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Discussion Starter #1
I have a 91 coupe with built 306,trick flow cnc ported heads,srp pistons,cutstom grind cam 500-500,edelbrock perfromer rpm upper and lower,700 mm tb,24lb injectors with pro-m mass air. has world class t-5. it currently has 3:73 in it. i was was wondering if going to 4:30 gears would be better??? also do you think i need to take the 24lb injectors out and put 30lb injectors would be better?? any help is appreciated. thanks
 

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4.30's yes....Throttle body is too big!!!!!!!!!!!!
Ya know, when i read the TB is too big statment I was just like..... here we go again!

Then I re-read the OP and laughed my ass off!

I agree, a 700mm TB is probably to big.
 

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Discussion Starter #5
26x10.5/15 tires, sorry bout the typo it is a 70mm tb. how much will the 4.30 help me out??
 

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I would say need to find a gear that will put you near shift point at your mph across the line. I am sure someone can help with that more. But you dont want to have to shift before the line and only run the next gear a couple 100 rpms. What rpm are you going across at now?
 
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