engine teardown, 1 scalloped rotor?
#1
engine teardown, 1 scalloped rotor?
this is from an 89 with about 110k on it. so I pulled my motor from a bad coolant seal and began to take everything apart and clean the sonovabitch and to my surprise the front rotor appears to be scalloped but very lightly. I've held a scalloped rotor before so this confused me.
the texture looks too uniform to not be machine done, it feels like the bathtub texture on the rotor, but all over it.
here are some shots, they are a bit blurry but you can kinda see the one on the left is the textured one and the one on the right is the smooth one. neither of the rotors are completely cleaned (yet) and neither show any signs of damage.
I need a better camera or a steadier hand the flash kept ******* up the shots so yeah lol.
this gave me the hunch that his has been taken apart before, that and the giant F on the front rotor housing.
is this scalloped lightly or what?
the texture looks too uniform to not be machine done, it feels like the bathtub texture on the rotor, but all over it.
here are some shots, they are a bit blurry but you can kinda see the one on the left is the textured one and the one on the right is the smooth one. neither of the rotors are completely cleaned (yet) and neither show any signs of damage.
I need a better camera or a steadier hand the flash kept ******* up the shots so yeah lol.
this gave me the hunch that his has been taken apart before, that and the giant F on the front rotor housing.
is this scalloped lightly or what?
#2
NASA-MW ST4
iTrader: (7)
I dunno, if someone actually tried to scallop them. That is the most baby scallop ever. Probably not even worth it. It would actually make me skeptical of the rotor.
Edit: pfft, I was about to show you a real scalloped rotor. But now I remember which set of scalloped rotors you saw!
Edit: pfft, I was about to show you a real scalloped rotor. But now I remember which set of scalloped rotors you saw!
#3
87 SE WITH S5 T2 SWAP
iTrader: (11)
that is not a scalloped rotor. A scalloped rotor gets some material removed from the side that closes and opens up the intake ports(close to the side seal area right at the edge of the rotor)in order to open up the intake earlier like on a bridgeported application but without cutting the eyebrowns on the plates and the motor will run and idle like a bridge if the cuts on the rotors are well cutted.
#6
I dunno, if someone actually tried to scallop them. That is the most baby scallop ever. Probably not even worth it. It would actually make me skeptical of the rotor.
Edit: pfft, I was about to show you a real scalloped rotor. But now I remember which set of scalloped rotors you saw!
Edit: pfft, I was about to show you a real scalloped rotor. But now I remember which set of scalloped rotors you saw!
it still ran great (when it didnt flood on startup) when I pulled it but it was a little down on power...
I didnt notice any excessive vibration because I have solid motor and trans mounts
I wanna slap the person who rebuilt this motor, not to mention not using 3rd gen corner seal springs...
this is the first S5 i've torn down
now I need to find a second rotor because I do not want to use s4 rotors.
to the max
#7
NASA-MW ST4
iTrader: (7)
Those look like two S5 rotors to me.
I think the carbon left in the pocket is confusing and makes it look like a non machined surface. Look closely at the third pic and notice the spots that are shiny clean.
You would know if it was 1 S4 and 1 S5 rotor, it would shake horribly. I mean horribly. I mean you would have gone WTF ZOMG!!!!
Regarding the 1-12 stamps, I have no clue but the Mazda seal case has two 1-6 designations. http://www.pineappleracing.com/mazdasealcase.aspx
I think the carbon left in the pocket is confusing and makes it look like a non machined surface. Look closely at the third pic and notice the spots that are shiny clean.
You would know if it was 1 S4 and 1 S5 rotor, it would shake horribly. I mean horribly. I mean you would have gone WTF ZOMG!!!!
Regarding the 1-12 stamps, I have no clue but the Mazda seal case has two 1-6 designations. http://www.pineappleracing.com/mazdasealcase.aspx
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#8
okay well Im an idiot but it still looks funny. and if there was an s5 and s4 rotor at high rpm that much imbalance would likely snap the eccentric shaft.
and I guess I was wrong about the seal case.
I'll have them cleaned next wed and maybe take a better photo but the two surfaces are distinctly different.
and I guess I was wrong about the seal case.
I'll have them cleaned next wed and maybe take a better photo but the two surfaces are distinctly different.
#9
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ive seen a few s5+ rotors machined like that, even NEW ones its like the bit was a little dull that day or something.
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