What's required to put an F oil cooler on an E engine?

[gsJack]

Have you ever seen an engine with round vacuum diaphragms at the end of the snorkels? Their function is to do just the opposite of your statement above..that's all I was getting at.

I've seen those but don't forget the heat risers valves also used on cars back then that redirected the exhaust gases to heat the intake manafolds to heat the incoming air/fuel mix until the engine warmed and the riser valves opened.

[cHa0s]

The German guys made it by using an adapter and external filter.
http://gs-500.info/index.php?title=Montage_eines_%C3%96lk%C3%BChlers
They use a cooled GS for racing, works fine.

[gsJack]

The German guys made it by using an adapter and external filter.
http://gs-500.info/index.php?title=Montage_eines_%C3%96lk%C3%BChlers
They use a cooled GS for racing, works fine.

I don't understand German but that looks like the one Jim Knoff showed recently, sells for $275 shipped as I recall.  When I started riding back in the 80's almost all bikes were air cooled and oil coolers like that were very popular and aftermarket one's from Lockhart and Deraille were available for most popular models at reasonable prices.

My 82 CB750K was the hottest running bike I ever had and I was not a very experienced rider then, it started crapping out early due to overheating.  Got very hot when bogged down in traffic on hot summer days and also got very hot creeping along too slowly on a hot day due to reduced cooling air flow.  I ended up putting a Lockhart oil cooler on it and got another good year out of it before I gave up on it.

The 2 GS500s I've put many years and miles on were/are the coolest running bikes I've had and the 2 air cooled 4 cylinder Hondas the hottest.  I've never felt the need for an oil cooler on the GSs.  I'd suggest anyone considering adding an oil cooler to a naked GS500 for normal street use should monitor their oil temp under their personal usage before adding one.  A too cool running engine can be as bad as one that's too hot.  I have no experience with racing a GS but have run my stock ones thru the mountain twisties holding 7-9k rpm for hours and they stay cool.  Never a problem in summer traffic either.

[crzydood17]

UHMMM! I have a degree in high performance engine and chassis fabrication from Wyotech! Lemme get in on some of this!

1. The colder the intake charge the more dense the O2 the more fuel can be added to make the correct F/A ratio and thus the bigger the bang. That is why CAI and CO2/Nitrous sprayers for intercoolers exist.

2. The hotter the engine the better. An engine makes its power not by gasoline or o2 expanding. It makes its power by heating up the nitrogen in the air (80% of air generally) and that causes it to expand and push the piston down. The more heat the more expansion the more power. That is why high compression ratios that cause faster burns and hotter temps make more power. Coatings have been developed to make the cylinder keep as much heat as possible inside of it. The more heat it can keep from the burn the more power it will make. As most know almost all of the power of the engine (the heat) gets pushed out of the exhaust. Turbos help with this because they use the wasted power to push more air into the engine and keep the cycle going.

3. Heat is bad for emissions though. At some point NOx starts to form (nitrogen burns at around 2000 degrees or so). So they cool the engine down with water cooling to prevent this.

4. The reason carbs needed the tube coming off the headers was because the fuel had to go from the carb down the long intake runners and into the cylinders. This was hard when the engine was cold because the fuel would condense on the sides of the intake runners. This caused a lot of inefficiency and hard starts. With the advent of direct port and direct injection there is no need for this and the intake charge can be whatever temperature.

If there is something I did not cover here let me know. 

[BockinBboy]

^^Hmm, I find this interesting enough... Can you comment on engine overheating?   

- Bboy

[crzydood17]

engines over heat because we design the lubrication system to a set of specification and that set of specification is determined by the engines use cooling (water/oil and air). That is normaly designed inside of the heat range of cheap oil products.

If you overheat an engine your expanding everything too much, metal starts to weaken and clearances start to warp. Also at super high temps cheap and weak oil starts to break down.

If you ever watch a top fuel dragster, they make so much heat that its not unburnt fuel coming out of the exhaust that makes the flame... they are literally setting the air on fire (remember the whole nitrogen burns thing). Remember we want the heat to stay inside of the cylinder and most of it does (or goes out the exhaust). That's where the awesome coatings come in! If you put a ceramic coating over the piston top it keeps the heat in, you coat the cylinders with some exotic materials, and the head with ceramic also. That all together makes the power charge (burnt fuel air and nitrogen) keep most of its heat while not transferring it to the block. The reason engines don't get crazy hot but the gases inside do is similar to how you can run a lighter over your skin and as long as it doesn't stay there long its okay.

i just woke up so dont hate me for punctuation.

[mister]

Yeah, but I see nothing about oil cooler. So woohoo.... round two or three or four or NOT.

Where did I put my popcorn gif...

Can we now debate piston and engine coating products? (Where did I put my pocking with a stick gif?)

[adidasguy]

.

[attachment deleted by admin]

[Twisted]

[mister]

Better than poking with a stick.

Popcorn. Woohoo.

[ToneZone]

What if you were riding on a treadmill?

[crzydood17]

What if you were riding on a treadmill?

Then your an idiot :p