BBC piston cutting

[Shads]

Anyone have any experience cutting the domes off pistols to lower the compression? I have 13-1s in a 468 and would like to get it in the pump gas range.

 

[rockyfatcat]

If the compression is too high. The only thing I have seen is replacement of the piston set. Particularly true when turbocharging a motor.

There is power to to be had from upping the compression. Too much of a good thing has expensive consequences.

BTW Diesel engines typically have compression ratio in the 17-25 range. A compression combustion engine. No spark plugs.

 

[Shads]

Trying to avoid the cost of a new set. If I can cut these down I save money to spend on my toys

 

[ShawnZR-1]

Check into a different head gasket with less of a squash.

 

[Tony2X]

It depends on what pistons you have man....some can, some can't.

Call Matt Bishop @ (770) 941-6022

 

[WildBillHimself]

You can do it but the dome is probably hollow and if you remove too much it will collapse under compression. Measure the dome thickness carefully before cutting.

 

[Boz1911]

Won't be enough material to remove, could cost an engine

 

[ShawnZR-1]

Ya know, if you're going in and removing pistons, just get a new set. Why even tempt fate?

 

[galvatron]

Ya know, if you're going in and removing pistons, just get a new set. Why even tempt fate?

^this...

 

[Bennyboy]

Swap to heads with larger combustion chamber. Probably find some guy to trade even with that wants the high compression. Free and less work too.