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Oil metering pump elimination

Old 10-06-2011, 12:53 AM
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How high is your fuel mapping table programed for?

Do you have a rev limiter set, at what point?

Does it run strong up to that "Soft" limit right now, or does it seem the engine is not making enough power to rev itself to 10K RPM?
Old 10-06-2011, 04:12 AM
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Originally Posted by PhillipM
I guess is not a myth anymore.

You are one of them
Old 10-06-2011, 05:22 AM
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3oz in 5 gallons is not enough without the OMP, try that in a gallon with some decent race premix and you're nearer the mark
Old 10-06-2011, 06:19 AM
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Originally Posted by VICEdOUT
So if all these things are controlled by the Haltech now, how come I cant rev up past like 4 to 6 k RPMs? Is it the lack of an OMP or maybe the plugs are fouled?
Perhaps you can define: "Can't rev up past like 4 to 6k"?

Is it hitting a hard line like a lowered rev limiter? Is it simply not getting spark or fuel that high? Is it just not able to because of going excessively rich or lean?

For example, limp mode is more like a lowered rev limiter. Unplugging the MAF makes the engine try to flood out it's dumping so much fuel through and keeps it from reving beyond about 3k.
Old 10-06-2011, 09:09 AM
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talk with Eric Meyer before you delete the OMP. The findings that he shared with the forum suggested that you will get accelerated side seal wear with power lost if you delete it. Eric said it didnt matter how much you pre mixed--the omp needed to stay on the engine.
I really dont understand the value of removing it?
Old 10-08-2011, 07:33 AM
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Well it's all Tunning right now, I got it to rev up much higher than 4 by leaning out the fuel maps and VE tables a little.. So it was excessively rich and wouldn't rev up lol... My OMP has lost power thru the elimination of wiring to the stock ecu and right now Im leaning towards completely removing the stock ecu and being fully stand alone with Haltech.


Has ANYONE tried the gravity fed reservoir idea sitting higher than the oil Squirters ? Will there be pressure from the motor sucking in the oil or pushing it up ? ---Disconnecting the clear oil lines from the OMP and rising them above into a reservoir somehow is what I had in mind...

I read that long thread about the importance on the OMP and how it lubricates the side seals, I know and trust me guys I would like to keep this thing working somehow.
I mean that is the evolution of the Rotaries now havin 3 squirters... But how about the RX7's running lots of boost with ONLY one squirter... Hmm.. And PhillipM saying he does not run his, maybe a Renesis CAN live without an OMP...... Hmmmmm

Last edited by VICEdOUT; 10-08-2011 at 07:37 AM.
Old 10-08-2011, 08:55 AM
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Talk to Eric Meyer.

Seriously.
Old 10-08-2011, 09:20 AM
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Originally Posted by RIWWP
Talk to Eric Meyer.

Seriously.

Does he have an email address, why doesn't he shine some light on this topic..
Old 10-08-2011, 10:49 AM
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He doesn't frequent the board. He occasionally drops by, offers tons of valuable information, then gets irritated at how it is handled and received in various ways by various people, and drops off for a period of time again.

So he probably hasn't seen the thread.

Go to the top of the page, click member list, search for his name, "EricMeyer", then either send him a PM or use the email feature to send him an email.
Old 10-08-2011, 11:05 AM
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How do you have the Haltech wired? Which unit? Throttle? The OMP is an actual pump...so it really doesn't matter where the oil comes from as long as the pickup is full since oil ia a basically non-compressible liquid
Old 10-08-2011, 01:20 PM
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So can I just give a switched 12v power to the OMP and be all good? I have a Haltech Sprint RE wired how it should be and using a throttle cable TB.
Old 10-08-2011, 04:47 PM
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Talk to Scott again...the pump needs tp be hooked out to an output that allows correct stepper signal to the pump

Not a simple 12v connection by far
Old 10-08-2011, 09:14 PM
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Originally Posted by dannobre
Talk to Scott again...the pump needs tp be hooked out to an output that allows correct stepper signal to the pump

Not a simple 12v connection by far
see attached
Attached Files
File Type: pdf
S1 MOP.pdf (63.2 KB, 318 views)
Old 10-08-2011, 09:53 PM
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Originally Posted by TeamRX8
see attached

Sooo according to that attached file, the OMP is not even needed to really feed the rotor housings with the stock oil squirters and clear lines, as long as there is fluid dropping down them.. right > ?
Old 10-08-2011, 10:10 PM
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Where did you interpret that

