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Windsor cam timing, whats the limit of advance? 

 

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 Post subject: Windsor cam timing, whats the limit of advance?
Posted: Sat Dec 03, 2005 12:46 am 
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Howdy all, I am just in the process of degreeing in a new cam into my XR8 & can't get a closer spot than 2 1/2 degrees advanced or 3 degrees retarded, the cam is meant to have -27 degrees BTDC @ .050'' but because of the geardrive I am using I can only get 30 deg or 24.5 deg BTDC, has anyone experimented with the results of advance/retarding cams in a 302w. I feel that it would be safer to advance it, but I have only played with clevo's in this dept.
any advice from experience would be much appreciated
cheers kenny
here's a shot of my newly ported inlet port.

 

 

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Posted: Sat Dec 03, 2005 1:05 am 
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Is it an option to have a new key way ground into the cam gear? Or whatever it is that they use? The alternative would be to swap them for some vernier gears that are fully adjustable?

 

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Posted: Sat Dec 03, 2005 1:13 am 
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they have multi ofset dowels, but it appears that they are only in 6 degree inciments, I will experiment a bit more 2morro with moving a tooth & backing up with the dowels.
but from experience 2-3 deg advanced wasn't the end of the world, only retarding it gave me grief

 

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Posted: Sat Dec 03, 2005 1:45 am 
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+/- 4 degrees should be fine, any more and you may run into issues though. 4 degrees will move the powerband by about 200rpm, advancing it will obviously improve low end power and probably help idle out a bit too.
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Posted: Sat Dec 03, 2005 12:47 pm 
Getting Side Ways
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well, got it in at 1/2 degree advanced by advancing it a tooth and retarding it 6 degrees, so hopefully I might be able to hit 300hp at the treads this time around still using E7 heads ,as I am not gonna use the vic Jr heads on this combo, yet!
cheers kenny

 

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