4.09 with a automatic
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
4.09 with a automatic
Anybody doing this? I purchased a dana 44 conversion with a 4.09 installed. Just wondering if anyone is doing this and also were you able to get your speedo. accurate.
Elite Torch Red Member
Joined: Sep 1999
Posts: 57,805
Likes: 23
From: Exit 89 GSP,Lakewood,NJ The Land Of Mojo
Cental/South NJ Events Coordinator
CI 1-2-3-4-5-6-7-8-9-10-11-12 Vet
CI-II Burnout & Drag Champ
St. Jude Donor '03-'04-'05-'06-'07
Re: 4.09 with a automatic (93 ragtop)
Talk to Mackey, he's running a 4.09, at first he started running a taller tire, but he's back to the 26".
Actually I just realized, you have a '93, so you would need the speedo gears, Mackey was able to reprogram for his.
Actually I just realized, you have a '93, so you would need the speedo gears, Mackey was able to reprogram for his.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: 4.09 with a automatic (Mr Mojo)
I think it really depends on your engine....I personally think that is WAY WAY to steep for a 700r4 tranny. That will put your ratio at 12.45! That is STEEP. If you plan on burning up the tires its great, but I think hookin is gonna be a MAJOR problem.
The rule of thumb is a really powerful engine only needs ~9.00 gear ratio, where a weak low power engine can benefit from a steep gear ~12.00 gear ratio.
We are able to run 3.07 gears and get awesome 60' times and good ETs as well. I think the biggest mistake guys make is going to steep with gears. It makes power band shorter/quicker and makes hookin tough.
Just my .02 :cheers:
The rule of thumb is a really powerful engine only needs ~9.00 gear ratio, where a weak low power engine can benefit from a steep gear ~12.00 gear ratio.
We are able to run 3.07 gears and get awesome 60' times and good ETs as well. I think the biggest mistake guys make is going to steep with gears. It makes power band shorter/quicker and makes hookin tough.
Just my .02 :cheers:
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: 4.09 with a automatic (ski_dwn_it)
Not to mention elevated cruise rpms. This may or may not be of concern to you. 4.09:1 is too low for MY tastes but it may work great in your circumstances. Good luck, and...
RACE ON!!!
RACE ON!!!
Thread Starter
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
Re: 4.09 with a automatic (DRAGRACR)
Well, thanks to everyone for answering. Actually I wanted a 3.73, but I got a good deal on this one. And it is supposed to have a hardened pin from toms differential installed as well. I have not had any problems with the dana 36, which is currently in the vette, but I want to try drag radials and a line lock. My luck it would break first time.
Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: 4.09 with a automatic (93 ragtop)
my combo works fine for me but the racer in me really wants 5.13 and a 30" tire.
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Team Owner
Joined: Nov 1999
Posts: 32,782
Likes: 11
From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
Re: 4.09 with a automatic (ScottsLT1)
I got my converison from "NOT JUST VETTES" got everything including new posi, all gears, and new case. About $2100. and well worth it for what I got.
