My worn follower wouldn't come out the top, but I was able to drop it out the bottom once the cam was removed. If you can't removed the cam due to the damaged follower, you may have a bit more of a challenge on your hands.
Paul |
I started the reassembly today, but on unpacking Doug's H+M cam and followers, I discovered that it has shell rather than dumbbell type followers, which obviously means longer pushrods.
My question is, would it be easier and possibly cheaper to buy a new set of dumbbell followers, or do I need to get some custom length pushrods? I have Dove roller rockers and I've just ordered some new posts, end-supports and spacers from Precision Pumps. Thanks, Paul |
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Can happen suddenly and failure occurs in a short period. Gary |
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The lifters are considered used. Swapping a cam to another engine needs new lifters. |
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Never heard of Dumbbell followers. |
Here is a link to the Comp Cams solid "dumbbell" lifter:
https://www.summitracing.com/int/par...5-16/overview/ Based on the advice being given, I should be buying new lifters in any case. In retrospect, it would probably have been easier to buy a new cam and lifters from the outset, rather than buying dcdoug's used items. I've had a closer look at the other lifters that I took out of the engine and they're worn flat on the cam end, rather than having the necessary convex profile, so they were all on the way out. Paul |
The link doesn't work Paul.
I've searched Summit for "dumbbell" and I can't find that either. Gary |
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Dumbbell.. :-)
They have a reduced diameter (neck) from halfway to a quarter up to save weight. Actually look like a mini dumbbell. |
Update...
I'm now talking to Brent about a custom ground cam rather than using Doug's old cam, so I think I'll be going down that route instead. Anyone want a Holman + Moody cam and followers? :rolleyes: Paul |
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If I were starting from scratch, I'd probably go down the shell route, but as my top-end has been setup for the dumb-bell type, I'll stick with those. Paul |
Yes Paul, I thought that's what we are talking about here, wasted at the middle.
Looks like a dumbbell, just never heard referenced in that manner. Lightweight solid lifters makes more sense for me, :). Gary |
Update:
I gave up on the original idea of using Doug's used H&M cam and followers and Brent spec'ed up a new cam for me specifically for my engine and intended use. This is what he came up with: ...........................Intake................. ..........Exhaust Total Lift:.............. 589" ............................ 600" Duration @ .050":.. 242" .............................244" Valve Timing @ .050": ........ Open ........................ Close Inlet: .............................. 17 BTDC ................... 45 ABDC Exhaust: ......................... 58 BBDC .................... 6 ATDC Intake Centreline: .......... 104 degrees LSA: ............................ 110 degrees The engine is now all back together and back in the car and the dreaded cam break-in procedure has been done, so I'm now ready to hit the road, apart from one thing........me! A couple of weeks ago I managed to totally detach my left bicep while at the gym. I needed surgery to reattach it, which involved drilling an 8mm hole into my Radius bone and fastening the loose end on my bicep into it with screws and a metal "button" on the back to prevent it pulling through. I can lift nothing heavier than a cup of tea for 4 weeks and then I can very slowly start adding some weight. I'm hoping to be able to start driving again in a couple of weeks. Thank you everyone for your help, especially Brent, who was very helpful and patient with my endless questions. Paul |
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To give you an idea, it has 6 degrees of advance, take that out, we end up at 11/51 on the inlet, 52/12 on the exhaust. So depends on what you want the engine to do. I would like figures of 13/49, 54/10. But your lift increase will certainly help. Valve springs to match of course. Gary |
If compression allows, I always grind a lot of advance into my street cams. The throttle response and snap is very much noticeable.
Most of my 110 LSA cams end up on a 104 ICL. My 106 and 108 LSA cams will usually end up at either 102 or 100 ICL, if the piston/valve clearance and the compression ratio will play nice with each other. |
I haven’t driven it yet, but it sounds great. :)
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That sounds like a painful injury. Hope you have a speedy recovery and get a chance to try it out.
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