we have the moroso kit to put screen in the lifter valley return holes and to plug the 8 smaller holes up. Is this ok to do with a street sbc? It is a full solid roller valvetrain.

also i am going with a melling select pump. Do i really need a HV if i use restrictors, and which restrictor size is the best?

thanks
mike

I have the return screen kit in my street/strip 388 I also have a 7qt oil pan and a hv pump and I have never had any problem. the reason I put it in is because I have full alum roller rockers and the thought of one of them breaking and it getting all in the oiling system scares me.

i have a stock pan and will be using the 25 % more HV pump. i guess the plugs will work ok.

I like to leave the factory holes open to allow a little oil on the camshaft for street operation, I don't ever use restrictors in stock blocks, and you need more than what the stock pan holds if you plan to rev it at all.

Do not run the oil restirictors period with any modern lifter set. The oil restriction is handled inside the lifter. Running the galley restrictors will starve the rockers springs and push rods resulting in damage.
DR

at what RPM would i need more. i will only drag race maybe twice a month and hit maybe 6500.

thanks

i am using 818-16 solid roller lifters. do they regulate oil supply?

thanks

Depending on he cam and oil pump determines whether or not you need cam oil gallery restrictors.

We are running a Comp Cams solid lifter roller cam in our 292 (.060" over 283) for our S10 drag race only truck. Said cam revs to infinity but the specs say 4500 to 7500 rpms so we have the restrictors in there.

Years ago I built a 302 SBC, 10 qt Moroso oil pan, Melling HV pump. Put it in my 64 Chevy II with BW T10 and 4.10 geared 12 bolt. If you kept it WFOT for extended periods of time the oil pressure would fluctuate and it would start pouring blue smoke out the exhaust. I had to pull the motor back out and put the restirctors in as it was pumping all the oil up to the heads when it wasn't needed there. Problem solved.

BTW, oiling has NEVER been a problem with a small block Chevy. Before they came out with HV pumps, ALL the early engine with nasty solid lifter cams NEVER EVER had a lack oil pressure or volume problem. Anyone who brags about having oil pressure in excess of 55 psi doesn't know that the oil pump will cavitate beyond 55 psi. That is a fact from Grumpy Jenkins who along with Zora Arkus-Duntov were the fathers of the small block Chevy.

here is what i am thinking about running

it is the 12-770-8 solid roller cam 2000-6000
818-16 solid roller lifters
1.52 pro magnum full rollers
melling select pump 25% more oil
stock pan
moroso oil return screens and plugs kit


This car will see the street about 30 miles a day will barely go over 3000 rpm with the 4.11 and will be even less when the T56 goes in. Does anyone recommend the restrictors with this set up. i am afraid about not getting enough oil to keep the valve train cooled at this low rpm on the street with restrictors.

thanks

1981z28owner,, rustbucket and chopped called it for your setup. i agree with them. i'd also use a higher capacity pan as well.

here is what i am thinking about running

it is the 12-770-8 solid roller cam 2000-6000
818-16 solid roller lifters
1.52 pro magnum full rollers
melling select pump 25% more oil
stock pan
moroso oil return screens and plugs kit


This car will see the street about 30 miles a day will barely go over 3000 rpm with the 4.11 and will be even less when the T56 goes in. Does anyone recommend the restrictors with this set up. i am afraid about not getting enough oil to keep the valve train cooled at this low rpm on the street with restrictors.

thanks

Phone Comp on that cam, have them grind it on a steel billet with cast dist gear. The cast roller cam cores aren't liked by many in the business.

Watch out using Comp's stainless rockers on heads using springs larger than 1.46 in diameter, they are excessively bulky in the fulcrum area and will touch the retainers, potentially dropping valve(s). I prefer the Crane Gold race, 7/16 stud model, cut for 1.630 springs. Extra retainer clearance, minimal stud flex, and won't limit you if you step up down the road. Although that cam doesn't need the spring pressures that necessitate a stud girdle, you may want to entertain it anyways, good for added stability.

Buy good correct length pushrods, Comp Hi Tech's come to mind.

You don't need a HV pump at your intended RPM, and HV pumps and stock pans are asking for trouble. Pump a pan dry and the bearings take a beating very quick, before you notice it on the gauge.

Increasing oil capacity to 6 quarts and beyond is one of the first changes we make when designing an engine. A well designed oil system will not only guarantee oil supply when it is needed, but can also be a source of free horsepower. This pan is a good example, but don't forget the correct pickup and a stock volume pump with the z/28 oil pressure spring.
http://store.summitracing.com/partdetail.asp?autofilter=1&part=MOR%2D20191&N=700+400105+4294840045+4294908216+4294925054+4294873401+4294881474+115&autoview=sku
Naturally, if you're building a 383 or 400, you will have to alter your selection, but this pan gives you an idea anyways.

You can go for the screen kit, but with quality components by the time something fails enough to require a screen kit, then engine will require disassembly anyways for repairs.

how much clearance do you want between the rocker and the spring? does anyone have a pan. i am about out of money to spend on this, and would need a used pan. i am going to use the Hi tech pushrods and will get a stud girdle this summer before drag racing starts.

also, i talked to CC last week adn they said with the cam i am getting, i can run the GM melonized gear and it will work fine.

thanks