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Cam measurement #2521182
07/12/18 08:26 PM
07/12/18 08:26 PM
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robin hood country
deaks Offline OP
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I checked the cam lift in my 470 today, i measured it with the dial gauge on the lobe and multiplied it by 1.5, i get .585 int, 615 exh. I've looked in the comp cams catalogue but can't find anything that matches, any ideas as to the make ? it's a solid roller.
Mick


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
Re: Cam measurement [Re: deaks] #2521210
07/12/18 09:13 PM
07/12/18 09:13 PM
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AndyF Offline
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Are you checking the cam in a block with a dial indicator? If you do that way then you can measure the lobe lift of the cam. If you have a degree wheel you can also measure the duration at 0.050 and 0.200 which will help figure out the lobe. If the cam is out of the block you can look for numbers stamped on the end. Usually there is a grind number on the cam.

Re: Cam measurement [Re: deaks] #2521234
07/12/18 10:36 PM
07/12/18 10:36 PM
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Central TEXAS!!!!
sr4440 Offline
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solid roller lobe #'s 1465, 4294, 4295, 4831, 12050, 2202 all have .390 cam lift. (.585 /1.5)
I didn't do your exhaust

did you look in the master lobe catalog?

http://www.compcams.com/Technical/Catalogs/CamLobeMasterCatalog.pdf


Joe


Without Data, you’re just another guy with an opinion.
Re: Cam measurement [Re: deaks] #2521339
07/13/18 06:42 AM
07/13/18 06:42 AM
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deaks Offline OP
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Andy, the engine is all together except for the heads, i had .040 shaved from the Indy -1 Heads to get a bit more comp, so i clayed the valves for clearance and measured straight off the lobe. I've been looking through the info i got with the motor and it says it's a Herbert roller D6H but i cant find the specs on their site.
Thanks Joe, i didn't realise i had the cam make and number untill i looked through my stuff.
Mick


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
Re: Cam measurement [Re: deaks] #2521389
07/13/18 10:53 AM
07/13/18 10:53 AM
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Originally Posted By deaks
Andy, the engine is all together except for the heads, i had .040 shaved from the Indy -1 Heads to get a bit more comp, so i clayed the valves for clearance and measured straight off the lobe. I've been looking through the info i got with the motor and it says it's a Herbert roller D6H but i cant find the specs on their site.
Thanks Joe, i didn't realise i had the cam make and number untill i looked through my stuff.
Mick


http://www.herbertcams.com/cam-grinds/


joe


Without Data, you’re just another guy with an opinion.
Re: Cam measurement [Re: deaks] #2521408
07/13/18 11:53 AM
07/13/18 11:53 AM
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So. Burlington, Vt.
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fast68plymouth Offline
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The one Herbert roller I ever measured wasnt even close to the advertised specs.
None of it was correct....... Not the Lift, duration, or lsa. All were off enough to where it was hard to believe the cam had the correct part number on it.
Of course, nothing else in their catalog matched my measurements any better.

I seem to recall Chip had a similar experience with his Herbert roller.

As Andy mentioned, put a degree wheel on it and measure it up.
It is what it is, regardless of what the specs say it's supposed to be.

I did find this with a little digging:
Quote:
CD6H 260/270, 605/605, 108LC, 3400-7400 ROLLER CAM


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Cam measurement [Re: deaks] #2521459
07/13/18 01:52 PM
07/13/18 01:52 PM
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deaks Offline OP
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I've just spoken to herberts and they tell me a D6H measures .604/.604 260/270 at .50 on a 108, so that can't be my cam. I haven't got a degree wheel.
Mick


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
Re: Cam measurement [Re: deaks] #2521461
07/13/18 01:59 PM
07/13/18 01:59 PM
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deaks Offline OP
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I've just been looking through some parts i have and would you believe i've got another herbert roller , it's a D6C, the card says.625/.625, 275int/283 exhaust at .050 on a 108 lobe centre.
Mick


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
Re: Cam measurement [Re: deaks] #2521473
07/13/18 02:38 PM
07/13/18 02:38 PM
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AndyF Offline
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Why don't you think that the cam you have is a D6H. Looks to me like it could be the one you have.

The real question is what are you trying to do? Do you need a different cam for some reason? Isn't the cam you have working for you? Just trying to figure out what the real question is.

Re: Cam measurement [Re: deaks] #2521486
07/13/18 03:17 PM
07/13/18 03:17 PM
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deaks Offline OP
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Sorry i went off at a bit of a tangent, when talking about the other cam, the one in the motor was the one i was looking for info about. Andy, i don't think mine is the D6H because the guy at herberts said the D6H was .604/.604, whereas mine measures .585 int/.615 exh. .390/.410 lobe lift. I haven't run the car yet, the motor's been on an engine dyno but i've had .040 shaved off the heads since then, hence why the heads are still off the car.


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
Re: Cam measurement [Re: deaks] #2521495
07/13/18 03:30 PM
07/13/18 03:30 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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Sounds like its time to invest in a degree wheel.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Cam measurement [Re: deaks] #2521505
07/13/18 04:18 PM
07/13/18 04:18 PM
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AndyF Offline
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Measure your cam again. I bet you'll find out that it is 604/604.

Re: Cam measurement [Re: deaks] #2521524
07/13/18 05:10 PM
07/13/18 05:10 PM
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deaks Offline OP
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lobe lift was .390/.410, i measured it twice on both, those numbers x1.5 make 585/610, yes i need a degree wheel.
A slight distraction but here's the dyno sheet before i made my changes. Mods are swap .060 head gaskets for .040, another .040 shave off the heads and HP 1000 to 1050 dominator, i'm hoping for another 25 hp. Engine is 470 low deck, 230 block, bushed lifter bores, cross bolted mains, zero deck, Indy 440-1 heads.
Mick

img051.jpg

69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
Re: Cam measurement [Re: fast68plymouth] #2521554
07/13/18 07:00 PM
07/13/18 07:00 PM
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Cab_Burge Offline
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Originally Posted By fast68plymouth
Sounds like its time to invest in a degree wheel.

iagree Knowledge is power scope
I use to race a street hemi in NHRA stock, I tested a bunch of different rocker arm sets on my motor at the retainers with the same cam and head using light pressure checking springs, them stupid stock 426 Hemi ductile iron rocker arms varied from .430 lift at the retainer to .520 on the same lobe with the same zero lash setting shock puke
Test, test and test some more thumbs wrench
You really need a decent degree wheel to degree the cam, that can make a hoop of differences on the track and at the engine dyno work scope


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Cam measurement [Re: deaks] #2521890
07/14/18 05:24 PM
07/14/18 05:24 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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When the lobe lift wasn’t what you were expecting, did you check another intake and exhaust lobe?


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads






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