Half bridge port on stock ecu.

need RX7 · 06-03-2010, 07:50 PM

Quote:

Originally Posted by N.RotaryTech

Secondaries after.

Cat litter?

N.RotaryTech · 06-03-2010, 08:32 PM

ha ha, I knew reted would chime in here sometime. Good points.

Yeah this engine could have alot done to it beside a redo of the internals.
The main port work was done by me like two years ago, they were more experimental than anything.
The sad truth about this car of mine is that I don't think it will ever have a main goal. It will just be the lab rat of anything I happen to actually do to it.
I mean I have a turbo kit that Ive been thinking about installing. But Ive always wanted to do an NA build. So its up in the air.

I think the main point is this was just a trial bridge port build, and I'm 50% happy with it.

I'm gona try to get a video up sometime.

sen2two · 06-03-2010, 08:43 PM

Now im going to say this with caution...

A nice and super cheap way to solve the problem with the stock intake manifold choking the BP and still use the stock ECU can be achieved (i still insist at least using an SAFC). And you will need some fab skills. Or know someone willing to help.

Get an FD TPS, Mate it to just about any TB that you like. Or just use the FD TB also. But i'm refering more to a set of motorcycle ITB's. Make your intake manifold, and an intake (or plenum if using ITB's) with the MAF in front of the TB (or ITB's). done...

When done right, works real nice for about $150...

N.RotaryTech · 06-19-2010, 01:25 PM

Check em out.

The day I got it running.
http://www.youtube.com/watch?v=HDzwx2wR1MI

A random day of idling.
http://www.youtube.com/watch?v=Hw8vgDCjfSQ

project86 · 06-19-2010, 05:55 PM

lol you should said a random day of revving

N.RotaryTech · 10-16-2010, 06:35 PM

So Ive been taking it for a drive on the weekends, not in a row though.
But when I do, I Love it!

I now understand why those people that have the "I (heart) my bridgeport" stickers on their rotary car.

Among other reasons i love it...
Just a couple minutes ago I found out that I can make it shoot flames on command. I put a portable mirror behind the car an looked at the pipes while I revved it up.

Something about it. When you see fire coming out of your engine you just can't Not love it.

N.RotaryTech · 10-26-2010, 10:27 AM

Well I knew this day would come.
With only 1,200miles on the motor...
Two main problems that Ive had with this engine, are...
#1 The alternator belts are being eaten away, somehow there miss aligned?
They actually broke on me a few days ago.
Its an S5 alternator on an S4 water pump housing. And there is a large space between the housing and the alternator ear in the rear part of it. I just put a grinded down nut in there to make up the space.
I wonder if that's how all S4 alternator brackets are, being shorter than the alternator.
With my S5 I didn't have this problem.

My solution will come when I rebuild the motor again.
I'm going to swap the front cover, and the water pump housing.
Because I found out that the S4 front cover doesn't go with the S5 water pump housing. So after I built the motor I used the S4 water pump housing.

Which leads me to the second problem...
#2. When I built this motor I didn't spend any money at all. Just reused everything.
Big mistake with coolant seals. Even though they only had 8 miles on them.
The car smokes every time I get it started. And I have had trouble getting it running once it starts.

I think with this rebuild I was more concentrated on the idea of the bridge port than the longevity of the motor.

This next rebuild, I'll do everything better.
It still will be bridge ported.

