fatoni

Hi all. I have a 90 miata with a vvt swap (i/h/e and standalone) and 6 speed. It is basically a track only car and at the moment it has a 4.1 diff but I also have a 3.9 just sitting here. It kinda feels a bit busy but I have next to zero track experience so I dont know how my opinion will change over time. What rear end would you put in?

hornetball

iTrader: (4)

Leave it alone. Go get seat time.

pdexta

iTrader: (17)

I agree, stick with the 4.10. At your power level I would think the 4.10s are probably quicker anyway. Get out on the track and see how you like it before you mess with anything.

Dunning Kruger Affect

I know that Savington likes the 6-speed + 4.3 combo. I want to swap it into my car eventually.

fatoni

track time is definitely the priority and im working on that. ive only had this miata for a couple months though. i just figured i would ask since i own both and would rather have what is more suitable be in the car instead of in storage.

Chilicharger665

iTrader: (2)

If you are going to stay NA, they it makes no sense to go to the 3.9. Keep the 4.1 in there and go drive.

fatoni

i plan to stay na until im faster than the car which wont be for a while. the car is setup for forced induction though (forged internals, injectors, oil cooler etc) so its always a little tempting. ill keep the 4.1 in. i think the issue is that i havent had more than one track day at any particular track yet so getting a feel for the new tracks and the new car is a little bit much to be taking in at this point.

curly

iTrader: (25)

Work on your driving, but keep the 3.9, you'll want it once you go forced induction. Throw it in if you want, but it's a waste of time currently.

You'll just end up using 3-4-5 instead of 4-5-6. Shifting isn't the place to shave lots of time. Especially once you start running more power.

fatoni

good to know. im not too worried about dropping lap times. i just got the feeling from my track days that i was kind of between gears for a lot of the corners and its hard to focus on other things when that happens. i guess that just means i need to go faster and avoid the lower of the gears all together.

Seefo

iTrader: (5)

as you get faster, which gear and where you are in gear changes. the 3.9 may work better now, but it may not as you get better.

I second sticking with the 4.1 also.