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| Having valve guide tops cut down?? https://www.slantsix.org/forum/viewtopic.php?t=65164 |
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| Author: | NCDemon1971 [ Tue Jul 28, 2020 10:54 am ] |
| Post subject: | Having valve guide tops cut down?? |
If I were to use a Mopar 528 cam and 340 spec springs, how much would I need to have trimmed from the top of the valve guides? (or suggested amount??) |
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| Author: | hyper_pak [ Tue Jul 28, 2020 11:44 am ] |
| Post subject: | Re: Having valve guide tops cut down?? |
Someone might know a number, but you need to check your combination. Most of the time, cutting for a better seal will get the clearance you need. A seal like the teflon style, not the rubber style. |
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| Author: | Joshie225 [ Tue Jul 28, 2020 12:02 pm ] |
| Post subject: | Re: Having valve guide tops cut down?? |
.100" is my go-to for guide trimming, but you should install a valve and retainer to see what your gross clearance is now and subtract the height of the seal you'll use for the net clearance. |
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| Author: | Dart270 [ Tue Jul 28, 2020 1:21 pm ] |
| Post subject: | Re: Having valve guide tops cut down?? |
Yes, measurement is best, but 0.125" is a good ballpark. Careful you do not coil bind those 340 springs too. Not sure they can take that lift number. Good to see you on the site! Lou |
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| Author: | slantzilla [ Tue Jul 28, 2020 2:21 pm ] |
| Post subject: | Re: Having valve guide tops cut down?? |
340 springs are right on the edge with that cam. As Lou said, make sure to check coil bind. |
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| Author: | NCDemon1971 [ Wed Jul 29, 2020 9:16 pm ] |
| Post subject: | Re: Having valve guide tops cut down?? |
Thanks for the input! I'm going by what's on hand as far as valve springs go. I heard they need to be cut after the lift goes above .450...but I don't how much truth there is to that. |
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