutters...Id imagine if you did need to "retune" it would be very minimal.