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Joined: Apr 2002
Posts: 151
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Joined: Apr 2002
Posts: 151 |
I'm sure this has been discussed somewhere here before, but I haven't been able to find it. I'm running a 261 bored to 270 with a mild cam, two one's, etc. with a T-5 behind it. Can I get any idea from some of you members to tell me how a 2004R behind my 261 would help or hurt the performance of my vehicle comparatively speaking. Thanks!
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Joined: Jun 2007
Posts: 1,411
1000 Post Club
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1000 Post Club
Joined: Jun 2007
Posts: 1,411 |
When you say performance, how do you intend to measure it?
1/4 mile times, fuel economy, easier on your left leg?
Buffalo sells what it takes to adapt one in, so all we need is to know, to help you, is why you are interested in switching from row your own to automatic.
My, what a steep learning curve. Erik II#5155
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Joined: Oct 2002
Posts: 230 Likes: 2
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Joined: Oct 2002
Posts: 230 Likes: 2 |
I just resently switch my T-5 for a 700R4 with the help of Tom Lowe. I have a 261 ci bored, cam, 4 barrel. With the T-5 I had a 2.73 gears in it because I do a lot of highway driving. Tom Langdon suggest using 3.55 to 4.11 axle ratio with the 700R4 or 2004R to get the maximun performance. So far I'm very happy with the 2.73 ratio. It doesn't lug the engine in town and out on the highway I can run 75 MPH at 1,800 RPM's. And that's what I was looking for.
I don't know much about the 2004r but I don't think that you will lose any performance with it.
Never thought that I would be happy not shifting the 53, but I guess old age has caught up with me.
Luke Lucas I.I. #516
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Joined: Apr 2002
Posts: 151
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Joined: Apr 2002
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The T-5 ended up being a full time job for my right arm. I don't mind rowing, but I like to use both arms, so my choice now is to not use either arm! I'm interested in being able to get out of the way when I need to and to be able to jump on it and it react reasonable well. I don't want a drag truck, but one that will keep up with the traffic and sometimes pass the traffic. The main stuff with the engine will be a full pressure 1962 261 with .060 over aluminum pistons, milled head, McGurk Super Comp CH-213BB cam, aluminum pistons, Mallory HEI, balanced and polished, rework valves, milled head, 2 X 1 intake, Fenton headers.
Last edited by 6cylindersovertexas; 04/05/13 12:25 AM.
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Joined: Jan 2002
Posts: 138
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Joined: Jan 2002
Posts: 138 |
You need to pick your unit carefully. GM made a lot of these and some of them aren't very strong. I'm using one from an '85 Monte Carlo 5.0 (non SS) between a mild 292 and 3.50 geared 9" Furd and couldn't be happier. I sent you an E with the info I have.
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Joined: Aug 2008
Posts: 87
Active BB Member
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Active BB Member
Joined: Aug 2008
Posts: 87 |
I run a 700r4 behind a 270 gmc with 370 gears and 25 in. tall tires and its just about perfect. I would like to try some 390s as I could be a little lower geared. I can't imagine using 273 gears that's awful tall gearing for the lock up clutches.
Last edited by badsix; 04/19/13 10:11 PM.
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