So, school me on roller cams in big blocks. Do we need oil restrictors and what is the preferred method? I just bought my first roller cam and need to learn the basics.
Thank you in advance!
Thank you in advance!
Do Roller Cams in Big Blocks Need Oil Restrictors for the Lifters?
- Thread starter 71GSSDemon
- Start date
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I see the Indy heads with external lines talked about, but they are different.
I can't find a single word on the Google about needing to restrict lifter oiling when running a solid roller cam in a big block. Lots of GM talk and some Small Block Mopar talk.
If this is necessary and someone knows for sure, please let me know! I do have an email into Herbert Racing Cams and Isky in regards to the solid roller lifters they each sell.
Kendog 170
Let the boy go !
Curious
ValiantS
Well-Known Member
Lots of things to look out for with doing a roller cam upgrade...The lifter area is usually a massive oil leak and the only way I'd 'restrict' oil is having the bores bushed/indexed using a bushing with an oiling orifice. Assuming that's not going to be in your budget, it still answers your question. If the cam you have has a groove on the rocker feed journal you might restrict the block at the deck but that all 'depends'. It'd be easier to answer your specific questions then to conceptualize many scenarios. But I will add that it'd be a good idea to tailor the lifter to the application!!!
Thanks for the info. If there is machine work needed, then the cam will wait for the 400 engine build and that can be done with the rest of the machining. If it wasn't needed, I would lean towards using it in the 383 I have, but it is complete and will be used for now for testing the new car build.
@Bighead440 knows about this kinda stuff if he has time to post.
vitamindart
Well-Known Member
I have run a few roller cams in big blocks, never did any mods to the engine to run them.
I have also run a hydraulic roller with no changes. A quick search on solid rollers seems to indicate that it would be fine, as long as the lifter doesn't have a groove that could be exposed at high lift.
TT5.9mag
Two atmospheres are better than one
@71GSSDemon I think you need to clarify a bit. This conversation is specifically about solid roller cams in big blocks and what to do with oiling to the lifters when running one. In small blocks you either tube the lifter galleys or bush bores in the block to turn off (most of) the oil to the lifters. Are the methods the same in a big block?
Yes, thanks. SOLID ROLLER CAMS. Is an oil restriction needed? What is the preferred process? Same as Small Block? Bush lifter Bores? Solid body lifters?
Not sure, I have emails into Isky, Herbert and BAM.
Here is the answer I just got from BAM
Hi Eric,
Thanks for your interest in BAM Lifters!
We’ve had the privilege of being part of several land speed record engines over the years.
Our PN 2016-16 series is engineered for the 383 BB Mopar. This lifter is designed to run without lifter bore sleeves under standard conditions. However, for high-performance or extreme applications where precise oil control is essential, sleeving the lifter bores may be beneficial. The lifter bodies will measure Ø0.9035" ±0.0002". We also have a limited number of oversized lifter bodies that measure 0.9050".
The 2016-16 is ported to supply pressurized oil directly to the wheel bearing, which enhances durability and performance—whether using the standard needle roller bearings or upgrading to one of our bushing bearing options.
We offer two bushing types:
- BB4 Bronze Bushings PN 2016-16BB4
- BB1 Steel with DLC Coating PN 2016-16BB1
The 2016-16 also includes pushrod oiling capability, which can be disabled if not needed.
BAM Lifters are sold wholesale directly to professional engine builders and machine shops (i.e. refer your builder to us, or we can direct you to one of ours) or can be purchased at BAM Racing Lifters
Best regards,
Brad
BAM Lifters / SRI Performance
We use DLC coatings, similar to BB1 above, on wrist pins at work. It is amazing!
jos51700
Green Bearing thread connoisseur
Am I blind or did they not address the oil restriction?
33IMP
Well-Known Member
MY opinion only!
Not if you buy roller lifters with solid bodies. (No oiling band)
Crowers solid rollers in mine. 1962 max block. No mods.
Not if you buy roller lifters with solid bodies. (No oiling band)
Crowers solid rollers in mine. 1962 max block. No mods.
This is my assumption as well, but I replied back to BAM and asked more clearly.
TT5.9mag
Two atmospheres are better than one
They did but only briefly. They said,
“This lifter is designed to run without lifter bore sleeves under standard conditions. However, for high-performance or extreme applications where precise oil control is essential, sleeving the lifter bores may be beneficial.”
They referenced sleeves (bushing the lifter bores) to be used as the method of oil control.
TT5.9mag
Two atmospheres are better than one
It’s a fair assumption and why BAM provided the size and clearance of their lifter bodies. To give an idea how much leakage there will be if used without any other method of oil control.
Yeah I wondered if that's what they meant. Sounds like it's totally unnecessary, though.
Seems it is set up specific. My case os looking at Bonneville, so near WOT for up to 5 miles. Oil control may be a concern more than a street strip or full strip unless a realy quick car with rpm
That's entirely possible. I think the last thing you need is an empty pan. Speaking of that, I wonder if a dry sump system would be any benefit?
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