No More Ping - FINALLY
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Tourer
Joined: Jul 2006
Posts: 310
Likes: 23
From: Sykesville, MD
Milling the heads and using a thinner gasket "increased" the compression. I am hardly an expert, so please correct me if I am wrong, but I kind of doubt that increasing compression will correct a pre detination issue. From what I understand, increasing compression would only make it worse. Sounds like Gunny is saying the exact opposite. Am I misinformed?
Banned
Joined: Mar 2007
Posts: 3,706
Likes: 7
From: Woodstock, Ont , Can
The deck height was basically nothing (could not fit a .004 feeler gauge under the straight edge). I used a .036 gasket instead of the stock .045. Therefore my squish was roughly .045 and now is roughly .036. The heads were milled .026 in order to reduce the combustion chamber to 82 cc's.
Milling the heads and using a thinner gasket "increased" the compression. I am hardly an expert, so please correct me if I am wrong, but I kind of doubt that increasing compression will correct a pre detination issue. From what I understand, increasing compression would only make it worse. Sounds like Gunny is saying the exact opposite. Am I misinformed?
Milling the heads and using a thinner gasket "increased" the compression. I am hardly an expert, so please correct me if I am wrong, but I kind of doubt that increasing compression will correct a pre detination issue. From what I understand, increasing compression would only make it worse. Sounds like Gunny is saying the exact opposite. Am I misinformed?
Ron
Road Warrior
Joined: Nov 2007
Posts: 1,984
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Point is, the squish can snuff the preignition. Will increase compression and decrease preignition. If not overdone.
This assumes a, "zero deck", on a stock head.
Other heads have squish but the relation with the head and piston have to be considered.
This assumes a, "zero deck", on a stock head.
Other heads have squish but the relation with the head and piston have to be considered.
Thread Starter
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Tourer
Joined: Jul 2006
Posts: 310
Likes: 23
From: Sykesville, MD
Thanks for the lesson. I still think that I will run the sea foam once or twice per season and reroute the breather tubes. Anybody have any pictures or designs for the breather tube project. I have seen a few, but none of them were very pretty.
HDF Community Team
Joined: Jun 2006
Posts: 12,779
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From: san antonio
Block off the breather hole passages in the back of the backing plate; you can do this by tapping the holes with a pipe tape; 1/8" or 1/4", I forget and screw in some teflon taped brass plug fittings.
Attach some fuel line hose to each of the breather fittings between the head and the air cleaner mount and connect them to a "T" fitting behind the air cleaner. Connect a small paper filter to the stem of the "T" fitting and your done. You may have to search the auto parts stores for a filter that will work but they are out there. All is hidden behind the air cleaner. The only thing visible on both my bikes is the paper collection filter that is hanging just below the football cover. Have had the setup on one bike for 15K miles and the other for about 5K miles and have never replaced a filter.
I am traveling but I can take/post a photo later in the week when I return home. the photo with rbabos's post shows a similar setup. he is more creative than me and has used braided hose and has routed his to somewhere under the bike instead of a collection filter.
Attach some fuel line hose to each of the breather fittings between the head and the air cleaner mount and connect them to a "T" fitting behind the air cleaner. Connect a small paper filter to the stem of the "T" fitting and your done. You may have to search the auto parts stores for a filter that will work but they are out there. All is hidden behind the air cleaner. The only thing visible on both my bikes is the paper collection filter that is hanging just below the football cover. Have had the setup on one bike for 15K miles and the other for about 5K miles and have never replaced a filter.
I am traveling but I can take/post a photo later in the week when I return home. the photo with rbabos's post shows a similar setup. he is more creative than me and has used braided hose and has routed his to somewhere under the bike instead of a collection filter.
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