Well, just trying to get more info on this mod since it is easy/cheap when the eshaft in your hand.

Backround....
http://fc3spro.com/TECH/MODS/ENGINE/...AFT/oiljet.htm

Part....
https://secure.cbperformance.com/shopcart.asp?add=3310

BDC says it is not needed unless you are pushing 400rwhp...

I am gonna go with him on this one

Not much info in the searchs so I figure this post could not hurt...

James

 

Personally, these oil mods are more for high spinning engines or stuff pushing over 500hp at the wheels.
I've seen internals of 400hp motors, and the bearings are still fine - which implies that the stock jets are adequate for those power levels.


-Ted

 

The jets dont do any oiling of the bearings, so looking at the bearings wouldn't tell you anything about the job the jets are doing...
If you increase the oil pressure, you can leave the stock ball and spring in place, and get enough flow for even very high Hp output, the jet mod is really to stop the ball and spring from redcuing oil flow under high cornering and braking loads, it gives more consistent rotor cooling overall, but on the street the ball and spring works fine..Max

 

Oops, this is what I get for replying to **** at 3am in the morning.

Yep, you're right.
Most experiences have been that oil pressure is decreased, so oil (pressure) is also bypassing the bearings.
Ultra high OPR's (100psi+ like FD) should make this matter moot though.
Sorry for the memory barf...


-Ted

 

Mazda Performance (Mazdaspeed) also sells oil jets just for this purpose and they are quite inexpensive.

I haven't seen them yet, though I plan to purchase them. Perhaps they even thread in instead of press in?

 

Yes, they thread in. They even cost less than a new weber jet. Idle oil pressure suffers, but you put more oil to the rotors at high speeds to keep them cooler, plus you eliminate any possibility of a ball and spring failure.

 

Thanks for the great info nimrodTT!

I had gathered that the decrease in low rpm oil pressure was the reason these are typically NOT recommended for street use.

I think lowering my low rpm oil pressure will help out in streetablility in my case. It was typically 35-40psi at idle (700rpm) shooting to over 60psi before 2,000rpm. Had a hard time not pushing oil out the exhaust side of my turbo at low rpm; I had to put oil pan under vacuum to create a drain friendly pressure differential.

 

Use 180 air corrector jets. I've got a full write-up on this mod posted on NoPistons.com... also somewhere on one of my FTP sites ...

B

 

Expect around 20psi or less at idle with the jets in the shaft.

 

Bingo!

B