Opinion Wanted On Piston Damage

latil · Post by **latil** » Sun May 22, 05 10:25 pm

I have seen this before but on a 2 stroke,that was most definately a spark plug starting to break up. I'm with the hard carbon/gasket/butterfly screw theory unless your air filter only stops bricks

Looks ok to clean up and keep running though

db · Post by db » Sun May 22, 05 10:32 pm

Defly debris damage- trashed enuff 2-strokes in my early days of mechanicking to recognise the signs!!
I've had far worse than yours Dave with no further problems, long as it ain't bent a valve or dinked a seat (not a problem on 2-smokes o'course!).
Though i guess on a real hi-po engine marks like that could cause hot-spots and pre-ignition?

Dave-R · Post by **Dave-R** » Mon May 23, 05 9:31 am

I suppose even a small bit of something dense would make impact craters like that given enough velocity.

OK well that has all been VERY helpful chaps. Thanks!

I will check the valves and seats in due course. I will also have to stop running up the strip with no air filter on.

Shame because there is a definate improvement in top end power when running with just the baseplate. I WISH someone would make a six pack filter just ONE INCH taller so that it will still fit under the R/T hood but flow enough air for the top end charge.

Jeff · Post by **Jeff** » Mon May 23, 05 9:35 am

Dave, make one! You can do it I know!

Dave-R · Post by **Dave-R** » Mon May 23, 05 10:45 am

If I could make one I would. Do you know something I don't?

I was wondering if I could take a couple of 3-inch tall filter elements off something else and join them together....

Jeff · Post by **Jeff** » Mon May 23, 05 11:09 am

I think..

These K&N filters are great... They seem to really flow, and are cleanable! Pricey but they last!

Jeff · Post by **Jeff** » Mon May 23, 05 11:27 am

DAVE!!

Update... part number K&N E-3840 is the same as above, but 3 inches tall.
So two of those will do the job.

Dave-R · Post by **Dave-R** » Mon May 23, 05 1:33 pm

I need 3 inches TOTAL otherwise it hits the hood. In fact it might hit the hood anyway. The six pack intake is mighty tall. The stock size K&N filter which I have is 2" tall and it does not flow enough. Better than stock but not enough.

Two filters one on top of the other is too tall. But I think I might just get away with a 3" if they are making one.

I will look up that last part number. I checked this out just a couple of months ago and there was only the stock height filter.

Dave-R · Post by **Dave-R** » Mon May 23, 05 1:40 pm

Yes! That is it Jeff. Spot on! THANKS MATE!

Jeff · Post by **Jeff** » Mon May 23, 05 1:46 pm

My pleasure mate...

Dave-R · Post by **Dave-R** » Mon May 23, 05 1:52 pm

Come to think of it I emailed K&N about wanting a taller filter. I wonder if they took notice??? Surely they wouldn't produce one on the evidence of one e-mail? No. I doubt it. But if it fits under a R/T hood it will be a big step up for all us six-packers.

Jeff · Post by **Jeff** » Mon May 23, 05 1:58 pm

But was it only one Dave, orwas you one of many?

Jon · Post by **Jon** » Mon May 23, 05 2:01 pm

I thought K&N would make any filter you wanted?

Dave-R · Post by **Dave-R** » Mon May 23, 05 4:14 pm

Jon wrote:I thought K&N would make any filter you wanted?

Maybe. They never responded to my e-mail.

Anonymous · Post by **Anonymous** » Mon May 23, 05 8:13 pm

Frame 15 definately suggests FOD. You can actually see craters, though how something could get pushed onto the surface that hard and still manage to leave a raised area around the impact I have no idea. I have seen damage on cavitated marine props like this before, but with something swirling around in the ocean I have always assumed the craters were unrelated to the erosion.

I have no idea why I just said all of that, I'm really not helping am I?

If anyone has a sunseeker that needs a service, I'm your man!

Mopar Muscle Association UK

Opinion Wanted On Piston Damage

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