SPACK

Would like to change the diff ratio in my XF, I believe its a 2.77..just to low for me, Is there a 3.23 diff centre, that I can put straight in...

The 2.77 is NOT lame..however i am having to go through the gears to fast , the ratio is too low, I have an AU /several actually, with around the same HP, and the ratios being 3.23/3.45 are better suited to the HP..I want the XF to run out longer as the engine runs out near 5400 RPM, I want the diff to run out longer..

ok thanks..might have to change the whole thing..

Fuel pump, would be a start, change the fuel filter, clean the injectors..

I have been driving my XF EFI without a CAT for about 20-22 years, 2 1/2 INCH STAINLESS STEEL, GENIE EXTRACTORS, AND a rear muffler., GREAT sound, how ever i have always found that if I accelerate through the gears, every time i change a gear, the car feels like it is being held back, it does not want to keep going, I have decided this week, WEDNESDAY, to put a HI-FLOW 100 CELL CAT ON. CHALK and CHEESE, The car wants to go, it feels like there is another 5-10 kws OF power there...any one know why this would be.I thought the straight through pipe would be better with no restrictions..

I am not sure what has happened, it was just the changing through the gears, the car felt like it was being held back, but now that LAG has disappeared..the car seems freer, the lag, being held back, has gone..

Thanks guys, just wondered, it just FEELS and drives better..

I heard such good things about these CATS, i decided it was time to put one on and obviously, it should have one on, mine was a straight through pipe from the extractors to the muffler at the rear.....I WENT OUT side and measured the diameter and it is 2 1/4 inch...any way the car works a lot better now....

Has any one had or have an AU S2/3 XR6 with the VCT MOTOR, and modified it WHILST keeping the VCT ? I cant seem to find any info on these engines, NO problem with the INTECH MOTORS, but nothing on the VCT...Would love to put a nice CAMSHAFT in, either STAGES 1-2-3 OR 4..but nothing...Any one able to point me in the right direction..?.cheers

Is there a company that sells a stronger better PUSHROD for the XF EFI ENGINES.., I rarely ever go pass the 5000 rpm,s, YES the SVO does do it, but I keep bending the RODS, when I do, so its a rarity..also WOULD it help to change the LIFTERS?..CHEERS.

I just dont want to pull the head off and have it checked out, costly, BUT, I may have to..

Double valve springs on it,..and you said PRECISION, is that there full name..?

I had these noises from under my AU XR 6, The mechanic said link pins were gone, I bought some springs and monroe shocks and a 28 mm sway bar 2 new link pinks, It sits a few MM,s lower and handles better ..However the noises are still there...the only thing the MECHANIC pointed out to me was the rotors were slightly warped, could that be where the noise/s are coming from....he did not say any thing about the Ball joints..?

Is the UNICHIP any good for the XF EEC1V computer.?..Or using the EA/EB 1 closed loop( no smartlock) EEC1V, and running a stock code better, and cheaper...?

Hopefully some one has had this problem, and can help. After driving the car last week for about 20-30 mins, all at the legal speed limit, so there was no speeding, no taking off like i am doing the 1/4 mile, I noticed, first a "BEARING" type noise when i depressed the clutch and changed from 2-3rd. At the next set of lights, turning the stereo down, I took off, staying in 1st a little longer, just when i was going to change into 2nd, I heard, what sounded like METAL RUBBING METAL, changed into 2nd, ball bearing sound, then at about 23 to 2500 RPM,s the METAL sound again, I depressed the clutch, to change into 3rd, did it, and as i released the clutch pedal, the noise could be heard again..This noise is only heard going UP through the gears. On thursday i had the box pulled down really the only thing they could find wrong is the REVERSE gear cluster, slightly worn,...I had the bearings replaced anyway, and new seals. Went out today, sunday, Same thing happened again, same amount of time, same noise..1st, off, I am thinking, 20-30 mins..HEAT, 2ND its the front INPUT BEARING....thoughts please...OH, last year I had a EXEDY SPORTS CLUTCH put in....

He has driven it, but obviously not for that length of time...ill be talking to him tomorrow..

It appears to need at least 20-30 mins of driving/usage/heat before the noise appears. The noise appears at a certain REV..2200-2500 rpm...when i am in 2nd gear there is a BEARING sound and i can actually "feel" the gear stick slightly moving in my hand, yet the gearbox mechanic cant find any thing wrong internally, the bearings are new, and the seals changed...

Thanks STEVEHOBART..will love to hear how it goes..

More Importantly, what was the differences you found after installation ?

too much info, and my car feels like a boat at 65 klms around a corner...even with NEW SHOCKIES...LOL

Is there any difference in the A/C COMPRESSORS in the XF series....I need an A/C COMPRESSOR for my XF..EFI, And EBAY WANTS nearly $700 for one...

At the moment its just going to the windscreen ....THE FAN WHEN ITS SWITCHED ON, THAT IS...I dont know how to get the photos working on this site,..so i cant put a photo up to even show you..

He said some lines, T pieces and that vacuum canister. Actually any one got an exploded view of an XF showing the vacuum lines under the bonnet..?

OK, so its been gassed, the vacuum is holding, but apparently half of the lines are missing and a VACUUM canister is missing..SO I have to find these things geez..

With the engine having to be pulled out so the BAY could be painted, there would be no gas in there..so ill see what happens today..