What did you do to your Patrol today!

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Originally Posted by PeeBee

@mudski, you have me confused. Here is the initial assessment you made re the TD42 turbo airflow requirements
'According to my book, air flow on this housing is 202 CFM, my air flow calculations for the stock N/a TD42 is 265CFM. Whack a turbo on it and it jumps to over 800', and then above
'for a 16.5L V12 Genset. It ended up running two Donaldson "Powercore" housings, one per bank, which were rated circa 800cfm each'

What I don't understand is how a 4.2 turbo engine requires say 800cfm and a 16.5L only requires 1600cfm? I am assuming the genset is running at a 'high idle speed and the TD42 at full snot? Curious to understand how you derive the flow ratings?

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This Genset's max rpm is only 1400 rpm. Not a lot. A TD42 is 4000. RPM is a big factor, more than engine size.

It’s possibly already been created out there somewhere but I’m imagining a super helpful online calculator for this stuff would be worth subscribing/paying for nuffy’s like me [emoji51]
I’m assuming a basic Algorithm thingy could be able to calculate engine volume versus rpm + forced induction of turbo/supercharger specifications.
Imagining it would get quite mathematically tricky though calculating recently McGoogle read delivery piping/bends/distances and ambient temperatures/pressures/moistures added variances too [emoji2962][emoji23]




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Originally Posted by MB

It’s possibly already been created out there somewhere but I’m imagining a super helpful online calculator for this stuff would be worth subscribing/paying for nuffy’s like me [emoji51]
I’m assuming a basic Algorithm thingy could be able to calculate engine volume versus rpm + forced induction of turbo/supercharger specifications.
Imagining it would get quite mathematically tricky though calculating recently McGoogle read delivery piping/bends/distances and ambient temperatures/pressures/moistures added variances too [emoji2962][emoji23]




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This is a pretty good website mate.
https://www.widman.biz/English/

Oh WOW, that’s got everything thanks Legend [emoji120][emoji106][emoji106]


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Yep. I assume mudski has access to some nice calculators for this stuff. But a td42 that will rev to 4000rpm ideally should have a minimum flow requirement of 800-900cfm.

If the genset is a turbo diesel then it ideally requires a minimum of 1200cfm. This could change if its a gas powered genset though.

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Originally Posted by MB

Oh WOW, that’s got everything thanks Legend [emoji120][emoji106][emoji106]


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Yes it is. I was typing my last reply while you guys had obviously already responded. Handy website. Thanks @mudski

@rustynail good job on the welding its not easy
welding something that is gal coated. You need
to maybe grind the gal off first or burn it off when
welding it. Again good job

What's this talk about TD reving to 4000 business. Lol
I thought they just slapped the revometer under the dash and forgot to blank out lines after 3200...
No way in hell will mine go past 3200 and that's even pushing it ...

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Originally Posted by Hodge

What's this talk about TD reving to 4000 business. Lol
I thought they just slapped the revometer under the dash and forgot to blank out lines after 3200...
No way in hell will mine go past 3200 and that's even pushing it ...

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Really? That's an issue mate as it should get to 4000 with no issues.

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Originally Posted by Winnie

Really? That's an issue mate as it should get to 4000 with no issues.

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Yeah not sure what the go is.
Andy at Dieseltec did mention that my bottle neck is air with my current setup, and the ht18 ...
I'm not sure if that contributes to rev trouble but , it has a hard time above 3k... When at 3.2 it's got nothing left.

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