When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I've got an LS3 going into a race car replacing a SBC. I've already got the mechanical oil pressure gauge plumbed into the engine bay for the port on the back of the SBC. I see there's a port on the back of the DOD delete valley cover and it appears to connect to an oil line in the block.
I figure this would be where to tap into the oil pressure? I googled it a bit and found a few other ways of doing it but not this... which seemed odd. Or maybe I'm wrong?
I haven't looked into it but I believe you can get a adapter that has the washer to seal it to the valley cover and tapped for 3/8" oil sender.
Or even cheaper since valley cover off the engine just drill tap for NPT and use what ever reducer to match your current sender. Check to make sure your sender will clear the intake.
If it doesn't I would use the adapter port just above the oil filter.
From: Halfway back on the Highway to Hell...again!
You can get adapters to fit any port. The 3 main places to get readings from it the actual port in the valley cover. You can drill and tap the block of piece on the oil pan where the cooler lines would go or buy an aftermarket on that will have 2 1/8th NPT ports. Or you can get an adapter for the port on the left (driver) side of the block near the front. The same port you would use an engine oil primer.
I get all mine off Amazon. Bought many of them, never had a problem. Oh and the adapter for the 12
12mm to 1/8 NPT coolant port on the head is handy as well.
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
LS3 oil pressure port 
