Technical > Matt Shaff's Engine Shop
oil returns,valley tray and other small hp increases
wideopen231:
After reading few things on oil control , I did some real close checking on my TFX hemi stuff. Returns from heads suck. Small 5/16 holes and rear left does not even return. I am adding some returns from block just below deck where heads drain to and going into pan below the windage tray. Going to run aluminum line since no pressure and has to aid in cooling some.
Also added a piece of aluminum in lifter valley to help keep oil off bottom of intake and Hopefully keep it cooler. Also had oil drianing to ends so as to keep oil draining back on top of rotating assembly reduced.
As posted on another thread I.m also looking into adding a oil accumalator to system.
HAve already added gas ports to the pistons in hopes of picking up few extra ponies.
Figure its worth cpl horse's maybe not enough to notice by them selves but they add up.
Wondering what other tricks some here have done or tried and what results where. Also any thoughts on above ideas are always welcomed.Might read and ignore, but like to give any idea a look.
dreracecar:
To many variables at the track, being consistant .00X on the tree is like free HP that doesnt add to the weight of the car.
I dont know if you quite understand what an acc-u-sump is or does, reducing the volume of oil in the pan raise's oil temp because less oil to remove heat out of the engine. When oil pressure falls below XX lbs the oil within the accusump fills that void by releasing its contents into the system until pressure is restored and then the accusump re-fill's itself. If you are having pressure issues when the chutes come out and is showing up in the bearings- then thats when you consider this option.
Adding a baffle underneath the manifold does nothing in our 7 second drag world. Alc will maintain a 64* temp charge when injected into the ports
Do you think by adding gas ports to the pistons of a blown engine that the added cyl pressure will increase the ring pressure against the cyl walls and do 2 things to lesson HP? one is the extra drag slowing down the piston speed and two being acclerated wear of the rings and cyl walls.
masracingtd1167:
--- Quote from: dreracecar on February 16, 2014, 10:33:04 AM ---To many variables at the track, being consistant .00X on the tree is like free HP that doesnt add to the weight of the car.
I dont know if you quite understand what an acc-u-sump is or does, reducing the volume of oil in the pan raise's oil temp because less oil to remove heat out of the engine. When oil pressure falls below XX lbs the oil within the accusump fills that void by releasing its contents into the system until pressure is restored and then the accusump re-fill's itself. If you are having pressure issues when the chutes come out and is showing up in the bearings- then thats when you consider this option.
Adding a baffle underneath the manifold does nothing in our 7 second drag world. Alc will maintain a 64* temp charge when injected into the ports
--- End quote ---
I use the accusump for that same reason but I think I may have solved the problem with a different oil pickup and a trap door in the pan . Bill
wideopen231:
I totaly understand how the accumalator works and why. I also understand that with the NA mtor I am running using Blown engine parts thru out I have access in few areas. 110 to 120 lbs OP at idle and having 10 quarts in ,thers no way I am going to pull near the oil as quick,lower rpm lower rpm accelerating rate and not to mention 4500 versus 7000 stage rpm. I don't see the pickup becoming uncovered except maybe on had deceleration like dropping at the finish line hard. In this case it would be good insurance. Having less oil in the pan which would be furthure down from windage tray and just below tray has to help with less chance of oil to pulled up into hurricane going on above.
I don't expect to pickup 50 horses or nothing like that. I have talked with a lot of guys who have picked up .10 from running less oil.Yea I had hard time believing first cpl,but after more tell you same thing. Yes Im sure some of them had too much oil and it was too high of level for the pan they had. I love going faster but not at cost of needless risk to engine.
As for weight you might be right about trade off. IMO if it equals out and helps prolong parts life I am fine with that. This is bracket deal and consistent is f utomost importance. If hitting a race where minimum weight is big deal I will just remove this along with full Chute body and go to the short body.
Baffle may or may not matter.I do not see how it can hurt. Plus super easy to remove or add.
R-M seems to have different view about gas ports. Agree if was blower motor no need.This is injected only and not even nitro, just , plain old alcohol.
Reading R-M site and seems they built a motor w/o Gas ports at customers request.It was down 50 hp. Pulled it did gas ports NOTHING else. Put it back on dyno and it was up the 50 and where they expected it to be. Not knocking anyone but hard to argue with Reher-Morrison on what they found and are willing to backup
I am setting this deal up to be as versitle as possible and be easily adapted to as many class' as I can. Not to worried about making a Jr. Fuel settup the engine cost is out of my range now days for that one.
masracingtd1167:
--- Quote from: wideopen231 on February 16, 2014, 10:06:00 AM ---After reading few things on oil control , I did some real close checking on my TFX hemi stuff. Returns from heads suck. Small 5/16 holes and rear left does not even return. I am adding some returns from block just below deck where heads drain to and going into pan below the windage tray. Going to run aluminum line since no pressure and has to aid in cooling some.
Also added a piece of aluminum in lifter valley to help keep oil off bottom of intake and Hopefully keep it cooler. Also had oil drianing to ends so as to keep oil draining back on top of rotating assembly reduced.
As posted on another thread I.m also looking into adding a oil accumalator to system.
HAve already added gas ports to the pistons in hopes of picking up few extra ponies.
Figure its worth cpl horse's maybe not enough to notice by them selves but they add up.
Wondering what other tricks some here have done or tried and what results where. Also any thoughts on above ideas are always welcomed.Might read and ignore, but like to give any idea a look.
--- End quote ---
Chris a vac pump will help a lot . We are in the proccess of enclosing the cam tunnel on one of my friends Comp motors . We think this will be worth about 8 to 10 horsepower . The dyno will tell the story!
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