The motor pumps the oil through the nozzles......controlled by the signal from the PCM
Old 10-09-2011, 03:52 AM
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Originally Posted by dannobre

The motor pumps the oil through the nozzles......controlled by multiple signals from the PCM
fixed
Old 10-09-2011, 09:46 AM
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I dunno... But there's gotta be another way to get that pump working or just to get oil to come out from the squirters other than the Adapter plate which still utilizes the OMP...
Old 10-09-2011, 10:04 AM
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yes, choose an aftermarket ECU that can operate it properly
Old 10-09-2011, 11:49 AM
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Originally Posted by VICEdOUT
I dunno... But there's gotta be another way to get that pump working or just to get oil to come out from the squirters other than the Adapter plate which still utilizes the OMP...


The Sprint RE won't run the MOP as far as I can tell....Scott had told me a couple of years ago they had figured out how to get it to run on a 2000...but it wouldn't work well enough to keep the stock PCM happy .....


You sure your injector staging isn't your problem? When I was running the Haltech on mine it was a PIA to get it to run in the secondary transition when the injectors all came online

Also check the ignition setup and timing.....they didn't read the stock trigger when I did it and it caused me a bit of grief also....
Old 10-09-2011, 01:06 PM
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Well I snagged this sprint RE off Ebgay for $840 brand new, I doubt I will ever get a better model since they are more than $1500 or 2 grand! This one has to be good enough to work on an 8 since it was made for it and the 7's..
The Staging could be tuned better yes and timing settings are set to what the 8 requires.. That still doesn't resolve the issue I have at hand.. Squirters..
And yeah I might have jumped into conclusions and went in tough directions with this project I'm doing but theres gota be a way to get around this OMP with the stock ECU thing.. I really appreciate all the helpful input from everybody, so far ya'll been real helpful and not haters like other Online Car Clubs.. lol

Last edited by VICEdOUT; 10-09-2011 at 01:09 PM.
Old 10-09-2011, 01:31 PM
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As long as you aren't using the stock PCM to run the throttle you should be able to use it to run the dash and the MOP, etc. Even if it thinks it is in limp mode it won't matter...cause it uses the throttle to limit the engines output. AFAIK there aren't any other things limp mode will do

You likely need to adjust your AFR's around the 4K-6K range...when all 6 injectors come on where you have them staged you will get a **** ton of fuel

How do you have the injector staging set? Primary hold mode? Do some logs and see just how much fuel you are getting at the transition
Old 10-09-2011, 01:54 PM
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Originally Posted by dannobre
As long as you aren't using the stock PCM to run the throttle you should be able to use it to run the dash and the MOP, etc. Even if it thinks it is in limp mode it won't matter...cause it uses the throttle to limit the engines output. AFAIK there aren't any other things limp mode will do

You likely need to adjust your AFR's around the 4K-6K range...when all 6 injectors come on where you have them staged you will get a **** ton of fuel

How do you have the injector staging set? Primary hold mode? Do some logs and see just how much fuel you are getting at the transition

Yup Primary hold just like the Manual says to set it to for an Rx8... Man so maybe leaving the stock ECU there to run the OMP might have to be done then..
I sent Eric Meyer another email, see what he thinks..
Old 10-10-2011, 10:01 AM
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Don't eliminate lubrication from the squirters to their intended area. I have lots and lots of experience w this
Old 10-10-2011, 10:10 AM
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Originally Posted by EricMeyer
Don't eliminate lubrication from the squirters to their intended area. I have lots and lots of experience w this
Any other suggestions for this specific setup ? No stock ecu, using Haltech Sprint RE, how can that area get lubricated alternatively ?
Old 10-10-2011, 10:28 AM
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Originally Posted by maskedferret
To drive you completely away from this pre-mix only idea, realize that this is a drive by wire system. What happens to fuel input when you let off the gas around 9k rpm while in gear? Where is your lubrication now?

Well depending on what the Cut Delay is set to on the Decel Cut, the injectors will continue spraying for a set amount of time after the throttle hits 0% so that will compensate and keep lubricating while shifting gears or any time the Pedal gets DePressed. Also there should be enough residue from a rich mix/map to remain in there in between shifts as well (that about the residue I'm just talking out of my *** but seems logical lol)

Last edited by VICEdOUT; 10-10-2011 at 01:20 PM.

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