why not 3.90's?

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12-17-2005, 01:55 AM

#11

JoeyD

3rd Gear Member

Join Date: Aug 2005

Location:

Posts: 665

RE: why not 3.90's?

Hi fast,
Yes reason many turn away from 3.90's is due to the simple fact that FRRP doesn't make that ratio.
PERSONALLY I would rec. FRRP 4.10's for you. if you have a manny tranny.
I assume you do? but I dont see a SHORT THROW shifter listed in your mod list.
So if you do, I would get 4.10's, big DR's (BFGs are awsome) in the back, and LC arms... short throw shifter ---FOR NOW.
if you have an auto... I would get 4.30's, big DR's, and LC arms... stall converter ---FOR NOW.

you will see the times drop with these mods for sure, good choice.

12-17-2005, 02:58 AM

#12

mustang_montana

4th Gear Member

Join Date: Feb 2005

Location:

Posts: 1,907

RE: why not 3.90's?

i got 3.90s cause i got a twins crew blower going on VERY SOON

so i wanted inbetween 3.73s and 4.10s. if the traction is too bad with the 3.90s ill just deal with it.

12-17-2005, 04:14 AM

#13

nanaki

Retired MF Moderator

Join Date: Aug 2004

Posts: 14,891

RE: why not 3.90's?

Quote:

ORIGINAL: mustang_montana

i got 3.90s cause i got a twins crew blower going on VERY SOON

so i wanted inbetween 3.73s and 4.10s. if the traction is too bad with the 3.90s ill just deal with it.

hahaha! IF it's too bad? traction is horrible with a KB or even just the eaton on a cobra with 3.55s. you're doomed! [:-]

12-17-2005, 05:37 PM

#14

JD1969

Pro. B.S. caller outer

Join Date: May 2004

Location: IL

Posts: 9,644

RE: why not 3.90's?

Quote:

ORIGINAL: freeunit

Why doesnt anyone ever get 3.90's? is it because if your going to get those you might as well just get 4.10's? I think i have a better chance at getting 3.90's than 4.10's because my dad had 4.11's in his chevelle and hated them so i think he might let me get 3.90's is that a bad idea? Any help is appreciated...

Thanks Brian

Your dad did'nt have an overdrive trans in his Chevelle, this is old school thinking at it's best, you cannot compare the two cars like that, there are too many differances. If you have traction problems then you need to dial in the suspension and get better tires.

Quote:

ORIGINAL: nanaki

hahaha.. get some DRs and you MIGHT. control arms aren't going to give you better traction, they'll help with the hippity hop when you're changing gears though.

Actually they can. Adjustible control arms can let you set up your instant center and pinion angle which can help plant the tires (or if done wrong, unload them)

12-17-2005, 06:12 PM

#15

mustangman02232

6th Gear Member

Join Date: Dec 2004

Location: Ludlow, Mass

Posts: 15,864

RE: why not 3.90's?

the chevelle was a classic, the transmisions all have different gear ratios as well as rear end ratios, if your staying N/A, foxes do 3.73s, SN-95s do 4.10s, and 05-06s (not sure on platform number, but i think its DEW-90) do 4.30s,