L79 Camshaft (GM # 3853151); who makes what

[Gary B.]

[Jack H.]

Re: L79 Camshaft (GM # 3853151); who makes what

Sealed Power / Speed Pro #CS179R.

The L79 cam is hydraulic.

Here is one of many sources:

http://www.northernautoparts.com/part/cs-cs179r

[Gary B.]

Re: L79 Camshaft (GM # 3853151); who makes what

Jack,

Thanks. Is there any what to know if the Sealed Power / Speed Pro cam is 100% made in the USA?

Thanks,

Gary

[Jack H.]

Re: L79 Camshaft (GM # 3853151); who makes what

I suppose you could call the supplier and ask for the country of origin on the packaging. Unfortunately, I highly doubt it will be USA. Not much made in the good ole USA anymore.

[John D.]

Re: L79 Camshaft (GM # 3853151); who makes what

Jack,

Thanks. Is there any what to know if the Sealed Power / Speed Pro cam is 100% made in the USA?

Thanks,

Gary

Gary, The CS 113R '097 solid lifter cam is Made In the USA. AT least it was one year ago when I bought this cam. One might guess athat the '151 cam is.
But I don't know. John

[Gary B.]

Re: L79 Camshaft (GM # 3853151); who makes what

Are Sealed Power and Speed Pro part of Federal Mogul? Just wondering who to call to ask for country of origin.

Gary

[Joe L.]

Re: L79 Camshaft (GM # 3853151); who makes what

Are Sealed Power and Speed Pro part of Federal Mogul? Just wondering who to call to ask for country of origin.

Gary

Gary------


Sealed Power and Speed Pro are Federal-Mogul brands.

For cams, there are two manufacturing considerations: where is the core manufactured and where is the core machined into the finished camshaft?

China is now a source for many castings. So, the camshaft core could well be Chinese but the finished grinding done here in the US. The CWC Division of Textron Industries used to supply most of the camshaft cores for just about all the major cam manufacturers. They even supplied the cores to GM for many SERVICE camshafts. I don't know if they still supply the cores and, if they do, whether they are still US-manufactured.

[Duke W.]

Re: L79 Camshaft (GM # 3853151); who makes what

As long as you buy a part from a Tier I OE supplier like FM or Dana (Clevite), I don't think the country or origin is an issue. Regardless of where parts are made they meet all the current OE quality requirements, and the vintage OE replacment parts are built to the GM prints.

For L-79s I recommend the L-46 camshaft (Sealed Power CS-1095R, Clevite 229-1615) installed four degrees advanced with a Sealed Power C-3023X adjustable roller chain set. Installing this cam four degrees advanced brings the inlet POML back to 110 degrees ATDC (same as the L-79) from the as manufactured 114. The L-46 cam has two degrees more .050" duration and the same LSA as the L-79 cam, so from a practical standpoint it's the same as the L-79 cam except for the later phasing as manufactured.

The reason I prefer the L-46 cam is better lobe dynamics.

If you want "more power" and revs, massage the heads. Use the OE replacement Sealed Power VS-677 springs, and if you set them up at an installed height to provide .090" coil bind clearance at a 1.44:1 rocker ratio lifter pump up speed will be 67-6800 and it will make useable power to at least 6500.

Your '66 should have the second design 327 rods, but I recommend installing better rods like the Eagle SIR5700 on all SHP small blocks. Your OE rods would be a good upgrade to an earlier 250/300 HP 327 with the first design rods or a hydraulic lifter 283.

Duke

[Gary B.]

Re: L79 Camshaft (GM # 3853151); who makes what

As long as you buy a part from a Tier I OE supplier like FM or Dana (Clevite), I don't think the country or origin is an issue. Regardless of where parts are made they meet all the current OE quality requirements, and the vintage OE replacment parts are built to the GM prints. ...
Duke

Duke,

In addition to meeting current OE quality requirements, I'd also like to buy parts that helped to maintain manufacturing jobs in the US.

Thanks for the info on the L-46 cam. I've read your previous posts, and they are part of my library on cam options. Would the L-46 cam give an obvious audio clue when listening to the engine that it wasn't the L79 cam?

Gary

[Duke W.]

Re: L79 Camshaft (GM # 3853151); who makes what

The primary factor affecting idle behavior is valve overlap. Total idle spark advance and exhaust system configuration are also factors, but play a lesser role.

