LEGENDS > Engine Care & Tuning

Cylinder head interchange

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racerrad8:

--- Quote from: justfreaky on February 13, 2016, 12:32:18 am ---Have to ask...
Would that not lower compression?
Also; Is it legal? I guess that is the bigger question.
Interesting theory!

Steve

--- End quote ---

Why would it lower the compression?

Any XJR head without the EGR ports is a legal installation onto a 1200.

Randy - RPM

justfreaky:
Randy,

I was thinking about combustion chamber size. Since I do not know the difference in the heads, I was asking.

Steve

racerrad8:

--- Quote from: justfreaky on February 15, 2016, 05:49:25 pm ---Randy,

I was thinking about combustion chamber size. Since I do not know the difference in the heads, I was asking.

Steve

--- End quote ---

The heads are the same internally, just different in the amount of fins machined away on the outside between the FJ & XJR design and the EGR ports.

Those are the only two differences.

Randy - RPM

justfreaky:
Thanks for the info Randy.

Steve

DLR96:
So if the 1250 head has the egr's block off is it legal.

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