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1979 Detroit 8v92TA Breathers

Posted By FireStar01 Last Year
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Brocky
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Send an email thru here to Grenfell34 and /or Hayseed.. The Australians use a lot of these snorkels and maybe one of their suppliers will have a connection for chrome ones up here in the States??

Brocky
Tony Bullard
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FireStar01 (12/12/2020)
So allow me to elaborate. I want to do something different with my CL-9000 and put snorkels attached to a breather or two behind the cab. Here's the issue my dad can't help me with. I was eyeballing a pair of Freightliner FLC air cleaners at a salvage yard to mount back there, and we didn't know if we could use them to replace the Donaldson air cleaner on the 8v92TA. Or if it would be better to get the air cleaner on it already chromed or repainted, move it, and then run pipe from it?

Or, on the other hand, what air cleaners out there could I get off a salvage truck that would work with it? And where could I get a pair of those boxy snorkel breathers I've seen on a few aussie trucks. Thanks in advance.



If the Freightliner FLC had a turbo I'd call it good enough.


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FireStar01
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So I tried looking up the CFM of air cleaners on my truck (EBA11-2014) and I haven't found anything yet. I'll keep my nose to the grindstone, and I've emailed Donaldson to see if they can help, but I'm not holding out on it. If anyone knows what it is off the top of their head and would like to tell me I'd appreciate it, but I can't find anything from Donaldson or on the air cleaner that'll tell me.

'Celia', '79 Ford CL-9000/Detroit 8v92TA/Eaton 13 Speed

Tony Bullard
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FireStar01 (12/23/2020)

So, let's say I pulled a pair of Vortex's off of a newer Pete, would they support the 8v92 then since they already are used to feed newer bigger motors? And, adding onto that, what size engine can the thin air cleaners Freightliner offered on the FLC120 support?


Look up the CFM of the filters on your 79 Ford CL-9000/Detroit 8v92TA.
Look up the CFM of the pair of Vortex's off of a newer Pete.
Look up the CFM of thin air cleaners Freightliner offered on the FLC120.
If they are equal to or greater than the filters on your 79 Ford CL-9000/Detroit 8v92TA you are good to go.



Tony
FireStar01
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Wow, lotta info to dig through. My problem with that black plastic ram air scoop Donaldson offers is that it's... well, black plastic. Honestly if I couldn't find the style I was after I was gonna use round tops, unless I can get the scoops chromed somehow. This part of my project is gonna take a bit probably, given I've managed to track down the four point cab air ride Ford offered at a salvage yard, so right now I'm focused on getting that and other lookie lookie parts that are broken. Maybe I don't have to put the air ride cutoffs on just yet.

So, let's say I pulled a pair of Vortex's off of a newer Pete, would they support the 8v92 then since they already are used to feed newer bigger motors? And, adding onto that, what size engine can the thin air cleaners Freightliner offered on the FLC120 support?

Keep in mind these are going behind the cab with the stacks, so whatever fits fits?

'Celia', '79 Ford CL-9000/Detroit 8v92TA/Eaton 13 Speed

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It definitely uses more air.............if the engine is working.  If it's a show truck, it ain't gonna be working  .  I still remember repowering a truck from 8V71 T to 8V92T in the early '80s . We were doing good on the interstate with dump trailer.............untill we got up to speed approaching 65 ,  then seemed to lose power . Found an original air inlet elbow collapsed, as it had no reinforcement ribbing . Replaced with a Donaldson reinforced elbow .........that cured it .  Using an undersized air cleaner will work, but your service interval must be shortened .    I'm a big advocate of service by restriction, not by any time interval .
The Donaldson RAM Air  elbows do work, as well, as proven if you have a dial restriction guage on the dash .  Before and after youl'll see lower restriction when you get up to cruise speed.  BUT, if you run in snow , it'' clog your paper filter , and in rain it'll catch water as well .   I'd seen several Ram air  scoops turned sideways to minimise problems .   Then it just serves as a rain cap . 
Geoff Weeks
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I looked up the two different Donaldson's used on my IHC cabovers.
Rateings as follows at  6,8, and 10" restriction
1200,1400, 1600 for the one air cleaner the EGC konepac.
1400,1640, 1860 for the other.  This one was used on all Cummins including the KTA equipped trucks and I think the 8V92 equipped trucks as well. It is the EBA konepac aircleaner. It is much smaller than most cowl mounts used on conventional trucks. 
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Tony Bullard (12/12/2020)
That's the one I was looking at. Page 292 shows the 8V92T @ 1600 cfm and the Cummins at about 1/2 that.

I don't know where you were looking, but what I saw was the max 8V92 was 1435 about the same for a KT Cummins, and an 855 above 400 hp was 1165, No where near 1/2. 
 Yeah it moves more than an 855 for the same hp but not that much more. Most air cleaners aren't spec'd to just make the requirement, as they quickly fall off once they get a little dirt in them.
Remember this is for an 8v92TA, not an 8V92T
Tony Bullard
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Oops! this is the one: https://www.donaldson.com/content/dam/donaldson/engine-hydraulics-bulk/catalogs/air-intake/north-america/F110027-ENG/Air-Intake-Systems-Product-Guide.pdf


Tony
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That's the one I was looking at. Page 292 shows the 8V92T @ 1600 cfm and the Cummins at about 1/2 that.


Tony


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