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an RX8er's rebuild thread

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Old Jul 12, 2012 | 06:41 PM
  #1276  
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Weight of rotor is good enough? I figured some sort of dynamic measurement would be far superior since it spins pretty fast.
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Old Jul 12, 2012 | 06:42 PM
  #1277  
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Originally Posted by shadycrew31
I might need to use it as well... depending on tomorrows test results .
Originally Posted by 9krpmrx8
Sweet more good stuff for me to bum off of you when I do this
I am going to see if my old irons are in tolerances and maybe have them lapped

I need a 3" micrometer now
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Old Jul 12, 2012 | 06:45 PM
  #1278  
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^ I am sure there is but I have to assume Mazda did at least 1 thing right on my reman
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Old Jul 12, 2012 | 07:15 PM
  #1279  
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i think what Team is referring too is at the increased rpms the better the seal should be due to the action of centrifugal force on the apex seals?
At the same time--the engine will actually run at a very high rpm without a apex seal even in place.
Trick is cranking it. It doesnt run well either lol.
Team I do remember good analogies--that was a good one you posted some time back.
You used the same e shaft/ rotors that came out of the same engine right?
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Old Jul 12, 2012 | 08:12 PM
  #1280  
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yep I followed that (I watched all Rob's vids 2 or 3 times.)

I forget my specific weights but they were very close to eachother (its somewhere in this thread). The letters are "C"
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Old Jul 12, 2012 | 09:11 PM
  #1281  
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I'm sorry but a balance my understanding helps performance and smooth Rpms ,, I've seen many many rotary builds with no balancing at all and many last a long time and perform good, I've seen some like this but I've been told, oil pressure , Gas starvation etc, not a balancing issue. Im not balancing mine and I'm ordering final parts for my build and pressing my stationary bearing this weekend hopefully so once I get my parts in is going together and hopefully soon I'll be running around. Everything is stock no port at all just my BHR ignition kit that's it. Good luck bro but if I was you I'll just get a complete new engine and start fresh buying parts sell this parts to make up for new engine you may have way better luck.
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Old Jul 12, 2012 | 09:15 PM
  #1282  
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Thanks man, but I am good with all my still new parts. I will get it figured out and be on the road soon enough
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Old Jul 12, 2012 | 09:21 PM
  #1283  
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Not your new parts I mean core an engine with low low miles and start from their , swap your new parts to new donor I think with an engine with very low miles your safe as along the engine is good. I think you will save Aton and be better off. Just saying
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Old Jul 12, 2012 | 09:29 PM
  #1284  
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oh I got cha...something to consider
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Old Jul 13, 2012 | 11:54 AM
  #1285  
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aha= now I realize more into what Team was saying--leakage from chamber to chamber will also increase the likihood of detonation and could be a tuning nightmare--those weird a/f ratios you where seeing were likely from not having a stable combustion chamber pressure.
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Old Jul 13, 2012 | 12:25 PM
  #1286  
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yep....could be the culprit
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Old Jul 14, 2012 | 02:57 PM
  #1287  
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Is solid corner seals are good or bad because recently i am going buy parts from Atkins rotary...
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Old Jul 15, 2012 | 09:07 AM
  #1288  
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oem corner seals guys---come on now. This is a tried and true product. When it comes to seals on a NA street driven engine--unless you go ceramic--there are NONE better than oem. the only thing i would consider is having the taller seals/corner seals installed.
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Old Jul 15, 2012 | 10:08 AM
  #1289  
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To be fair nothing on this engine is tried and true, that's why its still considered an experiment.

That said from what I just researched solid corner seals are a no go.
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Old Jul 15, 2012 | 03:18 PM
  #1290  
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lol--true that! They are just the best that I know off --so far.
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Old Jul 15, 2012 | 05:02 PM
  #1291  
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I have solid corner seals....just not mazdas
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Old Jul 15, 2012 | 05:09 PM
  #1292  
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OEM mazda is a two piece setup. the only solids on the market are atkins.
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Old Jul 15, 2012 | 05:14 PM
  #1293  
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Originally Posted by olddragger
oem corner seals guys---come on now. This is a tried and true product. When it comes to seals on a NA street driven engine--unless you go ceramic--there are NONE better than oem. the only thing i would consider is having the taller seals/corner seals installed.
I am just not sure I want to mill the rotors for taller seals?
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Old Jul 15, 2012 | 08:19 PM
  #1294  
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Cam at Pettit racing has milled a number of rotors for the taller seals. Dont attempt that yourself--it takes a laser--seriously.
if you know for certain you are going FI it will be worth it. If you are staying NA--probably not.
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Old Jul 15, 2012 | 08:34 PM
  #1295  
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oh no...I wouldnt do that myself....lmao....I know my limits

I posted a link earlier were Goopy is offering that service for $250 I beleive.....FI in a plan down the road just dont know how much my will do now
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Old Jul 16, 2012 | 11:17 AM
  #1296  
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ugh...all my tools will be here mid week....I am so impatient
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Old Jul 16, 2012 | 06:28 PM
  #1297  
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I was wrong...nothing like christmas in july.... got some tools and my holster...been wait for a year for this thing.

E-shaft has 0 run out
edit: I did not measure it on the sheet....I know thats what you guys are thinking.

edit: Rob suggested to run the irons through a heat cycle 4 or 5 times before I measure them....kind of interesting......if I am going to be **** retentive I might as well be **** retentive

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Last edited by houstonrx8er; Jul 16, 2012 at 06:31 PM.
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Old Jul 16, 2012 | 06:31 PM
  #1298  
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I told u it's not e shaft. It rarely fail, unless some idiot torque the belt down with an impact or the bearing completely failed and chew the e shaft at the same time


Throw the apex seals away, go OEM or ceramics, new housing, DONE
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Old Jul 16, 2012 | 06:32 PM
  #1299  
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ordering oem all the way around

Slightly used atkins for sale
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Old Jul 16, 2012 | 06:34 PM
  #1300  
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Originally Posted by houstonrx8er
I have solid corner seals....just not mazdas
2 piece is bettet for sealing at low speed and idle.

OEM corner seals have dlc on it and will last pretty much the life of the engine.
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