Comp Cams passes off 50 year old technology, as "New" cutting edge tech.

[In-Tech]

Elgin comes after Edelbrock in the dictionary

I never could figure Elgin out. The bulk of their stuff is white box cams repackaged, but Dema will do all sorts of oddball stuff and was the go-to guy for odd SCCA class engines.

Pretty sure Steve Gruenwald (spl) was doing his designs before leaving to do his own thing (Integral). He retired and sold his designs to Megacycle.

Not sure who started the whole white box $20 cams, pretty sure it was CMC. Pretty lazy lobes but would live in almost any environment. Nothing compared to what you or I would do. I loved Hansy's .408 lobes he did for Bernstein back when he thought he was gonna go Nascar. Man, with right spring, we could loft
.875 lifter .408lobe 296(seat) 258(@.050) 172(@.200) .012 lash ramp. It would just get bigger with RPM

I think we were around 8 tenths on lifter bore and 18 minutes on those skinny lobes, somewhere around 2 degrees on the Berco

[juuhanaa]

Wow, happy dyno off 10%

Clearly you don’t know how social media works. The more clicks you get, the more it becomes fact.

Basically, 1.5lb-ft/ci on pump gas, let alone a 2-valve, is naturally aspirated, is impossible:

So far:
410ci Shaver Ford WoO (mechanical injection, methanol): ~2.26hp+/ci, ~1.78lb-ft+/ ci
2010 358ci NASCAR "Open" engine (850cfm Holley, 12:1 compression): 2.42hp/ci, 1.59lb-ft / ci
Sonny Leonard 932ci "Extreme Pro Stock" (carburetor): 2.17hp/ci, 1.58lb-ft/ci
PME 397ci Chevy R07 (12:1 compression, tunnel ram, two carburetor)): 2.40hp/ci, 1.65lb-ft / ci
NHRA Pro Stock 500ci (PipeMax example, carburetor era, probably better examples out there): ~2.85hp+ / ci, ~1.69 lb-ft/ci
Wilkins Racing Ford 438ci RY45 Pro4 Trophy Truck engine: 2.18hp/ci, 1.5lb-ft / ci
Pro Power 412ci Ford RY45 (single carburetor): 2.21hp/ci , 1.72lb-ft/ci (< this sounds like a very happy dyno to me, so not sure I'm believing this one, unless it’s a methanol engine, but even still)

On pump gas, but does not meet emissions:
GM ZZ632ci Crate engine: 1.58hp.ci, 1.39lb-ft/ci


Then you look at the magic of 4 valves per cylinder
Honda K24 154ci USAC Midget engine (stock block, crank, head castings, EFI on methanol): 2.46hp/ci , 1.68lb-ft/ci
2005 Honda RA005 Formula 1 engine, 183ci: 5.27hp/ci , 1.72lb-ft/ci

On pump gas, meets full emissions, warranties:
Cosworth GMA V12 (244ci): 2.68hp/ci, 1.40lb-ft/ci
Porsche 911 GT3 RS (244ci): 2.1hp/ci, 1.41lb-ft/ci
the Ducati V4 Panigale and Chevrolet 5.5L ZL1 (4 valve) are both around 1.38-1.39lb-ft/ci

Probably the only dynos I’d trust the numbers on are the OEMs and pro race teams (Hendrick, Roush, TRD, Cosworth, etc), not a hot rod shop which probably does better having a happy dyno.

Where can i check the emissions for those 1.4lb-ft/ci engines? Thanks,



-juhana

[hoffman900]

Elgin comes after Edelbrock in the dictionary

I never could figure Elgin out. The bulk of their stuff is white box cams repackaged, but Dema will do all sorts of oddball stuff and was the go-to guy for odd SCCA class engines.

Pretty sure Steve Gruenwald (spl) was doing his designs before leaving to do his own thing (Integral). He retired and sold his designs to Megacycle.

Not sure who started the whole white box $20 cams, pretty sure it was CMC. Pretty lazy lobes but would live in almost any environment. Nothing compared to what you or I would do. I loved Hansy's .408 lobes he did for Bernstein back when he thought he was gonna go Nascar. Man, with right spring, we could loft
.875 lifter .408lobe 296(seat) 258(@.050) 172(@.200) .012 lash ramp. It would just get bigger with RPM

I think we were around 8 tenths on lifter bore and 18 minutes on those skinny lobes, somewhere around 2 degrees on the Berco

You should read CMC’s Glassdoor, place sounds miserable.

[Tuner]

So, the old GM '140' cam is not so bad after all? They will turn plenty of RPM with not much spring pressure and are easy on parts, even when you know they were run in a lofting condition (AKA valve float) for more time than 'modern' cams have parts flying every which way and loose, almost as if by magic.

[1980RS]

Some of the best cheap cams I have used are the Elgin grinds. I have used some Summit cams and all have worked well. Just got another one from Summit's circle track line that looked pretty good so I will test it out one of these days.