Camshaft oil pressure restrictors

[lbailey75@tampa]

What is the orifice size difference between the standard and upgraded restrictor for the camshaft housings ?

[Flat6pac]

I open the small hole to 5/32 for more flow but still holding pressure in the crankshaft.
First pic is old and new
Second picture is 5/32 bit in the old style compared to new
Bruce

[chrismorse]

Hi Bruce,
I am beginning a high performance rebuild assembly. Do you think it appropriate to wait untill after break in to move to a more restricted - restrictor, given the critical nature of cam break in???

Thanks,
chris

[dannobee]

Stock is 6mm, updated is 2.5mm. Many people split the difference and go with 4.5mm

[chrismorse]

Hi Bruce,
i know you have been there done this before, and am curious about "best practices" for break in.
After the initial "20" minute break in, with Driven 20-50, dump oil and filter, does it make sense to run the next 2000 miles with more Driven 20-50 brake in oil???
Given the importance of oil filtration to get rid of the break in debris, can you reccomend a better filter than the Baldwin 292???

thanks,
chris

[tops911]

for what it's worth; I split the difference with a 4.5mm. When I bought my car it had the "updated" restrictors. After much research I decided to enlarge to 4.5mm