Stock Eliminator big-block Mopars... 426 Hemi, 426 MW, 440 6BBL... wondering how many RPM those things get turned given the relatively unsophisticated oil system using factory-type pans

Matt Rover's B/SA 440-6 Challenger... met Matt at MIR many years ago and got to chat with him at length about the car... which was still red at the time

i'm going to wildly guess they wind 'em up to around 7-7500, maybe 7800.
lots of tricks they won't tell about, but i'm sure they have extra engines about, and regularly pull the engines used after each event and go through them.
there are lots of ways to modify the oiling system, and i'll bet they have "secret" tricks for that as well.
i'm not an engine expert by any stretch of the imagination, but this is just my WAG.
it will be interesting to hear from the real engine experts on this topic.

i would say the Max wedge cars maybe a little higher, but the later engines with one carb, i would bet lower.
Im willing to say 7000 ? theres always ways around the oiling system, i would say its the heads that limit the rpm more than anything else

But then again , i never ran a stocker so i dont know???

I think it depends on the guy. Some racers run steep gears and wind their engines to the moon since that is what they think works the best. Others go with different gears and converters and go thru the lights at a lower engine speed. I think they argue about it in the pits after each race! I only know one guy who races stock eliminator and he goes thru the lights around 7200 rpm. The engine is done at roughly 6800 but they always twist them a little past peak.

Only two ways to make NA power. Bigger or higher. I know some of the FAST wedge cars are right at 8000 in the lights.

You do see that car doesn’t have a stock replacement pan……right?
(Edit- oops!! I guess that’s the trans pan hanging down on that one. But I have seen numerous deep pans on stockers)

That rule seems to get overlooked often.

Accusumps are legal.

In decent air my 383 would turn 7k thru the lights.
Zero oil system mods other than the HP spring in the old used factory oil pump.
80psi going down the track.
5qt system.

Since there is horseoower in less oil moving through the motor, you can bet they have scienced out rhe tightest bearing/lightest viscosity oul combo rhat will live . The hemi stock high volume pump is probably overkill? So knowing rhat, rpm can orobably be quite high, especialy with an accusunp allowed, which is used to keep feeding the motor when the pan gets emptied? Not sure if that is what some guys are up to, but i would bet money on it.

That’s my thoughts on my 340 70 Duster, using an accusump and later rear sump magnum pan and no filter. Now that we can use solid lifters I’m expecting high RPMs depending on springs. I’ve talked to a long time racer and he said the AVS peters out about 1000 RPM less than the TQ. So carbs has a lot to do with how high.

NHRA has a long list of legal replacement oil pans. Most of them are from Moroso and Milodon as well as other aftermarket vendors. Some of them are fairly trick. I believe that the 6 qt Hemi pan is legal for any BB Mopar in stock eliminator. I think internal mods are legal so the windage tray, scraper, extended baffles etc. should all be legal.

Regarding Mopar only - none of the available accepted oil pans are any deeper than a 7 quart Hemi pan.

And no production oil pump was ever a high volume pump. Higher pressure but not high volume.

I like and use the narrow full groove mani bearings and HP {rod bearings, Clevite, Speed Pro, and Mahle depending on what I have in stock or I can order and get in a decent time frame, (not more than ten days) with .0025+ oil clearances on the rod bearings an .003+ on the mains This on race only or street, street and strip motors, on any and all motor that will make more than 500 HP
Crank scrapers hand made with no more .060 physical clearances to all of the rotating parts. Steel rod motors have work well with as little as .030 clearances, I'm not sure what is needed on aluminum rod motors yet, I don't do those motors normally
High volume pump set up to have ten pounds of oil pressure per 1000 RPM, IE shift it at 6500 and set the pressure at 65 Lbs. with hot oil (150F+) at and above 1500 RPM Valvoline nonsynthetic petroleum based 5W20Wt oil on street motors and Valvoline VR1 10x30 race oil on all other motors: up:
II like and use the Mopar stock type 1970/1971 6 quart stock low sump oil pan, works good, lives a long time
On shifting RPM I found that shifting the six pack motors, no matter what C.I. or build details 5500 to 5700 RPM work the best, single four barrel motors liked to be shifted between 6400 up to 6600 RPM on my motors and testing different shift points at the tracks

Mine is nothing crazy but turns a bit of rpm. Shifting at 7,750. Milodon 31580 pan. Royal purple 5w-30 XPR. 6.5qts. And it has a vacuum pump if that matters. Light blue line is oil pressure.

I managed to dig up a couple of data points off an older Speed Talk thread for A/SA and B/SA Hemi cars that Larry Meaux provided
- the A/SA B-body made 650 HP at 7000
- the B/SA E-body made 640 HP at 6900

No mention of shift RPM or what they were turning in the traps, though

Larry Hill told me his 440-6 'Cuda would spin about 7200 thru the traps on it's best passes