Ok, I am just starting to Mod my 01 RAM 5.2 and alot of people are subjecting me getting a Fastman TB, I went to his site and notice he has few types of TB, the 50mm and the 52mm and one more with 53 with a 2.030 bore, Which he says is good for low and high in performance. Has anymore put other then a 50mm on there 01 5.2(318)? If so are there any gains or fall back to it, I am mainly just wanted to inprove on low end Toqu but if I could get both that would be great to.

Thanks,

DMan

 

You want the 50mm tb on a 5.2. Unless you have some serious mods it will be plenty. Going to a 52mm or larger will cost torque at low rpms.

 

OH Ok, thanks that is what I was looking for.

 

I've got a 50mm on mine and love the performance.

 

So 50 is the bore size? And what is the bore size on a stock 5.2

 

Stock the tb is an hourglass shape. At the top its 50mm but tappers down to 48mm