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Old Jun 27, 2008 | 08:25 PM
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I am planning (and collecting) several mods to be done at one time. I have visited with Anthony at LG Motorsports and want to hear from y'all to see if anyone has done this and what I can expect in gains...

I currently have a bone stock 2003 coupe with 2.73s

My plan is the following...

I picked up a 3.15 differential from another Forum Member
LS6 intake
LG Street headers and high flow cats
Corsa touring cat backs
And a tune from LG to bring it all together...

Anyone give me a guess what this will produce?

Thanks in advance!
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Old Jun 28, 2008 | 08:40 AM
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Even if you only got 350 rwhp you need to get it done and then plan the blower install
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Old Jun 28, 2008 | 08:47 AM
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That's a good set up.

However I suggest that if you are going to pay the labor for the gear swap you should go with 3:42s instead of the 3:15s.

You can pick up a used 3:42 pumpkin and sell the 3:15 so the added cost will only be a couple hundred bucks and the added enjoyment will be worth a ton.
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Old Jun 28, 2008 | 09:13 AM
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Originally Posted by Vega$Vette
That's a good set up.

However I suggest that if you are going to pay the labor for the gear swap you should go with 3:42s instead of the 3:15s.

You can pick up a used 3:42 pumpkin and sell the 3:15 so the added cost will only be a couple hundred bucks and the added enjoyment will be worth a ton.
I will take that under consideration. I failed to state that I was swapping the TC for a stock GM truck converter (Gm part # 24208645). I think Mike Mercury has a thread out there saying that it will bump the stall up 3 - 500 RPMs over stock. I do not want a high stall seeing it is a daily driver. With the TC swap and the 3:42s I think your right about the "fun factor" going up.

If you are running 3:42s, are you still getting good gas mileage?

Last edited by Logansar; Jun 28, 2008 at 09:25 AM. Reason: corrected info
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Old Jun 28, 2008 | 09:27 AM
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Originally Posted by Logansar
I will take that under consideration. I failed to state that I was swapping the TC for a stock GM truck converter (Gm part # 24208645). I think Mike Mercury has a thread out there saying that it will bump the stall up 3 - 500 RPMs over stock. I do not want a high stall seeing it is a daily driver. With the TC swap and the 3:42s I think your right about the "fun factor" going up.

If you are running 3:42s, are you still getting good gas mileage?
Mileage is about the same.

BUT with the mods your Right foot will get heavier.
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