L13A pistons in a L15A..
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Joined: Aug 2008
Posts: 18
From: Jamaica
L13 pistons in a L15
I wanted to know.I am planning to go boost.And i wanna get some "backup" pistons.I was getting some L13 pistons,just wanted to know if they could work.This is not like previous years when I boosted d15/16 then b16/18's.These parts (L-series) aren't exactly lying around where I am in Jamaica.
NOOOoo! that increases the piston to head clearance which reduces quench which could lead to detonation alot easier than just leaving it alone and spend more money on a professional tuner. there are several people out there that run high compression + boost with great results. look at all the boosted type R guys. they make the same hp as gsr's with typically 3-5 less psi and have a fatter power band.
its not always about lowering static compression. its about lowering dynamic compression! ie. cam timing, ignition timing, reducing backpressure(too small exhaust, turbine, ect....)free'er flowing systems will need less ignition timing to make the same power, thus reducing the chance of detonation but usually comes at a price. a little less boost response. however there are ways around that as well....twin scroll!!!
I will give you that lower compression gives you a buffer for mistakes. but the only way to do it right is custom pistons, or find a piston that works from another boosted engine with 73mm pistons 4 valves per cyl with same valve arangement. good luck.
Last edited by underdog; Oct 5, 2008 at 12:01 PM.
NOOOoo! that increases the piston to head clearance which reduces quench which could lead to detonation alot easier than just leaving it alone and spend more money on a professional tuner. there are several people out there that run high compression + boost with great results. look at all the boosted type R guys. they make the same hp as gsr's with typically 3-5 less psi and have a fatter power band.
its not always about lowering static compression. its about lowering dynamic compression! ie. cam timing, ignition timing, reducing backpressure(too small exhaust, turbine, ect....)free'er flowing systems will need less ignition timing to make the same power, thus reducing the chance of detonation but usually comes at a price. a little less boost response. however there are ways around that as well....twin scroll!!!
I will give you that lower compression gives you a buffer for mistakes. but the only way to do it right is custom pistons, or find a piston that works from another boosted engine with 73mm pistons 4 valves per cyl with same valve arangement. good luck.
its not always about lowering static compression. its about lowering dynamic compression! ie. cam timing, ignition timing, reducing backpressure(too small exhaust, turbine, ect....)free'er flowing systems will need less ignition timing to make the same power, thus reducing the chance of detonation but usually comes at a price. a little less boost response. however there are ways around that as well....twin scroll!!!
I will give you that lower compression gives you a buffer for mistakes. but the only way to do it right is custom pistons, or find a piston that works from another boosted engine with 73mm pistons 4 valves per cyl with same valve arangement. good luck.
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