Donovan Posted September 21, 2020 Report Share Posted September 21, 2020 Curious if any E30 teams are running accusumps? Is it worth the 10pts? Running a stock M20... Quote Link to comment Share on other sites More sharing options...
wvumtnbkr Posted September 21, 2020 Report Share Posted September 21, 2020 (edited) I have worked with a couple of e30 teams over the years. As far as I know, the teams that are near the front are not running an accusump. @Huggy @E. Tyler Pedersen Edited September 21, 2020 by wvumtnbkr 1 Quote Link to comment Share on other sites More sharing options...
Technical Advisory Committee Chris Huggins Posted September 21, 2020 Technical Advisory Committee Report Share Posted September 21, 2020 Add an extra quart and send it 4 1 Quote Link to comment Share on other sites More sharing options...
enginerd Posted September 21, 2020 Report Share Posted September 21, 2020 We see brief oil pressure drops (sub 25 psi) in left hand sweepers with m20, but have never lost a bearing because of it. 2 Quote Link to comment Share on other sites More sharing options...
TimS Posted September 21, 2020 Report Share Posted September 21, 2020 With an extra quart, the trap door oil pan baffle, and a properly setup set of crank bearings (thanks @huggy ) I have had solid oil pressure. Granted I’m not at the speed of Huggy and enginerd. Quote Link to comment Share on other sites More sharing options...
Grufton Posted September 21, 2020 Report Share Posted September 21, 2020 5 minutes ago, TimS said: ...the trap door oil pan baffle... That's 25 pts right? Or is this another unpublished freebie? Quote Link to comment Share on other sites More sharing options...
wvumtnbkr Posted September 21, 2020 Report Share Posted September 21, 2020 1 minute ago, Grufton said: That's 25 pts right? Or is this another unpublished freebie? You don't need to change the entire oil pan. You can make a drop in baffle setup for material points. The material could easily be repurposed from an interior door skin or similar. 2 2 Quote Link to comment Share on other sites More sharing options...
TimS Posted September 21, 2020 Report Share Posted September 21, 2020 2 minutes ago, wvumtnbkr said: You don't need to change the entire oil pan. You can make a drop in baffle setup for material points. The material could easily be repurposed from an interior door skin or similar. What he said. Not a different oil pan Quote Link to comment Share on other sites More sharing options...
Grufton Posted September 21, 2020 Report Share Posted September 21, 2020 Uh huh, count me as a skeptic. You certainly COULD fabricate something from repurposed parts, but at $130 from Bimmerworld, I bet there are quite a few running unclaimed. Those hinges would be particularly tricky. Quote Link to comment Share on other sites More sharing options...
enginerd Posted September 21, 2020 Report Share Posted September 21, 2020 (edited) 7 minutes ago, Grufton said: Uh huh, count me as a skeptic. You certainly COULD fabricate something from repurposed parts, but at $130 from Bimmerworld, I bet there are quite a few running unclaimed. Those hinges would be particularly tricky. Our m20 oil pan baffle didn’t have hinges, just a flat plate with cutout for the pump things. Maybe that’s why we still saw low oil pressure in the corners! I always claimed a couple feet of metal in logbook which included this. We typically teched around 480 pts. Edited September 21, 2020 by enginerd Quote Link to comment Share on other sites More sharing options...
TimS Posted September 21, 2020 Report Share Posted September 21, 2020 (edited) Yep tricky for sure. Templates are available online so you don’t have to design your own or buy it from bimmerworld(May have been where I got my inspiration) . Rules state non OEM oil pan 25. Still using OEM pan. If I’m ever in impound I’ll expect the protest. Edited September 21, 2020 by TimS Quote Link to comment Share on other sites More sharing options...
ross2004 Posted September 21, 2020 Report Share Posted September 21, 2020 Don't forget your windage tray either: https://www.harrisonmotorsports.com/oil-pan-windage-tray-e30.html That can be made from re-purposed parcel shelf material. 1 2 Quote Link to comment Share on other sites More sharing options...
TimS Posted September 21, 2020 Report Share Posted September 21, 2020 Exactly. Forgot what they call that part of the E30. Thanks again for the help. Quote Link to comment Share on other sites More sharing options...
mindspin311 Posted September 21, 2020 Report Share Posted September 21, 2020 5 hours ago, Huggy said: Add an extra quart and send it That's what I told him.. Quote Link to comment Share on other sites More sharing options...
Technical Advisory Committee Andrew D Johnson Posted September 21, 2020 Technical Advisory Committee Report Share Posted September 21, 2020 6 hours ago, Donovan said: Curious if any E30 teams are running accusumps? Is it worth the 10pts? Running a stock M20... Nope, other than rocker arms the engines are nearly indestructible. YMMV Quote Link to comment Share on other sites More sharing options...
Technical Advisory Committee Chris Huggins Posted September 22, 2020 Technical Advisory Committee Report Share Posted September 22, 2020 We see oil pressure drops in left hand turns to <25 psi as well. The worst offenders are south bend at VIR-F and the carousel at VIR-S. When the bearings came out around 200 hours they weren't visibly worn whatsoever. They are currently in my street E30 which sees the limiter every time its driven. The usual rule of thumb is 10psi per 1000 rpm, but for the M20 with its large bearing surfaces apparently 5psi/1k rpm is perfectly acceptable. The worst part is trying to set a logical oil pressure alarm in the AIM that works if its ever needed but doesn't go off as a nuisance alarm... theres no "dont go off if the car is turning left" condition, haha Quote Link to comment Share on other sites More sharing options...
