Cold Air Intake?
#1
Cold Air Intake?
Has anyone tried making an intake for the 5.3 or 6.0 using the intake tube from the 4.0 (EBC2403)? I know the late 6.0 models had a cold air intake that opened up above the radiator utilizing two similar tubes leading to the boxes. I'm interested in putting in a cold air intake, but not so interested in the DIY ducting on the XJS setups I've seen. If no one's tried this before then perhaps one of you 4.0 owners out there would be so kinda as to send me the dimensions of the opening at the end of the tube and the length of the unit itself so that I can figure out if this is an task I'm gonna attempt or not.
#2
Has anyone tried making an intake for the 5.3 or 6.0 using the intake tube from the 4.0 (EBC2403)? I know the late 6.0 models had a cold air intake that opened up above the radiator utilizing two similar tubes leading to the boxes. I'm interested in putting in a cold air intake, but not so interested in the DIY ducting on the XJS setups I've seen. If no one's tried this before then perhaps one of you 4.0 owners out there would be so kinda as to send me the dimensions of the opening at the end of the tube and the length of the unit itself so that I can figure out if this is an task I'm gonna attempt or not.
call Pauls' jaguar or any other breaker and see if they will sell you the 6.0 plate above the radiator and the tubes and air cleaner housings..
Last edited by Jonathan-W; 10-26-2015 at 12:55 PM.
#3
That's what I was referring to in my post. Think Paul's Jaguar will have them? no where else does for sure. I didn't realize Paul's jag was a breaker and none of the yards near me have facelift cars. In your experience is Paul's reasonable as far as price goes?
#4
hey let me know what they want to charge for that as I might like to go that way on my 1992 convertible...
#5
According to Gaudin Jaguar the parts aren't very expensive so you can get them brand new:
AIR INTAKE for 1995 Jaguar XJS
Separately, I'd test if there is a temperature differential from the current horn inlet point and the radiator cover point to see if it's worth the investment.
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Jonathan-W (10-27-2015)
#6
According to Gaudin Jaguar the parts aren't very expensive so you can get them brand new:
AIR INTAKE for 1995 Jaguar XJS
AIR INTAKE for 1995 Jaguar XJS
Let us know what you find and post some pictures if you attempt this project, Dymaxxion. I would definitely do this if it is as easy as it seems to be. Order the parts, cut a couple holes in the front wall for the intakes to go, and you have a cold air intake. Very cool.
#7
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#9
#10
Look at what TWR did for the road car, this works extremely well and will fit under the bonnet. IIRC according to Alan Scott the TRW CAI and exhaust were worth 20-30hp on a 5.3L and more on the TRW 6.0L.
#11
Greg
#12
Realized this last night. I've considered swapping to a 6 cal hood before for the power bulge, but I've elected to instead punch louvers in my extra V12 hood. I think XJSMan89 and I are going to collaborate on some custom cold air intakes. We'll keep you all posted.
#13
I seemed to remember that Roger Bywater talked about CAI, so I looked it up this morning and found it on his site's FAQ:
The more important point to consider is that you may have to get your ECU modified to gain any significant benefit:
Just something else to consider.
9. Can you sell me a cold air intake kit for my V12?
It is not something we offer although we do add supplementary intakes below the filters as a means of increasing breathing area without introducing excessive noise. At high speeds the air reaching the intakes behind the radiator is much cooler than at low speeds so the performance gain of cold air intakes is less than might be imagined. It is easy to forget that warmer air is better for fuel economy so the standard 5.3 arrangement is a better compromise than it might seem.
It is not something we offer although we do add supplementary intakes below the filters as a means of increasing breathing area without introducing excessive noise. At high speeds the air reaching the intakes behind the radiator is much cooler than at low speeds so the performance gain of cold air intakes is less than might be imagined. It is easy to forget that warmer air is better for fuel economy so the standard 5.3 arrangement is a better compromise than it might seem.
The more important point to consider is that you may have to get your ECU modified to gain any significant benefit:
10. Why do I need to have the ECU modified when I improve the engine's breathing?
Quite simply, more air requires more fuel. On the V12, having MAP load sensing, minor breathing improvements can exploit the slight over-richness that the standard ECU provides to limit temperatures at full power but significant improvements will always require some sort of change to the fueling Engines with MAF load sensing will often compensate automatically as long as the increased flow does not extend beyond the area mapped by the ECU.
Quite simply, more air requires more fuel. On the V12, having MAP load sensing, minor breathing improvements can exploit the slight over-richness that the standard ECU provides to limit temperatures at full power but significant improvements will always require some sort of change to the fueling Engines with MAF load sensing will often compensate automatically as long as the increased flow does not extend beyond the area mapped by the ECU.
#14
Jaguar XJ-S Cold Air Intakes
I love all the discussion on this board. It's great for projects like this. Thanks for all the feedback, guys.
Collins
Last edited by xjsman89; 10-28-2015 at 01:06 PM.
#15
The cold air intake fitted to late model 6.0 L engines takes the majority of airflow from in front of radiator I.e the cold side, there are several holes about 10mm (3/8" approximately) that allows air from engine compartment to bleed into the intake.
These are visible in the photos posted by Jonathan W
These are visible in the photos posted by Jonathan W
#16
The cold air intake fitted to late model 6.0 L engines takes the majority of airflow from in front of radiator I.e the cold side, there are several holes about 10mm (3/8" approximately) that allows air from engine compartment to bleed into the intake.
These are visible in the photos posted by Jonathan W
These are visible in the photos posted by Jonathan W
also to note...
these stock parts....
like the intakes of prior years neck down to a narrow opening inside themselves for noise reduction.. (right before the 90 degree bend)
which also increases the suction through said several holes...
all I can say is motor tool and black racers tape...
#17
also to note...
these stock parts....
like the intakes of prior years neck down to a narrow opening inside themselves for noise reduction.. (right before the 90 degree bend)
which also increases the suction through said several holes...
all I can say is motor tool and black racers tape...
these stock parts....
like the intakes of prior years neck down to a narrow opening inside themselves for noise reduction.. (right before the 90 degree bend)
which also increases the suction through said several holes...
all I can say is motor tool and black racers tape...
Already covered the holes with black tape
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