how low can u go?

TGemi1 · tinkerer Joined: 23 Mar 2003 Posts: 456

ta;lkin engines for running a turbo, ive been told my engine will be around 7:1 comp ratio (1600 block 2l head), would it be k to whack decomp pistons in or is there like a certaion comp ratio where it's too low. what happens when they r to low, i need good info. what pistons does people recommend, they will be 1800 pistons dunno what brand to get tho,

Chirs...

coupetx · tinkerer Joined: 09 Apr 2003 Posts: 186

if your comp is to low your air/fuel mixture will not ignite, personal i wouldn't use any standard gem piston in it if u are planing on running any resonalbe amount of boost, u need 2 get hardened or forged pistons to handle boost pressure

hypaTG · backyard mechanic Joined: 15 Oct 2002 Posts: 524

remember, the lower your comp is, the crappier it will go off boost. so if your turbo spools up late, then you'll be a snail until you hit some boost.