Why would no.6 get hotter when running Bosch EFi ?
What has Bosch EFI
specifically got to do with a well known and acknowledged phenomenon of cooling issues in certain circumstances? This is not a fuelling-related matter.
So, why his and not ours ? Sounds like the original problem* should be rectified before throwing fixes at it !
*specific to his own engine.
The *
"original problem"* is present in almost all production, road-going six cylinder Nissan L-gata engines. It is congenital, and inherent in the nature of the castings.
This is pretty much a non-issue on stock or lightly modified street engines and not much more than a slight - often unnoticed - nuisance on most 'race' tuned engines. The issue starts to become more problematic when - as has been pointed out - very high compression ratios and cylinder pressures are being used.
The 'fix'
does largely mitigate the "original problem". The only other way out is to design and make your own cylinder head casting. Nissan - of course - did exactly that with their E4621 and E4622 competition-homologated cylinder heads.
