I'm Just curios due to the fact that I hate MY S5 right now. I bought it with a blown engine, put a new engine in, and now it goes into limp mode and dies because of a bad OMP. The OMP Fried the ECU as well.
I ordered a Brand new OMP and am looking for a used ECU locally now.

I'm just about Fed up with RX-7's for the first time ever but it's not going to stick.
I should have gotten another S4, but the GTUs was calling my name.

Thats my story.

Why did they make the switch? These electric OMP's seem like more of a hassle than anything else.

 

technology? its nice to put more electrical components into a motor when new because it sets up for less moving parts and less failure. it cleans up the engine bay for other things to be put in its place and its easier to do. my .02

 

standalone and premix ftw!

 

IIRC it was for reduced oil consumption. With the electrical OMP they can precisely control the rate of injection based on many more paramaters than you could with a purely mechanical system.

 

That makes sense. I wish they could have made it more bulletproof. Thats just one more way the environmentalists screw us car guys though.

As for Premix and a standalone, I'm not ready for a car with that yet and I don't feel like the N/A is worth that when the mods are Pineapple 5/6 port sleeves and an open exhaust. I was this to just be a low maintenance FC that I can just gas up and go AutoX with. I plan to get an S4 T-II in the future when I have a house and can afford to build a crazy car.

I now understand why the S4 guys love their 7's and s5 guys always have a pain in the ***.

 

sell the new omp to me! I hate premixing during the winter my s4 can use it(with haltechs help)

 

Ya, it's electrical for better based on more parameters. Better control means only as much oil as you need it which means less consumption. The s4 OMP is more reliable. IIRC the s4 OMP controls oil flow via a mechanical link to the throttle.

 

I'm sure it wasn't the enviromentalists, it was the owners. Owners would have complained about having to top up the oil every now and again, especially if it causes damage to the engine or sets off the low oil warning light+buzzer. A lower frequency of top ups would help reduce complaints.

As for the reliability, the newest of the FC's are 17 years old. It's an old car, things break, expect it and deal with it. It's not going to be 100% reliable like a newer car might be. If you want a 100% reliable car, get something newer.

 

I know its an old car and its gonna have issues.
My first FC was an 87' and the only big problem I had with it was the tranny blew up, and the outer flywheeel ring broke.

I have an 05' GTI as a DD. The RX-7 is my money pit.

 

For the 1 reson I dont want to premix and want ot run the omp. Im getting a haltech E8.

I know some guys that are trying to sort out a stand alone unit that will control the OMP with just tps input. So you can run a micro etc and then this other unit and have the omp working.

At this stage its not going very well :P Personally I know nothing about stepper motor programing.

 

Just swap out the front cover, OMP & throttle body with an S4. With minor mods to the omp connecting rod, grinding off a little nub on the TB the swap is easy. You need to have an input to the S5 omp to get out of limp mode. Shoulda coulda woulda!!

Ramses666

 

A new OMP is $1,400.

 

It's for flexibility.
Mazda knew the mechanical OMP was using too much oil, so they went with a programmable one.
Instead of ******* with valves and flow rates, just change a couple lines of code in the ECU, and you get customized oil metering.
In the long run, it's cheaper that way.


-Ted

 

Don't buy the used ECU......now's a perfectly good excuse to buy an S5 Rtek 2.0!

 

I know, I bought one.

I know I couldve gotten a standalone, blocked off the OMP and premixed, but I don't want to with this car.

 

Why would you buy a new one when you can buy a used one on here for $50?

 

Remember that what's electric is the stepper motor that controls the flow. The pumping action is mechanical. On the brand new '09 Rx-8's, the OMP is now 100% electric.

 

Standalone and premix FTW! It was a pain at first but now it's easy peasy. Added bonus, I've gotten really good at estimating how many gallons of gas remain based on what the gas gauge says.

 

So I dont have to worry about messing with it again when a used one goes bad.
I also don't want to wait for a used one to get here. I just put a reman in the car and dont want to have to have any more crap under the hood go bad.
I had lots of options, but thats the one I chose. Even if it is expensive.
I plan to get an S4 T-II later on and mod it.

 

Rtek is plug and play, btw. It even looks like a stock ecu!

 

I know, I looked into it. I didnt want to send my ECU out, or have to tune with a PDA.

I just want to keep the car simple for a little while, I don't want it to become more of a money pit right now. I'm trying to buy a house soon.

 

A $1400 OMP makes it a money pit... doesn't it?

 

disregard