I need HELP!.."Ya cant put a turbo on yur car son, it has too much compression!"
03-03-2005, 02:24 PM
#22
3.0 BAR
Join Date: Jan 2003
Posts: 4,438
Re: I need HELP!.."Ya cant put a turbo on yur car son, it has too much compression!"
if you tune conservativley, the f22 bottom end is pretty strong and can take quite a bit of boost. Didnt one guy on here run like 22psi for a week or 2 and it lasted a while before it blew?
03-03-2005, 02:35 PM
#23
0.0 BAR
Join Date: Jan 2004
Posts: 0
Re: I need HELP!.."Ya cant put a turbo on yur car son, it has too much compression!"
Originally Posted by accordepicenter
if you tune conservativley, the f22 bottom end is pretty strong and can take quite a bit of boost. Didnt one guy on here run like 22psi for a week or 2 and it lasted a while before it blew?
03-03-2005, 08:10 PM
#24
0.5 BAR
Thread Starter
Join Date: Jun 2003
Posts: 51
Re: I need HELP!.."Ya cant put a turbo on yur car son, it has too much compression!"
I KNEW IT! oh its on now....btw im terribly sorry for the long *** post, i guess i got a lil carried away... 
I thank all for your thoughts, i am indeed very happy i found this site. SO, now that the compresion issues are out of the way, id like some enlightenment on this important tuning i must take care of...keep in mind, this engines old, and im also hangin on a damn thread with my liscense thanks to my time-trial driving style... so theres no need to turn this thing into a fire-breathing street-beast, trust me if i could i would... and im still a little concerned bout the high-milage, almost 250 000 km, i aint beein a -----, its juss that i care for my only car! and i cant afford to blow it up. Also, if im running low boost and drivin it easy (as gay as that sounds, its better than nothin), do i really have to worry bout management issues?? Thanks again guys, Chris.
P.S. I tried desperatly to add a file but apparently im not aloud too...wtfks up with that?
I thank all for your thoughts, i am indeed very happy i found this site. SO, now that the compresion issues are out of the way, id like some enlightenment on this important tuning i must take care of...keep in mind, this engines old, and im also hangin on a damn thread with my liscense thanks to my time-trial driving style... so theres no need to turn this thing into a fire-breathing street-beast, trust me if i could i would... and im still a little concerned bout the high-milage, almost 250 000 km, i aint beein a -----, its juss that i care for my only car! and i cant afford to blow it up. Also, if im running low boost and drivin it easy (as gay as that sounds, its better than nothin), do i really have to worry bout management issues?? Thanks again guys, Chris. P.S. I tried desperatly to add a file but apparently im not aloud too...wtfks up with that?
03-03-2005, 08:28 PM
#25
0.0 BAR
Join Date: Mar 2005
Posts: 4
Re: I need HELP!.."Ya cant put a turbo on yur car son, it has too much compression!"
No engine has a compression ratio to high to boost if it is built for it. A diesel is a perfect example. You will be fine boosting your f22. Hell I say boost and then put an H22 head on it. Even more fun.
03-03-2005, 09:54 PM
#26
0.5 BAR
Join Date: Jul 2003
Posts: 109
Re: I need HELP!.."Ya cant put a turbo on yur car son, it has too much compression!"
---- man... It all depends on fuel management. My Nephew told me I should boost my motor at 10:1 compression. I told him it would burn a piston faster than I could tune it. It has a carburetor. I am envious of you EFI folks.....
If you have fuel injection, FMU that bitch and give it AT LEAST 8 psi and go knock the nuts off a Mustang
If you have fuel injection, FMU that bitch and give it AT LEAST 8 psi and go knock the nuts off a Mustang
03-03-2005, 10:40 PM
#28
1.0 BAR
Join Date: Jan 2004
Posts: 255
Re: I need HELP!.."Ya cant put a turbo on yur car son, it has too much compression!"
I would favour a downloaded uberdata map over FMU and that's not saying much. Lots of times you hear the compression ratio argument being thrown around by internet parrots. In 999/1000 those writing the words don't know the first thing about tuning. I've boosted 12:1 motors without any trouble.
-Michael
-Michael
03-04-2005, 11:35 AM
#29
3.0 BAR
Join Date: Dec 2004
Posts: 2,133
Re: I need HELP!.."Ya cant put a turbo on yur car son, it has too much compression!"
umm. Im gonan boost my 10.2:1 stock block B16 10-12 psi. Dont be skurrrd on 8.8:1 you'll be fine. Do a cpmoression test before you even start buying parts for your project. (I got 230 in all cylinders warm 
)
)
03-04-2005, 12:07 PM
#30
1.5 BAR
Join Date: Aug 2003
Posts: 1,194
Re: I need HELP!.."Ya cant put a turbo on yur car son, it has too much compressi
Originally Posted by iluvdrt
No engine has a compression ratio to high to boost if it is built for it. A diesel is a perfect example. You will be fine boosting your f22. Hell I say boost and then put an H22 head on it. Even more fun.
They simply aren't even remotely similiar when you look at the combustion process.
There's no such thing as detonation in a diesel, as they don't compress a fuel mixture, just air. The combustion is completely under control and centralized around the injector. And even when there is no such thing as detonation on a diesel, the manufacturers still use lower compression on their turbo engines to reduce mechanical stress.
Let me see you make any power out of a 16:1 compression petrol engine with a turbocharger, at least 0.5 bar boost and it must be able to sustain flat out full throttle for 5-10 miles without blowing to pieces.
There is such a thing as too high compression ratio, however it comes down to what kind of combustion chamber design you have, what kind of cylinder heads, rod to stroke ratio, rpm range where boost will be in and last but not least type of fuel. Both octane ratings and evaporative/thermal properties decide how good the fuel is on a high pressure engine.
You want the peak cylinder pressure to happen just a few degrees after TDC. If you are not able to get the peak pressure to happen at the right time because your ignition is retarded around the crank to reduce detonation, your compression ratio is too high for the fuel you're using.
At high rpm everything happens a lot quicker so each degree in spark timing becomes less critical, however the heat builds up a lot faster at high rpms if something is not done properly so most people melt their engines at high rpms.
