Throttle Body Experts

mrpink · 01-08-2004, 09:20 AM

Gentlemen, I could use your help. I built a Cobra kit car. The engine I used came from an 89GT. The engine looked new, I bet it wasn't in the car 6 months before it got hit. It has Cobra intake, (with the cobra 5.0 logo), cam(don't know what size), Ford/Crane roller rockers, Ford headers. I took it to the dyno and was 269 wheels which equates to about 309 crank. The dyno guy said it was running a little rich. We took the air cleaner off for a run and it was still the same. He suggested a bigger TB. He frowned on a bigger MAS, said people have problems with the computer and all. I read an artical where a guy had 400 HP with the stock MAS. I have the #19 injectors which I understand are good up to about 325HP. I'm finally getting to my question. My TB is painted and has no markings. I measured the intake with a ruler and get about 58-60 mm. Not the bevel but the throat. Is this how you determine size? I would like to get a larger TB if it is going to give a little more torque. Is it possible the previous owner put the stock TB on the cobra intake? Do I need to go to a 70mm or is a 65mm better? Sorry for the rambling but I wanted to give you guys as much info as possible. Thanks,
Jim

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01-08-2004, 09:20 AM	#1
mrpink Registered Member Join Date: Aug 2003 Posts: 17	Throttle Body Experts Gentlemen, I could use your help. I built a Cobra kit car. The engine I used came from an 89GT. The engine looked new, I bet it wasn't in the car 6 months before it got hit. It has Cobra intake, (with the cobra 5.0 logo), cam(don't know what size), Ford/Crane roller rockers, Ford headers. I took it to the dyno and was 269 wheels which equates to about 309 crank. The dyno guy said it was running a little rich. We took the air cleaner off for a run and it was still the same. He suggested a bigger TB. He frowned on a bigger MAS, said people have problems with the computer and all. I read an artical where a guy had 400 HP with the stock MAS. I have the #19 injectors which I understand are good up to about 325HP. I'm finally getting to my question. My TB is painted and has no markings. I measured the intake with a ruler and get about 58-60 mm. Not the bevel but the throat. Is this how you determine size? I would like to get a larger TB if it is going to give a little more torque. Is it possible the previous owner put the stock TB on the cobra intake? Do I need to go to a 70mm or is a 65mm better? Sorry for the rambling but I wanted to give you guys as much info as possible. Thanks, Jim