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MikeDanger · Joined: 21 Nov 2002 Posts: 770 Location: Denver

I did an oil change recently, with 5w50 castrol edge, and the engine runs pretty good on it, never get a low oil pressure light, and idles just under 2 bar. But the valvetrain is a bit noisy, and I picked up a bottle of Redline 20w50, im planning to add. Id rather not drain any oil. (it leaks enough!) right now after sitting for a few days the dipstick reads right in the middle. Would it be safe to add 1qt to that?
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It was either this or a giant box of legos

924RACR · Posted: Sat Nov 07, 2020 9:59 pm Post subject:

No, that's only 1/2 qt low...
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

Mike9311 · Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish

Just want to add. I run 5W50 Castrol Syntec on the '82. The local autoparts store had a 'dump" sale on the rest of their Syntec for less that $3 a quart a few years back

I bought'em out

This is pre Edge syntec and I now have a good few years left of supply for the '82

Car runs great on it and pressure is good as well. Will eventually take a look at the camshaft for giggles. It was a good, no wear, matched tappet/lobe pull from an AMC head
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car

Carrera RSR · Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK

Valve train will remain noisy regardless of oil.....
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252

Fasteddie313 · Joined: 29 Sep 2013 Posts: 2596 Location: MI

AMC cam the same profile?
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80 Turbo - Slightly Modified

Mike9311 · Joined: 14 Dec 2004 Posts: 1678 Location: Chicago-ish

I believe so but I am not sure. There was a thread on this and somebody of forum past answered the question if memory serves but I don't have that archived.

We the car was purchased, the PO either acquired it in poor shape of at least attempted a partial restore. The engine was decent except the cam/tappets. Rear lobes were practically squared off

The AMC head I had on the shelf had a good cam and tappets so it was thrown in to get the car going. It remains
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1980 931 since 1989
1981 Ideola 931 Club Sport
1982 931 Entwicklungsfahrzeug
1979 924 NA ohne 650 mit 471
1982 931 Red Resurrection - 951 IC
1982 931 parts car / resurrection?
1980 924 NA (R&D lightweight)
1982 931 wana-be GTR race car