Help me figure out what TB i have....

[95CobraMike]

How do you tell what TB you have? or for that matter, what size it is? the guy i bought this car from said it was a 75mm, but how do i know?

 

[Rootus]

The only sure way I can think of is to take it off and measure (you need to measure on the intake side).

Dave

 

[95CobraMike]

what TB SHOULD i have? with my set-up? im not sure now either on the MAF size but i know its calibrated to 42lb injectors

 

[xr8d302]

75mm should be alright for your application, IMHO

 

[95CobraMike]

thanks xr8d302

anyone else have an opinion about what size i SHOULD have in there?

 

[wytstang]

The cobra inlet opening is 70mm so unless you have it opended up I would just get a 70mm. A 75mm would probably work better but unless you open up the stock 70mm opening to 75mm I doudt you'll reap the benifits of a bigger TB. .02

 

[95CobraMike]

the upper and lower intakes have been ported...
what TB comes stock on a cobra?

 

[Rootus]

what TB comes stock on a cobra?

60mm. The stock one, as well as the aftermarket FRPP one, are easy to recognize. Got pics?

 

[wytstang]

Mike I'm referring to the opening inlet (where the TB bolts up to) sounds like your a bit cunfused.....

 

[95CobraMike]

i dont understang you some times wytstang.... you crazy beast you.... ummm i still dont understand.... heres a pic show me

 

[wytstang]

TB inlet opening (stock opening 70mm)
View attachment 508445

 

[95CobraMike]

so you're saying that 75 would be pointless? what if that part was also ported? is it possible?

 

[Rootus]

so you're saying that 75 would be pointless? what if that part was also ported? is it possible?

Yes, you can have the intake ported so to match a 75mm throttle body.

 

[95CobraMike]

ok well i will measure it and see what i have and get one accordingly....
i looked at my MAF lastnight and it was a 75mm Pro-M