E85 not around this area so much yet. in fact i have yet to see it here.

i think someone said a long time ago what way it went. longer stroke gave more displacement and took away from hp? god i dont wanna go back lol

 

Cheers

 

more displacement = more fuel/air you can put into the piston and get more power..

ya im sure a shorter stroke= more compression.. that would explain why diesels have a short stroke to achieve an 18:1 compression..

actually i think a longer stroke would make more torque.
using the idea that the longer the wrench the more torque you can put on the nut..

so the longer the rod the more leverage you have on the crank..

 

The longer the stroke, the more air and fuel you can suck in the combustion chamber to compress. Displacement is an end product, not the means.

 

Hey I found a pic of my beast , kinda like ubber's

Hey ubby this is what it looks like with a cab

 

ya your right.

picturing it in my head it makes since.. how do diesels achieve such high compression when your first starting them? i can see how they get high comp. because of the turbo but what about when there starting..

idk i've always thought diesels had a short stroke but maybe they dont? idk.

i've got so much to learn about engines.

so making the sroke longer on an engine increasing compression? and higher compression = a more complete burn?

although thinking about it i suppose its not hard to achieve high compression in diesels. displace enough air with fuel and you'll get more compression. or so i think.. idk!

 

sexy Ford machines.

 

Higher compression is the result of more a/f being packed into a small space. This can be achieved many ways. One of which is increasing the stroke, however there are some drawbacks to doing that and you can't just stoke an engine, lots of planning and math is involved and dry runs! Another way is shaving the head or boring the cylinders. All of these are going to give you more a/f into the chamber to be compressed.

Diesels have to have a higher compression ratio because that is what causes ignition, not a spark. The a/f is compressed until the temperature is high enough to ignite, which is why you get the knocking sound in a diesel. That's an explosion you're hearing.

There's too much to explain in detail, but I hope that helps...

 

it does. i've known that diesels dont use spark plugs. and in a way i answer my own questions.. you cant compress a liquid so im imagening that as the diesel is compressed its flash point lowers and as the air is compressed it heats up so.. air heats up and boom.. and i can see how diesels reach high compression by simply squeezing alot of fuel/air into such a small space..

i know you can photo detonate gasoline but they cant build an engine strong enough to reach that kind of compression nor handle the power.

 

and heres number 700

 

Sweet!! That's a great pick - I usually don't care for the 2WD look , that one looks nice!!

 

Holy long thread

This is getting kind of entertaining too

Oh yeah, Im fastest...

 

Compression (static) ratio has nothing to do with how much air anf fuel you pack into a cylinder. It is purely a mechanical characteristic. Most diesels hover around 15 - 17:1 c.r. This means, in an 18:1 c.r. diesel engine, that if you compared the cylinder volume to a piston at Top Dead Center to another cylinder with the piston at Bottom Dead Center the volume in the TDC cylinder is 1/18th the volume in the BDC cylinder. Diesel engines usually have very long strokes...4" - 6" or more. Diesel engines also don't "knock" in the sence a gasoline engine does...that characteristic knocking sound in a diesel is usually the injection pump for the fuel. Diesel engines compress air first, then has the piston approaches or passes TDC the injector sprays fuel into the air that has been heated enough to combust the fuel due to the compression. That is why modern diesel engines can make so much more power with bolt-ons that what a gasoline engine can. Not only are they built to handle the load but the fact that they doen't suffer from pre-ignition (knocking, detonation, etc..) like gas engines do goes a very long way to making power.

 

I can hear Uber's head gears turning now...and the next question is?

Displacement? You keep saying there's no replacement...

That's the volume your combustion chamber holds. So you can see from my previous post, you can increase the size of the chamber, sooooo....

 

Hope this works right. Me 2 same same