NoPistons -Mazda Rx7 & Rx8 Rotary Forum - Are The Apex Grooves Hardned?

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- Rotary Engine Building, Porting & Swaps (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/)

- - Are The Apex Grooves Hardned? (https://www.nopistons.com/rotary-engine-building-porting-swaps-55/apex-grooves-hardned-44199/)

Rub20B

02-03-2005 01:37 PM

Hi,

I'm in a slow process of building my 20B..

Are the stock 2mm grooves hardned? My rotors will be machined 3mm, but do I need to let hard the grooves again, the engine will produce around 600rwhp with a big single...

Greetz

Jeff20B

02-03-2005 02:49 PM

People have said that they're hardened, but I've seen slop which tells me they are the same hardness as the rest of the rotor. My 20B's apex seals are kinda sloppy. I'd like to have them machined for 3mm but I'm curious if the slots really are hardened or not.

astrochild7

02-08-2005 01:48 PM

I've always heard they were...

Rub20B

02-09-2005 05:05 PM

Do you also know wich way they're hardned? Nitrated or by heat or..?

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