Who actually uses the Comp Cams 975 springs?

[Silvermk2]

So how do you fit these springs that are supposed to be a direct fit into the stock spring seats? They are about .040" bigger diameter than stock and nowhere close to fitting. I guess I'm not going be using the new cams anytime soon :cry:

 

[IJ.]

Pretty sure Quickstrike uses em so it's doable.

 

[jdub]

TheKnifeArtist also just installed a set...they are tight, but will fit.

 

[slow supra]

All you have to do is sqeeze lower spring coil into lower spring seat with pliers

 

[IJ.]

All you have to do is sqeeze lower spring coil into lower spring seat with pliers

If you mark the spring at all it WILL fail at the scratch/mark.

 

[Doward]

OD on the 975s is .953" - ~24.2 mm That's gotta be a tight fit!

 

[Doward]

If you mark the spring at all it WILL fail at the scratch/mark.

Yep. Grab a metal coat hanger, scratch it, and then bend it back and forth (like a valve opening and closing)

Bad times

 

[quake]

why not machine the opening a small amount like the v-8 guys

 

[Doward]

You mean the lifter bore? We'd have to have larger than 28mm lifters to do that...

 

[suprarich]

I installed 2 or 3 sets in the last month into 7m heads, they are tight like everyone says but will fit. A little harder to get the retainer down also since they are a touch taller unsprung. Heed Downward and IJ's warning about scratching the spring, wrap your pliers with rubber or use soft brass pliers.

 

[spoolint78]

i'm using them.
well see if they hold up to 7000rpm

 

[bigaaron]

I have a set I didn't use I'll sell for $40 if anyone is interested. I bought two sets of springs but ended up using the BC springs because I already had his valves and retainers.

 

[Poodles]

got em in mine, and yeah, thank god I let the machine shop install, em, they're a LOT longer unsprung than stock springs...