These rotors I have the apex seal grove is a little too big I think. The clearance with the apex seal in the grove I can just fit a .006'/ 0.15mm feeler gauge at the top of the gap between the rotor and apex seal, a .0025' / 0.060mm can fit all the way to the bottom of the grove

What will happen if I used this rotor?
Could the apex seal brake, or won't it seal right, or could the apex get japed up or something like that?

 

0.006" is way too loose.&nbsp 0.002" - 0.003" is stock standard.&nbsp I wouldn't go more than 0.004" if possible; race clearances max out at 0.0045".

Running such loose tolerances will not make as much power as a tigher motor.&nbsp Break-in will take slightly longer - i.e. compression will take a little longer to max out.&nbsp The motor will not last as long, as the looser groove will cause the apex seal to eat the rotor tips (and corner seals) a lot faster than normal.&nbsp Once that groove starts to erode, compression and power will suffer.&nbsp I doubt such a motor will last 100,000 miles.



-Ted

 

Thanks RE-TED

Well that rotor going in the bin
This other rotor I have I can just fit .004' 0.10mm in the gap at the top but it wont go down more that 1mm , should I use this rotor

The engine is a series 4 13B turbo

 

The apex seal needs to go down flush with the tip of the rotor.


-Ted