if im building the whole engine how would i do the compression and can someone explain what it is, why its important and what it does and how to do it also whats the best ratios

 

You confused the crap out of me with that post.

Are you asking how to figure out what compression ratio you will have and what are the effects of compression?

 

i guess i need to find a book that explains all this crazyness i just wanna build a 4v from the block up if you know any good books let me know!

 

sean hyland 4.6L and 5.4 is an awsome book, but anyhoo compression

it is the ratio between the volume of the cylinder and combustion chamber when the piston is at the bottom of its stroke, and the volume of the combustion chamber when the piston is at the top of its stroke. comprende? Picture a cylinder with the piston at the bottom of its stroke containing 1000 cc of air. When the piston has moved up to the top of its stroke inside the cylinder, and the remaining volume inside the head or combustion chamber has been reduced to 100 cc, then the compression ratio would be proportionally described as 1000:100, or with fractional reduction, a 10:1 compression ratio understand? the total/how much is left(ccs) define the compression of your engine.
High Compression is wanted because your car will make more power, however you can't go too high or else you need to use racegas which is just expensive, or else it will blow up plain and simple. If you turbo or s/c ur car DO NOT GO ANY HIGHER THAN 9:1 compression, 8.5:1 is a good number, any higher than 9:1 and your car will probably blow up lol

hope i helped.

 

oh yeah, the pistons/rods you buy will/should have a compression ratio somewhere where it lists part information.

oh yeah that book ^ i mentioned i think its called

4.6L and 5.4L modular engines? its laying around here somewhere also has a section on turbos, id suggest trying to find it, its orange with a picture of a twin turboed modular on the front.

writing is yellow?

 

is this the book if not can u get a pic of it?
http://search.barnesandnoble.com/How...2494686/?itm=1

 

yeah its an updated version of the one i have, it has alot of step by steps with pictures in there, its really a great book to have, i was new to the modular scene so it helped.

 

Sean Hyland is a douche. And there is alot of bad info in that book. But it will get you up to knowing more then you do now.

You can find compression ratio calculators on the internet to help figure out what you will have. You will need to know the cylinder bore size, piston stroke length, head gasket bore diameter, compressed head gasket thickness, chamber volume, piston cc and piston to deck clearance.

 

rofl sausages

 

No offense to the OP, but I really think you're going to be digging yourself into a hole with a project like this if you want to do this work yourself, but need to ask questions like this. I'd learn a bit more, maybe get some hands on experience, so you don't get all your parts and look at it like "WTF is this ****?"