1991 RX-7 - N/A Six Port Full Bridge Engine Walkaround

[thash1127]

so all 91's are 6 ports? and by six ports, thats three exhaust and three intakes i presume?

[igropemotoko]

All non turbos of the S4 and S5 series were six port engines. Turbos are four port engines. Four intake ports on the plates, two peripheral exhausts on the rotor housings. Basically just additional intake ports that are gated shut at low RPMs for torque then open in the higher revs for top end power.

[thash1127]

@igropemotoko oh, that's interesting, thanks for the reply. so the term "6 port" is describing the number of intakes not total of both

[bosgreene36m3]

that is THE motor that is currently in my car. (the white 91 with the 10th anniversary tail lights in it) bought it from the guy you sold it to. put a haltech standalone in it, did a few more small things, soon to put a ported intake mani and dual throttle bodies in it. thats so cool you made this video.

[igropemotoko]

Awesome! How's it holding up?

[bosgreene36m3]

@igropemotoko great man. runs strong, pulls hard, sounds good. I will have to make a video for you when i can find my camera. only issue ive had with the car wasnt even the motor, the hood latch was broken and the hood flew up and bent in half, cracked my windshield and broke the sunroof. this happened on the way home from getting her tuned. hahah scared the shit out of my girl. six sigma did a great job tuning it. put down 205 hp roughly... so you did get some power from the port job.

[JuanPapaNicolao]

Very nice

[EFINIRX7]

Really nice.

Did you use any porting templates?

You should get a IDA manifold and ITB's

[igropemotoko]

@EFINIRX7 No templates. Just some educated guesswork really. There's not much porting you can do on the six port engines so we played it safe but it most def brap braps. I didn't really care at the time if it made any real worthwhile power or not. So much of what I was getting done was free in the engine dept. I just wanted the bastard to run. Haha.

[heith85]

get rid of your factory intake manifold and throttle body. get something shorter rise your power band and work will with your porting

[JuanPapaNicolao]

B E A U T I F U L

[geraldo787b]

wow! really cool setup! thats my soon to be goal! to rebuild my s5 in my back yard man! videos like these give me inspiration bro! my setup right now basically looks like that but its an s4 and no paint. well ttyl

[igropemotoko]

I've been lazy with it. lol The motor is in the car and I've done the initial start up but I have so much wiring to do with the gauges and crap that it's been sitting there for a while. I just got an AE86 Toyota so that's been eating up a little but if my time and money right now. Weeeee.

[worm8888]

cooool!!!!

[pwrbytrd]

Beautiful.

[igropemotoko]

Call it a fool's splurge. I know I can get a ton more power out of a four port or by having re-done a turbo motor and swapped into it. But I wanted to keep it true to the way the car was born. There's around $2,700 in the engine. I did about 35% of it myself. The "bottom end" was built by a friend, Phillip Evans with help from another friend, Alan Davis. I got to watch Phil port and build the motor in person. Very cool. =] It's not completely finished. I will post more soon!

[fc3chris]

how much did it cost? did you do it yourself?