Thoughts on This Spectre Air Intake Mod...
#22
03-10-2017, 03:54 AM
Senior Member
Wouldn't want to drive through a big puddle on a rainy day by accident. Would only take a half wheel height puddle to completely submerge the intake. If you were lucky it would just stall, worst case you hydraulically destroy the motor, may be even more likely if there are two intakes and only one side goes under.
Stop start no doubt disabled for most of us anyway.
A friends son drove his F through a puddle and had to have a new engine.
#23
03-10-2017, 05:47 AM
Veteran Member
[QUOTE=malbec;1635868]The handbook states that the maximum wading depth is 6 inches and max speed 4mph. QUOTE] Good...that means I have to stay out of anything deeper than 4.5". Gotta use the right tool: My Land Cruiser will handle 34" (~60" with the optional snorkel). The driver on the other hand...
#24
03-13-2017, 04:56 PM
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I've had a closer look at the intake snorkel set-up per the Repair Manual, and it's now obvious to me that the tops / openings of the intake snorkels sit well above the height of those dummy vents each side of the grill. It looks like the intake snorkels gather air coming in through the top part of the grill opening. So removing the blanking plastic behind the vents would not improve airflow into the snorkels one little bit, although it might help with brake cooling (and I understand this is where the special track-day cooling ducts are mounted).
#25
04-03-2018, 10:01 AM
I've had a closer look at the intake snorkel set-up per the Repair Manual, and it's now obvious to me that the tops / openings of the intake snorkels sit well above the height of those dummy vents each side of the grill. It looks like the intake snorkels gather air coming in through the top part of the grill opening. So removing the blanking plastic behind the vents would not improve airflow into the snorkels one little bit, although it might help with brake cooling (and I understand this is where the special track-day cooling ducts are mounted).
Its something Porsche do on their air box designs in the 911 as the rear decklid is an air collector with a snorkel sealed against it which rams air into the sealed air box, can't find the documents but Porsche claimed at 70mph this direct ram air gained around 10 horsepower at highway speeds due to RAM air effect and of course only pulling air from the grill area is cooler and thus lowers IAT's too which can help make more power.
#26
05-25-2023, 12:57 AM
If you have a hoist then removing the front wheels, wheel well liners and bumper undertray would probably be not that bad, but if the car stays on the ground then bumper off looks easier to me.
The stock airboxes have the panel filter at the bottom of the box so the undertray of the front bumper would also have to come off.
Attachment 119285 Attachment 119286
Everything gets easy with lots of practise, I can get the bumper off the XJR in about 10 minutes now. The first time took me an hour...
The stock airboxes have the panel filter at the bottom of the box so the undertray of the front bumper would also have to come off.
Attachment 119285 Attachment 119286
Everything gets easy with lots of practise, I can get the bumper off the XJR in about 10 minutes now. The first time took me an hour...
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