siks3

Hi guys
Ive been reading all the posts on RA super seals.
Has any one got any new info on longlivity of the engine and housing condition after using these?
I'm mainly interested in these as they seem to take a bit of abuse and ceramics maybe a possibility but i would rather spend the money upgrading my running gear.
Also stockers are a no go as ill probably detonate it as this is my first turbo rotary build.

I am building a 13brew cosmo engine which is bridge ported with lightened rotors, balanced rotating assembly, rx8 stationary gears and race clearance rotors plus eshaft oil mods and a guru stud kit with a 5mm steal plate between the sump and engine to help it from twisting at high rpm.
Bolted up to this will be holset HX55 turbo with the following specs .92 front, 1.32 rear, wheel back cut 2deg.

Now the questions.....

How will this turbo perform?
How much power can i make using the standard intake?
what injector size should i run?
Ive run and built a few NA BP and PP in my day but have been out of the rotary seen for a fair few years.
so any help would be appreciated to get me back in to the know.

diabolical1

iTrader: (3)

sounds like you've got a pretty awesome setup going. well, if you're trying to decide between RA Super Seals and ceramics, i must say that i don't think there's any decision to be made. i'd choose ceramics. yes, they are very expensive, but in my opinion it's six of one, half dozen of the other ... because housings aren't exactly cheap either. i plan to run ceramics in 2 of my upcoming engine projects, but as of now i've never used them. i HAVE used RA seals in past engines though and since i haven't disassembled any of them, all i can say is they're still making good compression. i don't have anything bad to say about them, but nevertheless i want to try ceramics ...

i'm not familiar with the Holset turbos (other than knowing they are related to Cummins and diesel applications) so i can't speak on what to expect. plus those sound like housing sizes anyway and other knowing they are capable of flowing huge amounts of air, i can't tell much else without wheel sizes added to your info. sorry, i'm not as knowledgable as some others.

what i will say is your injector question is tricky because it would be easy to say go large, but you didn't mention what type of fuel you plan to run and/or if you're going to run some sort of auxillary injection.

i'm pretty sure i've read of stock intakes eclipsing 600 HP. what you may want to be aware of is the uneven distribution between rotors 1 and 2.

hope at least some this helps you out.

diabolical1

iTrader: (3)

actually, i just re-read my response and i want to clarify and possibly correct something i said. when i made the comment about the uneven distribution with the manifold, i was referring to the REWs we got here in the Rx-7, not the REWs you got in the Cosmo. generally, most people over here refer to them as REs, which may or may not be technically correct, but either way i made the comment based on the Rx-7 engine, not the Cosmo. i've never worked with a Cosmo engine and so my research and knowledge is limited. i honestly don't know how their manifold distribution is setup. you may want to check with more experienced members (BDC or Crispeed) if searching doesn't give you an answer.

sorry for the possible misinformation.

siks3

Yea Ive herd that RA seals hold there compression but when the engine is torn down that's when the housing damage rears its head I'm curious to know if this problem is still happening.
I'm all so curious to know if the housings are rooted after a respectable amount of miles and if this is comparable to factory seals.

With my fuel set up i got hold of a spacer type thing that goes in between the lower and upper intake manifold and this holds 4 injectors.
I was just going to fit block off plates to the original injector holes.
and run two primaries and two secondary injectors in my custom spacer
and keep the original injector holes available by using block off plates just in case latter on i need to add a couple more injectors if i have trouble with not enough fuel.
I will be running pump fuel by the way.
all so i'm doing some research into a water methanol injection and this might be a good investment all so.

How and where is the water methanol mix injected into the engine?

siks3

Here is a pic off my fuel set up mine is only a 4 injector rail.
this is an 8 injector rail

[IMG][/IMG]

siks3

and another pic (not my intake)

[IMG][/IMG]

diabolical1

iTrader: (3)

looks very cool. i haven't seen that particular setup before. if i were you, i'd do this ...

find out for sure how the flow distribution on the Cosmo manifold is, if it checks out then go ahead do what you planned with the spacer and extra injectors. you can always start with 850 primaries and gradually move up accordingly, but it sounds like you'll need to start with 1680 secondaries. it's a popular combo here. as for details of the auxiliary water or methanol injection, i'll defer comment to those that actually use it. try BDC, Crispeed, ErnieT or Aaron Cake ... i have shared correspondence with Crispeed and Aaron and i can say that they are very down to earth - just busy. i haven't tried contacting BDC or ErnieT, but they seem like good people as well (based on their posts). get their opinions/advice on what to run for auxiliary injection.

as for my RA Seals, i don't plan to tear my engines down until they start ******* up ... unless i can stabilize my finances right now and get a shop. at the current time, i can only handle but so much R&D and right now my focus is on EMS installation and tuning. wish i could help you more with that, but like i said, the engines still make good compression and i'm very happy with the RA Seals.

however, all of my research shows that there's simply no comparison in terms rotor housing life between RA Seals and ceramics. PM Glassman - he's cool and down to earth and at this point, he's who i plan to buy my ceramics from when the time comes.

one thing i failed to mention is if money is an issue and if ceramics are way out of your reach, you might want to open your choices up. there are some very good seals out there. there are a couple of threads on the board that yield some pretty good info. by the way, i'm not trying to sway you to one person/vendor or another, i'm just sharing what my research has yielded thus far.

good luck.

siks3

Thanks for your help i was just wondering how the NRS ceramic seals bed in on used housings the ones i have are good they have only done 50.000km but i was going to get fresh ones.
But now contemplating using that money on the ceramic seals.
I have already got a contact for those seals here in Australia through rice racing.
I was thinking of 1 piece 3mm seals.
The NRS seals seem like a good investment as they can be reused through multiple rebuilds.
Do you have any thoughts using ceramics on used housings?

siks3

any body heard of these ceramic seals?

http://cgi.ebay.com/ebaymotors/_Car-...4506.m20.l1116