Gears & Axles - Help me choose a gear 4.10s or 4.30s?
12-18-2003, 04:16 PM
Hey guys I was wondering which is a better choice 4.10s or 4.30s. I want to get my moser 12bolt soon I just need to decide on gears. I am going to be doing a lot of dragracing next year, But I also drive on the street. How will the 4.30s be on the highway at 70-75 in 6th gear? Also will a 27X10.5-15 work well with 4.30s or should I just get the 4.10s. I will have Full bolt ons, LT headers with X-Pipe, adj. QA1s all around, New T/A, LCA w/ relocation brackets, and spec Stage 3 clutch just to give you an Idea of what I will be running.
12-18-2003, 04:37 PM
If you do not ever plan on spraying, the 4:30 will be the optimal N/A gear. If you want to spray down the road, 4:10's....
12-18-2003, 11:11 PM
Not to many opinions???????
12-19-2003, 09:23 AM
I am on the fence on the gear choice too. I am planning on ordering a hybrid 8.8 with 4.10's or 4.30's. I don't plan to spray the car, but I am concerned about hitting the limitter in 4th with the 4.30's. I don't think it will make a big difference on the street in 6th.
I absolutley want 4.30's when I get my cam and longtubes, but that won't be until summer.
Do you know what mph you will hit the limiter at with the 4.30's in 4th?
12-19-2003, 09:27 AM
Do not get 4.30's with the stock cam. You will be out of the power range way too quick. 4.10's preferred.
Saw a stock cam SS with same mods as you and 4.10 Moser go 12.2 all day in 90* weather.
I also know a guy with 4.30's but his car is cammed making 403 rwhp and is full weight. He goes 11.70's and drives it everyday.
12-19-2003, 10:40 AM
I would go 4.30's and raise the rev limiter.I have a feeling you'll be adding a Cam in the future.
"Do you know what mph you will hit the limiter at with the 4.30's in 4th?"
Depends on the rev limiter. With stock height tires and 6800 RPM you'd be at 122. At 6200 you'd be at 111.
12-19-2003, 04:34 PM
do it right the first time and go with the 4.30's.
12-19-2003, 04:49 PM
So with 4.30 gears and 27X10.5X15" tires would I be able to go through the traps in 4th?
12-19-2003, 05:16 PM
the question is "what rpm will you go through the traps?"
6,800 RPM and a stock cam will only slow you down.
12-19-2003, 06:40 PM
4:30's is to much gear for a STOCK cam, even with 28's you'd still be putting yourself waaay out of the stock powerband with 4:30's. 4:10's is PLENTY, and will put you right at 5800 crossing the traps depending on your tire size. Anything over 6200 on the stock cam and you're just floating valves and hurting power..
12-20-2003, 02:13 PM
do 4.30's and a cam!!!
12-20-2003, 02:54 PM
do 4.30's and a cam!!!
Exactly if you spend the money on a rear end you got to do internal engine mods that can "use" the added gearing.
12-20-2003, 10:32 PM
Thanks for all the help guys, But I am going 4.10s because I decided to get a TNT Nitrous wet kit :devil: