What Could Cause the Blow by??
02-27-07, 02:25 PM
#1
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What Could Cause the Blow by??
As the title says,
I would like to know all the possiblities for a blow by???
I have a new build engine !! it is Street Ported and pined!! the first three week it wasn't smoking but about month or 6 weeks later, it starts to smoke a little.
Whats even more wierd. I have a GT40 .88 A/R that made 284@16psi.. Not Normal AFR is 10.3-11 no matter how more boost i increase, still richer it get or about 5hp/psi increased!!!!!
also blow by.. what can causes it?????????????
any inputs from the pros.
I would like to know all the possiblities for a blow by???
I have a new build engine !! it is Street Ported and pined!! the first three week it wasn't smoking but about month or 6 weeks later, it starts to smoke a little.
Whats even more wierd. I have a GT40 .88 A/R that made 284@16psi.. Not Normal AFR is 10.3-11 no matter how more boost i increase, still richer it get or about 5hp/psi increased!!!!!
also blow by.. what can causes it?????????????
any inputs from the pros.
02-27-07, 06:02 PM
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Originally Posted by mirabile
Are you sure it is oil smoke? Define, "smoking a little"
When you first got it rebuilt it did not smoke at all?
When you first got it rebuilt it did not smoke at all?
when i first rebuild it, it didn't smoke at all !!
My set up is 100% right. enough fuel 1000/1600 Aeromotive. -8 lines everything is right !!
02-27-07, 06:21 PM
#6
Rotary Enthusiast
^ nah man something is defenatly wrong , 16psi ...dude you should be makeing a lot more power ,
are you pre-mixing? if so are you using too much ?
is youre timing right?
is youre turbo ok?
are all your`e plugs firing?
are you pre-mixing? if so are you using too much ?
is youre timing right?
is youre turbo ok?
are all your`e plugs firing?
02-27-07, 06:24 PM
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Denial, it's not just a river in Egypt. There is something VERY wrong with your setup, given you are making about 130-150 rwhp less than you should be.
The oil smoke is most likely because you need a restrictor in the oil feed line to the turbo.
The oil smoke is most likely because you need a restrictor in the oil feed line to the turbo.
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02-27-07, 06:49 PM
#8
I won't let go
Originally Posted by rynberg
Denial, it's not just a river in Egypt.
Hahahaha....oddly enough, that's the second time I've heard that exact statement today. The first time referencing Ron Santo again not getting into the hall...
/offtopic
02-28-07, 05:09 PM
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Originally Posted by 93FD3S
How many miles are on the turbo? Any shaft play? Oil residue in the housings?
02-28-07, 08:05 PM
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Originally Posted by GoodfellaFD3S
Who built the motor? It wasn't that hack shop Fuego Racing was it? If so, I'm not surprised your FD is jacked up 
02-28-07, 09:15 PM
#14
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Originally Posted by BeNO
!! why is that?
https://www.rx7club.com/showthread.p...ighlight=fuego
and
https://www.rx7club.com/showthread.p...ighlight=fuego
and
https://www.rx7club.com/showthread.p...ighlight=fuego
and
https://www.rx7club.com/showthread.p...ighlight=fuego
Seeing a bit of a trend here?
02-28-07, 10:08 PM
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Yeah, I have looked at them before..
I know some of the people who responded. and know this story. I don't want to get in to it.
This Thread is to know the causeings of the blow-by ?
I know some of the people who responded. and know this story. I don't want to get in to it.
This Thread is to know the causeings of the blow-by ?
02-28-07, 10:32 PM
#16
Originally Posted by BeNO
This Thread is to know the causeings of the blow-by ?
Blow-by is normally the result of-->
Excessive side seal clearance or weak side seal springs. Same for corner seals/springs.
Out of spec side housings from high mileage etc. Side housings that have not been surfaced/lapped properly.
Bad or worned out oil control seals and springs.
Extreme case of blowby resulting from-->
Cracked rotor or from out of spec bearing clearances causing the tip of the rotor to come in contact with the side housings resulting in the corner and side seal getting stucked.
Too rich a fuel mixture causing oil wash/break down from side housings etc.
Last edited by crispeed; 02-28-07 at 10:49 PM.
02-28-07, 11:37 PM
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your #'s are terrible, people make more power on stock twins with LESS boost. I don't mean to be rude but seriously a single turbo making under 300hp AT16 PSI???!?!!?!?!!!?!!eleventyone!!
03-01-07, 01:40 AM
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Since your car doesn't smoke right away and then starts, I would wager on oil restrictor pill, but it could be something wrong with the motor as Crispeed went into.
You still seem to be an ostrich with his head in the sand about your setup, something is SERIOUSLY wrong for you to be making such low power. I would check the ol' compression.
You still seem to be an ostrich with his head in the sand about your setup, something is SERIOUSLY wrong for you to be making such low power. I would check the ol' compression.
03-01-07, 08:21 AM
#22
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Originally Posted by BeNO
Hey Thanks Crispeed 
As much as it sound bad, it the best input sofar
As much as it sound bad, it the best input sofar
03-02-07, 05:28 PM
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quick question. how hard is it to rebuild 13b engines ?
I would realy like to learn how to work on the engine. were I am from, when I finish my Degree, we don't have rotary engines therefore i must know how to work on it in case something happens.
I would realy like to learn how to work on the engine. were I am from, when I finish my Degree, we don't have rotary engines therefore i must know how to work on it in case something happens.
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