L13A pistons in a L15A..

[unclepowers]

I am thinking about boosting..I want to know if the 1300 pistons will work in my L15A sport if needs be..

[ghostfit]

all l series engines have the same bore and cp. just different stroke. the l13 pistons won't lower compression. However if you do want to lower the cp. you could get a thicker head gasket Google cometic.

[underdog]

I wouldn't reccomend running l13 pistons. they are from an 8v engine and the l15a is 16v so you may run into valve clearance issues.

[ghostfit]

you would run into valve clearance issues if it was a domed piston. i believe the l series have flat top pistons.

[unclepowers]

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.

[kylerwho]

just put two head gaskets on to lower compression.

[underdog]

Originally Posted by kylerwho

just put two head gaskets on to lower compression.

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.

[kylerwho]

Originally Posted by underdog

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.

you missed my winking face. that was a huge joke. Seems like a logical answer but it has some real bad effects.