I've deleted the squirters and have an AMS type sump with the big oil guard bolted under the crank. So I've always wondered so now how does oil get up to the rings?

 

Why delete squirters? Oil doesn't get onto the rings anymore as efficiently that's what they were for..like the airtrek 4g63 without them leads to less lubrication and cooling and earlier ring wear.

 

it slings around everywhere.

 

They generally don't come on the 4g64 blocks, and most people don't go through the effort of putting them in as there are some big names that attribute them to 'crank walk'. It is also another potential point of failure.

I was literally thinking about this a few days ago, and I saw this thread.

Does anyone have examples of cars not running squirters and doing fine around a circuit/tarmac rally?

 

There's zero evidence of this, how can they lead to crank walk? I'd rather have my pistons lubricated and cooled better than a super small chance of some supposed failure after many, many miles if at..

Mitsubishi engineers put these in because they found the benefits outweigh the risks of any potential failure, same with the balance shaft. Any big names that make these claims need to provide some proof or make a write up so that there can be links that can be shared..I forget who it was but after the balance shaft delete frenzy I think Jack's transmission came out and expressed their apologies for doing this mod on so many cars. They admitted this caused more harm with engine harmonics being off after the delete, caused catastrophic engine failure in many 4g63s..

 

Here's the link https://www.magnusmotorsports.com/crankwalk-theory/

I don't discount the engineers work, I also acknowledge that some of their goals maybe different to someone modifying their cars 20 years after they rolled off a production line. If it gives you some insight into my views, I still run factory injectors because I appreciate the work the engineers did however, I also recognise that like most things in life, they have their pro's and con's.

Removing any 'unnecessary' oil outlet gives less chance of loosing oil pressure and maintaining flow... at least I would think, others may also have this view.

Is it worth taking oil squirters out for? No idea, is it worth putting oil squirters in for? no idea. I am interested in hearing yours and other's views.

 

squirters have been done to death on here in other threads, i researched on here and there are lots of opinions. when I had my engine built the builder said they are not necessary for forged pistons like CP, I also read that builders can bend them slightly with installing new pistons which can lead to failure later and I didnt want to risk this along with the balancer belt breaking. I have had no issues because of my high oil pressure. My questions still stands regarding how does oil get to the rings when I have the large crank oil guard which would stop a lot of oil coming up to the bore.

 

It's spraying out the the side clearance of the connecting rods and getting flung around everywhere.

 

Really Odd being I had squirters put on my 2.4 engine and they are also going on my 2.2. 2 totally different blocks that I paid for the machining. Balance shafts being removed was something they did way back when in the old dsm days. That was nothing new. It was AMS that came out with those race balance shafts that honestly are pretty useless. Crankwalk wasn't lack of oil it was due to poorly designed thrust bearing design. That and to much play in the 95 and 96 dsm 7 bolts. When they went to the 2 piece thrust bearing and changed clearances i.e 97- current 7 bolts that problem went away. How come you never saw a 6 bolt block crank walk. Better design different way of building it.

 

Do they get enough oil to go around a track in a 20 minute session without the squirters?

 

They weren't designed to have heavy track days why they were in nt cars. Thats also why you pay to have squirters put into the 2.4 blocks.

 

As @letsgetthisdone said, cylinder walls are lubricated by the oil coming out between the big end of the con rod and the rod journal on the crank. The crankshaft hits the oil as it drops off, essentially turning it into a mist.

For a circuit car you absolutely want them, regardless of how nice your pistons are. I've done dyno testing on the OEM level (multimillion dollar testing equipment) and have seen piston core temps (temperature of the actual piston as it runs) up to 50F lower using squirters versus identical engines without squirters.

 

50* is a number. Were the engines that didn't have squirters seeing critical piston temps? Also, were these emission's optimized tunes, or were they power/safety/heat optimized tunes? The tune makes a big difference, and to conform with emissions standards OEM stuff is usually on the absolute bleeding edge of things staying together. Especially vs an evo track car that is running E85, a nice cool 11.0:1 AFR, and extra-medium timing.

My car has seen multiple track days without squirters, and i have multiple ~900whp cars running around. Two of which do lots of drag racing and 1/2 mile events. Deleted squirters hasn't been an issue. English Racing has hadn't any issues with it either, and they delete them on everything.

 

Yes, these were OEM engines, running prototype calibrations so I can't speak on what they were optimized to. There are certainly engines that run without squirters but if you look at basically every engine in GTD and GTLM racecars they all use squirters. It's a small feature that brings plenty of benefits.

 

Again though, that's a piston optimized to have a squirter. So, knowing that it will run cooler, it's built lighter, and the inside of the crown is designed so that the oil hitting it from the squirter does something useful. If you look at say, a Wiseco HD piston for a 4g, there's not a lot of meaningful surface for an oil stream to hit.

Also, bending the squirters, they almost always end up just breaking.