Gear recommendation

572nova · 10-11-2016, 03:54 PM

I have a 69 nova weighing 3100lbs with a 572 crate engine using a TH400 with a Dana 60 and a 4.10 gear. I have a 2 speed PG with a 1.80 gear set I want to try in the car. I was thinking of using a 4.56 gear but was wondering if anyone could give me any recommendations for a gear ratio when switching from a 3 speed to a 2 speed? Thanks

prostockpete1 · 10-14-2016, 01:46 PM

Almost 300 looks & nobody has not any info / data on this gear / trans swap ? wheres all the geniuses out there that mite have wondered the result changes

james schaechter · 10-14-2016, 04:41 PM

Quote:

Originally Posted by prostockpete1

Almost 300 looks & nobody has not any info / data on this gear / trans swap ? wheres all the geniuses out there that mite have wondered the result changes

Anyone with Prostock as their first name should have something for him. LOL!

Ed Wright · 10-14-2016, 05:18 PM

Which Stock or Super Stock class does that run? Might not find anybody here running anything like that. Ya think?

572nova · 10-14-2016, 08:36 PM

I don't run a stock or super stock class. I just figured I would ask the question here thinking that lots of super stock guys may have tried changing from 3 speeds to 2 speeds or vice versa. Talking to some racers the most common answer I have heard is to go up a couple of gears ratios when changing to a 2 speed.

HandOverFist · 10-15-2016, 01:21 AM

Quote:

Originally Posted by 572nova

I don't run a stock or super stock class. I just figured I would ask the question here thinking that lots of super stock guys may have tried changing from 3 speeds to 2 speeds or vice versa. Talking to some racers the most common answer I have heard is to go up a couple of gears ratios when changing to a 2 speed.

I think I would just try what I had first then make the decision. You will then have your own data base of sorts and will not have cost you a dime...of course torque convertor selection rears it's head as well.

Dave Turner · 10-15-2016, 10:38 AM

Quote:

Originally Posted by prostockpete1

Almost 300 looks & nobody has not any info / data on this gear / trans swap ? wheres all the geniuses out there that mite have wondered the result changes

Who is this guy??... so impatient!

Bob Mulry · 10-15-2016, 02:57 PM

Maybe you should try posting this question on the correct form, such as Bracket, Top Stock or .90's tech section and take ProStock with you......................

572nova · 10-16-2016, 11:56 AM

Quote:

Originally Posted by Bob Mulry

Maybe you should try posting this question on the correct form, such as Bracket, Top Stock or .90's tech section and take ProStock with you......................

New to the forums here Bob and just thought that stock and super stock racers might have done more swaps. I will give the other sections a try. Thanks!

tim worner · 10-16-2016, 12:07 PM

With all that torque and a big tire I would think a 4:56 would work . I'm sure you don't want to wind her up to high in the traps.

10-11-2016, 03:54 PM	#1
572nova Junior Member Join Date: Oct 2016 Posts: 9 Likes: 0 Liked 0 Times in 0 Posts	Gear recommendation I have a 69 nova weighing 3100lbs with a 572 crate engine using a TH400 with a Dana 60 and a 4.10 gear. I have a 2 speed PG with a 1.80 gear set I want to try in the car. I was thinking of using a 4.56 gear but was wondering if anyone could give me any recommendations for a gear ratio when switching from a 3 speed to a 2 speed? Thanks

10-14-2016, 01:46 PM	#2
prostockpete1 Member Join Date: Mar 2012 Posts: 228 Likes: 3 Liked 71 Times in 43 Posts	Re: Gear recommendation Almost 300 looks & nobody has not any info / data on this gear / trans swap ? wheres all the geniuses out there that mite have wondered the result changes

10-14-2016, 05:18 PM	#4
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 389 Times in 168 Posts	Re: Gear recommendation Which Stock or Super Stock class does that run? Might not find anybody here running anything like that. Ya think? __________________ Ed Wright 4156 SS/JA

10-14-2016, 08:36 PM	#5
572nova Junior Member Join Date: Oct 2016 Posts: 9 Likes: 0 Liked 0 Times in 0 Posts	Re: Gear recommendation I don't run a stock or super stock class. I just figured I would ask the question here thinking that lots of super stock guys may have tried changing from 3 speeds to 2 speeds or vice versa. Talking to some racers the most common answer I have heard is to go up a couple of gears ratios when changing to a 2 speed.

10-15-2016, 02:57 PM	#8
Bob Mulry VIP Member Join Date: Apr 2002 Location: Coarsegold, CA Posts: 1,017 Likes: 57 Liked 321 Times in 101 Posts	Re: Gear recommendation Maybe you should try posting this question on the correct form, such as Bracket, Top Stock or .90's tech section and take ProStock with you...................... __________________ Bob Mulry 7516 STK A & M Motorsports

10-16-2016, 12:07 PM	#10
tim worner Senior Member Join Date: Jan 2002 Location: duncannon Posts: 838 Likes: 14 Liked 126 Times in 20 Posts	Re: Gear recommendation With all that torque and a big tire I would think a 4:56 would work . I'm sure you don't want to wind her up to high in the traps. __________________ Tim Worner SS 1747