Pulled the trigger..
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Joined: Feb 2008
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From: Passaic County, NJ
The 4* advance kind of mimmicks a slightly higher compression...closer to 9.8:1. The TW6 likes 10.2:1 as it's sweet spot.
Some people use the 4* advance in lieu of milling the heads as a temp fix.
Stock, the 96" is ~9.5:1 compression in reality. You could also use a .030 head gasket and gain about .25-.3 in compression. I did not go that route.
Some people use the 4* advance in lieu of milling the heads as a temp fix.
Stock, the 96" is ~9.5:1 compression in reality. You could also use a .030 head gasket and gain about .25-.3 in compression. I did not go that route.
Club Member
Joined: Feb 2008
Posts: 11,483
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From: Passaic County, NJ
Is Bob making a combo cam? I haven't seen any sort of tw6-408 cam offered on his site.
Last edited by SC-Longhair; May 26, 2010 at 09:39 PM.
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Tourer
Joined: Aug 2008
Posts: 438
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From: Kamloops BC
The 4* advance kind of mimmicks a slightly higher compression...closer to 9.8:1. The TW6 likes 10.2:1 as it's sweet spot.
Some people use the 4* advance in lieu of milling the heads as a temp fix.
Stock, the 96" is ~9.5:1 compression in reality. You could also use a .030 head gasket and gain about .25-.3 in compression. I did not go that route.
Some people use the 4* advance in lieu of milling the heads as a temp fix.
Stock, the 96" is ~9.5:1 compression in reality. You could also use a .030 head gasket and gain about .25-.3 in compression. I did not go that route.
Outstanding HDF Member
Joined: May 2008
Posts: 2,166
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From: la
You don't need the advance. On my 96" the .030 head gasket gave me .25:1 more compression, the 4*advance would have been .14:1 more, it's just a small bump but that's all I was looking for.
Last edited by paul s; May 27, 2010 at 01:21 PM.
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Tourer
Joined: Aug 2008
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From: Kamloops BC
Think I'll go with just cams, possibly gear route if I can get one shipped with my cams. If I'm going to pull the heads to add thinner base gasket I may as well have em ported lol. Unfortunately the budget won't allow that just yet.
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Tourer
Joined: Aug 2008
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From: Kamloops BC
Ya that's one reason why I want to leave the heads on, just one more thing I can talk myself into spending money on lol. Ah well, I only have to ride it this way til winter when the "Big-Bore Bunny" comes to visit 
THEN the heads etc will be done and can put the proper package together.
THEN the heads etc will be done and can put the proper package together.
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Joined: Apr 2007
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From: Seattle, WA
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Joined: Feb 2008
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From: Passaic County, NJ
Right, installing the advance gear is an option not a necessity.
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