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MS4 is 410 gears the right choice?

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Old 10-03-2007, 09:51 PM   #1
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Question MS4 is 410 gears the right choice?

i was talking with some older racers and i have a m6 with ms4 etc... but i am going with 410 should i have gone bigger with a 10 bolt rear for now?
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Old 10-04-2007, 03:22 PM   #2
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bump any one
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Old 10-04-2007, 07:17 PM   #3
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Im going with 4.30`s.
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Old 10-04-2007, 07:21 PM   #4
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Ive heard from almost anyone on here that at least 4.10 is great for an M6. I've also heard it turns first into a granny gear
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Old 10-04-2007, 11:04 PM   #5
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i really like my 4.10's... but yea first gear is almost pointless... unless im on an incline i usually pull out in 2nd
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Old 10-04-2007, 11:49 PM   #6
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4.10's at most! Unless you got a really tall tire! I think 3.90's are the best so you dont have to run a taller tire and shift into 5th b4 the finish line you can hold 4th and thats what you want
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Old 10-05-2007, 06:08 AM   #7
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4.10's at most! Unless you got a really tall tire! I think 3.90's are the best so you dont have to run a taller tire and shift into 5th b4 the finish line you can hold 4th and thats what you want

He will be fine, with the cam, he si going to rev higher at the finish line, as long as he doesnt exceed 130 mph (at 7k) then he doesnt need to move up from the 26" tire.

As for gearing, due to a Fbody t-56's tall 1st gear and the marshmellow aspect of the cam in the low end, 4.10's is ideal. What would be more ideal would be the same cam and gears and swap in a GTO tranny, now that would cut some killer ET's
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Old 10-05-2007, 08:51 AM   #8
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4.10s 4th gear max is 116-120 depending on your revlimiter. Im a cam only car pulling 118 om 1/4 mile so if i throw heads on my car i would have to get a taller tire or drop down to 3.90's gears.
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Old 10-05-2007, 09:10 AM   #9
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Quote:
Originally Posted by DansRedz28 View Post
4.10s 4th gear max is 116-120 depending on your revlimiter. Im a cam only car pulling 118 om 1/4 mile so if i throw heads on my car i would have to get a taller tire or drop down to 3.90's gears.
Rev limiter exactly, most people do not keep the stock limiter in place of a cam swap, most turn the wick, up and rev out to 7k, unless the clutch is slipping a 26" tall tire can do 130mph. with a 4.10 gear. H/C in most cases wont exceed that.

@ 6000 rpm rev limter, 26" tall tire, 4th gear 1:1 max rpm is 113mph
@ 7000 rpm rev limter, 26" tall tire, 4th gear 1:1 max rpm is 130mph

Borg Warner 6sp T-56 Gear Ratios
1st 2.66:1
2nd 1.78:1
3rd 1.30:1
4th 1.00:1
5th 0.74:1
6th 0.50:1

http://www.f-body.org/gears/

My best bud does 117.5 in the 1/4 cam only and has no issues with the limiter, because it was turned up. on a 245/50-16 nitto.
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Old 10-05-2007, 04:44 PM   #10
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4.10's will be perfect.

The only thing is that the 4.10's for 7.5" 10-bolts are cut thin and are more prone to breaking compared to a 3.73 gear for example.
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Old 10-05-2007, 05:35 PM   #11
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Mine is 6800! 7,000 is crazy on stock rod bolts hell 6800 is pushing it LOL
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Old 10-05-2007, 05:44 PM   #12
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That is that accurate! Because i have 3.43's right now and it only pulled 145mph on the revlimiter! It says 152mph with those gears at 6800 rpms And my 3rd gear pulls 110mph and it says 117mph so it is about 7mph fast! I have checked what my car pulls gear to gear with hp tuners and on the dyno and what my car dose is 7mph slower then that site shows
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Old 10-06-2007, 02:56 AM   #13
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Have 3.90 gears now in my 10 bolt and m-6. they are ok. I opted for 4.30's in my new 9" I ordered today. But I am running 275 35 18's on the rear of my car.
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Old 10-06-2007, 11:48 AM   #14
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i am using a full man auto, but heads, 4:10, MS4, and 28" tires. I lock the converter in 3rd and 131 mph in 1/4 at around 6800... I think.

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Old 10-06-2007, 03:25 PM   #15
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Raising the rev limiter sounds great, but you want the car to go through the lights right around your shift point. Whether it is 5600 or 6800 doesn't matter, you need to keep the rpm in your power band, over revving the car too long will cause you to lose performance.

4.10's with your application and performance levels at this point will work great.
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