converting Lq4 block for priority oiling?
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From: metro detroit, mi
converting Lq4 block for priority oiling? Was talking to a guy yesterday, and he told me his engine builder is converting his engine block to priority oiling to the mains. Is this possible? He said it involves drilling a hole on the outside of the block? Anybody do this? Any pics?
LS style blocks are pretty durable as is. I haven't heard or seen to many/any complaints as far as that's concerned. I'm not saying the mains can't be starved thou.......anything s possible.
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From: Colorado Springs, Co/ Central, Ca
I don't see the priority oiling hurting anything if done right but unless you are making excess of 1600 hp and or turning over 9000 RPM consistantly I don't think it will do much for you. These engines are pretty amazing in stock to near stock form. What problem are you having with your bearings?
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On stock block seen here. The two galleries feed everything. Mains are last in line
On the lsx the galler y on the right lower is the first gallery, it feeds the mains first, and from there the can bearings...... Then oil enters the two upper galleries to feed the lifters
On the lsx the galler y on the right lower is the first gallery, it feeds the mains first, and from there the can bearings...... Then oil enters the two upper galleries to feed the lifters
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Just curious as the 2 "LS" SCCA buds I know all have oil accumulators, big oil pumps, and improved racing baffles on basically stock LS1's. And specifically said it was to fight the bearing oil starvation issues. They appear to be holding up well with these modifications.
Last edited by Forcefed86; Feb 6, 2015 at 12:44 PM.
I had heard most of the bearing failures on "stockish" road course stuff was due to the factory oil pump flow falling drastically at sustained highish RPM? Also the Gforce/pickup issue on corners. Any of those customers that picked up an LSX block bolt a factory oil pump to it? Or run factory pan's and pickups on the aftermarket blocks?
Just curious as the 2 "LS" SCCA buds I know all have oil accumulators, big oil pumps, and improved racing baffles on basically stock LS1's. And specifically said it was to fight the bearing oil starvation issues. They appear to be holding up well with these modifications.
Just curious as the 2 "LS" SCCA buds I know all have oil accumulators, big oil pumps, and improved racing baffles on basically stock LS1's. And specifically said it was to fight the bearing oil starvation issues. They appear to be holding up well with these modifications.
FormerVendor
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The c5r block is a non priority main block and I know there have been a few of them on the track without bearing problems.
Non priority main blocks work fine if you fix the oil leakage in the blocks. Generally the lifter bores are out of round and too big and you have lots of leakage around them. I've either bored and put in .903 lifters or put in lifter bushings. You can also put in roller cam bearings, they do not require pressurized oil and make a pretty good difference.
Either way I've seen 8800 rpm on non priority main blocks with stock style oil pump.
Non priority main blocks work fine if you fix the oil leakage in the blocks. Generally the lifter bores are out of round and too big and you have lots of leakage around them. I've either bored and put in .903 lifters or put in lifter bushings. You can also put in roller cam bearings, they do not require pressurized oil and make a pretty good difference.
Either way I've seen 8800 rpm on non priority main blocks with stock style oil pump.
This is after 40 passes with a cog driven f2 hanging off the side of it.
