[b-on-b 5.0]

was wondering on what power gains it would be to go from the stock 55mm trottle body and egr to like a 70 or 75mm trottle body and egr on a gt40 intake and 10 psi of boost....motor is 93 cobra motor...is it worth the $200 bucks or not reli?
and anyone know what the opening end of the gt40 is in mm? (the opening where egr and trottle body bolt to)

[baine21225]

yes, upgrade from the stock 55 for sure, i think the gt40 can fit a 70 mm? i may be wrong, but i'd throw a 70 on there if it will fit

[b-on-b 5.0]

ok sweet thanx man was thinking of getting a 70mm i know the stock cobra comes with a 65mm but idk if a 70 mm would work wish someone knew the opening hole so i didnt get too big of one

[89lx]

Originally Posted by b-on-b 5.0 was wondering on what power gains it would be to go from the stock 55mm trottle body and egr to like a 70 or 75mm trottle body and egr on a gt40 intake and 10 psi of boost....motor is 93 cobra motor...is it worth the $200 bucks or not reli? and anyone know what the opening end of the gt40 is in mm? (the opening where egr and trottle body bolt to)

gt40 tube intake? 70mm is the opening on those

[Timm10221]

Originally Posted by 89lx gt40 tube intake? 70mm is the opening on those

+1 My Cobra (Same as GT40 really) Is a 70mm TB. you should notice a nice gain from that upgrade! I wouldn't go any bigger then 70mm, you don't want to create any unwanted turbulence in the air flow going into the intake manifold by having a lip where the TB meets the Intake manifold. Now a TFS intake run a 75mm

[flattusmaximus78]

I run a 75mm on a cobra intake.

[flyin ryan]

You won't feel any gain but any little bottle kneck you can resolve can only help at the end of the day especially in a boosted app.

I say if your intake is 70mm opening then go with the 70 or better.