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View Full Version : Cam timing?


F-16Guy
11-19-2002, 04:04 PM
I'm about to put my motor together (416 Wiseco, 11:1, stage 1 Hotcam). Has anyone noticed any problems, as far as valve timing is concerned, with running thinner gaskets, or no base gasket (Honda Bond instead)?? If so, does anyone know where I can get an adjustable cam gear? I know lowering the cylinder (to get the right deck height/chamber volume) will retard valve timing, but will it be so much that I notice a power loss?
joeroadking
11-19-2002, 06:14 PM
I have have the same ? I am installing a 440 kit and decked my cylinder .03 and will be running cometic gaskets but am worried about came timing, thought I read somewhere that it was not enough to be a issue anyone? I know you can slot the gear but is any one making one that can be adjusted
F-16Guy
11-19-2002, 07:26 PM
I can't believe no one offers an adjustable gear. Hey, that could be my ticket to financial independance... now I just need a machine shop and $100k in capital. ....Anyone???
joeroadking
11-19-2002, 07:30 PM
thats a good idea f-16 lets get together and design and market it!we will take stock ones slot them and sell them for $125.00 each,core charge of 75.00 of course
F-16Guy
11-19-2002, 07:34 PM
The funny thing is, you know they would sell like hot cakes, and probably only 1% of the people who bought 'em would know how to use 'em! lol
DISHO1
11-20-2002, 08:29 PM
XR's only sells an adjustable cam gear for the xr400 but since it is almost the same motor as the 400ex you can still use it on the ex.
F-16Guy
11-20-2002, 08:36 PM
Good info, DISHO1, I'll look into it. Well, there goes my million-dollar idea!!
shaneb
11-23-2002, 07:46 PM
I have a 440 with no base and the cam was right at 107 where it should be ....

Just get a degree wheel and check it ....

Shane
MIKE400EX
03-05-2005, 03:15 PM
It doesn't make too much of a difference. But if you're looking for a little edge, perfection, or want to bump the power band up or down a little then you don't have a choice. Just slot the stock one in a miller to make two arcs and you'll be all set. Reducing the total height by .030" retards the timing about 2.5 degrees at the crank. It would be a good idea to check the piston to valve clearance if you move the cam much.
cals400ex
03-05-2005, 03:59 PM
i run a thin cosmetic head gasket and no base gasket with hondabond. i have a 11:1 ross 426 piston. GT Thunder does sell the timing sprocket your looking for.
j753301
03-05-2005, 04:24 PM
here's one

http://www.gtthunder.com/400ex.html
K_Fulk
03-05-2005, 08:05 PM
http://www.webcamshafts.com/other.html

Web cam has this kit for degreeing cams. And have a video to show you how to do it.

If you look on there site they alsohave directions on how to do it too.
chad502ex
03-06-2005, 06:13 AM
Falicon Falicon Flaicon

:macho


http://www.faliconcranks.com/sprocket.htm