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Building a bullet proof turbo 350



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Old 07-17-2005, 10:20 PM   #1
 
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Building a bullet proof turbo 350

I'm looking for some info on how to build a turbo 350 that will stand up to 800hp and comparible torque. I've heard rumors of drilling out the holes in the cooling band, machining the the clutch basket to accept more clutches, and swaping in a 700r4 sprag. Does anyone have a link or the knowledge to a detailed build up like this?

Thanks in advance...
Catfish
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Old 07-17-2005, 10:24 PM   #2
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why not go with a th400? you won't tear it up.
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Old 07-17-2005, 10:29 PM   #3
 
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why not go with a th400? you won't tear it up.
Couple of reasons actually. I have a good 350. I have 400s and 700r4s but they need to be rebuilt. 350s are lighter than 400s.

But mainly, the tranny guys I have talked to all say that you can actually build a 350 up to be stronger than a 400?

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Old 07-17-2005, 10:31 PM   #4
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just curious. I've never had a problem with the th350 besides cracking the case. I have at least one of them all th350, th400, 700r4, sm465. I went with the 700r4. Best 1st gear.
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Old 07-17-2005, 10:49 PM   #5
 
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Originally Posted by fulltopblazer
just curious. I've never had a problem with the th350 besides cracking the case. I have at least one of them all th350, th400, 700r4, sm465. I went with the 700r4. Best 1st gear.
I'm glad you mentioned the gears. If my sources are correct, the sm465 which I have now has a 3.58 2nd gear and that is what I have to run in to get the performance I'm after. The th350 has 2.52 1st gear stock, and I know I can go to atleast a 2.78. I can get a 3.01 first gear for the th400 but not sure if I can get that gear for the th350. Now I think I could live with a 3.01 but if I were condemed to stay in the mid 2s I would have to go to a 6.17 axle ratio to maintain my expected performance. This would require an axle swap which I am trying to avoid. My d-shafts already hate me so I'm trying to keep a solid drivetrain raito and use a 3500 stall converter agaisnt the trans brake. If I lose the raito I will probably have to go with a 4500-5000 stall to get into my power range, which will reek havoc on parts, especially if I have a dry start. Go low, start soft, is my theroy here?

Thanks for the feedback, it keeps me thinking...
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Old 07-18-2005, 05:43 PM   #6
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sounds like you've done your math. Your in a little different boat than most everyone here.
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