Extra reliability for our Corvette’s dry-sump system | Project C5 Corvette Z06

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Update by J.G. Pasterjak to the Chevrolet Corvette Z06 project car
Oct 20, 2021

There’s a lot we like about our C5 Corvette Z06’s Aviaid dry-sump system, not least of which is the fact that it produces consistent oil pressure and flow under any conditions.

Long road course sweepers? No problem.

Fast autocross transitions? Plenty of oil for you.

If your car is powered by an LS3–notorious for oiling issues with wet-sump setups–a dry-sump system delivers a measure of comfort on track that lets you keep your focus on driving.

So we were pleased to hear that our friends at Aviaid had an even more bulletproof mod for our pump. Our pump’s original setup used a snap ring to affix the driveshaft to the pump body.

While these snap rings worked fine in most applications, there was room for improvement–and the opportunity to turn the assembly into a more maintenance-free accessory.

Aviaid’s upgrade involves drilling and tapping the rear of the shaft, then affixing the shaft into the body of the pump with an extra-wide truss-head bolt. The head of the bolt needs to be shaved down to fit under the end cap, but the whole assembly is far more reliable than the original C-clip.

Aviaid has introduced this change into its new pump shafts, but the company can upgrade older units. The customer, however, will need to remove the pump and disassemble the shaft–a straightforward procedure. We just sent the whole pump to Aviaid to be inspected and upgraded, which is also an option.

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View comments on the GRM forums
frenchyd GRM+ Memberand UltimaDork
10/19/21 3:48 p.m.

In reply to JG Pasterjak :

Not just Chevy but any engine.   I used to have to replace the bearings after every race weekend. I'd start out with 125 psi  and by Sunday afternoon be down to 20 psi or less by the last race.  
   Baffles, Accusump, overfilling, nothing helped. Removed stock oil pump and went to a dry sump and decades went by without replacing the bearings. 
Nowdays you see a dry sump pump in MGTD's.  

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