main restrictors

Do any of you engine builders use main restrictors when running stroker motors,running 4.5 stroke with 6.8 rod-street 545. I've had some people tell me the reason i can't get oil pressure is because of no restrictors and the machine shop that did my motor didn't put any in. Running solid roller cam,made 5 good passes fri at ethridge running about 45-50 lbs of pressure, number 6 pass lost oil pressure. Help Thanks dave

The restrictors from the main to the cam bearings? If so, I do not use them.

Thanks ,also the pushrods that I'm running have 90thousand oil hole ---is this to much seems to be getting alot of oil up on top when priming

are your lifters in with the bars down?

oil holes are away from oil galley, check that one all ready,Thanks,,sorry i didn't get to meet you over the weekend next time

dave d wrote:oil holes are away from oil galley, check that one all ready,Thanks,,sorry i didn't get to meet you over the weekend next time

i walked up where you were parked but did'nt see you but i did see you go down the track.

dave d wrote:oil holes are away from oil galley, check that one all ready,Thanks,,sorry i didn't get to meet you over the weekend next time

What lifters are you running...?

I never restrict oil to the cam bearings, (unless it's a roller cam bearing where the cage blocks the hole itself). For that long stroke, I do machine the slot in the main bearing to a 9/32" hole aligning with the block oil feed hole to that main.
Some people only "hole" the center three mains and some claim even THAT is totally unnecessary.

dave d wrote:Do any of you engine builders use main restrictors when running stroker motors,running 4.5 stroke with 6.8 rod-street 545. I've had some people tell me the reason i can't get oil pressure is because of no restrictors and the machine shop that did my motor didn't put any in. Running solid roller cam,made 5 good passes fri at ethridge running about 45-50 lbs of pressure, number 6 pass lost oil pressure. Help Thanks dave

YES, solid roller cam we use them, feel free to call me, but you may have more then one problem

BOSS 429 wrote:

dave d wrote:Do any of you engine builders use main restrictors when running stroker motors,running 4.5 stroke with 6.8 rod-street 545. I've had some people tell me the reason i can't get oil pressure is because of no restrictors and the machine shop that did my motor didn't put any in. Running solid roller cam,made 5 good passes fri at ethridge running about 45-50 lbs of pressure, number 6 pass lost oil pressure. Help Thanks dave

YES, solid roller cam we use them, feel free to call me, but you may have more then one problem

^^^^^ X2 ^^^^^

I've used the FRPP ones on all of my race stuff, and have never had an issue with pressure due to the restrictors themselves. Luckily, none at all...