LegendsRacer - Legends & Bandolero Racing Forum

LEGENDS => Engine Care & Tuning => Topic started by: racer0x on February 12, 2016, 01:57:35 pm

Title: Cylinder head interchange
Post by: racer0x on February 12, 2016, 01:57:35 pm

Question is it possible to put a 1250 head on a 1200?

Title: Re: Cylinder head interchange
Post by: racerrad8 on February 12, 2016, 07:31:05 pm

As long as it does not have the EGR ports/tubes it can be used on a 1200.

Randy - RPM

Title: Re: Cylinder head interchange
Post by: 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

Title: Re: Cylinder head interchange
Post by: ZForceRacing01 on February 13, 2016, 04:22:44 pm

Its always legal till u get caught ;)

Title: Re: Cylinder head interchange
Post by: justfreaky on February 13, 2016, 05:01:23 pm

LOL! True, that.  ;D

Steve

Title: Re: Cylinder head interchange
Post by: racerrad8 on February 15, 2016, 10:55:22 am

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

Why would it lower the compression?

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

Randy - RPM

Title: Re: Cylinder head interchange
Post by: 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

Title: Re: Cylinder head interchange
Post by: racerrad8 on February 15, 2016, 08:14:53 pm

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

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

Title: Re: Cylinder head interchange
Post by: justfreaky on February 15, 2016, 09:24:26 pm

Thanks for the info Randy.

Steve

Title: Re: Cylinder head interchange
Post by: DLR96 on November 04, 2018, 04:35:54 pm

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

Title: Re: Cylinder head interchange
Post by: justfreaky on November 04, 2018, 06:09:37 pm

I believe it is.

Steve