Technical Advisory Committee Andrew D Johnson Posted September 22, 2020 Technical Advisory Committee Report Share Posted September 22, 2020 11 minutes ago, Huggy said: We see oil pressure drops in left hand turns to <25 psi as well. The worst offenders are south bend at VIR-F and the carousel at VIR-S. When the bearings came out around 200 hours they weren't visibly worn whatsoever. They are currently in my street E30 which sees the limiter every time its driven. The usual rule of thumb is 10psi per 1000 rpm, but for the M20 with its large bearing surfaces apparently 5psi/1k rpm is perfectly acceptable. The worst part is trying to set a logical oil pressure alarm in the AIM that works if its ever needed but doesn't go off as a nuisance alarm... theres no "dont go off if the car is turning left" condition, haha In the Premium Noobs car, the oil pressure would be pegged at 0 through left hand sweepers. When hot it would idle at maybe 2 PSI as well. Somehow I don't think this ever caused a problem. 1 Quote Link to comment Share on other sites More sharing options...
Black Magic Posted September 22, 2020 Report Share Posted September 22, 2020 39 minutes ago, Huggy said: We see oil pressure drops in left hand turns to <25 psi as well. The worst offenders are south bend at VIR-F and the carousel at VIR-S. When the bearings came out around 200 hours they weren't visibly worn whatsoever. They are currently in my street E30 which sees the limiter every time its driven. The usual rule of thumb is 10psi per 1000 rpm, but for the M20 with its large bearing surfaces apparently 5psi/1k rpm is perfectly acceptable. The worst part is trying to set a logical oil pressure alarm in the AIM that works if its ever needed but doesn't go off as a nuisance alarm... theres no "dont go off if the car is turning left" condition, haha FWIW I have heard of guys using mechanical filtering of the signal to help with this. Basically a restrictor with a tiny accumulator or section of low stiffness hose and sensor after it. The sensed pressure would degrade slowly and you would only get an alarm after a longer period of oil pressure being low. I would hope a one shot glass accumulator would not be valued as an accusump and instead a sensor...but I guess who knows. Could electrically delay the signal change as well. Quote Link to comment Share on other sites More sharing options...
enginerd Posted September 22, 2020 Report Share Posted September 22, 2020 1 hour ago, red0 said: In the Premium Noobs car, the oil pressure would be pegged at 0 through left hand sweepers. When hot it would idle at maybe 2 PSI as well. Somehow I don't think this ever caused a problem. @red0 is always prone to hyperbole, however, since the only times I look at gauges while racing are when leaving and entering pit lane, I can’t contest the claim on left hand sweeper oil pressure. Hot idle was more like 5-10 psi. Quote Link to comment Share on other sites More sharing options...
Technical Advisory Committee Andrew D Johnson Posted September 22, 2020 Technical Advisory Committee Report Share Posted September 22, 2020 (edited) 32 minutes ago, enginerd said: @red0 is always prone to hyperbole, however, since the only times I look at gauges while racing are when leaving and entering pit lane, I can’t contest the claim on left hand sweeper oil pressure. Hot idle was more like 5-10 psi. I'm pretty sure after a hard 2 hours it was under 5 PSI. Edited September 22, 2020 by red0 Quote Link to comment Share on other sites More sharing options...
Donovan Posted September 22, 2020 Author Report Share Posted September 22, 2020 Thanks to everyone for all the information! Really appreciate your expertise Quote Link to comment Share on other sites More sharing options...
Administrators E. Tyler Pedersen Posted September 22, 2020 Administrators Report Share Posted September 22, 2020 At Charlotte going on to the ROVAL we were seeing 6 to 8 psi on some occasions. At Indy we saw a flashing red on the dash for oil pressure, but I haven't pulled the data to see what that psi numbers were At Gingerman we saw again the flashing red on the dash and I think it went down to 15 or so going around 10b. When those happen, then I make sure we put more oil in at the pit stops. 2 Quote Link to comment Share on other sites More sharing options...
mender Posted September 23, 2020 Report Share Posted September 23, 2020 (edited) I use a Hobbs switch set at 30 psi to trigger a large red shift light in the Fiero and with a baffled pan and one extra quart it never actuates. Video shows no drop in the corners. Trap doors are easy, use sections of piano hinge welded to the flaps. I pull the hinge pin out after cutting the hinge to length and substitute a smaller diameter rod with extra length on both ends and bend the ends at 90 degrees to each other as stops. If it rattles when you shake the pan, you're good. Edited September 23, 2020 by mender Quote Link to comment Share on other sites More sharing options...
enginerd Posted September 23, 2020 Report Share Posted September 23, 2020 (edited) 21 minutes ago, mender said: I use a Hobbs switch set at 30 psi to trigger a large red shift light in the Fiero and with a baffled pan and one extra quart it never actuates. Video shows no drop in the corners. Trap doors are easy, use sections of piano hinge welded to the flaps. I pull the hinge pin out after cutting the hinge to length and substitute a smaller diameter rod with extra length on both ends and bend the ends at 90 degrees to each other as stops. If it rattles when you shake the pan, you're good. I think only bentleys come with a grand piano dealer-installed option... so for the rest of us who can’t repurpose one, how many points is a length of piano hinge? Edited September 23, 2020 by enginerd 4 Quote Link to comment Share on other sites More sharing options...
mender Posted September 23, 2020 Report Share Posted September 23, 2020 1 minute ago, enginerd said: I think only bentleys come with a grand piano dealer-installed option... how many points is a length of piano hinge? 1" wide by 12" long = 2 points. Quote Link to comment Share on other sites More sharing options...
.thumb.png.194f012d1a96258f0fa97d45165dfd96.png)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.