06-03-2010, 08:43 PM	#18
sen2two KTEC Join Date: Jan 2009 iTrader: (2) Posts: 642 Rep Power: 0	Now im going to say this with caution... A nice and super cheap way to solve the problem with the stock intake manifold choking the BP and still use the stock ECU can be achieved (i still insist at least using an SAFC). And you will need some fab skills. Or know someone willing to help. Get an FD TPS, Mate it to just about any TB that you like. Or just use the FD TB also. But i'm refering more to a set of motorcycle ITB's. Make your intake manifold, and an intake (or plenum if using ITB's) with the MAF in front of the TB (or ITB's). done... When done right, works real nice for about $150... __________________ what I have: 1985 Gs:12a All motor Drag car - 1973 Rx2: Play car What I had: 93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2

06-19-2010, 01:25 PM	#19
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC iTrader: (0) Posts: 552 Rep Power: 17	Videos! Check em out. The day I got it running. http://www.youtube.com/watch?v=HDzwx2wR1MI A random day of idling. http://www.youtube.com/watch?v=Hw8vgDCjfSQ __________________ '89 RX7 GTU, half-Bridge-port S4/S5 NA, E6K, Full RB exhaust, weekend warrior. '83 RX7, The "this might take awhile" project. '87 RX7 GXL, Rest In Pieces. '98 Subaru Impreza Outback-sport, rx7 rescue vehicle, down for repair. '94 Ford Ranger, daily.

10-16-2010, 06:35 PM	#21
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC iTrader: (0) Posts: 552 Rep Power: 17	So Ive been taking it for a drive on the weekends, not in a row though. But when I do, I Love it! I now understand why those people that have the "I (heart) my bridgeport" stickers on their rotary car. Among other reasons i love it... Just a couple minutes ago I found out that I can make it shoot flames on command. I put a portable mirror behind the car an looked at the pipes while I revved it up. Something about it. When you see fire coming out of your engine you just can't Not love it. __________________ '89 RX7 GTU, half-Bridge-port S4/S5 NA, E6K, Full RB exhaust, weekend warrior. '83 RX7, The "this might take awhile" project. '87 RX7 GXL, Rest In Pieces. '98 Subaru Impreza Outback-sport, rx7 rescue vehicle, down for repair. '94 Ford Ranger, daily.

06-03-2010, 08:32 PM	#17
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC iTrader: (0) Posts: 552 Rep Power: 17	ha ha, I knew reted would chime in here sometime. Good points. Yeah this engine could have alot done to it beside a redo of the internals. The main port work was done by me like two years ago, they were more experimental than anything. The sad truth about this car of mine is that I don't think it will ever have a main goal. It will just be the lab rat of anything I happen to actually do to it. I mean I have a turbo kit that Ive been thinking about installing. But Ive always wanted to do an NA build. So its up in the air. I think the main point is this was just a trial bridge port build, and I'm 50% happy with it. I'm gona try to get a video up sometime.

06-19-2010, 05:55 PM	#20
project86 Can't.Make.Up.My.Mind. Join Date: May 2009 Location: Murfreesboro, TN iTrader: (3) Posts: 1,377 Rep Power: 17	lol you should said a random day of revving

10-26-2010, 10:27 AM	#22
N.RotaryTech Home-brew Rotary Join Date: Feb 2008 Location: GooseCreek SC iTrader: (0) Posts: 552 Rep Power: 17	Well I knew this day would come. With only 1,200miles on the motor... Two main problems that Ive had with this engine, are... #1 The alternator belts are being eaten away, somehow there miss aligned? They actually broke on me a few days ago. Its an S5 alternator on an S4 water pump housing. And there is a large space between the housing and the alternator ear in the rear part of it. I just put a grinded down nut in there to make up the space. I wonder if that's how all S4 alternator brackets are, being shorter than the alternator. With my S5 I didn't have this problem. My solution will come when I rebuild the motor again. I'm going to swap the front cover, and the water pump housing. Because I found out that the S4 front cover doesn't go with the S5 water pump housing. So after I built the motor I used the S4 water pump housing. Which leads me to the second problem... #2. When I built this motor I didn't spend any money at all. Just reused everything. Big mistake with coolant seals. Even though they only had 8 miles on them. The car smokes every time I get it started. And I have had trouble getting it running once it starts. I think with this rebuild I was more concentrated on the idea of the bridge port than the longevity of the motor. This next rebuild, I'll do everything better. It still will be bridge ported.