Inliners International Forums General Discussion Hi Performance J. C. Whitney RV cam for 292

Several years ago, perhaps more, the subject cam was recommended. There weren't any spec.s on it, but several thought it was a good mild cam. I purchased one and finally got around to installing it. It didn't come with a cam card and couldn't locate the spec.s from the Elgin part number that was on the box. I degreed it today, this is the first cam I've degreed, so if there is an error let me know please. I took all the measurements at .050. The cam was with in a degree of the markings on the damper. The measurements a .050 lift are intake, 140 degrees on the rise, 345 degrees on the descent, max lift .265 (.4558 with 1.72 rockers). The exhaust at .050 is 5 degrees rise, and 200 degrees on descent, max lift .255 (.4386 with 1.72 rockers).

Larry

It sounds like an intake duration of 345-140=205 degrees and
exhaust duration of 200-5=195 degrees (or is it 200+5=205 degrees??)

205/195 would be rare, kinda like a turbo cam with less exhaust than intake duration
205/205 would make more sense, a little hotter than the stock 292 cam which is about 188/188 at .050" I think.

What is the relation between your degrees and TDC? That is, is 0=360=TDC degrees?
Is 180=BDC?
(It doesnt sound like it but what then is the relation?)

When you measure lobe lift with a micrometer do you get the same numbers?

I just cant find this cam either in JC Whitney or other - what year did you buy it from Whitney?

One more thought, are you sure you didnt mix up intake & exhaust?
If you did that would mean it's really
195/205 in/ex duration

That would also make your "degrees" jive with TDC and I'd then get a 110 LSA with the cam ground/installed 7.5 degrees advanced.

From the lift though I still cant figure the exact cam but it would be a great street/RV cam even for a stock converter, 3.08 gear, etc.

I found this cam on the online NAPA page. I believe this is the stock or real close to the stock 188/188 cam.
NAPA part number

They use to sell this 194/204 cam that I believe may be the same cam Whitney had. I scanned this from a printout I had fortunately saved..


Item#: CEP2291876
Price: $119.00
tax and shipping not included
Disclaimer: The stated price may vary from the in store price and may change at anytime.
usually ships within 3-5 days.
Attributes:
Advertised Duration (Exhaust):270 Deg Advertised Duration (Intake):260 Deg
Cam Lift (Exhaust):.280"
Cam Lift (Intake):.26S"
Cam Timing at.O5O" lobe lift (Exhaust Close):13 Deg BTC
Cam Timing at .050" lobe lift (Exhaust Open):37 Deg BBC
Carn Timing at J)5O" lobe lift (Intake Close):22 Deg ABC
Cam Timing at .050" lobe lift (Intake Open):8 DegATC
Degrees Overlap:45 Deg
Duration at .050" lobe lift (Exhaust):204 Deg Duration at .050" lobe lift (lntake):194 Deg lobe Centerline (Exhaust):11S Deg
lobe Centerline (Intake):1O5 Deg
Valve lash (Exhaust):Hyd.
Valve lash (Intake):Hyd.
Valve lift (Exhaust):.490"
Valve Lift (Intake):.464"

I agree with DeuceCoupe that your rise and descent notation is a little hard to interpret.
When I dropped the engine with this cam back in my '67 3/4 GMC, I changed the 4.56 gears for 3.54 and it seemed to wake up and pull harder. Pulls strongest from 1500 to 2800.

Deuce you're right on I mixed up int and exh. I put a stop in #1 and checked the marking on the damper, it was within a degree or two. I put zero on the degree wheel at TDC. The degree wheel I used will be replaced next time. The degree wheel is less than the damper diameter. The lifters haven't been pumped up yet, so I tightened the rockers down snug no slop. I didn't think to measure the lobes before I put it in.

This going in a 63 3/4 ton with 4.10 posi and a A833 tranny. I'll probably pull this cam after the engine is broke in and I have a "feel" for how it performs. I'm going to clean up the HEI this afternoon and hopefully have the motor ready to put in tomorrow.

Larry

cam break in,
you're probably up on this already but new oil wiping out a lot of new cams these days,
Use lots of break-in cam lube (GMEOS or Crane are my fav's) and a zinc oil like Rotella-T etc

I always spin the distrib first to get oil pressure up, that helps pump up the lifters too somewhat

I bet it's the cam RichardJ identified, PAW sells this grind too now.

I've got a couple of gallons of Delo.

I used Lubriplate on the cam in a bent 8 a couple of years ago didn't have any problem, till the head cracked after 10k.

I've got a screw driver blade with a 1/2 drive I'll put on my air ratchet. I'll put a mechanical oil gauge in place of the sender and see what it comes up to.

RichardJ's cam has more lift and I haven't tried to decipher the rest of his numbers. I haven't even looked at my number that close yet.

The HEI looked better than I expected, except the Bozo that installed the module didn't put any white (I forget what you call it) grease under it.
I need another vac adv. The one that is in is only 15 degrees, I want 23-26.
Larry

You'll do a lot better with one that has about 8-10 degrees advance. You would have a hard time getting it to run decent and not ping itself to death, even if you could find one like 23-26.
An air ratchet might be a tad overkill. A small battery powered drill is more than enough. Pulling the engine over by hand while you run the pump is always a good idea.