Posts: 72
Joined: 1/20/2003 From: United States Status: offline
i put a 70mm TB on my 5.0 and was wondering if that's too big. my car has 1 5/8 equal length shorties and an H-pipe so i figured 70mm would b ok, what do all ya'll think, or hopefully know.
Posts: 282
Joined: 3/7/2003 From: United States Status: offline
Like I said in the other post, you would benefit more from a 65mm on a pretty much stock car than you would a 70mm. My friend has a 306 w/ f-cam, Powerheads, RPM intake, 76mm MAF, 24lbs-ers, full exhaust, and 3.73's. His car got considerably faster when he switched from a 70 to a 65
Posts: 282
Joined: 3/7/2003 From: United States Status: offline
You can bolt it on, you do have to get a bigger spacer, or bore out your stock one. You don't *have to*, but anything you feel on a stock car, which won't be all that much, will be even less w/o a matching spacer.
Posts: 82
Joined: 7/24/2003 From: United States Status: offline
I have a 70 mm throttle body with a trick flow inathke manifold, with bbk equal lenth headers, o/r h-pipe will the 70 mm hurt the car? would a 65 be even better? Im also thinking about the future when i get a bigger motor and things like that.
buzz 60 mm
unless you has a larger mass the bigger T/B won't help
if you have a 70mm egr spacer you can put on a 65mm T/b as I guess you have opened up the hole for the 70mm already
I used a 75mm on a supercharged car with a 90 mass
nothing bigger than a 65mm unless you have headsvfast37843.9480787037
Posts: 7
Joined: 8/11/2003 From: United States Status: offline
I have a 93' with a 70mm w/equal length headers, high flow cats and 373's...Made the modifications about 4 years ago which abled me to run consistantly around 14 flat ... Now w/over 170,000 miles and the same modifications w/the exception of a new altenator and waterpump the car will still run consistant between 14.2 and 14.4 ... Guess I'll never know if the car would have turned better times with a 65mm, but one thing is certain - it didn't hurt anything - engine and heads are still stock and running strong w/the exception of an issue w/the clutch
dblack....you really would never know until you compare for yourself..it may help a .10 or .2..have to had to time the engine lately..I'd say if it's a stock chain you need to change it and pick up a .10
clutch? what's the deal with it? I bet your cable is about shot or your quadrant
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what size throttle body o - 
