RCS 
Member 
 
Registered: 26th Jan 05
 Location: Lichfield/Dundee 
User status: Offline 
 
 | 
 
Are the C16XE and X16XE bottom ends identical? I know the heads are different with all the EGR ports, but should a C16XE head go on a X16XE with no bother? Are the pistons the same size etc? Will compression ratio be affected by this if the pistons are a different size?
 | 
Cybermonkey 
Member 
 
Registered: 22nd Sep 02
 Location: Sydney, Australia 
User status: Offline 
 
 | 
 
compression ratio is different between the two. C16XE is 11.0:1 while the X16XE is 10.5:1. Also, inlet and exhaust tracts are different I THINK.
 | 
James R 
Member 
 
Registered: 4th Feb 03
 Location: 205GTi16/306GTi16 
User status: Offline 
 
 | 
 
The c16XE has the provision for EGR, just the TB plate that bolts to the inlet manifold blanks it off. 
the head will bolt straight on and work. 
the port designs are slightly different and partially acount for the extra power the early engine made.
 | 
RCS 
Member 
 
Registered: 26th Jan 05
 Location: Lichfield/Dundee 
User status: Offline 
 
 | 
 
So what will be affected if I run a X16XE bottom end with a C16XE head?
 | 
Greasemonkey 
Member 
 
Registered: 17th Apr 02
 Location:         Drives a Tractor 
User status: Offline 
 
 | 
 
you will need a C16XE ECU cos you will have to run an air flow meter, you will need a C16XE wiring loom to plug into the air mass meter and new ecu er a new manifold to get rid of the EGR stuff. It will run fine after this, i had a X16XE bottom end on my C16XE, the compression is due to the head not the bottom end as the stroke is the same on the two
 | 
AJBek 
Member 
 
Registered: 31st Jul 02
 Location: Ayrshire 
User status: Offline 
 
 | 
 
cool, it is my bottom end he is thinking about buying, but we weren't sure if it would work with his head.  If you are still interested mate PM me.
 | 
Rileysport 
Member 
 
Registered: 18th Jun 04
 Location: West Yorkshire 
User status: Offline 
 
 | 
 
quote: Originally posted by Greasemonkey 
you will need a C16XE ECU cos you will have to run an air flow meter, you will need a C16XE wiring loom to plug into the air mass meter and new ecu er a new manifold to get rid of the EGR stuff. It will run fine after this, i had a X16XE bottom end on my C16XE, the compression is due to the head not the bottom end as the stroke is the same on the two 
   
 
wouldnt NEED to run an afm, you could use map sensor and the x16 loom with egr disabled  
 |