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11-14-2011, 06:23 PM | #81 |
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Re: How's your cam ??
That engine/cam/fuel mix just screams NASTY !!
Im running a kustom ground Tatom blower cam in my 8BA at 289ci. HAULS !! BFD |
11-21-2011, 04:31 PM | #82 | |
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Re: How's your cam ??
Quote:
Larry Young |
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11-21-2011, 07:54 PM | #83 |
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Re: How's your cam ??
Anyone here running a Tatom built motor?
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11-21-2011, 08:57 PM | #84 |
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Re: How's your cam ??
Larry
After racing drags as well as stock cars for many years I thought I had a sense about cams. I do not profess to be knowledgeable in cam design. I've known David Generous for over 30 years and he's been very helpful in exolaining the ups and douns of camshafts. At this point in my engine building efforts I;ve been trying to geet more efficency out of our Flathead and am building an econo engine specificity for fuel mileage, without sacrificing performance. So far we've succeeded in puting a 276 ci engine in a 3800 lb car and getting exelent mileage. It's at it's best right now with 21.5 in a 50 mile route that consist of 66% local roads and 33% interst5ate. Now here the RUB, it shouldn't do this , the engine has a Cam techniques L-100 246/235 at .050 .360 net lift. The economy engine is similar but with an EAB cam. There must be a reason why this cam performs as well as it does. One other engine in a 37 4 dr seadn gets 21 mpg on a trip which des not have any interstate driving. I feel I could get more from this engine if we removed the 97's and installed a better distributor, but the 42 crab dist id performomg well so far. I've plotted a few cams before and I have a Howard M-6 which may work quit well from a mileade point of view. But we hot ridders like the sound of a hot cam. Regards Ol' Ron |
11-21-2011, 09:00 PM | #85 |
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Re: How's your cam ??
That should read M-8. sorry.
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11-22-2011, 09:52 PM | #86 |
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Re: How's your cam ??
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11-22-2011, 10:35 PM | #87 | |
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Re: How's your cam ??
Quote:
HA HA HA ROFLMAO...... |
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11-23-2011, 07:52 AM | #88 |
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Re: How's your cam ??
Haha ok I worded that wrong. I heard that if you let the eliminator idle to low or too long it will wear out your valve train. It is sometimes hard to tell who is b.s. you
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11-23-2011, 01:11 PM | #89 |
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Re: How's your cam ??
I've torn down quite a few flatheads and ran across some reground cams that I could never identify. It seems as though there were many unknown folks grinding camshafts for a lot of uses in the 40s and 50s.
Has anyone ever tried to compile a list and ID markings? Especially for the lesser known brands. What brings this to mind is that I just pulled a few out of my shed and have one marked "L 49". Haven't measured it yet. Oh, by the way( Ol Ron if your listening) I put an L-100 in my 8BA and never bothered to look. Is the L-100 marked by cam techniques? |
11-23-2011, 02:50 PM | #90 |
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Re: How's your cam ??
Unless somebody is copying them? Yes. Where did you get it?
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11-23-2011, 08:04 PM | #91 | |
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Re: How's your cam ??
Quote:
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11-24-2011, 02:13 PM | #92 |
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Re: How's your cam ??
I don't know if any of you have run across Harvey Cranes website - http://www.harveycrane.com/duration.htm. Lopey idle is a result of valve overlap, the degrees both valves are open. This spells a loss of low end torque. Of course, you can make up for that loss through other mods.
Can someone post the 0.050 and seat timing numbers for the L-100 cam? I've seen some of the numbers, but no lobe separation. |
11-24-2011, 02:20 PM | #93 | |
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Re: How's your cam ??
Quote:
LIFT: .375" DUR: int 270* exh 260* (246* & 238* @ .050") LSA: 112* CL: 108* LASH: .016" |
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11-24-2011, 04:25 PM | #94 |
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Re: How's your cam ??
This is such a good thread, I'd like to include lifters in it as they are part and parcel of the cam setup. I've read posts here and on the Hamb stating that modern Johnson replicas are rubbish. I dont know if that's true or not..... would anyone care to throw their 2cents in? Are there viable lightweight alternatives? Does lifter weight play much part in a flathead valvetrain? Here in New Zealand, back in the days when flatheads were common at racetracks, guys used to build up valve stems and/or lifters with brazing because adjustables weren't available here. Is this still done?
So many questions, so little time............ |
11-24-2011, 06:04 PM | #95 | |
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Re: How's your cam ??
Quote:
A large percentage of it is deserved...Everyone has stories of them lasting forever and others say they had them back off almost immediately. Most are probably made offshore now so who can know? I advocate using stock hollow steel lifters and welding the valve stem if they are too short....It takes longer to do but you only do it once and they never move. In high performance (not street) engines adjustables have no place. |
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11-24-2011, 11:54 PM | #96 |
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Re: How's your cam ??
How about modern cam designs in a flathead? I'm thinking of the "Thump'r" series cams from Comp Cams. Has anybody run one of these? Are they for 'show' or 'go'?
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11-25-2011, 10:34 AM | #97 | |
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Re: How's your cam ??
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I'm interested in that as well. I'm always leery of a cam advertising "the sound" vs. performance. Almost makes it seem hokey. |
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11-25-2011, 11:46 AM | #98 |
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Re: How's your cam ??
The L-100 looks similar to an Isky 400Jr with 3 or 4 degrees of advance.
If you are concerned about valve train weight, you can find some information at http://www.tildentechnologies.com/Cams/CamSprings.html. You can't beat the stock lifters for weight. |
12-31-2011, 06:00 PM | #99 |
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Re: How's your cam ??
Does anyone have an audio clip of the isky 1007b
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12-31-2011, 10:06 PM | #100 | |
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Re: How's your cam ??
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