Got An LS7 You Want To Run As A Wet Sump? This Cool Drill Guide Will Help Your Conversion By Making The Dipstick Install Easy


Got An LS7 You Want To Run As A Wet Sump? This Cool Drill Guide Will Help Your Conversion By Making The Dipstick Install Easy

GM’s LS7, the engine that came in Z06 Corvettes, was factory equipped with a dry sump style oiling system. I say dry sump style because the system they use isn’t exactly the same as a race style dry sump, but does give improved oiling in high G road race scenarios. Because the factory system still picks up oil in the bottom of the pan, with a standard pickup, and has only that one suction stage, it isn’t quite up to snuff compared to your typical 3+ stages of suction on a standard dry sump.  But what if you get your hands on one and don’t want to have to figure out the packaging and oil tank location in whatever you are swapping it into? Converting an LS7 over to a standard wet sump is as easy and acquiring the right LS3 parts, but there is one thing missing. GM never drilled the hole for the dipstick in an LS7 block because the dipstick is in the oil tank.

Thankfully, the guys at Holley have a new drill guide just for you folks who want to do this conversion.

Not only is it a bolt-on drill guide that allows you to use a hand drill to get the engine ready for a standard dipstick, but it also has a cool groove machined in it that allows for a shop vac to suck out the chips while you drill it!

Check it out.

LS dry sump engines have the dipstick in the remote oil tank. The boss in the block that is typically used for the dipstick is not drilled. When converting to wet sump the boss must be drilled. This boss is parallel to nothing else and you only get one shot at the hole. Holley has developed an easy guide to help locate the bit during the drilling process. Using two nearby threaded block holes, the guide creates easy alignment for a hand drill to exactly drill the hole GM would have for a wet sump application. Innovative drill chip slot allows chips to be vacuumed during the drilling process.

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