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Member Since 24 Apr 2015
Offline Last Active Yesterday, 01:05 PM

Posts I've Made

In Topic: Oil pressure on Z20 engine?

Yesterday, 01:05 PM

LOL yep 10 psi will buy you a 1/4 second or so.  Who cares?  The real point is to get off load when the light comes on and shut down ASAP.  On a street car you have a LOT more time than a race car.  


We peak at 85 psi on the race motor- 45 to 55 at idle (don't honestly remember).  I've read too many folks damaging oil pump gears running 100+ at speed.  I don't run an oil warning light.  It might scare the driver away from setting a record.   :thumbup:   

I'd rather spend the extra money on coated bearings and pistons and better oil to prevent damage than a 1/2 second dummy light.  

In Topic: Oil pressure on Z20 engine?

Yesterday, 11:32 AM

Mike, the warning light just gives you time to shut the motor down before you lose a rod through the block.  How many motors run at 7 psi???  None.  You either run out of oil pressure or you have oil pressure.  Who cares if its 5 psi or 10 psi or 15 psi?  Either way, its essentially the same margin of safety.  If you're going 60 mph when you lose oil pressure, we're talking semantics.  

In Topic: 78 620, L20B foreign matter in combustion chamber.

Yesterday, 06:36 AM

Lean out your idle mixture.  

In Topic: 78 620, L20B foreign matter in combustion chamber.

14 December 2017 - 11:17 AM

That's exactly what a rich mixture will do.  You'll start dropping cylinders.  

In Topic: Can you use a L18 distributor on a Z24?

14 December 2017 - 11:16 AM

Yes.  As Stoffgren says you need the assembly from the donor motor - distributor, plate, pedestal and set the timing to the specs from the donor using the intake side spark plugs.  

Basically treat it like an early motor and the spare plugs become just plugs, not spark plugs.  Wire it in with one 3 Ohm coil, or a 1.5 Ohm ballast with a 1.5 Ohms coil if you're using points.