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Time For Camshafts

OMGGTR

By OMGGTR,
in Engines & Forced Induction

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r31slpr Rising Star

r31slpr

Posted
Posted

From what i gather it would be a bad idea due to thermal expansion, different materials expand at different rates, example: ally head, iron block and stainless head gasket. Theres a lot of heat in the combustion chambers

Gerg_R31 Mentor

Gerg_R31

Posted
Posted

Matching oil drains and water jackets on block and head to head gasket, yeah go for it

but matching the gasket to the block cylinders is a bad idea, (bores need to be straight no taper no ovality) yes it has a chamfer on top of the bores, but they're only purpose is to help get the rings in during assembly

matching the chamber to gasket, enlarging the chamber, removing both squish pads will reduce the quench (when the flat spot of both piston and head meet in pushes the last of the volume into the combustion area for a more "complete" burn) removing the intake squish pad has been done a fair bit but you will find there is still material between the chamber and gasket

then there is the extra volume that was just added, can you garantee that you haven't reduced the compression ratio dramatically?

Removing all that material will put extra strain on the firing ring on the head gasket, all the material being removed up to the firing ring will encourage the gases to escape, consistently blowing head gasket

  • 2 weeks later...
NoFigJamHere Enthusiast

NoFigJamHere

Posted
Posted

To V8tzr: I definately dont reommend matching the head to the head gasket, but if u want to build yourself a better engine, after the block has been bored/honed or is in ready to assemble stage bolt the ead on WITHOUT a head gasket and install all bolts (if using studs make sure theyre all installed and use 6 nuts with washers on front 2 rear2 and centre 2 studs) only needs to be firmly tightened DONT torque to specs!, Also make sure both DOWELS are in the block. get a long scribe thats very pointed and sharp and mark the parts of the head that over-hang, dont worry abt the flat squish pads but more on the outer most diameter areas. The bigger the bore is from STD the more this area becomes an issue. Like ive mentioned if done correctly you WILL be able to make more power than if u dont do it. Cheers

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