Web Cam

I have a Web Cam 12 for my 850 MK3, the original failed, has anyone fitted this cam, if so did you use the standard type followers, what is your opinion on performance. It is supposed to be a mild step up from the original........Thanks......

manx850 said:

I have a Web Cam 12 for my 850 MK3, the original failed, has anyone fitted this cam, if so did you use the standard type followers, what is your opinion on performance. It is supposed to be a mild step up from the original........Thanks......

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I use a lot of Webcam # 12 grind cams [new number #312]

It is very close to stock duration with slightly wider lobe centers and a little more than stock lift.

It will make the idle quality better and easier to tune. It will also make a small increase in power throughout the stock rpm range. It is my favorite cam for near stock rebuilds. I would recommend using it with flat lifters. Jim

Dang it, for a minute I thought I could fire up the computer and watch you work on your bike.

But then you meant cam and not camera... :?

swooshdave said:

Dang it, for a minute I thought I could fire up the computer and watch you work on your bike.

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Me too, I thought how novel....

Thanks for the info Jim, I also sent you a note regarding some porting work on a RH10 head, don' t know if you received it or not. So I would just use a set of standard lifters......John

I think it's darn close to a JS1. It's a darn good compromise for Hot Street Machines

manx850 said:

I have a Web Cam 12 for my 850 MK3, the original failed, has anyone fitted this cam, if so did you use the standard type followers, what is your opinion on performance. It is supposed to be a mild step up from the original........Thanks......

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.040+ pistons, #312 Web Cam (with OEM followers) 21 tooth front sprocket re-jet the 1-Mikuni made 'Pa', my trusty Norton the greatest thing ever.
The cam & sprocket combo recommended by milfordite was the ticket.
I can run the Norton harder and faster now and it likes it even better.
Ride On
Dave
(side story to the cam; the wife/bookkeeper saw the credit card bill from "Web Cam" and gave me the third degree about what it was. I just said it was legit and pay it. She demanded a clarification so I showed her the invoice and packing slip. She thought it was a bogus bill from a porn site.)

pete.v said:

I think it's darn close to a JS1. It's a darn good compromise for Hot Street Machines

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A JS1 is close to a webcam 12A grind but made for Triumph lifters. Quite a bit hotter. Jim

manx850 said:

Thanks for the info Jim, I also sent you a note regarding some porting work on a RH10 head, don' t know if you received it or not. So I would just use a set of standard lifters......John

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Yes, just standard lifters. Jim

comnoz said:

manx850 said:

Thanks for the info Jim, I also sent you a note regarding some porting work on a RH10 head, don' t know if you received it or not. So I would just use a set of standard lifters......John

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Yes, just standard lifters. Jim

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I had the 'face' of my standard lifters dressed by my machinist so they were flat and smooth.
Ride On
Dave

The Buckeye Rider said:

(side story to the cam; the wife/bookkeeper saw the credit card bill from "Web Cam" and gave me the third degree about what it was. I just said it was legit and pay it. She demanded a clarification so I showed her the invoice and packing slip. She thought it was a bogus bill from a porn site.)

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Good to know she's more concerned with your porn addiction than the motorcycle one. :mrgreen:

Jim, When fitting that Cam is there anything different regarding the timing etc, I know the clearances are .006 inlet & exhaust, thanks in advance....John

manx850 said:

Jim, When fitting that Cam is there anything different regarding the timing etc, I know the clearances are .006 inlet & exhaust, thanks in advance....John

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Not really. If you install it using the factory timing marks it should be pretty close to correct. Good enough for most streetbike installations. Webcam has usually been pretty good at getting their lobes in the right place.

Of course any cam should be dialed in using a degree wheel and dial indicators if you are after maximum performance. But then you would need to know what setting is going to give maximum performance in your engine and about the only way to find that is with a dyno.

What I usually recommend if you want to spend some time playing with it is to re-mesh the timing gears and chain to give a couple degrees of advance and try it. If you like it you can try it with 5 degrees advance and see if it's even better. A lot of engines do run better with a little camshaft advance. The camshaft timing needs to be matched to the particular exhaust system in use. Matching the exhaust valve closing to the returning wave in the exhaust system can make a little bump in the power over a short range of RPM. Jim

Thanks Jim, your knowledge is much appreciated, I might raise the compression to 9-1 while I am at it.............