PDA

View Full Version : TH400 swap


Fire67
11-10-2006, 04:02 PM
Hello all!
This is my first post here, stumbled across the site a while back and registered but never posted till now.
Ive been searching the net high and low looking for a solution to this so I figured posting up somewhere new would help find me something...

Im looking for a flexplate for the swap. I know company's make LT1 specific counterweighted pieces... And I know that any 153tooth flexplate with the center bore and bolt circle for 86-96 SBC will work.
But my motor requires a neutral (internal) balance flexplate.

But I need one with the dual bolt circles (10.75 and 11.5) for my 6lug converter. Ive been able to find ALOT of external balance flexplates with the dual bolt patterns, just cant seem to find a neutral balance, 153 tooth, 1pc seal, dual pattern flexplate.

If you know of anyone that can or does do this let me know. So far Ive only found one close from Meziere and they would have to custom machine the second bolt pattern in for me bringing the price to $400 :eek: before shipping. Im not about to spend that much money on a flexplate!

The reason I want to use both bolt patterns is because Im going to be launching off the trans brake @ 4000rpms with a supercharged 383 making about 800fwhp.
Thanks in advance,
-Justin

sleepyTA
11-11-2006, 11:17 AM
Well i know this isn't wasn't what you were wanting. But when i had my motor built they neutral balanced my flywheel. So you might keep that in mind if all else fails and you can only find an external balance flywheel

Fire67
11-14-2006, 10:38 AM
Yeah, my motor is neutral balance... Ive found Meziere and CSR are both willing to drill there neutral balance, 1pc seal, 153tooth flexplates for an additional fee. The only problem being the price. Im not about to pay someone $400 for a flexplate. Especially when I can buy one (minus extra bolt circle of course) for $75-150...
Just hoping someone else had a solution.

sleepyTA
11-14-2006, 01:22 PM
You must be running alot of power to need dual bolt circles on a flywheel, but i should have known that since you are also going to be runnin a 400 tranny

performabuilt.com
11-16-2006, 04:12 PM
most aftemarket replacement flex plates will have the dual pattern ,