I have a 12:1 408 in my heavy ass TransAm. it has a th350 with a TCI 4000 stall. NA it does OK but on spray I believe it's blowing through it. what would be a good step in the right direction? it I'm looking for mid 9s
here's a little rundown
99 TA
12:1 408
9" w/4.10s
th350/4000 tci
200-250 shot
thanks, Jason
__________________ don't believe anything you hear and only half of what you see!!
I like Neal Chance. You will definately have to go to a tighter converter with a stall of around 32-3400 with that big of a shot.
I would call Neal Chance-they spent ALOT of time with me on the phone to help decide what would work best. They ask a ton of questions so there is no guesswork.
On my old 408 I took off 8 hundreths off my 60' alone just by switching converters.
Can't hurt to call.
__________________ '98 Trans Am WS6
Cartek Naturally Aspirated Hydraulic roller 441 ci.
9.59 @ 138 1.30 60'
Best 60' 1.29
video of 9.6x passes http://uk.youtube.com/watch?v=KVdBZk5Y3s4
RIP Leo Barnaby
+1 on a Chance converter. Marty is a great guy to talk to.
I would think you would be running out of gear on the top end with 4.10's on spray with a th350.
__________________
403ci LS2, Dart CNC 225's, direct port, TH400 & 9" Chance Converter
GFORCE1320 Level 2 HALF SHAFTS and stubs
9.41 @ 144mph, 1.41 60ft on the spray, 10.75 @ 125mph, 1.45 60ft
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convrter advice needed...PLZZZ 
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