yodaddy

.02, i just rebuilt my motor with the master kit from rotary aviation and have had absolutley no problems at all with hot or cold startup. i have approx. 1000 miles on the engine. thanks guys, for providing a great peoduct at a great price.

Elevation7

I haven't read the whole thread, nor do I know about RA seals. But generally speaking in Aviation, typical certified and approved Aviation piston engine have much larger clearances between with rings and the cylinders, due to a difference in atmospheric conditions.

Could this be a possible cause with you problem if the theory holds true for the RA seals?

Maxthe7man

Only new info is that RA replaced both my used and unused sets of apex seals free of charge, and the new seals are much better in dimension and consistency than the originals, the new seals are stamped numbered and the finish is smooth alot like the mazda 2 peice..
Usually once bitten , twice shy, but I am gonna run these in a combination that I hope to achieve 600+ rwhp out of, so I am gonna probably push them to the limits...Max

t-von

iTrader: (8)

Great now we can see there potential. Any idea when you car will be finished?

Mr. Gadget

I still would like to know if I need to pull a few motors before they blow. Any ideas on the specifics of the bad lots as I asked earlier?

88IntegraLS

I've got 7k miles on a ~160rwhp streetport S4 NA with the RA seals and it's stronger than ever. I'll get to test the seals with 5-8 psi on this block in a few months, yay.

Mr. Gadget

I have three running from 5K to 10K all Na's. All were engraved matching numbers. Just want to know If I should start pulling now, cant afford three sets of rotors.

rzograbian

it shouldnt be too much of a problem in NA motors but in turbo ones, it created excessive heat so the seals would warp quicker.... i dont know for sure though, i dont rebuild engines! my .2 cents

Mr. Gadget

I am really looking for tracy to clear up my questin, the ahve taken the apex seal issue down from there web site - need to know as I have engines out there. Not the end of the world, just want to take care of this now while its zoom zoom instead of after "boom boom"

kabooski

a mistuned car will break apex seals
these bend

I rather have bend over break and damage my parts

I did however not use the RA long apex seal spring
as I can clearly see that they are not flame hardened there chrome like.
stock and "others" have a darker hue to the springs
so I used the long stock OEM spring and the RA small spring

well see how she handles after I break in the engine

t-von

iTrader: (8)

Exacty! This is the # one reason I'll be using these RA seals.

Thats some interesting info about the long apex seal spings. I wonder if Tracy could shed some light about this?

93BlackFD

i've got 3-4k on my half bridge port, 13psi all the time

no problems yet...starts good

i have been getting the oil analyzed and i am seeing a high chromium count, perhaps they are still breaking into the rotor housings or maybe they will continually wear on them

kabooski

add a little vp racing 2 cycle with your gas

now

iTrader: (1)

I cant see apex seal material getting into the oil at all. i would bet
that the chromium that is showing up is from the oil control rings.

matt

93BlackFD

chromium = rotor housing surface

t-von

iTrader: (8)

I'm with now! How would the chromium material from the rotor housing get back into the oil system?

93BlackFD

good question, i hadn't figured that one up yet

Mr. Gadget

That realy is a good question. If chromium is getting from the combustion chamber to the oil, you would also have high dulition of gasoline in your oil leading to premature bearing wear. What other parts are chromium coated?

Herblenny

iTrader: (13)

Very interesting..

93blackfd, where are you sending your oil to be analyzed?? and how much does it cost??

I'm thinking about sending some samples when my engine gets done..

PHIL

93BlackFD

http://www.blackstone-labs.com/

$20/pop, i highly recommend getting their free sample collection kit, comes with everything you need and gives you those window stickers that remind you when your next change is

Herblenny

iTrader: (13)

Thanks!! Very cool.. I just asked for the free kit.. I'm going to tell our club members about this..

rxseven

Hardened steel has a higher chromium content. The e-shaft material could be one which could explain the oil contamination. Just throwin' it out there, not sure.

IRPerformance

iTrader: (41)

I have a set of 3mm for sale. Brand new.

93BlackFD

i detonated twice on these seals, the whole story/writeup is going to be in the august issue of rxtuner...

7racer

you detonated twice?

Did you have your water injection working?