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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

what convertor

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Old Mar 26, 2009 | 06:40 AM
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Default what convertor
Trying to help a buddy decide on what convertor to run behind a LT1 with a th400. It currently has a 4500 stall in it, and it is starting to blow through the convertor. He is spraying the car also. Can anyone suggest what brand and size convertor would be best to run in the car? We were thinking that the 4500 is way too much convertor. Any help is appreciated.
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Old Mar 26, 2009 | 11:28 AM
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what is done to the car like heads/cam? also what gear and tire size? there are nitrous convertors out there that have a anti-balooning plate so that could be a route if he sprays on a regular basis and not just once and a while, let us know what mods and we can help you better...
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Old Mar 26, 2009 | 12:42 PM
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Originally Posted by ninety4three4
what is done to the car like heads/cam? also what gear and tire size? there are nitrous convertors out there that have a anti-balooning plate so that could be a route if he sprays on a regular basis and not just once and a while, let us know what mods and we can help you better...
The car is a 383 with stock heads with alot of work and C/I. I am running a Th400 3.73's and a 26x11.5. The motor was built for the gas..
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Old Mar 26, 2009 | 12:50 PM
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i'd try a 3800 or 4000 lol but i dont know **** lol
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Old Mar 26, 2009 | 01:12 PM
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Who the hell sprays a 4500 converter and expects it NOT to be blown through?!
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Old Mar 26, 2009 | 01:14 PM
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Originally Posted by blackz93
Who the hell sprays a 4500 converter and expects it NOT to be blown through?!
THAT IS WHY I AM CHANGING IT...DAMN I THOUGHT YOU WOULD HAVE FIGURED THAT OUT.....
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Old Mar 26, 2009 | 10:00 PM
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unported heads?

what cam specs?

I'd imagine for a stock heads car with n2o a 3000-3400 would be a decent fit
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Old Mar 26, 2009 | 10:21 PM
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Call up the guys over at Yank Performance. They will get you dialed in.
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Old Mar 26, 2009 | 10:43 PM
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Originally Posted by myltwon
unported heads?

what cam specs?

I'd imagine for a stock heads car with n2o a 3000-3400 would be a decent fit
the heads are heavily ported and flow around 300. The cam specs I don't know, it was a custom ground. But I do know that it is close to the cc306 with I believe a 114 lobe seperation. I could be wrong, I would have to double check with my buddy for the exact numbers.
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Old Mar 26, 2009 | 10:44 PM
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Originally Posted by blackz93
Who the hell sprays a 4500 converter and expects it NOT to be blown through?!
it was in the car when he got it.
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Old Mar 26, 2009 | 10:47 PM
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Originally Posted by 95greenmaro
the heads are heavily ported and flow around 300. The cam specs I don't know, it was a custom ground. But I do know that it is close to the cc306 with I believe a 114 lobe seperation. I could be wrong, I would have to double check with my buddy for the exact numbers.
I'd say somewhere around 3500 more or less depending on amount of nitrous of course

I'm no huge convertor setup guru though just a guesstimate
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Old Mar 26, 2009 | 11:07 PM
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Originally Posted by 95greenmaro
it was in the car when he got it.
Cool... he's excused.
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Old Mar 27, 2009 | 10:01 AM
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Call Circle D they make a great converter...
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Old Mar 27, 2009 | 10:21 AM
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Originally Posted by vanilla89
Call Circle D they make a great converter...
that is what we have heard from several people. I think that is what he is going to end up doing.

Appreciate everyones help.
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