Bridgeported

For a powerful 20B, if you had to choose between an Electromotive TEC II, Haltech E6K, Microtech MTX-12, which would you use, and most importantly WHY?

I can't afford a Motec, or the new versions (TECIII, E11K, Wolf4d), and these seem to be the most comman systems everyone with 20B's are using.

Evil Aviator

I understand the cost issue with the Motec and TECIII, but the Haletch E11 and Wolf 3D 4.0 are only a few hundred dollars more than the lower-end Haltech E6K. The TECII retails for over $2,000 the last time I checked.

I haven't used any EMS other than the Wolf, but this is what my personal research would recommend:
Drag Racing: Microtech MTX-12 - Cheap EMS, poor injector resolution doesn't make much difference for drag racing.
Road Racing: Haltech E11 - Good price, can run split timing, excellent injector resolution, can run electrical OMP.

If you don't know what you are going to do about the ignition system, then you may want to consider one of the TEC units, as their price isn't all that bad when you factor in the price of a complete ignition system. You may want to check with Electromotive to see if their less-expensive TECI will run a 3-rotor with split timing now with the new software.

I like the Wolf, but it doesn't have datalogging or 3-rotor split timing capability, so most of the people on this forum would prefer the E11 which has the same injector resolution.

Bridgeported

I see E6K's for sale often in the $1100-$1300 range, so an E11 would retail about $1500? That's not bad.
I thought a TEC II would have dropped in price by now, but I guess if you figure in the igntion system, then it's still a good price.

My limit would be $1500 max for ignitionless or $2000 max with ignition.

Evil Aviator

The E11 is new, so the pricing isn't quite set, but it looks like it's going for $1,500 - $1,700, which is well worth the extra money IMO vs. the E6K.
https://www.rx7club.com/forum/showth...hreadid=127814

I think the TECI is probably going to be better than the TECII. The TECII is really more of a drop-in package deal for particular makes and models of cars, while the TECI has more flexibility. Talk to Electromotive for more details.

If you are really strapped for cash, then you probably shouldn't be considering a 20B swap. I promise you that it will cost more than you think. Anyway, I think the Microtech units are the cheapest thing going right now.

Bridgeported

20B swap will happen - and I know it will cost me a lot - and I expect even more than I plan! But that's ok
It will be worth it in the end.

I'll talk to electromotive about those units and see what they have to say.

Any real downside to the E6K on a 20B?

Evil Aviator

Nobody seems to like the boost control function, so you will need an expensive boost controller if you want that function. Also, it will not run split timing for emissions, and it doesn't have the injector or ignition & fuel map resolution of the E11 and Wolf3D 4.0. Also, the DOS-only software is hopelessly outdated by today's standards, although Motec is also stuck in the dark ages. Really, the only thing that the E6K has going for it is that it has been around for a long time, so you at least know that it is somewhat reliable and you can get support from others who have used it. Also, I don't think that the quality of the E6K is as good as the Wolf3D, although it seems like a lot of people have had good results with the E6K anyway.

See this thread for more info:
https://www.rx7club.com/forum/showth...hreadid=126283

Bridgeported

Thanks for all the help! I'll continue my research.

3Rotor

The TEC II will not run a 20B. You either need a TEC I or a TEC III. The main reason is that the TEC II can not handle two crank angle sensors, the TEC I can and the TEC III can operate with only one.

Turbo 3

iTrader: (3)

I have a TEC I for sale for $1800 shipped that is already setup for the 20B per SR Motorsports specs. It already has a set of dual probe coils (3 coils per bank, one bank for Leading, one for Trailing) for your high capacitance ignition. Also comes with oxygen sensor and 2-bar map sensor. It was $2800 new!

I haven't used it yet but if you want it, I need a decision within the next week or I'll be too far along in my project and will be forced to use it.

The TEC II will not work easily with the 20B. Like Evil said, it's like the PMS for FD's. It is manufactured as a drop-in system to specific types of motors. You must go with a TEC I or a TEC III for Electromotive products to run a 20B.

We can help each other out, you buy mine for a an extremely reasonable discounted price, and I can move on with my project Please PM me to discuss!!!

Bridgeported

The price sounds nice, but I'm not in the position to start buying parts for a few more months

j9fd3s

iTrader: (3)

i have an e6k on my 20b and ive had my share of bugs and setup problems, but the car drives really well

mike

Evil Aviator

1) You don't need two crank angle sensors if you run the 3-rotor by firing both the leading and trailing plugs at the same time ala the 13G and 20B race engines.
2) You can use two TEC II computers.

However, the TEC II obviously isn't a good choice when compared to the other EMS products available unless you can get it for one heck of a price.

Bridgeported

I will be firing both leading and trailing at the same time, regardless of which EMS system I end up using.

Jeff20B

iTrader: (13)

I can't fire L and T at the same time 'cause I'll be carbed. Thanks for the evil info, Aviator.

Attila the Fun

iTrader: (1)

None of the above. Try the Electromotive Tec3. It is an all-around better package than the Tec II. In addition, since Russ Turner worked on the PFS 3-rotor conversions while employed there, he added some 20B-friendly features to the Tec3 design when he went to work for Electromotive.

For example, the Tec3 has the conversion for the tach output built-in. With my Tec II, he had to build a separate device for making the 3-rotor output work with a 2-rotor tach.

Bridgeported

TECIII is too much more money for how much more benefit you gain. I'd even consider a used system, but that is out of the question pretty much with a TECIII.

Attila the Fun

iTrader: (1)

Something I forgot to mention: If you go Tec II, you have to have 2 of them.

That's the other advantage to the Tec3. You only need one.

If I wasn't planning to sell my car, I'd sell the Tec II's and upgrade to the Tec3.

zyounker

The ECU is one of the most important peices to this project why skimp here? get the best one. Cut corners on your turbo or something.


But if you are going to, go tecI or haltech. Both should work fine. The tecI has a nice ignition. but with the haltech you can just use TII coil packs..



-Zach