My 13B NA Build Thread
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My 13B NA Build Thread
Hi everyone,
I'm Dan, from Argentina. Down here RX-7's are very rare cars... and people who know how to work on them are even stranger to come by -- so me and a friend decided to work and rebuild my car.
This is my piece of **** FC, I love it.
I decided to go the NA route.
The car itself is a '91 FC... but not your average FC... it's a "Middle East/NZ" spec... or something weird like that.
It has a S5 body, S4 engine with S5 size/shape intake ports, Distributor, Thermal Reactor exhaust, ABS + 4pot brakes, rear seats, open diff, and a unique 6-PI actuation system.
Check the bay out
So, the plans for this first stage are the following:
So it starts...
I'm Dan, from Argentina. Down here RX-7's are very rare cars... and people who know how to work on them are even stranger to come by -- so me and a friend decided to work and rebuild my car.
This is my piece of **** FC, I love it.
I decided to go the NA route.
The car itself is a '91 FC... but not your average FC... it's a "Middle East/NZ" spec... or something weird like that.
It has a S5 body, S4 engine with S5 size/shape intake ports, Distributor, Thermal Reactor exhaust, ABS + 4pot brakes, rear seats, open diff, and a unique 6-PI actuation system.
Check the bay out
So, the plans for this first stage are the following:
- Large Streetport Intake porting (Pineapple Racing template)
- Large Streetport Exhaust porting (Pineapple Racing EP2A template)
- Send the ABS to hell
- Send the AC to hell
- OMP delete
- Emissions + Air Pump removal
- Cruise Control delete
- Pulsation Damper mod
- Complete Engine Rebuild
So it starts...
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Until I get a proper header (I plan to build a custom one), I got ahold of a US spec S4 exhaust manifold to replace the hideous and incredibly heavy Thermal Reactor.
Check them out.
Now blocking off several thingies...
... and doing some Throttle Body mods
Got the plates lapped, they look really nice!
And decided to send the exhaust inserts to hell!
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Removing even more stuff out of the car...
Several cleaned/to clean parts...
Ported housings, check the size of those exhaust ports!
A close-up of my engine's super VTEC. Instead of the rotating sleeves operated by exhaust backpressure, this LIM has these nice valves. The aux ports themselves (inside the front and rear plate) have a nice curvature as well!
The ducts for the rear rotor were full of carbon deposits... all thanks to some EGR thing.
Nice dual-sheave alternator pulley
Another pic of the S4 exhaust mani... there's some beveling work to be done there, since the exhaust ports are massive now...
Porting the TB a bit...
The "stuff we don't need anymore" corner... there's over 100kg in parts in there
Several cleaned/to clean parts...
Ported housings, check the size of those exhaust ports!
A close-up of my engine's super VTEC. Instead of the rotating sleeves operated by exhaust backpressure, this LIM has these nice valves. The aux ports themselves (inside the front and rear plate) have a nice curvature as well!
The ducts for the rear rotor were full of carbon deposits... all thanks to some EGR thing.
Nice dual-sheave alternator pulley
Another pic of the S4 exhaust mani... there's some beveling work to be done there, since the exhaust ports are massive now...
Porting the TB a bit...
The "stuff we don't need anymore" corner... there's over 100kg in parts in there
#7
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With the basic engine assembled, time to celebrate with asado and beer!
Work continues...
Now with the oil pan
Beautiful
Getting the engine in...
Sending part of the exhaust to hell
Getting more stuff in
Work continues...
Now with the oil pan
Beautiful
Getting the engine in...
Sending part of the exhaust to hell
Getting more stuff in
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#8
Lenny
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Wow that thermal reactor thing is a trip. Never seen one of those before.
Lookin good man. I may have missed it, but what are your plans for the exhaust? Just wondering why you didn't use headers, especially since the engine's ported. Noise constraints maybe?
edit: Oops I just read the part where you said the stock mani was a temporary thing. My bad!
Lookin good man. I may have missed it, but what are your plans for the exhaust? Just wondering why you didn't use headers, especially since the engine's ported. Noise constraints maybe?
edit: Oops I just read the part where you said the stock mani was a temporary thing. My bad!
Last edited by Len-Len; 03-12-11 at 09:43 AM.
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Such a cute little engine, hehe
... my friend Luis battling against the wiring
So that's as far as we've gone at the moment... we're waiting for some MSD Blaster 2 coils to arrive so we can work on the DLIDFIS setup and fire her up!
I'll obviously keep posting stuff as we continue to work!
... my friend Luis battling against the wiring
So that's as far as we've gone at the moment... we're waiting for some MSD Blaster 2 coils to arrive so we can work on the DLIDFIS setup and fire her up!
I'll obviously keep posting stuff as we continue to work!
#11
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#12
Engine, Not Motor
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Nice job so far. Gotta love the Euro style FC LIM and the thermal reactor.
One thing I would recommend is to put the BAC back on. That's now the ECU regulates the idle speed.
One thing I would recommend is to put the BAC back on. That's now the ECU regulates the idle speed.
#14
This sh*t burns oil!
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Thats a crazy l.i.m. Would be perfect for to start a 6pi turbo and still keep the 6pi working. I had a video from old top gear in early 86 showing the new FC and it was a s4 motor with a dizzy.
Just out of curiosity what is the ECU code? Maybe its my imagination but the center iron doesnt appear to be the same series as the front and rear irons.
Just out of curiosity what is the ECU code? Maybe its my imagination but the center iron doesnt appear to be the same series as the front and rear irons.
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I'll see how it runs BAC-less, and if it becomes unbearable the BAC will go in again.
ECU code is N368.
The center iron hasn't been swapped or anything weird -- it's what came with the car, stock.
The center iron hasn't been swapped or anything weird -- it's what came with the car, stock.
#20
PedoBear
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reason is that rotory's combustion are relatively long and narrow. lots of unburn(partial burned) fuel = high HC and high carbon monoxide
Thermal reactor is just a heavy duty chamber with fresh air injection so it allows the unburnt gas to "finish" burning.
I seen one of those in person recently, it weights like maybe 100 lbs or some crap. Think of it, its pure steel.
#21
so u can buy template for porting your own engine, ive watched arron cake port before but if theres a template id feel much more confident doing ti my self, also does porting the intake throttle body help much and is it very difficult? and did i read wrong since you said you were using a s5 uim? and if you are what is required to do the installation
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The brake master cylinder is out of a S5 T2, for example.
It also has a 12v AFM instead of the usual 5v.
Oh, and that unique N368 ECU no one knows anything about.
Regarding the LIM, I might get rid of it in the future... I plan on running ITB's.