piston compression height

[Jim231]

Rebuild
From P.c.h
Piston compression height

231ci vy commodore

I want to go and use the high compression height piston

Now the stroke is 86.3mm("3.39")
I want to go "1.185" piston compression height...
Would I have to get a connecting rod "1.175" shorter
Or can you get them as a kit...
This is only a home projected
The photo is only a examples
Of what I want to do...

 

[Immortality]

I wonder if piston 1 is actually a L67 (supercharged) V6 piston. Piston 2 is an ecotec piston. You may need to check the listing for more info. The L67 uses a shorter rod but is also a lower compression to suit boost.

 

[Jim231]

I wonder if piston 1 is actually a L67 (supercharged) V6 piston. Piston 2 is an ecotec piston. You may need to check the listing for more info. The L67 uses a shorter rod but is also a lower compression to suit boost.

It is L36 shorter stroke
I would be better of increasesing
Deck engine height to compensate for "1.175" compression height...

It make good senses....

Raise the compression height raise the deck height..
What's your intell on that.....

 

[Immortality]

No. Both the L67 and ecotec have the same stroke. the ecotec has a short piston with a long rod which was done to reduce reciprocating mass. The L67 retained the heavier piston with the shorter rod to maintain the extra piston strength for the blown engine. Stroke is always dictated by the crank. The piston height + con rod length are used to get to the correct deck height.

changing deck height would require a new block.

 

[Jim231]

OK I will consider boring it out to increase power.But what is the maxium take out before the walls become critical...231 vy

 

[Jim231]

That is were you devide the stroke by 2 add the connecting rod height and subtract the deck
SIMILAR TO find compression height hay

 

[Jim231]

That is were you devide the stroke by 2 add the connecting rod height and subtract the deck
SIMILAR TO find compression height hay

Ps that is the same

 

[Jim231]

Ps that is the same

Stroke is always dictated by the crank. The piston height + con rod length are used to get to the correct deck height.

So add piston heigh and connecting rod height
To= deck height

Similar maths awsome it is actually fantastic to really find someone in the automotive field
Who knows there business

 

[Immortality]

Stroke/2 + con rod length + piston compression height.

On a Ecotec V6 the pistons pop up out of the bore and you use a thicker head gasket to get the correct squish (piston to head height), on something like a Holden V8 or Chev motor you would be aiming for a zero deck height ideally or close to it and then deck the block to suit.