rapid cylinder wear w/pics again
Aug 29, 2012, 12:28 PM
#1
rapid cylinder wear w/pics again
https://www.evolutionm.net/forums/wa...ar-w-pics.html
just rebuilding my engine again. this engine has about 3.5 years and 20,000 miles on it. the first 10,000 the engine was run on torco and 93 octane. the second half of its life was run with ethanol injection. two 650cc injectors in IC pipe that mirror duty of 880cc primary at 5psi.. running 10.5-11/1 A/F ratios. 21-24psi HTAgreen 2.3 stroker. Mahle pistons.
the pistons just kept getting noisier with age. finally coudnt take the sound anymore. here are the rapid cylinder wear pics. the exhaust side shows which pistons were rocking. the fuel ring is missing at the top of those bores. no 1 is worst, followed by number 3. This car is tuned with DSM link. nice feature of link is you can log all four cylinders for knock . no 1 has always been the quietest under boost. followed by number 3 cylinder. this coincides with those two cylinders wearing out the fastest from receiving the most fuel.
I was met with much dissension in 2007 when I made a thread about this. I have much better tuning and data to support my claim this go round. Pretty discouraging there is so much wear so quickly. I will try upper cylinder lubricant this go round.
just rebuilding my engine again. this engine has about 3.5 years and 20,000 miles on it. the first 10,000 the engine was run on torco and 93 octane. the second half of its life was run with ethanol injection. two 650cc injectors in IC pipe that mirror duty of 880cc primary at 5psi.. running 10.5-11/1 A/F ratios. 21-24psi HTAgreen 2.3 stroker. Mahle pistons.
the pistons just kept getting noisier with age. finally coudnt take the sound anymore. here are the rapid cylinder wear pics. the exhaust side shows which pistons were rocking. the fuel ring is missing at the top of those bores. no 1 is worst, followed by number 3. This car is tuned with DSM link. nice feature of link is you can log all four cylinders for knock . no 1 has always been the quietest under boost. followed by number 3 cylinder. this coincides with those two cylinders wearing out the fastest from receiving the most fuel.
I was met with much dissension in 2007 when I made a thread about this. I have much better tuning and data to support my claim this go round. Pretty discouraging there is so much wear so quickly. I will try upper cylinder lubricant this go round.
Aug 31, 2012, 08:13 PM
#5
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I to am running a motor with some piston slap i would like to run it for another month before i pull it out its only been in the car for two weeks am i hurting the motor or messing up the bores driving it ? i get mixed answers no meth on my setup just hta86 and 18 psi but its very loud.
question # 2 does that torco stuff really work ? ive just heard about it recently.
question # 2 does that torco stuff really work ? ive just heard about it recently.
Last edited by mrboost05; Aug 31, 2012 at 08:16 PM.
Sep 1, 2012, 11:23 AM
#6
I to am running a motor with some piston slap i would like to run it for another month before i pull it out its only been in the car for two weeks am i hurting the motor or messing up the bores driving it ? i get mixed answers no meth on my setup just hta86 and 18 psi but its very loud.
question # 2 does that torco stuff really work ? ive just heard about it recently.
question # 2 does that torco stuff really work ? ive just heard about it recently.
if you have offset piston pins and they were installed backwards they will be noisy all the time as well.
torco works okay for what it is. I used 2 oz per gallon. for ~96 octane. problem for me is I devoloped a headache that wouldnt go away. and it did indeed go away after I stopped using the stuff. I suspect there is poison in the mix.
Last edited by 94AWDcoupe; Sep 1, 2012 at 11:26 AM.
Sep 1, 2012, 04:38 PM
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that depends on why it has piston slap in first place? these mahle pistons are 4032 so they can be set very tight and they should be really quiet as a result. the current loosness of the old slugs would not be a problem with 2618. as they would tighten up when hot. if you have 2618 they will be quiet .005 and under. .0055-.0065 will be noisy when cold but quiet warm. above .007 they would likely be noisy all the time. (these quotes apply to zero offset pins )
if you have offset piston pins and they were installed backwards they will be noisy all the time as well.
torco works okay for what it is. I used 2 oz per gallon. for ~96 octane. problem for me is I devoloped a headache that wouldnt go away. and it did indeed go away after I stopped using the stuff. I suspect there is poison in the mix.
if you have offset piston pins and they were installed backwards they will be noisy all the time as well.
torco works okay for what it is. I used 2 oz per gallon. for ~96 octane. problem for me is I devoloped a headache that wouldnt go away. and it did indeed go away after I stopped using the stuff. I suspect there is poison in the mix.
I have the older style je pistons i am not sure if they are 2816 like the newer asymmetrical ones they are however noisy when cold and noisy when hot i bought the motor from a friend so i am not sure of any of the clearences i suspect it will be like the video of your motor and there is enough stuff already i suppose i will die from so i think ill leave the torco alone lol
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Sep 3, 2012, 02:52 PM
#10
all four cylinders are worn. not just the two . but the fact that two are worn more than the other two clearly indicates airflow in the manifold is not equal. has nothing to do with atomization of the ethanol. even without ethanol in the air the four cylinders dont run the exact same a/f. although I am sure it gets worse. intake manifold just favors cylinders by design.
