4.30s to be or not to be
 

Would you get 4.30s on a 4V if you had to swap them out later on in about 2 years or less due to a SC?

what kind of supercharger? you're going with positive displacement right? dont do the 4.30's get 4.10's at MOST and leave them in when you get the blower. you will be shifting your a$$ off with 4.30's. if you're going with a centri blower then i think you can get away with leaving in the 4.30's

i say this because there's not a big enough difference between 4.30's and 4.10's performance wise to make it worth paying for the work twice. but 4.30's will definitely be a lot for a positive displacement blower.

its a 4v dont get anything less then 4.10's.

I would do the 4.30's and if it turns out ot be to much then regear it later on. the 4v loves to rev :)

you dont have gears do you?

i know the 4v loves to rev but you gotta love to shift when you have 4.30's... with a positive displacement blower you are gonna have a hell of a time keeping traction in any gear. i have enough trouble with traction with 4.10's and drag radials. i cant imagine a car with that much power and 4.30's. just my opinion.

I want to have some fun with it being NA for now I dont mind paying for a gear change later on. If I have 4.30 now then later on I swap it for 4.10s then its not worth getting the 4.30s however if I get 4.30 now then later on 3.73s then I think its worth paying 2nd time for the gears, what do you think? I want to say KB setup later on but nothing has been finalized but that is what Im leaning towards.

in my opinion, which may be different from other forum members, 3.73's arent enough gear for a 4v. and there's no point in switching from 4.30's to 4.10's, there's just not enough of a difference to make it worth the money. so with that said, if you think you're getting a kenne bell i would put in 4.10's and if you think you're going with a centri bower then i would put in some 4.30's and leave them in there.

have you driven a car with 4.10's or 4.30's? if you're at the tms show and you havent done your gears yet, ill let you drive my car just so you can feel the gears. even though yours will like to rev more, it will give you an idea.

[QUOTE=floppy]in my opinion, which may be different from other forum members, 3.73's arent enough gear for a 4v. QUOTE]

I agree....I have the stock 3:55's in my mach and I know for sure 3.73's wouldn't be enough gear for a N/A 4 valve. I would say 4:10's, but you might also want to consider 3:90's.

My mach is begging me for 4:10's, but I fear the gear! ha ha ha

OK, here comes the conservative guy of the group. If you're going to put a positive displacement blower on, don't go any higher than a 3.90. Centrifugal, I think you can get away with 4.10's. The positive displacement just makes so much torque on the bottom end there's no way you'll ever get it to hook without a full rear suspension setup and drag radials or slicks.

that may be true but i'd much rather have to feather the clutch and have a nice strong mid range to top end charge than have all the traction in the world and not enough power up top...

with the 4.10's once you did get it to hook, what a wild ride it would be. lol.

if you've got a 4v....get the 4.30's you'll regret it if you don't. You won't mind the shifting that much believe me and you will pull like a bat out of hell!

btw i run 4.30's with my procharger p1-sc and it's fine....if you run roots or a small pulley, you may want to go 4.10...definitely nothing less in a 4v tho

just my .02

Good friend of mine just got 4.30s in his 01 N/A Cobra (337RWHP) with BFG DR's. He's a very expereinced stick driver and such, he told me the other day he ran it up to 7K RPMs accidentally.

Obviously, it'll rev quickly.

If i had a 03-04 Cobra, 6 speed, hell yeah i would do 4.30's. or just a 6 speed in general. 5 speed and supercharger...no

I was also told it has to be .18 increase to feel a difference.

I dont want to fear the gear and I know that Ill be shifting more, no time for scratching :banana:. I think the best bet would be 4.10s since KB makes so much power down low. Im not sure if Ill be going to the TMS show this time as its my wifes birthday and I dont have the stang. It will just make me more depressed watching everyone with their stangs.

Im planning on a beefed up t56.

4.10's and call it done. 4.30's are not enough of a diff to justify the expense twice. If you're going to do that then do 4.56's and watch your times drop.

still say 4.30's.

the difference is you have an extra gear before OD. With the 5 spd, you end 4th gear and DROP you dont accelerate much(if at all) but with 6 spd, you have 5th gear to do some more damage and THEN you got OD

Try it and find out, if it sucks then just switch em.

great idea, all he needs is to spend lots of money for little results. he's trying to plan ahead.

yeah... just pick one and stick with it. You'll like either of them. 4.30's may be too much for guys like me but you might just love them. Once you pick one, just stick with it.

Just like a few others have said, 4.10's with a positive displacement...4.30's with the centri. I run 3.73's in mine currently and I hate them!!! Switching to 4.30's and I'm going fi via a Novi 2k.

4v's love the gear. Every guy i have talked to says 4.10's and no less no matter the mods on 4v's lol. Seems ot be the norm with you 4v guys.

Hey, Thanks Floppy!!

:)