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View Full Version : please read this!! can i run bigger cam??


hippy440
03-14-2003, 05:47 PM
back when every body was saying the weisco 440 11:1 piston didn't really make that much comp. i took some advice from this forum and installed a 440 big bore kit and milled the cylinder 30 thousanths like some people said i needed to do to get 11:1 comp. i also installed the thinest cylinder and base gaskets cometic had!! i also put in an xr400 cam!! but this cam is WAY TO LAME for me on top end!!! so, do you think i can go with a bigger cam with out having the valves smack the piston?????????????????????????:confused: :confused: :ermm:
Steve-o 400EX
03-15-2003, 03:44 AM
If your not looking to redo the rockers and valvesprings, i say go for a hotcams stage 2. I think they are made by honda so you dont need springs or hardened rockers.;)
4TraxRider
03-15-2003, 08:55 AM
I second that.
RAPTORAZ
03-15-2003, 09:05 AM
When you initially built the engine did you check the piston to valve clearance then? If you did, just subtract the lift difference between your present cam and whatever cam you plan on using. If not, you might want to pull the head and check the clearance with your new cam.
RED121572
03-15-2003, 10:47 AM
Honda makes "Hotcams"??

...I learn something everyday.
JD400exrider
03-15-2003, 02:01 PM
Honda does not make hot cams
hippy440
03-15-2003, 03:42 PM
no i didn't check the clearance when i built it because i was pretty sure the xr cam wasn't big enough to worry about. so do you guy's "think" i'll be alright with the stage two???? :(
bmw500hp
03-15-2003, 04:36 PM
The parent company that makes "hotcams" is Pivot Works. Honda makes the xr400 cam or the HRC cam.
RED121572
03-15-2003, 05:01 PM
Heres my two cts from my experience...

If ya get a bigger cam, harden your rockers. I just have a little ole WB's all around cam and its doing a number on my rockers. (cam has been in there for almost a year)
lilpoppy
03-16-2003, 05:55 AM
I remember someone saying that Hotcams were having problems. Have they taken care of the problem yet? We just tore my friends apart today and we were originally thinking of using hotcams stage 2 but is it safe or should we get something else?
Steve-o 400EX
03-16-2003, 10:29 AM
From what I am told, the problem is fixed. I plan on running it in april when i do my 416. Just make sure the flange has to be pressed on, if you can put it on by hand then there is something wrong. Thats the problem they had.
hippy440
03-16-2003, 02:12 PM
come on people answer my question... please!!!!!!!!!!!
Steve-o 400EX
03-18-2003, 04:37 AM
Yea, you should be fine with a stage 2, just make sure that ur rockers are in good shape, if they are worn then it will not perform well and could damage the cam.
crashinmatt
03-19-2003, 12:16 PM
to be sure and to be the safest u should check ur clearances, but without knowin the clearances, goin bigger my be scary. red121572 i have a wb track cam on my stock rockers without hardenin them, and had it in there for about a year with no problems. when i took the valve cover off a month ago there wear zero signs of wear. i dont know what happened to urs.
Steven
03-19-2003, 02:38 PM
Hippy440,

If you did install the thinest cometic head gasket (.025) then you can get youself some more clearance by running a cometic .040 head gasket.

If you installed the thinest base gasket cometic makes (.012) then you can get thier .020.

Between the two, you should be able to get another .025 clearance if there are issues so don't fret!

What concerns me is that you milled off .030 AND ran the thinest gaskets.

If I remember, my wiseco 89mm sat about .040 in the hole with the .020 base gasket. If you used the .012 base which crushes to .010 and milled off .030 than you should be about zero deck... which is great. BUT you are also running the .025 head right? That gives you .025 quench and would make your compression ratio WAY over 11:1.

.040 quench is better. Just get cometics .040 head gasket and that should bring you down to the desired 11:1 compression and the proper clearance so you can run a hotter cam and a cooler engine.

I say get the hotcam stage2. It rips and is designed with metal that matches the hardness of your OEM rockers. Many aftermarket cams are regrinds and are made of very hard metal, hence hardened rockers a a must.

Hotcams are quality, just make sure it takes 500 or more pounds to press on the flange. If the flange just slips on than you got one of the "bad" cams. Hotcams will replace it.

Good luck-Steve