So I will be porting my 4s n/a 13b, all the way to a bridge port, now will I absolute have to get new apex seals/springs/ all that crap, or can I run my old stuff if its in good enough condition?

 

if you're planning on doing a full bridge without going to carbons (i'm not aware of any other type of 1-piece seals), then have your builder make it thick enough to support the corner piece.

you can check out the users Toguemonster, Jeff20B and Peejay. they all run (or have at least built) bridges that are well-documented.

 

So im guessing going to a once peice would be much better?

 

before i participate any further, please keep in mind that with bridgeports, i have some opinions and observations, but no "real" experiences to share.

that said ...

the one piece simply has no corner piece to worry about. you can make a two piece seal work just fine though.

the carbon vs. metal issue will basically reduce itself to what your primary use and the ultimate goals of your build are. are you building mainly to BRAP or are you building to race?

 

OEM 3 piece seals on a bridge? no.

with a true auxiliary bridge you have to orient the long seal (2 piece seals)against the bridge, with a true bridge on primary and auxiliaries you need a single piece seal. a true bridge cuts into the rotor housings and the assist boot of the seal will dig into it.

you cannot use the original 3 piece seals with any bridge port except maybe a wannabe b-port hackjob which won't do much of anything.

 

Okay, well I think I'm going to so a big street port. Ill be honest I did want the brap brap brap, but I'll just do a minor performance increase with the street port

 

IMO, you still replace ALL the hard seal springs, even if the seals are within spec.

 

anybody tried to run a bridge primary and mild seconarys?

 

Not sure but next year I'll be doing street with bridge aux. should be beastly

 

welcome to the board.

to what end???

i've seen a few guys talk about/plan doing it, but i don't remember seeing anyone actually execute and try it. and again, the question would be: to what end? unless there is some reason that you would be forced to switch idle from the primary ports o the secondaries, why would you want to bridge ONLY the primaries? if you're going to bridge the primaries, why not just do the whole engine and be done with it?

 

obviously, it's your car and ulitmately your decision, but if you haven't already done so, i would strongly suggest looking up some old posts by Rotarygod on this subject and then rethink your plan.