|
| Search | Car Forums | Gallery | Articles | Helper | Air Dried Fresh Beef Dog Food | IgorSushko.com | Corporate |
|
#1
03-07-2005, 12:49 PM
|
||||
|
||||
|
Compression question
If some one wanted to turbo something whats a good compression ratio for the engine? some one told me 10.5:1 is good.
|
|
#2
03-07-2005, 02:25 PM
|
||||
|
||||
|
Re: Compression question
lower is better for FI. i would go with 9:1 or 8.8:1 like the evo
|
|
#4
03-07-2005, 03:07 PM
|
||||
|
||||
|
Re: Compression question
yeah 8.5 is good too. i havent seen any 8:1 made for this car
|
|
#5
03-07-2005, 06:00 PM
|
||||
|
||||
|
Re: Compression question
Sorry for being a idiot to compression. But what does it do/mean. the more i understand the less likely i will be to blow/mess anything up.
__________________
|
|
#6
03-07-2005, 06:14 PM
|
||||
|
||||
|
Re: Compression question
its the degree to which the air/fuel mixture is compressed before ignition.
ex. 8:1 compression ratio means that the air/fuel mixture is compressed to 1/8 of its original volume
|
|
#7
03-07-2005, 06:22 PM
|
||||
|
||||
|
Re: Compression question
so with saying that, the more you compress, the more power or less? Which is better- more fuel or air. Both maybe? i don't understand to much of mixing.
__________________
|
|
#8
03-07-2005, 06:41 PM
|
|||
|
|||
|
Re: Compression question
forced induction compresses the air/fuel molecules tighter. instead of the piston sucking in the air, air pressure is at a constant being "forced" into the cylinder. more fuel is required to compete with the extra air being forced into the cylinder, hence why a larger fuel pump and larger injectors are needed.
howstuffworks.com is a good place to look up these kinds of questions.
__________________
www.Club3gse.com
|
|
#9
03-07-2005, 08:14 PM
|
||||
|
||||
|
Re: Compression question
if you are going to run a N/A motor, then high compression pistons are better for the reason that you will be able to compress more.
however, when running FI, its already being compressed. you know that when you compress air, it heats up. so if you have the turbo compressing the air and the pistons with a high compression ratio, then you have some serious heat issues. too much heat = bye bye motor
|
|
#10
03-07-2005, 08:49 PM
|
|||
|
|||
|
Re: Compression question
The 3G RS/GS with the 4G64 has 9:1 CR already. If you are planning on running more than ~13psi worth of boost, plan on lowering the CR to 8.5:1 with a set of forged internals.
|
|
#11
03-07-2005, 09:09 PM
|
||||
|
||||
|
Re: Compression question
hey johnnybgood, send me a free turbo kit 2.4L and ill put a huge advertisement for your company on my car...haha just the 8.5psi kit..haha..that would be nice.
__________________
Made the switch from Mitsubishi -> Honda (acura)....so glad i did!
|
|
#12
03-07-2005, 10:26 PM
|
|||
|
|||
|
Re: Compression question
ha, good luck with that.
__________________
www.Club3gse.com
|
|
#13
03-08-2005, 05:36 AM
|
|||
|
|||
|
Re: Compression question
 yea... that's not going to happen
|
|
#14
03-08-2005, 07:36 PM
|
||||
|
||||
|
Re: Compression question
So the more i compress, the more heat and the less i compress the less heat? And if i was running turbo would i need an inter cooler to compress more?
__________________
|
|
#15
03-08-2005, 10:21 PM
|
||||
|
||||
|
Re: Compression question
the intercooler is used to cool the air that is already compressed. which would allow you to be able to compress more air safely...ie. higher boost
|
|
 |
POST REPLY TO THIS THREAD |
 |
|
|
