20B N/A build thread -- 3rd rotors a charm

charlies7 · 06-05-2009, 08:25 PM

Sup guys..

Car has been down for almost 2 years..Alot of it was because I took it apart before I went to school, then getting lazy, and on top of that I like to buy and sell crap.

Anyways..

Recently picked up a 20b shortblock. It is a early number series with less than 30,000KM. When I got the engine is was dirty but the inside looked really clean. Compression also seemed like it was there so that is a plus.

I am doing this build cause I love the simple look of the NA 20b and the SOUND!!!!!

The engine was sent out to Glen Weaver over at Arizona Rotary Rockets for a complete build. Glen does some great port work and has shown that he is one of the top engine builders in the country. Check out his site at www.azrotaryrockets.com

The engine is getting the following done:
LARGE streetport with some more special touches. Going to be extremely aggressive
Dynamic balancing to 9500 RPM's
Re-ground irons
All the rotor housings and irons are shot blasted and throughly cleaned from previous use
All new OEM seals
S5 NA rotors -- 9.7 compression ratios
New bearings
Pretty much the engine is going to be like new when I get it back.

For mounting I will be retaining the stock subframe and the engine will be about a inch higher than the stock 13b. I dont know what the new drive line angle will be but I will figure it out if anyone cares. It has been done before by several shops so I am not concerned about the change.

I will be ditching the AC, Power steering, and ABS to clean everything up. Hopefully I plan on relocating all fuse boxes in the engine bay, and removing the stock fan relays because I can run everything off of the ECU.

Exhaust

I will be making my own equal length exhaust manifold. 2 inch primaries into a burns stainless SS merge collector. The outlet will be 3.5 inches and will carry out to the back of the car. I plan on only running only one Magnaflow race muffler, but I will make the exhaust so I can put another muffler section in if it is too loud. I dont think I loud 20b will sound bad though

Intake

This is the tricky part of the entire build -- Plan is to fully machine barrel type ITB's. I have the solid model done and I will upload a .jpg image later tonight. Design was done by my cousin, but it might be changed up to my liking. They will work with a GM D-shaft TPS and roll on ball bearings. Everything will be sealed with orings to ensure no leaks. Each throttle body is 60mm to feed the LARGE intake ports.

Concept desgin

Fuel

Fuel will be done by CJ motorsports, Brandon (oorx7) will be making my fuel rails and setting up my lines etc. This wont be his typical fuel setup because I will be using a ITB setup so the secondary rail will be different. I will be using a turbosmart fuel pressure regulator, only cause I have one lying around . 6 Evo 8/9 injectors will be used. I believe they are 560cc and are low impedence.

Cooling

Probably one of the most important parts behind a rotary is the cooling system..Well I plan on making this simple and I plan on doing that with a electric water pump. Recently picked up a Meizere 55 GPM pump and a Meizere block adapter. I plan on ditching my old fluidyne radiator and getting something a little thicker. Something with more volume and better flow.

Anyone have any ideas?

Oil coolers will just be stock R1 dual oil coolers.

Engine management

Tec3r is the choice for this. Found it to be a great EMS and with much reading on other fourms seems to be user friendly. It will be able to control my EWP and fan, has many aux inputs and has great ignition technology. I will also be using there 60 tooth trigger wheel and ignition system.

Tuning!!!

Tuning will be done by a local rotorhead that is highly qualifed in my book. Has been tuning my car for years and always with great success.

Plan is to hit 400whp with the ITB setup.

Ill add whenever I get some more info..Hopefully it will be all good information because the next info I get will be Glen with the condition of my engine.

Please feel free to chime in and give some ideas.

06-05-2009, 08:25 PM	#1
charlies7 one broke moderator Join Date: Feb 2008 Location: Chicago Posts: 319 Rep Power: 18	20B N/A build thread -- 3rd rotors a charm Sup guys.. Car has been down for almost 2 years..Alot of it was because I took it apart before I went to school, then getting lazy, and on top of that I like to buy and sell crap. Anyways.. Recently picked up a 20b shortblock. It is a early number series with less than 30,000KM. When I got the engine is was dirty but the inside looked really clean. Compression also seemed like it was there so that is a plus. I am doing this build cause I love the simple look of the NA 20b and the SOUND!!!!! The engine was sent out to Glen Weaver over at Arizona Rotary Rockets for a complete build. Glen does some great port work and has shown that he is one of the top engine builders in the country. Check out his site at www.azrotaryrockets.com The engine is getting the following done: LARGE streetport with some more special touches. Going to be extremely aggressive Dynamic balancing to 9500 RPM's Re-ground irons All the rotor housings and irons are shot blasted and throughly cleaned from previous use All new OEM seals S5 NA rotors -- 9.7 compression ratios New bearings Pretty much the engine is going to be like new when I get it back. For mounting I will be retaining the stock subframe and the engine will be about a inch higher than the stock 13b. I dont know what the new drive line angle will be but I will figure it out if anyone cares. It has been done before by several shops so I am not concerned about the change. I will be ditching the AC, Power steering, and ABS to clean everything up. Hopefully I plan on relocating all fuse boxes in the engine bay, and removing the stock fan relays because I can run everything off of the ECU. Exhaust I will be making my own equal length exhaust manifold. 2 inch primaries into a burns stainless SS merge collector. The outlet will be 3.5 inches and will carry out to the back of the car. I plan on only running only one Magnaflow race muffler, but I will make the exhaust so I can put another muffler section in if it is too loud. I dont think I loud 20b will sound bad though Intake This is the tricky part of the entire build -- Plan is to fully machine barrel type ITB's. I have the solid model done and I will upload a .jpg image later tonight. Design was done by my cousin, but it might be changed up to my liking. They will work with a GM D-shaft TPS and roll on ball bearings. Everything will be sealed with orings to ensure no leaks. Each throttle body is 60mm to feed the LARGE intake ports. Concept desgin Fuel Fuel will be done by CJ motorsports, Brandon (oorx7) will be making my fuel rails and setting up my lines etc. This wont be his typical fuel setup because I will be using a ITB setup so the secondary rail will be different. I will be using a turbosmart fuel pressure regulator, only cause I have one lying around . 6 Evo 8/9 injectors will be used. I believe they are 560cc and are low impedence. Cooling Probably one of the most important parts behind a rotary is the cooling system..Well I plan on making this simple and I plan on doing that with a electric water pump. Recently picked up a Meizere 55 GPM pump and a Meizere block adapter. I plan on ditching my old fluidyne radiator and getting something a little thicker. Something with more volume and better flow. Anyone have any ideas? Oil coolers will just be stock R1 dual oil coolers. Engine management Tec3r is the choice for this. Found it to be a great EMS and with much reading on other fourms seems to be user friendly. It will be able to control my EWP and fan, has many aux inputs and has great ignition technology. I will also be using there 60 tooth trigger wheel and ignition system. Tuning!!! Tuning will be done by a local rotorhead that is highly qualifed in my book. Has been tuning my car for years and always with great success. Plan is to hit 400whp with the ITB setup. Ill add whenever I get some more info..Hopefully it will be all good information because the next info I get will be Glen with the condition of my engine. Please feel free to chime in and give some ideas.

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