I am rolling my engine rebuild into my turbo build thread since now both will be done at the same time. I really wish the S2 motor swap was realistic :lol:

don't make me repeat myself ..... :p:

I haven't been noticing any less oil consumption than usual and I am premixing usually 6-8oz of 2-stroke with every fill up also; but after installing my turbo I realized my OMP hose and Jet air hose were accidentally swapped (meaning my OMP hose was connected Pre-TB to my chargepipe). Luckily I noticed this error before I had any tunes and I had not hit any positive manifold pressures before swapping the hoses back to their correct places. I now have a high pitched noise and a strong vaccum coming from my OMP hose connected just downstream of my MAF sensor (been there since I moved the lines back to their correct position). Check out his Video:


http://www.youtube.com/watch?v=Jxc498WVMPk




The line I am plugging with my thumb is the OMP hose.

I'm just hoping to get a little insight as to what might be causing this sound but from this thread and a few others I have read I am thinking that it is potentially one or more of my check valves on the OMP injectors. I see MM's post said it could be a potential issue on boosted motors but AFAIK nothing has been adversely affected (yet).

Has anyone seen this before or have any insight to if my guess about the check valves is correct? Thanks in advance!



Do you know what the cost of a new set of oil injectors is? I'm hoping to replace mine along with some of the lines.

^ +1



Edit: sorry if any of this has be covered previously but I am reading through this thread as we speak....

I believe the injectors were 50 each but honestly a buddy works at the dealer and go them for me at his price so I'm not sure.

In the UK the oil injectors are 64 GBP each.

Two of mine whistle when blown through but pass the leakdown tests just fine. I get the same sound you describe if I disconnect the hose.
I've heard a few others mention it too, usually noticed when aftermarket intakes are fitted.

^ hmm yeah it's very loud, I can hear it through the hood when I'm parked or at stoplights in traffic even, but I might try to pull those injectors and leakdown test each of them. If they are still good I wonder if fitting a check valve to my OMP intake hose would reduce the noise.... now just to find the time!!

Bump :)

Why?

Because there is some good discussion here :)

Very good, I learned a lot!

Don't forget about me!!
 

Still only one engine here she is running fine!!

How many miles?

If the above is true.... Wouldn't introducing a restriction to the omp vacuum line increase oil use?

If I'm not mistaken, I read something like that on the German RX-8 forum. IIRC some folks did a similar type of mod.

Assuming your talking about my previous post?

This is correct..... a restriction of the vac. line to a total opening of 2 mm increases the engine oil consumption from approx. 0,3 ltr per 1000 km to approx 0,5 ltr per 1000 km........I tried it myself and indeed these values were observed..........I have restored it to the original vac. opening because I prefer to premix.........
Below the relevant link......
http://www.rx8forum.de/index.php?pag...26291&pageNo=1

45k Not a daily driver. 90% time driven on mountain roads having fun. A few track days, couple long vacation trips. Premix since 5-6k miles, oil changes average every 2k with 5/20 until last week. Went to 15/40. Knocking wood now!! No problems at all, still running like new.
My first rotary, a car guy by definition, change all other fluids very regulary(like driving on a 600 mile vacation, in 100 degree temps, change oil, drive home, change oil)
Love this thread!! Love to learn and listen.
Thanks to all

Yep... thanks Ruud, that's the thread I remembered.
(it requires registration to be able to view it, but the pics are pretty self-explanatory for those who don't understand German.)
Not sure I'd want to go this route though, I also rather premix.

FYI-I'll burn 1-1.5 quarts of oil per 2k miles. Premix 6-8oz, yamalube per tank(or more depending of plans for right foot!) seafomed last month. Will seafome oil injectors this weekend.
Thanks for the tip
Great service from Roswell Mazda-Archie is the Man!!

This is something I'm defiantly trying out. Thanks for that link.

Yes very self explanatory. I also pre-mix 4-6ozs, but would still like to increase oil consumption.


RotaryMachineRx, sorry I must have missed that post, most of my forum reading is done at work on my phone so its easy to get side tracked.

For that, I trust MazdaManiac's AP tune which increases the OMP rate as far as I know... that and my 6 oz premix per fillup should hopefully be enough :)

:uhh: Well I cant really afford that atm... Next $500 is going to shocks anyway. My warranty ends next month, I'll more than likely have one by the end of the year... Until then I wanna give this a shot.

I figured, most of the people that brag about having original motors have low mileage. Don't jinx yourself man. My first engine lasted 22k, second 74k, and third 30k. It's sort of hit or miss, even more so with remans. We just had our first 07' fail in the SARX group, it's a well maintained 07' with 49k on it.

it really sounds like hit or miss...

I have always wondered, does premix even help? In theory it certainly does, but I haven't seen any statistical data, plus I haven't seen anyone came out with a 150k engine and said I premixed from day one. Hence I wonder...

^ it's almost impossible to tell since Mazda likes rebuilding engines with used parts.