The L-46 cam has two degrees more .050" duration (224 vs. 222), but the same LSA as the L-79 cam, so effective overlap is essentially the same, and they will both idle the same and be indistinguishable from each other, all other things equal.

Some L-79 owners have chosen the LT-1 cam. Its idle behavior is distinguishable by an experienced ear from the L-79 and L-46 cams (12" @ 900 vs. 14" @ 750) due to greater overlap, but if the valve clearance is to my recommendations, most won't be aware that it's a mechanical lifter cam.

All other things equal the LT-1 cam makes about the same top end power as the L-46 cam at OE 114 degree ATDC indexing, but the LT-1 cam extends the power sweet spot and useable revs to about 7200 with properly set up VS-677 springs.

Duke

[Gary B.]

Re: L79 Camshaft (GM # 3853151); who makes what

Thanks Duke.

The 7200 limit of he LT-1 cam is in excess of my needs.

Gary

[Gary B.]

Re: L79 Camshaft (GM # 3853151); who makes what

...
For L-79s I recommend the L-46 camshaft (Sealed Power CS-1095R, Clevite 229-1615) installed four degrees advanced with a Sealed Power C-3023X adjustable roller chain set.

Duke,

Is the vendor and number (Sealed Power C-3023X) correct for the adjustable roller timing chain set? I think C-3023X is a Cloyes number. Is Cloyes the same as Sealed Power?

Gary

[Duke W.]

Re: L79 Camshaft (GM # 3853151); who makes what

The C-3023X is the part number I got from napaonline.com, and I think it's a Sealed Power number.

I suspect that Cloyes may make this chain along with the C-3023K non-adjustabale truck chain and the C-3025 silent chain. I would think Cloyes would use different part numbers, but maybe not.

It's not uncommon for one manufacturer to supply low volume parts to other manufacturers' brands - same part in a different box.

The number I have for the Cloyes larger roller chain - the one that most people call a "Cloyes" and costs about 90 bucks is 9-3100.

In any event, whether you purchase an OE equivalent Sealed Power or Cloyes adjustable truck roller chain, it shouldn't cost more than about 25 bucks for the set.

BTW, the seventies vintage Chevrolet Power Manuals recommended the early wide silent chain or truck roller chain. I used the early wide silent chain - what was OE on my 327/340, but this set is no longer available from any source that I know of. That's why I recommend the truck roller chain now. It's a high quality OE equivalent part that is readily available and inexpensive, and it's available in both a non-adjustable and a three-way adjustable version at about the same price.

If guys follow my recommendations I can usually save them at least the price of a new set of Eagle SIR5700 rods in parts cost on rebuilds because many parts like inlet valves, pushrods, rockers, retainers, locks, oil pump, etc can be reused if they pass simple visual inspections/measurements, and parts that need to be replaced (other than the conn. rods) do not need to be more than OE equivalent quality. Hot rod parts are usually much more expensive.

I also recommend that guys research and write down a list of all parts (brand and part number) that may need replacement, and this will usually include camshaft, bearings, exhaust valves, valve springs, pistons, rings, and timing set. Also they should understand the various valve guide rebuilding technologies and pick what they think is best. Doing this work up front, which is really not that much effort brackets your parts costs and allows you to properly manage the vendors you hire whether it is just machining, or complete from teardown to assembly.

Duke

[Gary B.]

Re: L79 Camshaft (GM # 3853151); who makes what

Duke,

Hmmm... The Cloyes C-3023X as described on the Summit Racing website (http://www.summitracing.com/parts/cl...make/chevrolet) has a price of $18.97, but it looks to me like it's non-adjustable.

Gary

[Jack H.]

Re: L79 Camshaft (GM # 3853151); who makes what

Duke,

Hmmm... The Cloyes C-3023X as described on the Summit Racing website (http://www.summitracing.com/parts/cl...make/chevrolet) has a price of $18.97, but it looks to me like it's non-adjustable.

Gary

The 3 different key-ways on the crank gear/sprocket are what provide the adjustment.

More information from the Cloyes website:

Q. Explain the 3 different keyways on the crank sprocket?
Answer: The Cloyes
By changing the cam timing, enhancements to the camshaft characteristics can be achieved. For example, retarding the cam timing will increase high RPM horsepower, and advancing the cam timing will increase low-end torque.