T88Rx7

what size seals are better for and fd with a street port motor running 19 psi on the track and 13 or a little below on the street?

rynberg

Hurley 2mm seals unless the rotor ends are won't seal with 2mm anymore, then 3mm.

T88Rx7

ok im sorry but i do not understand what you just wrote

HUGH

2mm refers to the thickness of the seal. Hurley is the manufacturer. 2mm is stock on the RX-7, 3mm is what lots of us upgrade too. Hope this helps because you'll find out that at 19 psi your going to learn all about replacing seals quite regularly unless PERFECTLY set up.

T88Rx7

i know what is harley and seal thickness is but the way he put it i didnt understand it. But anyways i hear that 3mm worp easy but are stronger than 2mm

Johnny

what he means is...there is NO real reason to use 3mm seals over 2mm seals..you see 13B-rew housing are designed for 2mm and have to be machined for 3mm and it is an art form to this. Often your housings my be out of spec for 2mm and thus unless you want to buy new housings...($$$)maybe not...that's where going to 3mm can save you some dough

T88Rx7

but of all outcome 2mm is better right?

Johnny

Personally.......... YES.

rynberg

Sorry for the short and confusing explanation, I was at work when I posted that and was in a hurry...

Thanks Johnny, you covered for me.

T88Rx7

so i should go 2mm. Thanx

Johnny

If you can go with 2mm I recommend the Hurley's that someone mentioned before.. now if you are not in spec for 2's and dont want to spend the money for new pieces...then save yourself some dough and get 3's....

Piston Pete

Isn't it usually more expensive to have machine work done to an engine, and cheaper to just buy new parts?

Ant

luneytune

My rotor machining cost for 3mm was $150/rotor or about $90 in US$. It is true though that you better know who is doing it and has done it many times.

T88Rx7

ill probably post pics soon as i get the car here