Am I gonna be happy with the 2.93 gearing with a ls swap or should I be looking for something different? I'm using a 5.3 with a t5 transmission.
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2.93 gearing with ls swap
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Originally posted by sgtskid View Post
The factory 2.93 open diff wasn't going to cut it. I wanted something that would make better use of the engines power and the transmissions gear ratios. I created an excel sheet that gives the approximate RPM for a given speed in any given gear on the trans.
I assumed that max hp and TQ would be between 4500 and 5000 rpm and set the "rev" limiter to 6400. I settled on a LSD 3.73.
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It depends on what transmission you're using. You said T5, but there are a lot of ratio options. Any production T5 is going to be marginal behind a 5.3, especially if you mod the engine and have good traction.
3.73 is way aggressive for that much torque in that light a car with tires as short as an E30 has to run.
LS1 Camarobirds and C5/6/7 Corvettes have a 2.66 first, but 3.42 rear with much taller tires than an E30.
I like tall gears, so I'd set it up for 2000 RPM at 80 MPH if feasible.
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It depends on what transmission you're using. You said T5, but there are a lot of ratio options. Any production T5 is going to be marginal behind a 5.3, especially if you mod the engine and have good traction.
3.73 is way aggressive for that much torque in that light a car with tires as short as an E30 has to run.
LS1 Camarobirds and C5/6/7 Corvettes have a 2.66 first, but 3.42 rear with much taller tires than an E30.
I like tall gears, so I'd set it up for 2000 RPM at 80 MPH if feasible.
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Go with the 2.93 if you have a 6-speed T56. This is because the 1st gear is low enough
to compensate for the 2.93. More importantly, the pinion gear teeth are bigger and stronger than those of higher-ratio differential gearing like a 4.11.
Our 2.93 - T56 cruises at 1200 rpm at 60mph, but will still spin the tires on dry pavement at 60 mph in 3rd gear.E30-LS1 aka. 357is
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Originally posted by garretvs View PostGo with the 2.93 if you have a 6-speed T56. This is because the 1st gear is low enough
to compensate for the 2.93.
Originally posted by garretvs View PostOur 2.93 - T56 cruises at 1200 rpm at 60mph, but will still spin the tires on dry pavement at 60 mph in 3rd gear.
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