NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   how many apex seals are left (https://www.nopistons.com/northwest-28/how-many-apex-seals-left-59831/)

jenkin 06-07-2006 07:57 PM

so, a good engine will go pft,pft,pft, pft,pft,pft..... yes?

how many seals are left if it goes pft, , , , , , ,?

two?

time for a rebuild? https://www.nopistons.com/forums/pub...1047683664.gif

nofxpunk_541 06-07-2006 08:20 PM

we may need a little more info than how many "pft's" there are... like how the engine reacts, when it did it, what you were doing... ext...

VROOOOOMZOOM 06-07-2006 09:02 PM

what car are we talkin about john? thought you just got a new engine!

rmriggin 06-07-2006 09:55 PM

If I remember right you should have 6 puffs for every 2 complete e-shaft rotations. Any less means most likely apex seal issues/failure.

hornbm 06-07-2006 11:12 PM

for a good motor with all the plugs you you should have 6 puffs for 3 rotoations. Every rotation of the eccentric shaft allows a rotor to fire once.



A rotor with one blown apex seal will make only one puff, with the other chamber plugged up of course. Two puffs would indicate a blown side seal.

rmriggin 06-07-2006 11:14 PM

thanks for correcting me on that. I wasn't completely sure.

Hyper4mance2k 06-08-2006 02:41 AM


Originally Posted by hornbm' post='823093' date='Jun 7 2006, 09:12 PM
for a good motor with all the plugs you you should have 6 puffs for 3 rotoations. Every rotation of the eccentric shaft allows a rotor to fire once.



A rotor with one blown apex seal will make only one puff, with the other chamber plugged up of course. Two puffs would indicate a blown side seal.



I'm pretty sure that one rotation of the eshaft means two puffs since we displace the entire displacement of the engine per rovolution. Only 4 stroke pissedons displace half per revolution. That's why people call our cars 2.4 or 2.6 Liters. cause a 5.0 only fires off 2.5L per rev, where as we fire all 1.3L per revolution.



http://www.rotaryengineillustrated.c...tions/RE3a.php



Each rotor fires once per revolution of the eshaft. remember the front is doing exactly the opposite of the rear. Hense two puffs per revolution.

Hyper4mance2k 06-08-2006 02:49 AM

http://www.rotaryengineillustrated.com/vid...os/REmotion.mov

here you can see both moving. watch the tick mark on the eshaft and look at both rotors. Two puffs per revolution of the eshaft.

hornbm 06-08-2006 12:20 PM

yeah thats exactly what I said... if we wanna get REALLY technical, there should be one puff for every 180 degree rotation of the eccentric shaft

Hyper4mance2k 06-08-2006 12:48 PM

WOW I so read what you posted backwords. I'm lisdexic sometimes. LOL Plus I don't think the drinking helped...


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