Thread: Teaser of the Week!

Is that the outside dimension Steve i will measure mine internally tomorrow.
Thanks for the input.
Gippy

Originally Posted by Gippslander

Hello all i have been pondering the Snorkel issue for some time and was wondering, the standard exhaust is 2" the inlet MAF appears to be 2 1/2" why do we need 3" inlet piping?
On that note i grabbed a piece of 2 1/2" exhaust pipe and inserted it between the guard and engine bay wall on a wrecked P38 i have in the yard and it fits, with clearance so if you need 3" going up the window pillar for aesthetic appeal that's fine it can be reduced inside the mud guard so it still looks hot or whatever outside. I have a rough idea that the inner guard piping would be fine at 2 1/2" and where it goes through the guard it can be made 3" with a nice close 90 degree bend then led up the guard to a 15 degree bend to allow fitment to the window frame and a nice 15 degree bend at the top to accept a suitable top like from Safari or similar. I will be pursuing this in the weeks to come.
Just a thought folks here are the pictures of the exhaust pipe in place. Some of you can maybe run the numbers on air flow i don't believe there will be any problem these are not race engines.
Gippy

Hi Gippslander,
I assumed that min flow would need to 3" due to inlet & outlet of airbox.
Also the exhaust may only be 2" but there are 2 of them.
Maybe I should also have measured the inlet & outlet of MAF.
2 1/2" sounds a bit restrictive but I'll reserve comment if someone can calculate flow rates!
Does your guinea pig have the inner liner fitted as that is the main concern as I didn't want to remove mine!

Originally Posted by SteveFarmer

Hi

I just checked my 99 4.6L and the inlet is 3" (75mm) so 2 1/2 (65mm) is not going to be big enough. It is 33 cm sq and we need 44 cm sq cross section.

It seems to me the squashed PVC may well be the go for those of use who need the 44 cm sq cross sectional area.

A rectangle of 65 mm x 70 will will provide the needed area so a cut down rectangular section may well be able to be used as well.

Steve

Hi Steve, I would steer clear of rectangular for couple of reasons.
Even if it would mould to pass chassis & inner liner ( which I think would be more difficult than round pipe)
You also then need to bend to fit between chassis & Gaurd.
Also you then need to change to round to match up to bends at each end anyway, just seems like way more work to me for no real gain.

Hi

I measured the inside diameter of the MAF section with digital verniers

Steve

Originally Posted by FANTOM P38

Hi Steve, I would steer clear of rectangular for couple of reasons.
Even if it would mould to pass chassis & inner liner ( which I think would be more difficult than round pipe)
You also then need to bend to fit between chassis & Gaurd.
Also you then need to change to round to match up to bends at each end anyway, just seems like way more work to me for no real gain.

Hi

Yes more bits = more leaks plus more work for rectangular

I was thinking the molded/rectangular section would only be the piece which goes through the tight section of the guard. The rest would be silicone air intake duct

Steve

Originally Posted by SteveFarmer

Hi

I measured the inside diameter of the MAF section with digital verniers

Steve

AND?

Originally Posted by FANTOM P38

AND?

Oh sorry that was the 3" (75mm) dimension i referenced earlier

Steve

Originally Posted by Gippslander

Hello all i have been pondering the Snorkel issue for some time and was wondering, the standard exhaust is 2" the inlet MAF appears to be 2 1/2" why do we need 3" inlet piping?
On that note i grabbed a piece of 2 1/2" exhaust pipe and inserted it between the guard and engine bay wall on a wrecked P38 i have in the yard and it fits, with clearance so if you need 3" going up the window pillar for aesthetic appeal that's fine it can be reduced inside the mud guard so it still looks hot or whatever outside. I have a rough idea that the inner guard piping would be fine at 2 1/2" and where it goes through the guard it can be made 3" with a nice close 90 degree bend then led up the guard to a 15 degree bend to allow fitment to the window frame and a nice 15 degree bend at the top to accept a suitable top like from Safari or similar. I will be pursuing this in the weeks to come.
Just a thought folks here are the pictures of the exhaust pipe in place. Some of you can maybe run the numbers on air flow i don't believe there will be any problem these are not race engines.
Gippy

2.5" won't fit because you don't have the inner liner on in that pic