Banzai Racing 20B GT42RS 93 FD
08-27-09, 03:48 PM
#1
Banzai Racing 20B GT42RS 93 FD
This is one of our shop cars that we work on when we get a chance. A year ago I decided that is was time for a 20B. The core engine arrived on 8-27-08, yesterday (8-26-09) we fired it up for the first time. We did not plan it this way, it just happened.
So on to the good stuff. We were lucky enough to source a D series engine (D303)for the project. We rebuilt the engine with an aggressive streetport. It required two new housings so we opted for two brand new 20B housings, just to keep the numbering correct. Exhaust sleeves have all been swapped for FD's. The Exedy twin disc clutch was used to get the power to the trans.
Complete 20B breakdown: http://www.banzai-racing.com/20B_engine_breakdown.htm
Complete Rebuild: http://www.banzai-racing.com/20B_rebuild.htm
We decided it was a perfect time to strip the engine bay and have it repainted. So we delayed the project by a few weeks so that this could be done:
Engine bay shots through the project: http://www.banzai-racing.com/20B_eng...transition.htm
For the turbo we went with the Garrett GT42RS (102mm) with the Tial 1.01 v-band turbine housing. We also used the Tial 60mm wastegate.
More pics of turbo, wastegate, manifold, and downpipe: http://www.banzai-racing.com/20B_installation3.htm
Engine management is the Microtech LT-16 (one of the very first in the country when we bought it). We designed a custom adapter harness to make it plug and play with the hybrid Cosmo/FD engine harness that we made. This made it much simpler to keep the speedo, wipers, fan relays, etc all functioning normally. Honestly when looking in the engine bay it looks like there is a OEM engine harness, that is because it is.
There was lots and lots of custom piping, bracketry, etc. to make for the project. We made a custom Greddy elbow to mate to the 20B TB. We used a custom mounted Koyo N-flow and dual 25 row oil coolers to keep the fluids cool. Every vacuum, fuel, oil coolant line is all ss braided.
Now we get to start driving it and putting some break in miles on it. The initial short trips have already been a blast, the car spins the tires with any blip of the throttle.
The entire year long project can be seen on our website : http://www.banzai-racing.com/20B_installation3.htm
Video of the car running: Maiden voyage http://www.banzai-racing.com/20B/ban...den_voyage.mpg
Video of exhaust: Still burning off lots of crap http://www.banzai-racing.com/20B/ban...aust_sound.MPG
So on to the good stuff. We were lucky enough to source a D series engine (D303)for the project. We rebuilt the engine with an aggressive streetport. It required two new housings so we opted for two brand new 20B housings, just to keep the numbering correct. Exhaust sleeves have all been swapped for FD's. The Exedy twin disc clutch was used to get the power to the trans.
Complete 20B breakdown: http://www.banzai-racing.com/20B_engine_breakdown.htm
Complete Rebuild: http://www.banzai-racing.com/20B_rebuild.htm
We decided it was a perfect time to strip the engine bay and have it repainted. So we delayed the project by a few weeks so that this could be done:
Engine bay shots through the project: http://www.banzai-racing.com/20B_eng...transition.htm
For the turbo we went with the Garrett GT42RS (102mm) with the Tial 1.01 v-band turbine housing. We also used the Tial 60mm wastegate.
More pics of turbo, wastegate, manifold, and downpipe: http://www.banzai-racing.com/20B_installation3.htm
Engine management is the Microtech LT-16 (one of the very first in the country when we bought it). We designed a custom adapter harness to make it plug and play with the hybrid Cosmo/FD engine harness that we made. This made it much simpler to keep the speedo, wipers, fan relays, etc all functioning normally. Honestly when looking in the engine bay it looks like there is a OEM engine harness, that is because it is.
There was lots and lots of custom piping, bracketry, etc. to make for the project. We made a custom Greddy elbow to mate to the 20B TB. We used a custom mounted Koyo N-flow and dual 25 row oil coolers to keep the fluids cool. Every vacuum, fuel, oil coolant line is all ss braided.
Now we get to start driving it and putting some break in miles on it. The initial short trips have already been a blast, the car spins the tires with any blip of the throttle.
The entire year long project can be seen on our website : http://www.banzai-racing.com/20B_installation3.htm
Video of the car running: Maiden voyage http://www.banzai-racing.com/20B/ban...den_voyage.mpg
Video of exhaust: Still burning off lots of crap http://www.banzai-racing.com/20B/ban...aust_sound.MPG
Last edited by Banzai-Racing; 08-27-09 at 03:57 PM.
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08-27-09, 05:14 PM
#11
We used the Hinson subframe, but we had it e-coated for durability, also installed a de-powered steering rack from Maval
We designed the manifold, using the RB flange and then had it Jet-Hot ceramic coated.
There are pictures of everything on our site.
08-27-09, 06:00 PM
#14
Thanks for all the compliments. The goal was to make it as "factory" looking as possible, so that someone that doesn't know RX7's wouldn't know that this wasn't the original engine. Obviosly it is a little more shiny.
08-27-09, 06:40 PM
#16
Here are the side views of the engine bay. All nipples on the UIM and LIM were removed, tapped and plugged or a fitting installed.
..and for those tht have asked via PM, it idles at a smooth 900rpm and is currently pulling 16" vacuum
..and for those tht have asked via PM, it idles at a smooth 900rpm and is currently pulling 16" vacuum
08-27-09, 06:43 PM
#17
That is beautiful. Love the fresh paint in the 'bay, looks like it's still wet 
Looks kind of funny, the shock tower nuts are painted too 
What are you expecting for power/torque on this thing? Running pump fuel? Water injection? Please post your dyno chart when you get it!
Looks kind of funny, the shock tower nuts are painted too What are you expecting for power/torque on this thing? Running pump fuel? Water injection? Please post your dyno chart when you get it!
08-27-09, 06:53 PM
#18
I am making a custom strut tower bar, so those nuts will not be there much longer, no need to remove them until the bar is done.
Yes it is running pump gas, we will see what it makes when the engine has enough break-in miles. I don't ever make predictions on power. I will tune it to 15psi first and see what it puts down, then think about installing AI.
Our 91 vert, the little sister to this has the Cosmo 13b-re with a GT35R it makes 435rwhp @15psi (pump fuel) on a Mustang Dyno. This should make more then that
Yes it is running pump gas, we will see what it makes when the engine has enough break-in miles. I don't ever make predictions on power. I will tune it to 15psi first and see what it puts down, then think about installing AI.
Our 91 vert, the little sister to this has the Cosmo 13b-re with a GT35R it makes 435rwhp @15psi (pump fuel) on a Mustang Dyno. This should make more then that
