Which gears?
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Joined: Sep 2002
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From: Effingham IL
Which gears?
Well I am doing everything else what the hay. 6 speed, H/C, projected HP 400-420 Tr224/112 with decent TQ on bottom. If I go with 4.10s will I have to feather the throtle to avoid massive wheel spin? Which unit will have the best durablity? I understand Getrag makes the 3.73s dont they make our stock 3.42s? Which gear will is the whiniest?
Thanks
Greg
Thanks
Greg
Team Owner
Joined: Mar 1999
Posts: 28,753
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From: San Jose/Bear Valley CA
CA Events Coordinator
Re: Which gears? (cmeb4dk)
I have had 3.42's and now have the 3.73's. Neither of these gear sets make any noise. True the 3.42's are made by Getrag but the 3.73's are shot peened for better quality.
Its a hard choice to make... when in doubt, just add more HP!! :eek:
vetterdstr :cheers:
Its a hard choice to make... when in doubt, just add more HP!! :eek:
vetterdstr :cheers:
Burning Brakes
Joined: Aug 2001
Posts: 1,206
Likes: 21
From: Roswell GA
Re: Which gears? (vetterdstr)
The beauty of a mn6 is you select the tranny gear. There for why limit your choices by selecting too low a rear gear. With the 4.10's if you think they are reving too high just shift up to the next gear, and when you want more pop down shift.
No amount of shifting can make 3.73's be 4.10's.
No amount of shifting can make 3.73's be 4.10's.
Team Owner
Joined: Mar 1999
Posts: 28,753
Likes: 9
From: San Jose/Bear Valley CA
CA Events Coordinator
Re: Which gears? (cmeb4dk)
When I went to the 3.73's I purchased the entire carrier. I bought it through a GP from TByrne. At that time the gears were not available by themselves like they are now. What I am actually thinking of doing is to install a M12 and Z06 3.42's. :)
vetterdstr :cheers:
vetterdstr :cheers:
Melting Slicks
Joined: Jan 2002
Posts: 3,419
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From: Arlington TX
Re: Which gears? (vetterdstr)
When I went to the 3.73's I purchased the entire carrier. I bought it through a GP from TByrne. At that time the gears were not available by themselves like they are now. What I am actually thinking of doing is to install a M12 and Z06 3.42's. :)
vetterdstr :cheers:
vetterdstr :cheers:
Platinum Supporting Vendor
Joined: Sep 2001
Posts: 5,730
Likes: 267
From: VENTURA Ca
Re: Which gears? (los7883)
By the time you buy gears, bearings etc and the labor to install it all in the case... it's just better to buy one already built. I've had a couple built and it cost as much as buying a built unit. I have 4.10 s in stock and can get you other ratios.
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Thread Starter
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Joined: Sep 2002
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From: Effingham IL
Re: Which gears? (MelloYellow)
No doubt the 4.10 will be the best for the track. My concern second to performance is driving at 75 to 78 mph. I would like to be at 1800 or so rpms. Driving 200 miles ar 2100 rpms might take cockpit noise a bit overbearing. For this reason I am leaning towark 3.90 or even 3.73s.
What would my mph be at 80 mph with these gear choices? Seems like it is 1650 with stock 3.42s.
Thanks,
Greg
This became evident to me after doing my homework last night. Thanks all the responses and thanks for the info yesterday Andy!
Greg
What would my mph be at 80 mph with these gear choices? Seems like it is 1650 with stock 3.42s.
Thanks,
Greg
This became evident to me after doing my homework last night. Thanks all the responses and thanks for the info yesterday Andy!
Greg
Safety Car
Joined: May 2000
Posts: 4,808
Likes: 344
From: Albuquerque NM
Re: Which gears? (cmeb4dk)
Well, I have a simular motor, just a LITTLE milder cam, but respectable power, and traction is a problem in first and second. With 3.73:1 gears and 335/35-17 fairly sticky tires I have to baby it off the line. Then, after I'm hooked and running good at WOT, at about 4800-5000 rpm it breaks the tires loose again!! I don't dare powershift to second, it just fishtails halfway through. I can't imagine how you could hookup on street tires with a 4.10:1 gearset :eek: If yours turns out anything like mine, the 3.73:1 gears are a better choice. Besides, you can get them NEW, with shotpeened gears like on the Z06, so they're plenty strong. :chevy
Thread Starter
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Joined: Sep 2002
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From: Effingham IL
Re: Which gears? (6Speeder)
6 Speeder,
Fish tailing down the track was my concern. I am used to shifteing just short of power shifting, sounds like i am going to have to modify my technique and feather into it through 3rd. What rpm are you at in 6th at 75 to 80 mph?
Thanks for the speedy response
Greg
Fish tailing down the track was my concern. I am used to shifteing just short of power shifting, sounds like i am going to have to modify my technique and feather into it through 3rd. What rpm are you at in 6th at 75 to 80 mph?
Thanks for the speedy response
Greg
Safety Car
Joined: May 2000
Posts: 4,808
Likes: 344
From: Albuquerque NM
Re: Which gears? (cmeb4dk)
Well, my rear tires are a little shorter in diameter than stock (26.3 Vs. 26.7) but I am turning about 1900 at 80 in 6th. It is a very usable gear at those speeds :D
Thread Starter
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Joined: Sep 2002
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From: Effingham IL
Re: Which gears? (cmeb4dk)
Well I have decided to wait on the gears. I want to wait to do them till I get to go for a spin in cars with different gearing. Also I want to see my dyno gragh and run it at the track with 3.42s so that I can get some idea whether 4.10s would have me shifting into fifth at the traps.
Thanks for the input thus far, keep it coming as I am only putting off getting the gears at least until someone comes up with a hardened output shaft for the short side. I figure I can save some on labor having it all done at the same time. On the down side will I need to reprogram with LS1 edit?
Greg :chevy
Thanks for the input thus far, keep it coming as I am only putting off getting the gears at least until someone comes up with a hardened output shaft for the short side. I figure I can save some on labor having it all done at the same time. On the down side will I need to reprogram with LS1 edit?
Greg :chevy
Le Mans Master
Joined: Oct 2001
Posts: 5,577
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From: Southern Maryland Maryland
Re: Which gears? (cmeb4dk)
If you only plan on doing heads and cam I would go with 4.10s. If your future plans might include nitrous then go with 3.90s. As far as drag racing goes 4.10s is the right gear if your sticking to 346 H & C all motor. I found that 346 H & C + nitrous with 4.10s is too much gear for the traps(shifting to 5th). I am running 3.90s and can trap in the low 130s spinning the motor.
Phillip :seeya
Phillip :seeya
