Oil squirters. Required, or dead weight?

[marc_scirocco@yahoo.ca (Marc scirocco Québec)]

This is funny. You are right about the cooling effect
of the oil squirters.

The thing is that the oil squirters are not supposed
to rub upon anything, period.

If they do rub, FIX THE ORIGINAL PROBLEM!!! Do not try
to go around the original problem, by removing the
squirters!!!

There is a problem, so find it, and fix it, and keep
the squirters.

Measure, measure, measure, blueprint, blusprint,
blueprint. You are almost there, so get it. I am sure
it is something simple that was overlooked.

Cheers.

Marc

 --- Dan Bubb <jdbubb@ix.netcom.com> a écrit : > Josh:
> As Larry pointed out the purpose of the oil
> squirters is to cool the
> pistons, NOT lubrication.
> A cooler piston allows higher compression without
> detonation.
> So, depending on what compression ratio you're
> running or if you're running
> with a turbo or supercharger the oil squirters could
> be a big help.
> If you're running stock compression with no boost
> and can always get good
> gas then they may not be necessary.
> Also, note that the need to suppress detonation is
> greatest around the
> torque peak (where cylinder pressures are highest),
> not at super high RPM,
> so it's a CR related issue, not RPM related.
> Recent article in RaceTech magazine about the Audi
> R8 engine mentions that
> they improved the water circulation in the cylinder
> head and as a result the
> combustion chamber ran cooler and they were able to
> delete one of the oil
> squirters under each piston.
> Just a little info so you all know it's not just
> opinion.
> Dan
> 
> 
> ----- Original Message -----
> From: <joshhignight@techography.net>
> To: Scirocco List <scirocco-l@scirocco.org>
> Sent: Saturday, July 20, 2002 9:49 PM
> Subject: Oil squirters. Required, or dead weight?
> 
> 
>    I am in the middle of a dilemna. My beasty block
> has been cursed with
> problem after problem. First, I find the pistons are
> facing the wrong
> direction (it's a 16v, relief cuts for intake valves
> were installed facing
> the exhuast valves). Open bottom end, rods are on
> backwards too (bumps on
> rods are not facing cambelt side of block, going
> against Bentley note). Pull
> rod caps, crank, rotate pistons and rods,
> reassemble. Turn crank... thunk
> (contact). Searching reveals that the oil squirts
> are contacting the now
> correctly installed rods.
> 
> So, do I pull the oil squirters and just live with
> it? Do I go through the
> hassle of not having my car for how many more weeks
> to have things corrected
> (the shop is not local, by 900 miles)? If the block
> will have no adverse
> effects from not having the squirters installed,
> I'll run it like that. I
> plan to hit 8K rpm with it and it's running 83mm
> forged pistons and 2L crank
> and rods (was a stock 1.8 16v block).
> 
> Any and all input are welcome.
> 
> Joshua
> 
> 
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