Hex adjustable timing sets- can they slip?
04-30-2013, 04:43 PM
#1
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Hex adjustable timing sets- can they slip? I am considering changing the cam in my LS1 to a comp cmas 54-459-11. Engine is stock standard except for mafless tune in a RX7 FD. It has a very large exhaust and air intake with stock 241 heads adn lS6 intake. But anyway with the comp cams 3158kt and cloyes 9-3158A it appears the cam load goes on to the hex bush. I was wondering if the bush can wear out or slip with time? Would it be better to get a 9 keyway timing set? Also double or single chain. I realise with a double chain the oil pump has to be packed out and there maybe problems with the oil pump to timing cover problems.
05-01-2013, 04:17 AM
#2
When you tighten down the bolts once the cam is correctly degreed, the upper sprocket is tight against the cam and can't move. The little adjusting cam takes no load and is only used for moving the sprocket relative to the cam in small increments to degree the cam. So it has no worse chance of moving than the stock setup and won't as long as the bolts remain tight.
I prefer the single sets. Just make sure you are carefull with harmonic damper selection as this can be the cause of timing chain failures as well.
I prefer the single sets. Just make sure you are carefull with harmonic damper selection as this can be the cause of timing chain failures as well.
Last edited by vettenuts; 05-01-2013 at 04:29 AM.
05-01-2013, 07:11 AM
#3
When you tighten down the bolts once the cam is correctly degreed, the upper sprocket is tight against the cam and can't move. The little adjusting cam takes no load and is only used for moving the sprocket relative to the cam in small increments to degree the cam. So it has no worse chance of moving than the stock setup and won't as long as the bolts remain tight.
I prefer the single sets. Just make sure you are carefull with harmonic damper selection as this can be the cause of timing chain failures as well.
I prefer the single sets. Just make sure you are carefull with harmonic damper selection as this can be the cause of timing chain failures as well.