how not to use nitrous...
500 Watt CAFz'r
Joined: Mar 2003
Posts: 747
Well if you have a high compression piston and put high amounts of boost into it, kiss that piston/valves goodbye because they are not made to take much compression. Thats why you need a 8.5:1 (I think that's it) Piston.
50 Watt CAFz'r
Joined: Aug 2003
Posts: 99
8.5:1 is about the compression ratio a small block chev has stock, and high compression before boost is hard on the motor, but the strength of the pistons themselves, valve seat surface area, etc are more important for durability. for example, someone i know built a 450hp n/a 350, and the pistons went after 5 pounds of boost. [img]graemlins/freak.gif[/img] now, with newer pistons, it makes more power reliably.
btw, who is the magazine guy?
[ August 19, 2003, 03:05 PM: Message edited by: cavity ]
btw, who is the magazine guy?
[ August 19, 2003, 03:05 PM: Message edited by: cavity ]
Guest
Posts: n/a
Holy crap this is funny!
You don't need certain pistons to turbosharge, any old pistons will work. Now if your compression ratio is high or your ignition advanced to far you can run into detonation earlier in turboed cars, but it also depends on how much boost, forged vs. cast cranks and rods etc. there is no magic numbers that say your running x amount of boost you need x parts. every engine will be different. For example many factory turbo deisels can take very large amounts of boost with no internal mods. while most imports need new forged parts to get past the teens in boost. Some import supercars (Toyota Supra) can make double the factory power without changing the internals. Every car is different. Many ignition systems can be programed to retard the ignition when boost comes on which can also help prevent detonation, which is what really kills the internals of an engine.
Oh and the quality of gas can also affect detonation, there are way too many variables to make the type of blanket statements being made here.
You don't need certain pistons to turbosharge, any old pistons will work. Now if your compression ratio is high or your ignition advanced to far you can run into detonation earlier in turboed cars, but it also depends on how much boost, forged vs. cast cranks and rods etc. there is no magic numbers that say your running x amount of boost you need x parts. every engine will be different. For example many factory turbo deisels can take very large amounts of boost with no internal mods. while most imports need new forged parts to get past the teens in boost. Some import supercars (Toyota Supra) can make double the factory power without changing the internals. Every car is different. Many ignition systems can be programed to retard the ignition when boost comes on which can also help prevent detonation, which is what really kills the internals of an engine.
Oh and the quality of gas can also affect detonation, there are way too many variables to make the type of blanket statements being made here.
