I will have to look it up later, need to leave for work now, post what numbers you have and I will reference them later.

 

DMBZ6A 40528A
GC68 3 58
i have 2 of these which i will guess are for the 58 2.4 blocks i have.
DMBZ6A 40528B
GC68 1-59
I have one of these the only change is the letter one is A and one B
that is the 2 types i have here thanks

 

The numbers you are looking for are the 40528 A and the 40528 B, these are the standard fit for the MK1 2.4 so not upgraded.

I can only find a Jaguar Part no for the one that is supposed to be fitted C13428, which I can't cross reference, the closest part number to that (assuming a typo on the original) is the one from a XK150S, but I am at the moment taking a bit of a leap there !
Assuming the stage 3 would increase compression ratio to 9:1 then also assuming that the parts must all be available from other models at the time, the part no for the XK150S distributor is C14268, but I cannot state that as fact obviously.

I will keep digging, but those Distributors are definitely correct for a standard 2.4

http://www.jag-lovers.org/xk-lovers/...stributors.htm

 

Thanks for that

I wonder why i have 3x 2.4 spares the part that makes me think is the 58,59 part possibly the year of manufacture as i have 2x 58 blocks but its possible the car one is different being the 3.4 head would it run on a 2.4 distributor ? Due to firing/timing would be different.

The xk150s has the same distributor as the mk1 3.4 9:1 up above it on that link

I would think the compression would be changed being that the 2.4 block and 3.4 heads last prefix is 8 for 8:1 compression, but having that combo would change it ?

 

There is a book in french that has the xk engine combinations that work with charts to show so apparemtly its easy to understand its called "Le Grand Livre XK" i can't find an ebook version though.

 

I found another interesting looking ebook which i am considering getting but unsure if useful

http://www.barnesandnoble.com/mobile/w/jaguar-the-complete-story-of-the-famous-jaguar-car-john-bentley/1119716075?type=eBook

 

The engine would run on a 2.4 distributor, it's not really the timing as such that's different, it's the advance curves, this does affect timing obviously, static timing can be set on any distributor, but the vacuum unit and springs change the advance curve which controls the power at different revs.

The compression ratio would be changed by the actual pistons, the crown is different which means that the volume at TDC is less therefore higher compression. It can be changed by the head too, but the heads are the same on the different comp ratio engines.

 

Ok so it would remain 8:1 unless its had more work.

I was just thinking after reading today about a factory option on the xk120 i think it was they offered factory upgrades also which specified clutch, gearbox, type "c" head with high lift cams and webbers ? Or 2" su carbs which sounds more like a stage 3 setup ? Which apparently took the motor out to either 190bhp or 210bhp not 100% it was a sample read of an ebook