After six years of getting by with a stock 20B, I've upgraded things a
little. For those of you who might be interested, I've posted pictures
of the internal upgrades on a new page on my site:

http://www.cris.com/~Asam/EngineUpgrades.html

Those who have not visited the site might want to go in the "front
door" at:

http://www.cris.com/~Asam/20B.html

 

George, are you going to bag the stock twins and go with a single?

Regards,
Brian

 

Eventually. I'm trying to do this in an orderly fashion:

1) Upgrade the cooling system.
2) Upgrade the engine management to a Tec3r.
3) Upgrade to the single turbo.

With the increase in power, there is sure to be an increase in heat. My current system is adequate, but barely so. The twin Tec-IIs are adequate, but they are "old tech". The Tec3r is state-of-the-art, and PFS has a boatload of maps from their other 20B cars.

 

nice ..i liked the beveled rotors

 

Were the bevels done on a CNC?

 

I hate questions like this one, since I have to reveal my almost limitless ignorance. What is a CNC?

Frankly, I wouldn't know the answer to your question, even if I knew the answer to that question. You should ask Kevin at Rotary Resurrection.

George

 

Looking good George! You had that motor going for quite a while. How many miles did you get out of it?

 

I wish more people answered that way instead of talking out of their a$$!

 

http://www.gocadcam.info/faq.html quick explanation. I was just wondering if it was done on a machine or done by hand. Looks great though.

 

Looks great! I'm not sure when i'll make my jump out of stock block but theres no real need/cashflow for it at the moment.

 

Thanks. Approximately 72,000 miles.

As it turns out, the detonation wasn't due to my stupidity. (I had thought that I just pushed the car too hard on a cold winter night with a map that wasn't calibrated for winter.) When Ray had the car at PFS, he discovered that one of the secondary injectors would shut off intermittently, causing an instant lean condition. He finally tracked it to an electrical connector that would just quit connecting for no apparent reason.

That made me feel better. Having the expense of a re-build is traumatic. Thinking that you're the cause of it is salt in the wound. If I hadn't been blind-sided by the failing connector, I'm sure the motor would have lasted twice as long, based on Kevin's description of the interior. He said the rest of the motor didn't look like it had more than about 3000 miles on it.

 

I have to agree, which is why I answer like that.

George

 

Thank you. My ignorance is now somewhat diminished. AFAIK, it was done by hand. Rotary Resurrection is a small, one-man operation. I don't believe that Kevin has that kind of relatively expensive equipment. If you want to be sure, though, check with him.

George

 

Thanks. I feel your pain. I hadn't planned to do this for another three years or so--just for that reason. However, when the motor had to be re-built, anyway, the cost for the additional work is peanuts compared to the re-build cost. It doesn't hurt to have it done, and it gets me ready for the single turbo down the road.

George

 

Glad to see you got it back together, I have upgraded my car from tecII to tec3r as well, this is a decision you will NOT regret. I'll have to meet up with you and DLane at some point to show you my progress.

 

Thanks for the feedback. When spending boatloads of money, it's always nice to be told that it is the right thing to do.

George

 

Hot Dam thats a nice FC with a 20B to boot. Id say check out the link ecu @ linkecu.com It has an auto tuning feature (closed loop) when used with a lambda probe. Just enter desired A/F ratio and done.

 

Thanks. I looked at the link ecu site, but I didn't find any prices. I don't know of anyone currently using one in a rotary-powered car. I really don't want to be a pioneer.

I'll go with the Tec3r, since I can count on support and experience, including well-developed maps, from PFS. Also, Electromotive is only 65 miles away, so I can deal with them directly in the very unlikely event that something would crop up that Ray couldn't handle.

FWIW, the Tec-II and the Tec3 can enter a closed loop with a wide-band. I have one, and it made a noticeable improvement in fuel mileage. However, as I understand it, it's more reliable - especially on turbo cars - to go open loop with mapped values during acceleration. Note: I do not claim to be an expert on tuning. That's why I take the car to Ray.

George

 

Youre right. At higher rpms you go richer as to where closed loop you stay constant at a pre determined A/F ratio. I use Link. It was easy to install and easy to use.