Gear ratio recommendations?
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Joined: Nov 2001
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From: Gary, In
Gear ratio recommendations? With my mods I was thinking of going 3.73's but actually read with a 3000+ stall it would only make about .1/1mph difference? Or would it be more since I have a cam and other mods now? And yes, I'm stuck with the stock 10 bolt for now, but will upgrade to better axles and either studs for the caps or a cover with cap supports. I rarely take the car to the track and I do know a A4 is easier on one, so that's what I'm stuck with for now at least.
Ok I didn't even see your signature the first time. Won't be a big difference from a 3.23 to a 3.73, but it will be a little snappier. As far as track times, there's no hard and fast rule. It should help a little though
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From: Gary, In
I was just wondering because of the cam, it's not real big but I was thinking the power band is gonna be higher now and the 3.23 might be hurting it. I didn't realize that a converter will actually take away a lot of the gain a gear swap would give.
A GOOD convertor will gain more than a gear swap would.
3.23s' to 3.73s' would gain .1-.2 sec. A good convertor(such as Yank SS3600/4000 or CircleD equivalent) with 3.23s' could gain a full second over a stock convertor.
What are the specific details of your Midwest 3200. There seems to be a variety available on the Midwest site.
And gains are strictly dependent on traction.
3.23s' to 3.73s' would gain .1-.2 sec. A good convertor(such as Yank SS3600/4000 or CircleD equivalent) with 3.23s' could gain a full second over a stock convertor.
What are the specific details of your Midwest 3200. There seems to be a variety available on the Midwest site.
And gains are strictly dependent on traction.
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from your 2002 post/thread,
I Finally got to take the car out since getting the Midwest 3200 verter in. It's going to take some getting used too with it revving higher to get it going but I'll get used to it. And the launch is waaaay different from stock. With the stock verter I hardly spun the GSC's from a dead stop. now I have to let off the gas as the car goes sideways. Time to get the nitto's mounted then get it to the track.
revving higher ? A good convertor shouldn't rev much more than it did before the convertor. Sounds like it might be 'loose'.
I Finally got to take the car out since getting the Midwest 3200 verter in. It's going to take some getting used too with it revving higher to get it going but I'll get used to it. And the launch is waaaay different from stock. With the stock verter I hardly spun the GSC's from a dead stop. now I have to let off the gas as the car goes sideways. Time to get the nitto's mounted then get it to the track.
revving higher ? A good convertor shouldn't rev much more than it did before the convertor. Sounds like it might be 'loose'.
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Verdad Gallardo Thread Starter
TECH Apprentice
Joined: Nov 2001
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From: Gary, In
from your 2002 post/thread,
I Finally got to take the car out since getting the Midwest 3200 verter in. It's going to take some getting used too with it revving higher to get it going but I'll get used to it. And the launch is waaaay different from stock. With the stock verter I hardly spun the GSC's from a dead stop. now I have to let off the gas as the car goes sideways. Time to get the nitto's mounted then get it to the track.
revving higher ? A good convertor shouldn't rev much more than it did before the convertor. Sounds like it might be 'loose'.
I Finally got to take the car out since getting the Midwest 3200 verter in. It's going to take some getting used too with it revving higher to get it going but I'll get used to it. And the launch is waaaay different from stock. With the stock verter I hardly spun the GSC's from a dead stop. now I have to let off the gas as the car goes sideways. Time to get the nitto's mounted then get it to the track.
revving higher ? A good convertor shouldn't rev much more than it did before the convertor. Sounds like it might be 'loose'.
Wow! I can hardly remember typing that! Yeah, it definitely revs higher than the stock one did. I would say it's a loose one as it takes more pedal to get it going under part throttle and when it shifts, the tach hardly moves.
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From: Schiller Park, ILL Member: #317
Yes, you read correctly that gains are limited to about one tenth of ET reduction with a 3.23 to 3.73 swap behind an LS1/4L60E combo with a ~3000-3500 stall speed converter already in place. But, as mentioned above, that's dependent on traction. You might run the same (or slower) if you don't have enough tire to take full advantage of the new gear ratio. But one tenth of reduction is about the maximum benefit you can expect if everything else is ideal.
A converter swap to ~3500 stall speed or higher will negate most of the ET reduction of any gear ratio change within the 2.73-3.73 range with an LS1/4L60E combo. Once you have a stall speed in that range (or higher), you'd really need to consider a 4.10 or numerically higher ratio to see significant ET reduction on top of what the converter has already provided. On the other hand, if you still had the stock stall speed, a gear ratio change from 3.23 to 3.73 (or especially 2.73 to 3.73) would be worth considerably more in terms of ET reduction (but still not as much as doing a ~3500 stall speed and keeping the stock gears).
A converter swap to ~3500 stall speed or higher will negate most of the ET reduction of any gear ratio change within the 2.73-3.73 range with an LS1/4L60E combo. Once you have a stall speed in that range (or higher), you'd really need to consider a 4.10 or numerically higher ratio to see significant ET reduction on top of what the converter has already provided. On the other hand, if you still had the stock stall speed, a gear ratio change from 3.23 to 3.73 (or especially 2.73 to 3.73) would be worth considerably more in terms of ET reduction (but still not as much as doing a ~3500 stall speed and keeping the stock gears).
Thread Starter
TECH Apprentice
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From: Gary, In
Well, seems like I have to decide between sticking with the stock 3.23 or jumping to a 4.10? A 4.10 is gonna hurt me for sure as far as traction goes with the new mods (nittos hooked great the way it was)
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From: NEPA
IF your interested i have 3.73s in my car now but need 3.23s for my specific build. Im running a th400 turbo 5.3 and need all the top end i can get lol. If yours are in good condition ill trade you 1 for 1. Just pay your shipping ill pay mine. Let me know.
If you're pretty sure you'll spin a lot more with the 4.10's then either get a stickier tire or simply forget it IMO. Because you'll actually run slower most likely