Originally Posted by Beau_Jester
Thanks for answers.
TT oil pump has more pressure and flow due to relief spring tension.
TT pump relief spring in NA pump will equal TT pump flow and pressure.
1st Gen TT pump will fit with 2G NA oil pan.
Here's one I found out from 3SX. 2G TT oil pump will fit 2G NA DOHC 2 bolt motor so 2G TT oil pan will also fit when it is installed.
I wonder if putting a washer under the NA relief spring would equal the TT spring pressure?
I totally spaced. Actually, the 1st gen pumps will only work with 1st gen pans, just as 2nd gen pumps will only work with 2nd gen pans.
I wouldn't say "flow" is the correct word to use. They flow the same because the gears and housings are exactly the same, but in the higher revs, the relief spring gives different "pressures."
Putting in a washer is called "shimming" the pump. My oil pump has a shimmed TT spring.