oil squirters question
 

Are oil squirter's really necessary? I was going to bore a 2.2L to 90mm without installing oil squirter's. Is this a mistake? The 2.2L ran great with no overheating of the pistons. (ran it hard but only a street car) and will stay a street car.

Answering this is a toss up depending on who you ask. The question aside from heat rejection is if the nickel silicon carbide coating requires the extra oil to maintain proper lubrication. There are some that consider this a 'myth' and nickies will do just fine w/o squirters. Your 2.2 are biral and have a cast iron bore. The 2.7s (90 mm) will be nickies... 5 micron silicon carbide particles in a 'glue' of nickel. Avoid acid forming fuel additives... so no nitromethane and no high sulfur fuel (thus no diesels till just now). Other than that propane, ethanol, leaded, you name it.

I've never asked the plating people (US chrome or Millenium) directly. Might ask Charles at LN Engineering as that is his expertiese.

Bottom line... why not add them. It isnt that much $$ and you'll want the additional heat rejection. It cant hurt.

tadd

squirters
 

I understsand that the clearences are setup based on the fact they have them, piston cooling etc.. all benifit from them as well. almost all 911 engines have them except for the early lower HP 2.0 and 2.2

Mike Bruns

Popped an email to millineum. They said you can run nikasil on 'splash only' lubrication but he said forced lube is best. They also mentioned tat the actual plating process has evolved greatly since the 70s, so what might have been necessary might not be as critical.

tadd

Oil squirters are there primarily to cool the pistons and control thermal expansion. One needs more piston-to-cylinder wall clearance to run without them to prevent piston scuffing when hot.

Thanks to all. I was thinking with the crank in line with the pistons oil splash would be high.

There will be no oil splash from the crank since it is a dry sump.

squirters
 

What they mean is all the oil leaving the rod and main brgs. gets slung around.
Mike Bruns