Engine Rebuild. Porting Tips?
02-09-06, 12:41 PM
#26
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On primary and secondary I ported mine "up" and "out" about as far as I felt comfortable doing without hitting water jacket or getting too far into corner seal path. I tried to keep the port closing similar to stock port.
On exhaust, I basically enlarged to match the steel inserts.
Mike
On exhaust, I basically enlarged to match the steel inserts.
Mike
02-10-06, 12:32 AM
#27
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Originally Posted by philiptompkins
can you leave the tape on the rotors to hold the seals togather when you drop it in? it seems like this would make it easyer, or would this cause other problems?
Originally Posted by theagavejazz
looks good man, I was going to take my stuff next week to get ported but I might do it myself seeing how good yours came out. save some cash to get a header...
Originally Posted by Sideways7
You lucky bastard. Heres what I had to work with
how could you work in there. after kicking and stepping on crap. I would kill myself.
Originally Posted by trickfc
On primary and secondary I ported mine "up" and "out" about as far as I felt comfortable doing without hitting water jacket or getting too far into corner seal path. I tried to keep the port closing similar to stock port.
On exhaust, I basically enlarged to match the steel inserts.
On exhaust, I basically enlarged to match the steel inserts.
02-10-06, 12:42 AM
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Misc Info
Engine rebuild includes:
New Mazda Apex Seals & Springs
New Mazda Oil Control Rings
New Mazda Oil Control O-Rings
New Mazda Side Seals & Springs
New Mazda Corner Seals & Springs
New Mazda Oil Pump
New Mazda Rotor Bearings
New Mazda Stationary Gear Bearings
New Mazda Needle Bearings
New Mazda Thrust Bearings & Washers
New Mazda Oil Chain
New Mazda Gasket Set
Side Housings Lapped by Racing Beat
Injectors Cleaned and Flow Tested by RCEngineering
The bill added up fast.
Engine rebuild includes:
New Mazda Apex Seals & Springs
New Mazda Oil Control Rings
New Mazda Oil Control O-Rings
New Mazda Side Seals & Springs
New Mazda Corner Seals & Springs
New Mazda Oil Pump
New Mazda Rotor Bearings
New Mazda Stationary Gear Bearings
New Mazda Needle Bearings
New Mazda Thrust Bearings & Washers
New Mazda Oil Chain
New Mazda Gasket Set
Side Housings Lapped by Racing Beat
Injectors Cleaned and Flow Tested by RCEngineering
The bill added up fast.
02-10-06, 06:46 AM
#30
Looking good man. I can't wait for my housing and irons to get back so I can build my engine. I have not ported anything before, so I didn't want to risk it. I sent them to Brian Cain at BDC. I need to find some junk housing so next time, I will do it myself.
Bills seem to add up really fast when you build a motor.
Bills seem to add up really fast when you build a motor.
02-10-06, 10:20 AM
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Originally Posted by Sideways7
You lucky bastard. Heres what I had to work with:
02-10-06, 11:38 AM
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Everything looks pretty good, congradulations. Hope you don't end up like me. Every year I pull my engine to change porting, clutch etc... I can't seem to help myself, constantly want to change everything.LOL.
Brent
Brent
Last edited by brent clement; 02-10-06 at 11:41 AM.
02-10-06, 12:14 PM
#36
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Originally Posted by brent clement
Everything looks pretty good, congradulations, I'm just a little
confused about the spacer deal. If you sent the irons out for resurfacing you
should have more not less end play. Make sure your thrust bearings
aligned properly.
confused about the spacer deal. If you sent the irons out for resurfacing you
should have more not less end play. Make sure your thrust bearings
aligned properly.
02-10-06, 02:20 PM
#37
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Lapping the irons has no effect on end play.
That's strictly a function of the thrust plate, thrust bearings, & the spacer sleeve in the middle.
Mine was .0035" too much, so I had to grind down the spacer.
That's strictly a function of the thrust plate, thrust bearings, & the spacer sleeve in the middle.
Mine was .0035" too much, so I had to grind down the spacer.
Last edited by SureShot; 02-10-06 at 02:24 PM.
02-12-06, 03:14 AM
#40
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more.. theres my buddy that's been helping me with the rebuild. he builds engines at his work. this was his first rotary. he wont admit it now but you can tell he loves it. LOL. without him, i would be no where near as done
02-12-06, 04:30 AM
#42
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How do you guys figure lapping doesn't effect end play? It shortens the motors overall length, so unless your eshaft shortens itself automatically, you'll have more end play right? Fill me in if there's something I'm missing here.
Brent
Brent
02-12-06, 09:18 AM
#43
Originally Posted by GTR
Nice Engine Stand Sideways7
02-13-06, 10:03 PM
#44
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Originally Posted by brent clement
How do you guys figure lapping doesn't effect end play? It shortens the motors overall length, so unless your eshaft shortens itself automatically, you'll have more end play right? Fill me in if there's something I'm missing here.
Brent
Brent
02-14-06, 04:35 AM
#45
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Yes, a thicker spacer to take up the extra end play from shortening the block. Anyway, didn't mean to jack the thread. The reason I even posted is that if you reuse all the same parts and all of a sudden you have no end play, there's something wrong.
Brent
Brent
02-14-06, 06:39 AM
#46
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A late suggestion for sideways7:
When handling the irons & housings, keep them on a wood or cardboard surface.
When you put them on a hard floor it's easy to ding the oil pan sealing surface & the corners of the side sealing surfaces.
There is only one end-play & position limiter.
It's the thrust disc that bolts to the front plate.
The spacer sleeve between the torrington bearings sets the end play.
When handling the irons & housings, keep them on a wood or cardboard surface.
When you put them on a hard floor it's easy to ding the oil pan sealing surface & the corners of the side sealing surfaces.
There is only one end-play & position limiter.
It's the thrust disc that bolts to the front plate.
The spacer sleeve between the torrington bearings sets the end play.
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