chiquito1228

here are some pictures of my porting on my 12a. and the whole engine put together. let me know what you guys think.

RX7 allnight

looks good did you port youre primarys as well? i just finished with my intakes today tomorrow i port the exh.

Latin270

Man that looks good but scary! Its the side seals that would concern me with that port.

Sgt.Stinkfist

iTrader: (6)

^ thats what i was thinking

RX3SP

iTrader: (62)

I agree with you Latin. It's hard to say from the picture but in picture 4 it appears that the port opens so early that there could possibly be an issue with the side seals not having any support. On the other hand, pictures can sometimes be deceiving.

trochoid

iTrader: (6)

Good luck, save more cash up.

chiquito1228

half of the seal is hanging on the air when it goes thru that opening. that would be enough support for the seal.

84stock

iTrader: (5)

did you at least use a template????

Jeff20B

iTrader: (13)

I wish your side seals a long, productive life.

mar3

iTrader: (8)

"Half hanging in the air" been drawn into the engine at 8500 rpm isn't going to be pretty.

chiquito1228

am not taking my engine all the way to 8500 rpm

RX3SP

iTrader: (62)

I've experimented with lots of different porting configurations over the years. Some have worked well and some have bordered on disastrous. You never know for sure until you button it up and try it out. I'm wishing you luck!

chiquito1228

thats what i told my self too. never know what will happen until you do it. thanks foe wishing me luck

Midwest 7's

iTrader: (4)

what if you miss a shift?
we all have done it.

13BT_RX3

I have heard that champhering the housing for a smooth landing of the side seal can work for that type of port. What I mean is if the port were shaped so the side seal first landed towards it's supported bit then had gradual increase in support until the finally the tip landed. This would lessen the potential for a violent collision.

chiquito1228

a rev limiter will help with that

mar3

iTrader: (8)

So what rev limiter are you you going to run on that engine; Mallory, MSD, ACCEL, Jacobs......

chiquito1228

i was thinking of running that msd 6al

dbragg

iTrader: (7)

if im not mistaken, to use a rev limiter you have to have a msd6al hooked to the trailing and leading. the reason being that if you have it only hooked to the leading then when it starts trying to limit your revs your trailing is still firing. this will in turn lead to detonation and an apex seal bouncing around your exhaust pipe.

i have an msd 6al, ill straight up trade anyone for a 6a. that is unless you can use a 6al without using the limiter.

The_Dude

Nice job !!! Good luck with them ! ... Hope they have enough room to clear !!

chiquito1228

would it be possible to run 2 msd boxes

chiquito1228

thanks

dbragg

iTrader: (7)

yes, use two 6al and itll limit both the trailing and leading.

openshot

looks really cool i need to ask how much HP does it give?

chiquito1228

to be honest i have no idea probably somebody in the forums my have an idea. but u are not the only 1 i ask my self too.