It occurred to me today that those of you adding the CPS pad to the HO and LO intake camshafts may be throwing them out of balance...
A while ago I was discussing cam options with my uncle who is an old hot rod guy. I was laying out clearance between a HO intake cam and a stock 2.4 cam tower
and was thinking about taking material off of the camshaft instead of the cam tower but he said that camshafts are balanced pieces, therefore it should
not be accomplished that way.
Those of you that have had the CPS pad adding to any intake camshaft, did you (try to) balance the cam or just throw it in?
The reason I would like a discussion on this topic is: I think by simply removing a small amount of material from key places on the HO camshafts I can
make them fit into both 2.4 cam towers without even upgrading from the 33mm lifters to the 35mm ones...
I wanted this to be a secret of sorts until I got mine running (or failed), but considering the wealth of knowledge and expertise
available on these forums, I couldn't resist! I'm also well aware of the need for the hex drive and the oil passage in the end of the
HO intake cam, as well as the stiffer valve spring set (2.3 springs and retainers) recommended to run the HO cams, so please keep comments aimed at those topics
to a minimum...
ZZZZZZZ
You think like me, i had that idea also because i didnt want to take the towers to get get boreout, but then i was like - i have to run the 2.3 springs and didnt know if the spring fit the lifters on the stock 2.4.....ect ect alot of things came to mind and i just never got around to do it.
I'm not sure that camshafts ARE balanced... And at the very least, I don't see how removing material from the journals would affect the balance, as you'd be removing an equal amount on every journal and the journals are concentric to the center of the shaft, if I'm understanding what you're proposing correctly.
Arrival Blue 04 LS Sport
Eco
Turbo
Megasquirt
'Nuff said
I think you could run HO cams in the stock tower with the stock bore. You dont have to clearance the tower a whole lot for the cams to spin freely. The only problem would be running bigger springs (They arent really needed) and if any wear would happen because of using the smaller lifters.
With that being said, i would still mod the towers for the larger lifters because...
1. Once you have the ability to run bigger than ho cams, you will want to lol
2. Why try and use something that might not work.
3. Any bigger of a cam you will need better valve springs and the stock lifters will hinder those options.
SCARAB- What I propose is to take material from the part of the lobe that contacts the housing and get the real problem at its source...
jmarks82- Running bigger cams later is an excellent point, but that's a bridge I will cross when I come to it. I have a built 086 head sitting around waiting until I pull together the cash to build a whole motor at once... I'm in this project currently because I blew a head gasket and wanted to have some fun putting it all back together. I'm using a spare LD9 head with mild port work, HO cams, LO intake manifold, 56mm TB and 4-1 header, so bigger cams really wouldn't even fit the current build.
Thanks for the input guys! I will let you know how it turns out!
ZZZZZZZ
while your at it take some pics and make a HO cam sticky...it would be much appreciated from my seat!
id get me some HO cams if i knew exactly what needed to be done.
im not lazy i just wouln't want to faulk something up with my car because it runs great.
