High rpm big block filtration question...

Status
Not open for further replies.
J

JimG

Joined
Sep 1, 2004
Messages
93
Location
Dickinson, TEXAS
I have a question about oil filters, (I've searched this forum, and cannot find the answer).

My application is somewhat specialized. My buddies and I all run 509 cubic inch (and larger) big block chevies in offshore-type performance boats.

Some are carbed, some are injected.

We run rpms of 5300+ rpm for extended periods.

We all use dino oils.

We all use OCI's of 20 hours, never more. Sometimes less, if we run a Poker Run.

Most have K&N type CG approved flame arrestors/filters, so we are filtering air.

Oil temps of 210 to 220 while running.

We rebuild at 300-400 hours, top ends at 100 hours.

Some of us are running M1 filters, some are running Mercury Racing filters, some are running HP Fram Racing filters (not PH car-stuff).

Here's the question(s), (thanks for bearing with me...)

What is more important IN MY APPLICATION, flow or filtration?

What filter best suits this application? I've heard the K&N flows very well...

Thanks!

JimG
 
Jim, I think with your tear down rate ...any quality filter would do. If you want, the filters in Grease's study that show the most flow @ 10 and 20 psi applied pressure will have the least impact upon any potential flow alterations. Fine filtration probably isn't something that you need concern yourself with. The engine is torn down before most are even done shedding manufacturing left overs.
 
Now that is what I was looking for! Thanks Gary!

I'll probably switch to the K&N.

And thanks to everyone who responded...

Jim
 
Sounds like you guys have alot of fun out on the water with toys like that!!! Makes my lil SBC sound weak. I've got a Permacool remote mount in my engine compartment and I used the Wix 51773 oil filter. It's a huge filter for Ford 460ci V8's and hold a little over a quart of oil itself. My old engine setup consisted of a fully forged Lunati setup 4bolt main 350 block bored .60" to 360ci.
AFR 195cc Heads
Solid Roller 257/269 .493/.512 112LSA Cam
Corsa 3.5" Marine Headers
150wet NOS kit

Engine revved to 7000rpms and propelled the 22' Hammond Challenger 89-91 mph on my Gaffrig gauges. I used to give the big block guys all they wanted at my local lake. Setup ran great using this filter for 614hrs. At that time my forged Lunati crank broke in half that summer. Luckily I was only around 2500rpms when it happended or else I would have been looking at a new block.
 
In reference to the dual filter....your pressure will not be affected.....then you can easily relocate your filter(s) to a more convenient location that allows for larger capacity filters...just a suggestion.....if not....I agree with one of the other fine posters....with the rebuilds (I'm with you on that...I have had my heads off 4-5 times and only have 5000 miles on my LS1:))..anyway...with the amount of maintenance you are performing a good WIX/KN/Amsoil filter will do fine.....
 
Ryan00TJ, wow that's one fast Hammond! Those are very nice boats, and it sounds like yours is powered right...

I also own a 1970 Donzi 18 with a Holman Moody 351W. Those smaller boats are a hoot at speed, though mine's a lot slower than yours.

And even with 600+ hp in my TBred, I can only see 80-82mph.

Thanks for your reply...

Jim
 
I'll comment on what I know. This won't answer your question. Others will be able to do that.

The frams are the same junk on the inside. The last HP4 I cut open still has cardboad junk inside. This was a weekend bracket racer (made it to some regional money run) and had the block bypass defeated. No problems were apparent with the media. It stayed intact with no bypass with a 7500 redline. This was a small block.

If room permits, I would recommend using a dual mount and any velocity flow issues are cut in half.

Baldwin makes HP-like filters ...as does WIX ..but I've never seen the insides of either. Unless you have some unreal oil pressure, I never quite figured out the heavy can issue ..but with expensive engines ..why not
dunno.gif
?

Do you use high pressure/standard volume oil pumps or high volume oil pumps?

What is your pressure relief? What is your operating oil pressure? Unless you're in pressure relief ..all filters flow identically ..without variation. Only the fractional hp to run the pump will vary.
 
Thanks for your reply! It's standard oil pump, don't know about the pressure relief. My oil pressure is 60 running and 25 at idle.
 
quote:
I'd slap a Perma Cool Oil filter relocation kit on there (get the dual filter steup.....cost about $100 bucks...and run dual (larger filters)....
Click to expand...
So you are saying more flow? I don't really want to add hardware to my engine compartment if I don't have to. What single filter would you run?
 
So you are saying more flow?


The flow should be the same. The velocity will be reduced. You aren't in a high volume situation. Your pressure is within standard passenger car levels. I don't see any need for the heavy can filters (others may).

Is your cold pressure higher than 60 psi? If not ..then this is probably (integrated for point of reference) your pressure relief. When in relief, your flow to the engine can vary depending on the pressure drop across the media. If you aren't in pressure relief, then the media has no impact upon flow and merely elevates upstream pressure.


Do you have room for a longer filter?? How much?

Here's the bigger chevy filter.

-


Part Number: 51794
UPC Number: 765809517943
Principal Application: Chevrolet and GMC Trucks (73-93)
All Applications
Style: Spin-On Lube Filter
Service: Lube
Type: Full Flow
Media: Paper
Height: 7.822
Outer Diameter Top: 3.674
Outer Diameter Bottom: Closed
Thread Size: 13/16-16
By-Pass Valve Setting-PSI: None

Gasket Diameters
Number O.D. I.D. Thk.
15267 3.444 3.100 0.260
 
Ok, thanks for all your replies! What I'm looking for is this: Of the standard size, single filters we're using (Merc Racing, Fram HP, M1-302, K&N) which is best for our engines? I know the Merc flows really good. Should I be looking for flow or filtration?
 
Non-restrictive flow, synthetic media, "extended" "heavy-duty service" are the key words. As in BALDWIN HPG (High Performance Glass); DONALDSON P169071 (see type and reference for application); FLEETGUARD (HD Diesel) Micropore [?].

Keeping sump (a large one) at a constant temp would concern me more than in running extra filters (but overkill is well-accepted around here).

Good luck.
 
AC PF35L

http://www.gmgoodwrench.com/perfpartsjsp/partlist.jsp?cat=9366§ion=ep


25013454 Synthetic Oil Filter


The PF-35L heavy-duty spin-on oil filter can replace any PF-25 or PF-35 filter on 1968-90 Chevrolet V8 engines. It has a 100% synthetic element that is rated at 12 microns. Its synthetic glass filter media provides finer filtration than conventional cellulose (paper) filters. The individual strands of synthetic glass used in the PF35L are smaller and more consistent in size than cellulose fibers. These glass fibers are supported by a polyester sheet laminated on both sides, and the pleated synthetic filter element is backed by a metal screen. This extremely efficient filter can reduce engine wear by 75% compared to conventional filters without restricting the flow of oil.

Technical Notes: PF35L filters can be used in many competition oil systems with remote-mounted filters.


MAT
 
Status
Not open for further replies.

Similar threads

TominKY
performance marine filter application
2
Replies
23
Views
422
TominKY
Hohn
Oil Filter Relocation for convenience and performance
2 3
Replies
46
Views
3K
Donald
2
Aviation Oil Filters Tested ~ 40% efficiency at 20 microns?
Replies
12
Views
1K
ZeeOSix
RevRider
K&N 171 - Forum Article in Response To Their Oil Filter Performance For Harley’s
2
Replies
35
Views
8K
johnmyster
J
Metal Fiber Filter Medium
2
Replies
38
Views
3K
RalphPWood
Back
Top Bottom