Hi,
I've just torn down an old PP race engine, please see photos and comment if you've seen this mod before...
Thanks,
Seann

 

Looks like someone used old Bridgeport housings to make the p-port housings.

 

I can't imagine that's great for apex seal support across that area.

 

Kind of looks like a half assed j port

 

I think its safe to say that one lost a coolant seal when the channel gave way...

 

I agree that these were likely old bridgeport housings, just can't see the benefit of taking quite so much out of the rotor housing. On the one cleaned up you can see that the channel was MACHINED away...removing the inner wall of the seal groove. Although the void was packed with silicone, seal failure was pretty much guaranteed. These housings are good otherwise and I'd like to use them, just have to come up with a way to build up and re-machine the groove. Thanks for the comments...any thoughts on repair?
Seann

 

JB weld in the area where the pport is and where the oring sits take a punch of a very small screw driver and make a "wall" before it enters the port inside where the seal sits. Cut the oring at an angle so it will but up against said "wall" so it cannot get sucked into the port area. I've done this with motors and have stayed sealed for a number of years but they will eventually leak. Make sure to put a good silicon like Hondabond or similar in the area you put JB weld in, hope that helps. You can also use an old apex seal spring and place in the groove to make a wall and then you wouldn't have to cut the seal but it depends on how far back they cut the relief.

 

full bridge +PP, mostly seen with semi pp. uses one pc apex seals. just find a way to seal the coolant and good to go.

 

all the porting

 

Idk how that makes sense. If you go to the trouble of PP, adding bridge like that doesn't make sense. Just make the PP and street port slightly bigger if you truly run out of flow.

 

All your porting are belong to us

 

I don't get it either...I've got a semi peripheral port housings and irons with a large street port and can't imagine that it would need more flow to justify taking on a bridgeport and all the potential failures you have with it that you wouldn't with street port irons.