well get the part number from them take a look at what they suggested
compare other brand springs costs.

The crower 220 series I talked about they show ther recomended spring it has higher spring pressures then most solid flat tappits
open pressure 422 I would have to look it up again believe the closed was 160, its a pro 55 treated cam designed to work with a 1.8 intake rocker.

Please tell me for $177.00 your cam motion cam has the pro 55 treatment ?

 

I spent my time looking at comp and crane spring rates. Pretty reasonable 125 on the seat and 325 open. give or take.

What is a pro-55 core, I have seen it mentioned in a few places? Would it be marked on the cam somehow?

OK I found an explanation of it sort of. Its some kind of harder core that is sold at a premium.

SUPPOSEDLY you can find P55 marked between the lobes somewhere. I am working all night tonight so I will check it when I get home circa 6am-ish.

 

I don't know forgot now its not a coating its a process that hardens the cam surface about 10 thousands thick.

I think all the cam companies offer it on there cams.

Surely for the amount you paid it had that done to it.

 

There is supposedly a core even better than the P55, something to do with the last couple of lobes and P55 cams BREAKING.

WTF, a camshaft BREAKING!

i think its labeled K15 or some such thing. Lobe lock or some other such thing.

 

Speaking of high reving engnes, I would love something that sounded like this.

http://www.youtube.com/watch?v=sylOvLMsBJo

 

Man that thing is like a raped ape.

 

Crower shows to have an option of an 8620 steel have not noticed anyone else offer that for a flat tappit cam.

Now Im sure that would be expenive

They also will make the flat tappit with standard cam bearings, standard size with roller bearings. bog block standard size, big block
standard size with roller bearing and the really big 55 mm, all for your little small block. crower seems to be in the serious power business
claims they have more custom cam sales then off the shelf sales.

 

Apparently all the information readily available on cam cores is from the same pissing match between 2 people.

 

Nice car but this guy needs to figure out cram the accelerator to the floor board don't let up.

Its old tech now but if you ever got to drive an M/21 with every other tooth off the syncros and a mr gasket vertical gate shifter. the shifts are lightning fast.

 

Yes it is a pro55 camshaft.

 

The last two runs on that video you can hear the motor bog and it almost stalls on the very last run with those cookie cutter tires, that's a high revving small block sounds great, but wouldn't be any fun on the street. I give up you guys win can't wait to hear about the finished motor in the car

 

When you have a small cube engine in a 3450 camaro with nothing
but a power brake booster for an option, anyway you only have one option for any power. well theres more options today with that simple NOS torque adder

Torques a good thing but at a point its a waste of time on street tires only handle so much and if you want to run around fast on the freeway you can't exactly run around with drag radials.

You can benefit from more upper end power if all you have is so much toque the tires can't handle it anyway.

my old 454 had 3.36 rear gears a 2.20 low gear, int dur 269 .050 flat tappit. could it be at its best on a drag strip no, but I never felt like I was hurting for any torque on the street. The last camaro I bought
a 79 Z/28 ( stickered up car calling it a Z/28 ) it had a real baby cammed 350 2.64 low gear 3.73 rear. my 454 with 269 .050 had more grunt down low with 2.20 3.36s.

 

Probably should not tell this at my older age not going to promote street racing.

I lost my license four times from the age 16 to 23 three yrs total time twice for one yr period twice for 6 month periods and of course the law did not catch me everytime I got away with a lot. The 69 Z/28 got my license for three of the times, the 73 vette one time. The reason I bought my first vette a 72 with L/48 auto 3.08 was an atempt by me to slow me down insurance of course at that age was killing me, had the 72 for about 6 months late one night it would not run but 125 on the freeway that was the end of it the car had to go.

Torque always rules right first time I lost my license for racing the 69 Z/28 it was less then a month old I pulled up beside a brand new 69 Mach one mustang 390, ya I know a 390 was not great but it was torquey engine compaired to a cammed up smaller 302, I wore his him out for more then a half mile he was having to short shift that low rpm hydraulic cam torque crap engine I was pulling much longer in every gear before I needed to shift.

I would catch cars from a roll with considerable more cubes but low rpm operators, at this point they could not use there torque advantage to get the 3400/3600 pound cars rolling all the weight was already rolling.

Heres how bad I was or dumb if you like , my cousin who recently died came over to the house he said he rode with me one night I raced two cars, could not even remember what he was talking about or the cars. After 23 I began to get a little better brain showed up at the track.

 

For me I stopped gratuitous speeding when I had my *** end try to pass the front end at 110 on a highway

 

So I called cammotion about springs. They want $195 bucks for springs. Bugger that.

So 130-140 seat pressure, 340 on the nose.

This appears to be the right spring for me:
http://www.sdparts.com/product/SD100...00MaxLift.aspx

 

Believe if I were going to use a single small dia. spring
I would go with this higher grade H 11 tool steel with
a damper spring for $175.00. Crane, CRN-99846-16

PRO-55 grade cam should handle 383 open pressure.
crowers 220 series they recomend a 160 closed 422 open for
it so the pro 55 must be fairly tough.

CRN-99846-16

H-11 tool steel
spring type single
with a damper
1.255 OD dia.
.0870 in dia.
128 seat at 1.800, 142 seat at 1.750
they will handle 640 lift at 1.800 height
383 open pressure at 1.200
coil bind 1.100
spring rate 428

You may want to consider this thought older design cams like Z/28 cams and many others have a slower opening rate make less power but they are easy on valve springs.

Modern cams with quicker opening rate make more power but they are harder on valve springs. You know the cams with a shorter distance between the .050 and advertised duration.

My guess is this cam motion you bought is no old tech design.
I have no clue what the cam motion springs specs are or what there made of, sounds like they could be using a higher grade spring for good reason.

Guru a single spring breaks you want to talk buggered up engine. valve train death gets more higher rpm engines quicker then any single thing.

 

Damn had spent a long time pooring through spring catalogs and didnt see that one.

I have an ebay auction open for some compcams( ) 26120 springs with retainers.

They will also work appropriately.

 

We use all P-55 cam cores on all our flat tappet builds as they are considered a performance cam core and is a harder cam core they cost about 15 dollars more but it well worth the extra money.

We had 2 engines come in the shop over the summer and they had the standard Crane core which a lot of cam companies use out there and both cam showed alot of wear and one cam only had appox. 500 miles on it

In most cases of breaking a cam is because the valve float or not enough spring, Its some thing we have not seen but have heard of cam breaking!!! ITS NOT VERY COMMON

 

What did cam motion say about there springs did you ask why there spring was $198.00 or did you just assume cam motion is trying to screw me on springs.

It sounds like you stumbled on to a pro 55 grade cam witch is a good thing, valve springs are important if you want some long life out of
your springs and your not just going down a drag stip for awhile then
change springs your building a street car.

Believe I noticed in one of the recent rags they are using some tool
steel in there cam it allowed them to do away some heat treating.
just becuse a spring has the right pressure there are higher grades
of stuff the wire is made out of. coil springs loose tension.
I noticed and they are probably high dollar Lunati is making Pacaloy
behive style springs

The $52.00 hd Z/28 spring to get the little higher pressure the wire is a hair thicker.

The crane springs are made out of tool steel with a damper.

I ran the **** out of my Z/28 it had high duration but only
.485 lift and it had lazy lobes easy on the springs.

your cam has much higher lift more aggresive much harder on the valve springs.

 

They sell Kmotion springs, they are expensive springs. I figured I would check out the market for other good quality springs, before committing to buy.

I am not against buying 200 buck springs, but I am a shop around sort a guy.