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MECHANICALS With a 30 year-old automobile, there will always be discussion here - maintenance, modifications and mechanicals.

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  #46  
Old 30th July 2019, 02:57 PM
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Default Re: Mercedes V8 Inlet Manifolds

Or as i said on faceplant if it's cool
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  #47  
Old 3rd August 2019, 10:12 AM
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Default Re: Mercedes V8 Inlet Manifolds

So they measure as follows:

6.9
Intake 45mm
Exhaust 41.5mm

117
Intake 42.5mm
Exhaust 43 x 38mm (not round)

Not as much of a difference as I expected!



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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #48  
Old 3rd August 2019, 12:19 PM
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Default Re: Mercedes V8 Inlet Manifolds

Very useful
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  #49  
Old 3rd August 2019, 05:12 PM
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Default Re: Mercedes V8 Inlet Manifolds

Quote:
Originally Posted by Oversize View Post
How does a 6.9 (or even a 450) even breathe through this thing??? It’s now been proven the stock air filter housing restricts flow into the air flow meter. And that’s just the start!


I just measured the usable area of the snorkel... a piddly 67x56mm at its narrowest point!! The widest is 80mm. It was so wrong at the very start of the intake! Not accounting for any bends or excessive length, it should be a minimum 79mm round.

Not sure how I stuffed that up but probably too many calculations on a small note pad! I’ve now created a spreadsheet and formatted the formulas so I can apply it to any engines intake & exhaust.

The correct MINIMUM total ID for a 6.9 intake is 76mm & exhaust 70mm. In the old money that’s 3” intake & 2 3/4” exhaust. Taking into account the throttle shaft & plate, I think Geoff was spot on with 85mm.
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01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)

Last edited by Oversize; 6th August 2019 at 10:38 AM.
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  #50  
Old 3rd August 2019, 05:14 PM
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Default Re: Mercedes V8 Inlet Manifolds

Itís no wonder the 560 dual snorkel is far better. Even a single snorkel is superior to the 450 ones.
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Mark

01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #51  
Old 3rd August 2019, 06:52 PM
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Default Re: Mercedes V8 Inlet Manifolds

Precisely why a 560 intake assembly is going on my 6.9
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  #52  
Old 4th August 2019, 11:08 AM
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Default Re: Mercedes V8 Inlet Manifolds

Mark, I dips my hat to both of you for the work and thoughts you are putting into this. Regards Styria
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  #53  
Old 5th August 2019, 01:00 PM
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Default Re: Mercedes V8 Inlet Manifolds

Thanks!! I think many years of research have led me along this path! You ainít seen nothing yet!

Oh letís not forget the 450s & 6.9s were sucking hot air! And many cold air intakes are mounted above the hot radiator!!!
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Mark

01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #54  
Old 6th August 2019, 02:19 AM
sean sherry sean sherry is offline
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Question Re: Mercedes V8 Inlet Manifolds

Always a big fan of cold air intakes since reading that for every 2 degrees of ambient Air Temperature increase you lose 1 H.P. Of course with hundreds of H.P from huge V8s what is a few H.P. between friends !
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  #55  
Old 6th August 2019, 10:43 AM
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Default Re: Mercedes V8 Inlet Manifolds

Finally people are starting to experiment to the benefit of all chasing more MB HP! Not sure if there’s enough headroom in this assembly, but I’ll see if the theory can be tested & hopefully we’ll find out for sure!



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Mark

01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #56  
Old 6th August 2019, 10:45 AM
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Default Re: Mercedes V8 Inlet Manifolds

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Mark

01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #57  
Old 6th August 2019, 10:56 AM
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Default Re: Mercedes V8 Inlet Manifolds

Minimum total ID for a 560 is:

Intake 72mm, 2.9Ē
Exhaust 69mm, 2.7Ē

Average diameter as the 560 exhaust isnít round. Figures are rounded up.
__________________
Mark

01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #58  
Old 7th August 2019, 03:28 PM
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Default Re: Mercedes V8 Inlet Manifolds

So basically the standard 560 TB is too small by 2mm (70 v 72mm). However, if you account for the throttle shaft and the effect of friction on airflow either side of the plate, the standard TB could be too small by as much as 10mm. Meaning that even a 560 needs an 80mm TB!
__________________
Mark

01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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  #59  
Old 7th August 2019, 05:08 PM
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Default Re: Mercedes V8 Inlet Manifolds

Just as well i made mine 85mm then but that was because that's all you can open up chamber
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  #60  
Old 10th August 2019, 09:52 AM
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Default Re: Mercedes V8 Inlet Manifolds

Iíd imagine the 560 would be no different but I will be looking soon.
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Mark

01 Ford AU 5L (Deep Blue)
88 420L Euro#-P
88 420L#-P
88 420L#2477-P
87 560L#2020 (Dora 2)
87 560L #9987
87 420L#4309-P
87 420L#-P
86 560L#5896-P
79 6.9#5541 (Red Bull)
78 6.9#4248 (Skye)
79 6.9#3686 (Moby Dick)
78 6.9#1776 (Dora 1)
77 450L#7010-P
75 450L#8414 (Gold Nugget)-P
57 Buick 73A (Titanic)
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