diabolical1

this is sort of a double post. i tried editing the above post, but i got an error and then it simply wouldn't let me attempt it afterwards.



unfortunately, i'm stuck doing the latter. i decided to make mine by using two different diameters, allowing the sleeve to rest on the inner surface of the rotor housing. i had two main reasons for doing it that way: first, i'd never worked with an epoxy before i was honestly afraid of the sleeve working itself loose and finding it's way into the chamber. secondly, i didn't feel that my methods were accurate enough to yield identical timing on both rotor housings - even with the template i made. as it turned out, fear #1 doesn't seem to be an issue. fear #2, however, was spot on. because of that, the front sleeve does not sit as flat as the rear (though i modified it so that it's much closer to being the same angle as the rear). however, i was able to get the ports themselves cut within 2º of each other. so considering what i had to work with, i don't feel so bad at my results thus far.



with that said, by the time i am able to build my next one, i hope to find someone to machine them, and i will opt to send the sleeve all the way through to the port face, then machine it true.





just as an aside, i finally think i finished up the rear rotor housing last night. whenever i get the front done, i'll work on the port faces themselves. will update as i progress with this thing.



1

diabolical1

well, the project is stalled right now because i decided to revise the primary ports and ended up punching through to the water jacket. i was pissed for a while, but this will mean i can get a T or REW intermediate housing to use with this motor now. at any rate the peripherals are done now, just need to put a finish on the face and check the timing.



will update in time ....

sen2two

i have been wanting to try out a semi-pp without using a sleeve.



yes, i said NO sleeve. basically just fill the entire area with aluminum devcon (or your choice puddy), then bore through. i dont see why this would be a problem what so ever. many people (including myself) have used puddy to shape ports on the plates already. especially when removing the 6 port sleeves and making that transition better.



anyone think this would be a bad idea? it takes all the hard work of fitting the tubing in perfectly. making PP housings would be as easy as filling them and letting the puddy cure fully. then having any machinest bore 2 identical holes. this would let just about anyone make PP or semi-pp port rotor housing for around $100 bucks!

archerw

Am enjoying your experiment and am considering similar. Curious about your side/exhaust port details, what diameter pport (1 1/4" and a 3/16" wall alum sleeve ?), and am assuming a J-tech manifold?



Thanks,

Todd

diabolical1

I'll have to measure the final diameter of the peripherals now. I've finished them. So let me get back to you. As far as manifolds are concerned, I was hell-bent on going with a custom setup, but I'm thinking really hard about going with the RxParts intake system. So ...

Trots*88TII-AE*

Awesome stuff man. I'd love some details on the port timing you ended up with for the peripherals!

diabolical1

well, unfortunately i got caught up in the employment issues that have plagued the nation, as in, i'm not employed right now. i haven't worked (my profession) since last year. at any rate, i've recently decided to go ahead and continue as best i can, with what i can. so i should be ordering my apex seals any day now and then i'll be going back to work on finishing the housings. my goal is to have the engine together by April. i guess we'll see.



i will post the specs of the ports whenever i finish them.

Trots*88TII-AE*

Great, I`d love any details you`re willing to provide. What kind of porting you are going with on the side ports, I.D. on the peripheral and open/close timing.