Wow what a thread lol. Which rotor did you test 1st the front or rear? The compression will usually be lower on the 2nd rotor tested as the battery will drain down cranking etc. Break in period? Who on earth came up with that? The Mazdacomp break in period is done over hours not days lol. Its something like the 1st 2 hours below 6,000rpm the next 2 hours under 7,000rpm or something like that lol. When we do a compression test the 2 mandatory things are 1st the Mazda factory compression tester and 2nd a battery charger on the battery in "start" mode so the cranking rpm doesnt fluctuate during the test.

I agree with Joe, way too much overthinking lol

Most race engine " breakin" is done on an engine dyno...very controlled circumstances :)

It is appropriate to do a breakin on a street engine if there were new bearings...other than that there really isn't much point

And yet ...... most FI engines fail on the rear rotor .

Analyse that

Most race engine owners with lots of money break in engines on dyno's lol. Us poor people just find a track and drive around for a couple of hours bringing the engines up to rpm gradually. I cant see why a new street engine wouldnt be "broken in' after a week at the most.

Mehhhh... I'm not so much worried about the engine as I am the clutch.

The clutch disc/pressure plate/flywheel are usually "mated" after about the 4th time you leave a stop light. No different than bedding in a set of brakes. Frictional material to a metal surface lol. Next.......................lol :)

HAHA soon my friend soon.new motor is sitting at scarbrough mazda and awaiting my new clutch and some other stuff coming up from BHR.

ok so here is the results

2004, 112k km, oil changed every 3k km and after track days, regular dino oil.

rotor 1 4.9 5.4 5.6 RPM 265
rotor 2 5.3 5.7 5.1 RPM 260

FAIL!

new engine, new clutch. Watch out REV comin for Ya!:evil_laug

Shhhhhiiii...... Lol. I'm have to figure something else out to keep you in the rear view ;)

What did you get from BHR?

Are you doing the engine or Mazda?

I would love to be around for an engine install

this thread caught my eye.
i have always suspected that we have an unbalanced intake. The intake charge between the front and rear rotors I think will be different. i dont have a flow bench to test out my therory.
I do wonder if anyone has ever tested the egt differences between the rotors- i am almost willing to bet that there will be a significant difference.
I also wonder if it has to do with all the front e shaft flat bearing wear we have seen?

quote=REV-illusions;4296757]Shhhhhiiii...... Lol. I'm have to figure something else out to keep you in the rear view


What did you get from BHR?[/quote]



Err boost is the next step i think.:evil_laug got a few things, Clutch kit, ignition kit, fuel pump, fuel line adapter for gauge.





Unfortunately this was done under warranty but i have plans for the future you may be interested in.





I would agree with you on that one OD.