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2.88 jag rear
Anybody run a close ratio top loader
with a 2.88 jag rear, gimme the ups and downs. |
You better have an engine that is totally docile. First gear will be good for 70+ mph at 6000 rpm. :eek:
Which means that at a 1000 rpm creep, you'll be going 12 mph. Lots of clutch slipping at takeoff, and likely a few embarrassing bucks and stalls. |
Pat, Bob is right...I have a close ratio with a 3.31 rear and love it, but my big block has mucho torque and I still need to pay attention when taking off. I don't recommend anything lower than 3.31 w/a close ratio...
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Thanks Bob, what about a wide ratio top loader.
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Hello pathenry,
Here's a good use for a 2.88: a 521/C6/low stall (2000-2200rpm) converter. Plenty of torque and a good idle. It'll light'em now from a 5mph roll all the way up if you want to. With a manual trans you'd need a pretty big, tame engine to have an easy time on the street. Bonneville would be pretty good though :p Tom |
I have a Hunter Cobra with a 85 vette rear end that came out of a automatic car. It came with 2.73 rear gears and it was a bear to launch with my 5.0 motor. With my SD T-5 trans(2.95 first gear ratio) it was good to about 55 in first. I rarely used 4th and the overdrive 5th was useless at anything under 80. I changed to 3.73 gears and what a differance. The car launched so hard with the new gears I found out I needed jet extenders in my carb. This never happened with the 2.73 gears.
I agree that with a manual trans you need gears over 3.00 and a 3.31 or 3.55 would be perfect with a big block. To figure out the final gear ratio multiply your first gear ratio by the rear gear ratio. Here is an example: my old setup 2.95(first gear) X 2.73(rear gear)=8.054 motor rpm to one wheel revolution my new setup 2.95(first gear) X 3.73(rear gear)=11.004 motor rpm to one wheel revolution |
Pat,
Our preference is to use a 3.31 dif with the wide-ratio Toploader. A 3.07 dif is about as low as I would combine with a 427SO and wide ratio trans. |
2.88 Jag Rear
With respect to your question of using a wide ratio toploader and a 2.88 Jag rear, if you do the math this combination would give a 1st gear ratio of 8.01 to 1. In comparison a typical 3.31 rear with a close ratio toploader would yield a 7.68 to 1 ratio. The 2.88 rear would have numerically more "grunt" in 1st with an engine loafing direct drive in 4th. The only major drawback I can see would be losing the "kick in the ass" accelleration in your top gear. Personally I like the 3.31 with close ratio combination. Good streetability and performance - Aggressor
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You know......It's really not bad, I built a torker motor that plays out at about 6000. No bucks or stalls and when it hits
about 1800 rpm, it's a rocket. |
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