www.RX7fb.com

so are the end plates as useless as the centre plate? weirdly Dwayne looked at the pictures and said nothing wrong with them and could cut a bridge port into them no problem... hmmm maybe i'm not detecting his sarcasm

Dwayne wants my plates

That White one is looking great are you gonna Port And rebuild the engine yourself ?

Good luck with the project

TOOL wrote:Dwayne wants my plates

I might want some bits, maybe plates. Dwayne still seems to think they're fine and that he can port them, but from what I've read the ports and runners are tiny and the casting doesn't have enough meat in it to open them up, as well as having blocked of coolant passageways near the ports.

Rubarotary wrote:That White one is looking great are you gonna Port And rebuild the engine yourself ?

Good luck with the project

I plan on building the engine myself, but it will be my first time so will be asking questions on here and to Dwayne I'm sure. I will probably get Dwayne to port and supply some of the parts, like the SE housings. I was considering buying a donor RX8 for the rotating mass but I then end up with a shell I don't need.

Be careful with pre 86 housings and post 86 rotors as the rotors can hit the housings.

Ditch the 12A stuff and go 13B all the way, ie post 86 aka FC onwards.

TOOL wrote:Be careful with pre 86 housings and post 86 rotors as the rotors can hit the housings.

Ditch the 12A stuff and go 13B all the way, ie post 86 aka FC onwards.

why would the rotors hit the housings?

Maybe FC would be a better option, although want to run an IDA set up, don't want 6port so would need turbo plates i'm guessing

Rx8 rotating Mass ? What do you Mean ?
Sorry i'm a newbie when it Comes to Rotary engine

Tool- why did you say the center plate would be useful to someone or would work in a 12A 6PI?

All the posts I have seen about RX8 rotors hitting housings are misinformation and the main difference is a chamfer on the edge and the side seals being in a different location, meaning bridge ports would have to open very early.

Are my end plates different to a "normal" S2 or S3 12A?

Rubarotary- a rotating mass just refers to the moving internals of a rotary engine, the rotors, E shaft and counterweights. I have been planning on using RX8 because they're more readily available here, the E shaft is the best/lightest 13B shaft and the rotors are ligher and higher compression, although I'm not sure if I would be best going back to the dwg board and using an '86+ 13B and forget the IDA and use the stock intake and run EFI or build a 4 port 13B with N/A rotors.

I might have some S3 tall port centre irons in the garage if you decide you need one James

gt_james wrote:Tool- why did you say the center plate would be useful to someone or would work in a 12A 6PI?

All the posts I have seen about RX8 rotors hitting housings are misinformation and the main difference is a chamfer on the edge and the side seals being in a different location, meaning bridge ports would have to open very early.

Are my end plates different to a "normal" S2 or S3 12A?

Rubarotary- a rotating mass just refers to the moving internals of a rotary engine, the rotors, E shaft and counterweights. I have been planning on using RX8 because they're more readily available here, the E shaft is the best/lightest 13B shaft and the rotors are ligher and higher compression, although I'm not sure if I would be best going back to the dwg board and using an '86+ 13B and forget the IDA and use the stock intake and run EFI or build a 4 port 13B with N/A rotors.

12A 6 port uses dinky primary ports iirc. So does 12AT but that's not a 12AT plate.

I never said anything about RX8 rotors. I was talking RX7.
I wouldn't use RX8 stuff. Apex seals are too shallow. Rotors need machined. Side seals are in a different position and won't work with a regular bridgeport.
RX8 shaft is longer and needs mods to work.

Your end plates are effectively the same.

Just keep it FC and you'll be fine.