Camshaft core shift

[threewood]

All the lifter turn, no tight bores. I'm going to go with it, we'll see but I'm good with it. Here is the cleaned up lobe.

Cam is lubed, lifters are oiled, timing gear is on and lubed. I put the valley pan in place to keep dust out. And here is a pic of the cam card if anyone is interested. Old cam was a Hughes STL-3842, which I was running prior to the head porting. I liked it, and I can run the same springs. This one has more duration which hopefully raises the power band a bit. I'm also looking into getting 3.76:1 rear gears (about the best I can do with the current 741 rear).

 

[BSB67]

Those lash numbers seem odd to me.

 

[threewood]

Those lash numbers seem odd to me.

Those are the same numbers as the cam I replaced. In the instructions it specifically states aluminum heads , cold lash should be .006"/.004" tighter than hot lash. What do you think?

 

[padam]

Those are the same numbers as the cam I replaced. In the instructions it specifically states aluminum heads , cold lash should be .006"/.004" tighter than hot lash. What do you think?

Should be another zero to the right of the decimal place.

 

[threewood]

Those lash numbers seem odd to me.

Should be another zero to the right of the decimal place.

Christ Almighty, they misprinted the cam card!! I hope the rest of the numbers are correct. I hope those guys see this thread and fix their business. From their website....

 

[padam]

Sh&$ world we live in. My Comp card is misprinted as well.

 

[Dodge Bros]

I don’t see any reason why grinding the lobe straight and making sure the lifters doesn’t hit the other lobe next to it won’t work when it is just one lobe.

The cam I had was shifted left to right was from Crower, it had nearly .030” core shift left to right, but instead of one lobe, it was all the lobes. Whenever the lifter moved from one half the core to the next (from the die casting being offset) the cams taper caused a violent drop, or coming back around on the next side the lifter jumped up. You could watch it happen on the dial indicator as the engine was rotated.

All the cast cam cores made here in the US are from CWC, then semi finished at either CMC or EPC. I think Howard’s gets the cores from CMC, Comp gets there cores from EPC. There are some differences in the cores, EPC and CMC have a little different specs. Mechanical cams are usually on better cores than a hydrualic cam. I think Crower uses EPC like compcams. Mike Jones at Jones cams mentioned some off shore cores have the CWC logo and something like 30% failure rate. I have also seen Comp sell what looked like could be a knock off CWC core. Either that or it is from a very fresh core die. The CWC letters are crisp and different, if the CWC letter on the cam looks like this, beware. I think it may have came from offshore like Jones mentioned. I have never seen a cam fail on a break in as spectacularly as that cam did. Normally you can barely read the CWC because the die has been used thousands of times. You can see these letters in the photo look fresh. Beware if the CWC logo looks like this one.

 

[threewood]

I don’t see any reason why grinding the lobe straight and making sure the lifters doesn’t hit the other lobe next to it won’t work when it is just one lobe.

On the rest of the lobes, there were visible grind marks where they were cleaned up at the seams. This one was missed. Bad quality. I hope the quality of the steel is good.

 

[dvw]

Those are the same numbers as the cam I replaced. In the instructions it specifically states aluminum heads , cold lash should be .006"/.004" tighter than hot lash. What do you think?

I agree 100%. Thos numbers are close. Check a few on one bank hot after a good hard run. No need to check them all. They will start to cool and change faster than you can check all of them. Then check the same valves you checked cold the next day. Do the math from hot to cold. Now you know.
Doug

 

[T Brashears]

I used a Hughes cam in a T/A motor several years ago,was quite pleased with it.Id expect better from them. I would also have sent it back. Having to fix top dollar parts is worse than checking and bagging your own groceries.lm using Hughes rocker assy on my 383,3k miles and happy.
Mr.Six Pack cam ground by Engle,Johnson lifters. One lifter wanted to bleed down overnight and still tick hot,
I called Johnson and had a new lifter 3 days later. I get crap parts at work way too often anymore.
I would have been on the phone for a call tag.

 

[T Brashears]

What size is that engine. I’m building a low deck 499? Over the winter ,my thought is a Hughes solid like that,let us know how it goes.

 

[RJRENTON]

Are you a METALLURGIST?

Looks like any flat tappet cam , Ive ever installed numerous times over the years!

A metallurgist (chemistry or recipe) deals with the chemistry of the material based on a percentage of carbon, iron, moly, tin, chrome, etc of the alloy.....be it a forging or casting....but not manufacture of the , in this instance, the cams core, before machining and grinding and perhaps hardening. Just my opinion.........
BOB RENTON

 

[threewood]

What size is that engine. I’m building a low deck 499? Over the winter ,my thought is a Hughes solid like that,let us know how it goes.

446ci. Cam is broke in, inner springs are back in, everything lashed. Ran it around on the back roads up to 5k and no issues. It sounds good and has a nice choppy idle.

I am running Hughes rockers and SMITH Bros pushrod. The cam I replaced was a Hughes and I was happy with it.

 

[threewood]

I used a Hughes cam in a T/A motor several years ago,was quite pleased with it.Id expect better from them. I would also have sent it back. Having to fix top dollar parts is worse than checking and bagging your own groceries.lm using Hughes rocker assy on my 383,3k miles and happy.
Mr.Six Pack cam ground by Engle,Johnson lifters. One lifter wanted to bleed down overnight and still tick hot,
I called Johnson and had a new lifter 3 days later. I get crap parts at work way too often anymore.
I would have been on the phone for a call tag.

I have been dealing with crap parts the entire time building my car. It sucks and is a time and money waster. I chose to fix what I had, but I will drop a line to Hughes letting them know the issue. On their website they say emails will be answered in up to 3 months!!! Some service.

 

[threewood]

Exhaust note from the new cam through 3" pipes and Dynomax Ultraflow mufflers. My timing is currently set at 21°/37°

 

[Cranky]

I have been dealing with crap parts the entire time building my car. It sucks and is a time and money waster. I chose to fix what I had, but I will drop a line to Hughes letting them know the issue. On their website they say emails will be answered in up to 3 months!!! Some service.

Or their email backlog is humongous! My dealings with Hughes wasn't very exciting even years ago. Talking to idiot tech people and shipping the wrong stuff was just two of the problems.