Looking at oil pumps/timing chains....sbc

[patmckinneyracing]

Looking at oil pumps from summit and was hoping to get some recommendations and which to stay away from. So far I've heard of serious quality issues with Melling and am avoiding them like the plague.

Now what does the whole high volume/high pressure mean? I'm looking for better oil pressure throughout the motor, so I'm thinking of going with a high pressure model. But what does the high volume mean? I have a regular 5 quart oil pan on my 350.

My typical oil pressure was 25-30 at idle and 40-45 on the highway. This go around, I want oil to be thrown all over the valvetrain to help prolong the lift of it. So which brand and type should I get? High volume or high pressure?

While I'm on topic here, I'm also looking at a timing chain. I'm looking for the most inexpensive double timing chain from summit. So far Cloyes and Comp Cams Magnum double roller are right in the 20$ price range. Are these good brands? What is the difference between a double timing chain that is roller or non-roller? I'll be running a flat tappet camshaft if that helps.

 

[79loserbluebu]

Well first off, Melling was having issues with their pumps not picking up oil and spreading it, but I beleive they did resolve the issue.

Also on the double roller Comp is a good and trusted brand, same with Cloyes. I beleive the only benefit from OE over double rollers are the fact that they take longer to stretch and they don't jump.

 

[patmckinneyracing]

Well from what I've read after googling the High volume/high pressure pumps is that they are not needed in a motor with clearances under .025 and that they can cause distributor/cam gear wear from the load of the extra oil. I'm just looking at getting more oil pressure and spray onto the valvetrain than what I was getting before. I could run the motor with the valve covers off and adjust my rockers and not have to worry about oil spray all over the place. My valve relief down at the oil filter is plugged as per my engine builder's specs. Thus far, people suggest using Melling's version of the old Z-28 style oil pump.

I was just curious what the benefit is behind a double roller over and OE non roller timing chain. My other question is that some of these timing chains allow for 2 degrees advanced and 4 degrees retarded on the camshaft....what does this do? I thought that you controlled the advanced/retarded timing through rotation of the distributor.

 

[bjohn07]

Well from what I've read after googling the High volume/high pressure pumps is that they are not needed in a motor with clearances under .025 and that they can cause distributor/cam gear wear from the load of the extra oil. I'm just looking at getting more oil pressure and spray onto the valvetrain than what I was getting before. I could run the motor with the valve covers off and adjust my rockers and not have to worry about oil spray all over the place. My valve relief down at the oil filter is plugged as per my engine builder's specs. Thus far, people suggest using Melling's version of the old Z-28 style oil pump.

I was just curious what the benefit is behind a double roller over and OE non roller timing chain. My other question is that some of these timing chains allow for 2 degrees advanced and 4 degrees retarded on the camshaft....what does this do? I thought that you controlled the advanced/retarded timing through rotation of the distributor.

stock pan go standard. if u spin high rpms sometimes. like anything over 5500 u can risk starving the motor of oil with a hv pump in it. if u got a bigger pan i would use a hv. i run a 7.5 qt and use a hv. 40 to 50 psi at idle and 60 psi all the way to 4000. i havent spun the motor any higher than that yet. fresh rebuild trying to give it 500 break in. and as for timiing chains the advance with the gears is because u can fine tune it. if your building a serious race engine with all serious parts and a custom cam and ur gonna spend 500 or 1k to have it on a engine dyno then u need the adjustable timing piece with a 2 piece cover. but on a street car its ur call. it does help for an easy pvc adjustment though. and for double roller vs single roller. some say double is stronger i have used it and no problems and i have used single no probs. but i well never let one of my toy cars engines get anywhere close to 10k before i rip it apart to rebuild. and i always put a new chain on a rebuild or even a cam swap. but for the past 2yrs ive stuck with a single roller on my ford motor. ive have spun that motor to a lilttle over 7k with a single roller and no probs, hit it with a 100 shot at 5k and no prob. just did a rebuild and i slapped on a new single roller cloyes hd set.. but they have been working good so i stick with it. but on my chevy i plan on using a single roller also the hd set. but its your preference. use what u know. and if u dont pull ur motor apart every 10k and plan on leaving it then slap a double roller in the added security and be done.

 

[patmckinneyracing]

Sometimes on the highway, and with a summit cam, I will spin my motor up to 8000rpm, don't ask me how fast I was going since my stock speedo was pegged.

I'm looking at high pressure/standard volume right now as a good replacement.

Another question on the timing chain. I'm going with the lunati 268 cam and I think it uses a 3 bolt cam gear. Do all of the timing chains use 3 bolts? I was looking at the cheaper ones like Comps Magnum Double Roller version for 23$ on summit and Cloyes and they look like they have 3 bolt holes in the pics. Will these work?

I clicked on the 3 bolt option on the side and all the timing chains are in the 45-50$ range.

 

[bjohn07]

all the ones ive ever changed have the 3 bolt pattern for the cam gear.

 

[79loserbluebu]

Yep they all have 3 bolt gears. I've heard good things about the Lunati 268

 

[86Cutlass383SR]

There was a big write up at Maliburacing.com about the Melling pumps.

http://www.maliburacing.com/forum/viewt ... =4&t=35654

I decided to go with a hi press stock volume Milodon pump. http://www.summitracing.com/parts/MIL-18756/

With a stock pan, yes, go stock volume. A high volume pump moves so much oil it can suck a stock capacity pan dry. Go with a hi press Z/28 style pump.

 

[patmckinneyracing]

That's the exact same one I've been looking at and am going with. Milodon seems to be the one company not supplied with melling pumps that has stuck with the thicker casting and kept it at a reasonable price.

 

[86Cutlass383SR]

The Milodon pump I got was very heavy for an oil pump and beefy as hell. It's in my engine but the engine is still on the engine stand so I can't tell what kind of pressures I'm getting but I'm not real worried about my pump at this point.