cooter05

I will be installing Comp Cam stage II cams this week, has anyone had issues with valve clearance?

school boy

the 270's?

cooter05

yeah the 270's with the upgraded valve springs.

mrtstang

Back when I did cams on my 04 gt I did a TON of research in that area. Bottom line....it's very much hit or miss with those cams if you keep the stock intake valves. You really are better off with other options IMO. I went with MHS stage 2's, had acceptable clearance, and was very happy

school boy

youre better off doing this. if the 270's are degreed in right, there will be valve contact. you can retard the cams and get by but you will leaving hp on the table. i would either get the comp 262's, the cams mentioned above or some like them

cooter05

I'm not sayin anyone is wrong but I have done alot of reading from other guys who have done this mod, and i'm told that with the new beehive comp springs, and the cams degree'd right the shouldnt be a problem. but since ford used different piston's through the years it's a good question. But if you turn the crank you should be able to feel if there is any issues. thanks guys for your input I appreciate it!!

mrtstang

Well just because you turn the crank and don't have contact doesn't mean that you wont under load or high rpm for instance. That's why there is such a thing as "acceptable clearance"

So what is degreed right lol? I mean sure you can retard the ICL a little to create more clearance, but you lose power then, so then why even go with that grind at all IMO. I'm just offering some insight based on my many personal hours of research and actual experience

school boy

this clearance he's talking about is about .020-.030 of an inch. btw i have the comp 270's. after using upgraded valves (added .080 of clearance) and notching my pistons .050, i was still only getting about .055 of clearance. without notching my pistons, i would have cleared them while i rotated the crank but more than likely would have had contact on high rpm. i did degree the cams in at 106-107 icl. i could have gotten the clearance without any mods if i degreed in at 111 icl but would have lost power.
do yourself a favor and do it right the first time