Which V4 Cylinder Heads Have Higher Compression?

[ezeke]

I have two very good sets of V4 Cylinder heads: 324528/324529 & 326504/326505. They look identical.

Can anyone tell me if one is higher compression than the other?

Thanks in advance for any assistance or direction.

 

[ezeke]

Re: Which V4 Cylinder Heads Have Higher Compression?

ttt

 

[flabum]

Re: Which V4 Cylinder Heads Have Higher Compression?

They are the same head sets. The previous # is for 1978 - 1980, the latter is for 1981 and later. No noticeable compression difference. Get them cut by someone like Monty Racing or get a set of mid- '70's 135 heads.

 

[ezeke]

Re: Which V4 Cylinder Heads Have Higher Compression?

Thank you.

The mid-70's heads don't hold the ignition coils that I want to use or I would be using some that I already have.

I would choose the higher of the two in question if there were any difference, but in this case they will be all right as they are.