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.
Well guys i ordered my scavenge pump. Ebay special. well see how it goes.
anyways. What im wondering is where should i mount the thing. Also ive been reading people saying put check valves here and there and everywhere else so oil doesnt back up in the turbo and what not.
tell me if this will work
Get pump mounted lower than turbo if i can. (cx racing hot side mounts low)
run return from pump to valve cover.
done
in my head that should work. any oil left in the turbo should drain in to the pump when not running and keep the pump kinda primed. plus running the return to the valve cover should yield me the vented "sump" idea correct? since the covers are vented to atmosphere anyways.
now what if i cant get the pump lower than the turbo? do i need some sort of tiny sump box that can collect left over oil or should i run a delay time for 20 seconds or so?
On my friends Rear mount GTO the oil feed went from the factory oil cooler adapter straight to the turbo like this.
As for the return/drain. The drain went into the scavenge pump. Then the scavenge pump routed into the pcv nipple of the left valve cover. In the pic below its named BLANK.
But as a word of caution always check your turbo. Just cause the pump makes noise doesn't mean it's doing the job. His didn't, which caused the turbo to seap oil. A turbo rebuild was the end result. Scavenge pumps work but they require constant supervision. On his setup the turbo was about 1inch higher.
Maybe because such questions have been asked hundreds of times before and a few minutes searching would tell you everything you needed to know.
But mounting positions etc will vary from pump to pump...and probably be more critical the cheaper and more fragile the pump will be.
You're already aware of the reasons for check valves but seem to ignore them ?
And running a low pump and high level return....when you shut down, all the oil in that line will run backwards into pump and turbo saturating the turbo and probably leaking into compressor and turbine sides.
I'm not new to forums. I have searched. Hence how I knew what I knew. But I'm not ignoring the use of check valves just unsure of where they go. Thanks for your insight tho.
I am new to turbos as well. But without researching this, the check valve should go between the scavenge pump and the engine. This keeps the oil from backing up towards the pump or turbo when shut down. If the turbo is higher than the engine it will never get oil backing up into it. Its all dependent on the location of all the parts. The pump should be below the turbo so its able to self prime. Most pumps like to push fluid and not pull it. Same reason that external fuel pumps should be mounted below the tank or cell.
I am new to turbos as well. But without researching this, the check valve should go between the scavenge pump and the engine. This keeps the oil from backing up towards the pump or turbo when shut down. If the turbo is higher than the engine it will never get oil backing up into it. Its all dependent on the location of all the parts. The pump should be below the turbo so its able to self prime. Most pumps like to push fluid and not pull it. Same reason that external fuel pumps should be mounted below the tank or cell.
I am new to turbos as well. But without researching this, the check valve should go between the scavenge pump and the engine. This keeps the oil from backing up towards the pump or turbo when shut down. If the turbo is higher than the engine it will never get oil backing up into it. Its all dependent on the location of all the parts. The pump should be below the turbo so its able to self prime. Most pumps like to push fluid and not pull it. Same reason that external fuel pumps should be mounted below the tank or cell.
Check valve should go anywhere needed where oil has the potential to gravity drain into the turbo.
A good scavenge pump like the Exa will self prime at almost any height, such pumps are very different design than most efi style fuel pumps which must be gravity fed.
But very much yes, almost all pumps prefer to push rather than pull, so if you can mount it low it is better. But by no means essential with the right parts.
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.
teach me about scavenge pumps 
