Bmr4life

Did you even read my post? I thought you did since you quoted it, but it appears you didn't.

wayne613

That's it, 1 man card taken away...

As to OP, ditto on Bmr4life's statement. 3.73 or 4.10 as I really wouldn't even consider 3.90, as they're not offered by FR(as also stated by others). From what you're saying, highway isn't an issue, so I'm another +1 for 4.10 FRPP all the way, which seems to be everyone's consensus.

Love mine. Even when I occasionally have to deal with it suckin' it down like an alcoholic at an open bar when on the highway for any prolonged period.

adidasUNT8

4.10's are fun, but if you plan on going FI at some point, I wouldn't recommend them at that point. They are fun on naturally aspirated cars, but you will just be sitting there spinning if you plan on going Supercharger/Turbo at a later time.

SON OF 68

Agreed. I wanted to go 4.10's on my car, but was talked out of it.
1) I do a lot of highway driving.
2) I am going to supercharge the car.

The main reason they had for going 3.73 was the plans of FI. I'm still happy with the 3.73's as well. It's a nice all around gear, and pretty friendly on the highway. I still have a pretty good pull from 65-70 in 5th gear. At around 80 mph, I'm turning right about 2500.

Bmr4life

The other problem I had with 4.10s was pull at highway speed. Punching it at 70mph dropped me into 4th and left me struggling to speed up. With the 3.31s, acceleration was way better at that speed.

chris09

i say 4.10s if you stay under 450 whp, 3.73s if your over that. my first gear is so short and usless that somtimes i just skip it all together. highways with 4.10s is no problem for me. i can still do about 120 in 4th gear.

Blacksmoke

Yes I read your post...
But I did not see where you stated what gear you went from to the 4.10's.
That is why I asked if you thought such a tiny difference in gear ratio would make a difference on the singing.

Now I saw just now you talking about 3.31's. That is quite a bump compared to the difference 3.90's to 4.10's would produce with singing.
Get what I'm saying? If he is choosing between 3.90's and 4.10's if there was that issue it would more than likely be present with BOTH gear ratio's since they are so close.

Are you feeling a little moody? LOL
A bit snappy there my friend.

Bmr4life

I'm not moody, but you're still not reading what I posted. Go back and read the very first line I posted (which you quoted). I said the same thing you're saying so I'm not sure why you keep defending how close 3.90's and 4.10's are.

Norm Peterson

There is only 5% difference between them, so rpms at any given speed and even acceleration isn't going to be hugely different. In virtually all cases, you might as well go with the FRPP 4.10's.

The only times you might choose 3.90's would be if you absolutely need to avoid an upshift that would be forced by the 4.10's but not the 3.90's, and there aren't very many situations where this is likely to occur.


Norm

Blacksmoke

Ah I must have misread you. Gotcha.
I thought you were not comparing the closeness and just saying what you got with 4.10's vs. 3.31's.


My bad there!