BBC Oiling

Hi All,

We run a Rodeck ally block BBC with BacMan heads in an altered, got a little concern over the oiling, when I lift and pull the chutes at the top end, the oil pressure warning light comes on, also braking from the burnout it comes on, then when stopped it settles down and goes off.

We're running a Dan Olson steel pan, baffled with trap doors (checked they're free and moving fine), no kickouts or anything. 8 qrts of Lucas 20/50 semi syn, with a qrt of stabilizer, oil pickup is about 3/4" from the base of the sump.

Oil pressure on idle is fine (75-80psi) oil pressure is checked after backing up from the burnout and it's fine then too and no sign of the light on a run, and as I said after inital braking/slowing down the light goes out again.

Should we look at running a bit more oil or lowering the pick up? Or is it just one of those things to live with.

 

You can fit an accumulator like this

http://www.summitracing.com/parts/CTR-24-006/


Also pull your chutes under power as you go through the lights, it wont unsettle the car so much

 

Also how much oil do you get up top in your heads ?

Might be worth looking into restrictor plugs that go into the back of the block, keeps more of the oil in the sump

 

hi,
my car suffered similar problems,i use a moroso accumulator has helped.
its either an accumulator or dry sump setup?
8 qts a little lite on?,is it a full lenghth sump?
also run pickup 3/8 to 1/2" off the pan.
good luck brian

 

Oil Problems

We're also going to put a drain line from the back of both heads into the pan to get more oil back from the rocker boxes. You might try that as well.

Corey

 

Had the same issue in previous engines, lack of oil quantity. Accumulator will work but it is heavier and is more complex. Getting pickup closer may solve the issue outright. 3/8" to 1/2", clay the whole pickup and if you have to space it down, try to get all of it the same distance away from the pan. With your weight oil, the smaller clearance will give you more available quantity. My current engine uses just above 3/8" with straight 60wt and stabilizer. If you still have an issue after getting the pickup down, add a quart or two and see if that fixes it.

A baffle in front of the pickup will help slow down the oil a little when stopping on a burnout but it does not stop the rush forward completely. All the other ideas, i.e. oil drains from the heads or valley back to the pan will help too.

 

Thanks for the advise guys, I'm not a fan of accumulators, added weight, plumbing (something else to potentially leak!) expense and it's only ever really a bandaid rather than a proper fix.

I'll look at lowering the oil pickup, and as it's a full length pan a bit of extra oil in there can't hurt! Failing that improved drainback or restrictors looks like a plan

 

on a chevy deal your best bet is running restrictors and lowering the pickup. if you use the restrictors i don't think return lines from the heads will make much difference. i'd also add oil volume until you can't add anymore (obviously within reason)

best option, although this isn't what you wanna hear, is a dry sump on a bbc

on a wet sump deal i'd want one of the 'good pumps'... titan, billet moroso, etc

 

We run billet Moroso, highly recommend it

Lowering pickup helps with £££ too

 

BB Chev oiling

Hi all, we have always had the same issue but it dosent cause any damage as its not under power. We run a billet Moroso pump and about 8 quarts in a Hamburger drag race pan. The 50lb light comes on as soon as I pull the chute and start to brake but the pressure has started to recover by the time you shut the engine down when you are off the track. We have raced for 5 years with no issues. Cheers

 

We run more oil than that (11 quarts) , drain backs from the back of the heads , and the pick up is a lot closer.

Trap doors , windage tray and a crank scraper also help us.

Good Luck.....Wayne

 

bbc

Put more oil in it. The hoses from the heads help too. The heads are full of oil after the burnout. I can't believe it hasn't blown up already.
We run a Big Chief Chevy. 12 qts in the pan and 3 in an accumulator.2500hp and 9000+ rpm with no bearing issues. Synthetic oil only.
We use a titan pump but it will make your problems worse because it is higher pressure/volume and will fill the top end even quicker.

Our setup is per Jim Oddy but he said he would never try to make that much power with a wetsump.
These days lots of hemis make 3000hp with a wetsump.

Mike

 

I run a blown BBC and use a Jeff Johnston billet 2 piece pan, Titan oil pump and 14 qts of 50 wt VR1 oil. I run no restrictors and have never had an oiling issue or a valve train failure. I have never been a fan of restrictors in a bbc. I would rather have quantity of oil flowing through the engine over high oil pressure (my personal preference) . It also helps keep the valve springs cooler.

 

if your running screens in the lifter valley , get rid of them they will slow drain-back.

Can you put a larger pan on the car, 8quarts of oil is not enough volume!