MAF or AFM i meant sorry

[lestershaw]

i have noticed that two of my Xjrs have different Mass air flow meters
the 1999 model has the number LME1620 BB and is an unblocked version with a tonsil like sensor in the middle
the 1998 models have the number LME1620 AA and is blocked with a kind of propeller shape
does it matter if i swap them over, i presume the BB is the later, but does that mean better.
i was changing the cone filter which it had on it (the 1998) and took the original airbox from the 1999 one when i noticed they were different.
thanks in advance.
i havent noticed any difference in performance or sound while changing back from the cone filter to the original box filter like it was suggested i would
lester
sorry one more
i have two XJRs both have the supercharger pulley mod, one has the top pulley done, and the other the bottom pulley. is there much benefit of having one car with both pulley mods, and would i have to upgrade the supercharger cooling?
Thanks
Lester

[Ecurie Ecosse]

Hi Lester

With the pulley mod Powerhouse recommend getting a better chargecooler if you have both done.

I was out on my XJR today - they're great cars!

[NormanD]

I have replied to your other post regarding putting the later MAF on the car

[lestershaw]

Ecurie Ecosse said:

Hi Lester

With the pulley mod Powerhouse recommend getting a better chargecooler if you have both done.

I was out on my XJR today - they're great cars!

yes i thought that, im not sure why, or what it does? i was hoping jaguar steve would enlighten me :-)
great day for a drive, shame i am at work ;-(

[Ecurie Ecosse]

lestershaw said:

Ecurie Ecosse said:

Hi Lester

With the pulley mod Powerhouse recommend getting a better chargecooler if you have both done.

I was out on my XJR today - they're great cars!

yes i thought that, im not sure why, or what it does? i was hoping jaguar steve would enlighten me :-)
great day for a drive, shame i am at work ;-(

I think that the extra pulley makes the supercharger get hotter, and that makes the ECU retard power. If you have the better chargecooler it doesn't do that.

[NormanD]

I also fitted a larger Charge Cooler water pump to give better flow

+50% if I remember

Edited by NormanD on Sunday 25th November 22:11