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| 264 cam https://slantsix.org/forum/viewtopic.php?t=62658 |
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| Author: | elvaliant67 [ Mon Jul 30, 2018 7:52 pm ] |
| Post subject: | 264 cam |
What would the valve lash be set at for a 264 duration cam? Thanks in advance! |
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| Author: | Charrlie_S [ Tue Jul 31, 2018 2:27 am ] |
| Post subject: | Re: 264 cam |
Who's cam is it? Crane, Comp, Clifford, Etc? |
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| Author: | elvaliant67 [ Tue Jul 31, 2018 7:53 pm ] |
| Post subject: | Re: 264 cam |
It’s a Clifford |
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| Author: | drgonzo [ Wed Aug 01, 2018 7:29 am ] |
| Post subject: | Re: 264 cam |
According to Clifford's website their 264 cam is hydraulic lifters, so zero lash. |
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| Author: | Killer6 [ Thu Aug 02, 2018 4:48 pm ] |
| Post subject: | Re: 264 cam |
 Yeeaaahhhhh, I'd stop right there, unless it's an older Cliffy design, (& I can't recallthem ATM) then You shouldn't/wouldn't have adjustable rockers to begin with to go with that cam. That's a completely different rocker/tappet/pushrod setup, & if You're trying to run a Hyd. cam w/mech. valvetrain, it ain't gonna go well....................... |
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| Author: | Killer6 [ Thu Aug 02, 2018 4:58 pm ] |
| Post subject: | Re: 264 cam |
Now if You have a Hyd. cam & valvetrain, then You would be looking to check the lifter preload, and using pushrod length changes or rocker shaft shimming to adjust it. Pushrod length correction being the best choice, unless shimming the shaft will be minor, or actually improve geometry in doing so. I've not played with Hyd. valve train on Slantys, so I'm not sure how "on" or not they are stock, plus Your actual set-up (valvestem height etc...). |
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| Author: | elvaliant67 [ Thu Aug 02, 2018 9:43 pm ] |
| Post subject: | Re: 264 cam |
Thanks everyone for the input . Yea that is my problem the Previous owner set it up with mechanical valve train on a hyd. Cam . No wonder it would always make a “ salt shaker” noise LOL . |
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| Author: | Charrlie_S [ Fri Aug 03, 2018 1:28 am ] |
| Post subject: | Re: 264 cam |
Not necessarily previous owners fault. At one time Clifford was selling cam kits, with hydraulic cams, and solid valve train. He wouldn't listen to any one that told him it wouldn't work. |
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| Author: | Doctor Dodge [ Fri Aug 03, 2018 10:03 am ] |
| Post subject: | Re: 264 cam |
FYI... If it is a hydraulic lobe profile, then .006 to .008 is the approximate amount of mechanical valve lash it will take before getting noisy. ( I have seen and "worked-out" this issue before...) A tightly lashed solid lifter hydro cam will perform like a "bigger" cam when you set the lash that "tight" so the engine will need more compression to get anywhere close to making good power. Short term: Experiment with tighter valve lash setting but plan on changing out the cam because lash settings that tight does not allow enough clearance for exhaust valve expansion rates and "on the seat" valve cooling time. DD |
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| Author: | drgonzo [ Fri Aug 03, 2018 8:04 pm ] |
| Post subject: | Re: 264 cam |
If you run hydro lifters with the hydro cam the adjustable rockers should be fine. Other engines use the same adjustable rockers on both hydro and solid cams. |
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| Author: | emsvitil [ Fri Aug 03, 2018 9:07 pm ] |
| Post subject: | Re: 264 cam |
The oiling for hydraulic tappets on a slant is backwards from other engines. Oil flows from the rear cam bearing, to the rocker shaft to the rocker arms, then down the pushrods to the tappets. Adjustable rocker arms won't work if you want the hydraulic feature. |
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| Author: | drgonzo [ Sat Aug 04, 2018 6:20 pm ] |
| Post subject: | Re: 264 cam |
Quote: The oiling for hydraulic tappets on a slant is backwards from other engines.
Thanks. I understand now.
Oil flows from the rear cam bearing, to the rocker shaft to the rocker arms, then down the pushrods to the tappets. Adjustable rocker arms won't work if you want the hydraulic feature. |
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