pistons
#1
11-08-2006, 02:47 AM
pistons
i have an eclipse gs and i wanna change the pistons and camshafts what compression would work good? and what camshafts? i probably will buy a turbo but not yet, so i need something that help me put some power now and works with turbo
#2
11-08-2006, 08:07 AM
RE: pistons
I don't if they will improve horse power but they deffinilty will be a lot stronger for when you do turbo your eng allowing you bump up the boost. http://www.hahnracecraft.com/hahn/parts/engine.htm
#4
11-08-2006, 10:47 AM
RE: pistons
that's kind of a double edged sword. the stock compression in a GS is 8.8:1. now, for extra power you can get 10.5:1 or 12.5:1, both of these will give you power gains but you won't be able to run much boost on them without having problems. also if you go with he 12.5:1 you will have to run premium (93 octane) if not better for it to run safely. if you stick with the 8.8:1 you won't see any power gain or loss, and if you go with the 8.5:1 you will see a little power loss but these are optimum for boost b/c you can run more boost on a lower compression piston. and you get more power out of boost than you do from compression... so it's really up to you. you could get the 10.5:1 drop em in there and whenever you are ready to boost, you could sell them and get the 8.5:1 or if you plan on running a lot of boost. . . 8.0:1 but i haven't seen those sold for the 420a. good luck.
#5
11-08-2006, 10:56 AM
RE: pistons
ORIGINAL: RCJr9186
that's kind of a double edged sword. the stock compression in a GS is 8.8:1. now, for extra power you can get 10.5:1 or 12.5:1, both of these will give you power gains but you won't be able to run much boost on them without having problems. also if you go with he 12.5:1 you will have to run premium (93 octane) if not better for it to run safely. if you stick with the 8.8:1 you won't see any power gain or loss, and if you go with the 8.5:1 you will see a little power loss but these are optimum for boost b/c you can run more boost on a lower compression piston. and you get more power out of boost than you do from compression... so it's really up to you. you could get the 10.5:1 drop em in there and whenever you are ready to boost, you could sell them and get the 8.5:1 or if you plan on running a lot of boost. . . 8.0:1 but i haven't seen those sold for the 420a. good luck.
that's kind of a double edged sword. the stock compression in a GS is 8.8:1. now, for extra power you can get 10.5:1 or 12.5:1, both of these will give you power gains but you won't be able to run much boost on them without having problems. also if you go with he 12.5:1 you will have to run premium (93 octane) if not better for it to run safely. if you stick with the 8.8:1 you won't see any power gain or loss, and if you go with the 8.5:1 you will see a little power loss but these are optimum for boost b/c you can run more boost on a lower compression piston. and you get more power out of boost than you do from compression... so it's really up to you. you could get the 10.5:1 drop em in there and whenever you are ready to boost, you could sell them and get the 8.5:1 or if you plan on running a lot of boost. . . 8.0:1 but i haven't seen those sold for the 420a. good luck.
#8
11-08-2006, 12:52 PM
RE: pistons
really? i would think with a name like Hahn they would wanna be able to tell their customers they could push 20lbs of boost no problem.... oh well i havent looked on their site for a long time.
#9
11-08-2006, 02:18 PM
RE: pistons
so if I get the 10.5:1 wouldn't be able to put a turbo? i think i'm just gonna put 8psi on it, not too much
#10
11-08-2006, 02:25 PM
RE: pistons
no you dont want to run those pistons with a turbo. My suggestion is if you are serious about turbocharging it then just get some 8.8 or 8.5:1 forged pistons.