bishbosh Posted August 20, 2008 Share Posted August 20, 2008 So what size is needed? I think I was advised that a 19 row is more than enough at the back of the engine bay (loads of room as the engine is a long way forwards) with an electric fan. Alternatively, I could put one at the front which I assume could be smaller as it would have normal airflow / engine fan to assist bur more prone to clogging with mud. Plenty of options available to me from ebay and a friend buying from the states, but is it really a case of fitting the biggest one I can? What do people think? Quote Link to comment Share on other sites More sharing options...
will_warne Posted August 20, 2008 Share Posted August 20, 2008 My Laminova on the ZF4 used to work a treat and it was out of the way but it was a tad expensive. IMHO seems to be a good solution on diesels where you have less heat to shift. If you're going for a conventional oil to air I'd get it up and out of the way with as big a volume as possible simply to give you more fluid. Quote Link to comment Share on other sites More sharing options...
bishbosh Posted August 28, 2008 Author Share Posted August 28, 2008 Definately want to stay air - oil as I don't need the added plumbing or expense of a Laminova! I have decided that the cooler needs to be in front of the rad as I don't have any space elsewhere having found a home for the air filter behind the engine. Putting it there means that for a 19 row cooler I would have to remove the slam panel struts and use bonnet pins. Not the end of the world, but if I can get away with a smaller cooler then it would fit with the struts in place - I could even use the struts to mount it on. So, what coolers do you guys with autos use? Quote Link to comment Share on other sites More sharing options...
Steve 90 Posted August 28, 2008 Share Posted August 28, 2008 Not much use to you Bish but watching with interest as I need one for mine. Think im going oil to air with a small fan and mounting on cage behind cab! Quote Link to comment Share on other sites More sharing options...
JST Posted August 28, 2008 Share Posted August 28, 2008 oil to air with a small fan and mounting on cage behind cab! something else for Pikey to break then! Quote Link to comment Share on other sites More sharing options...
Mark90 Posted August 28, 2008 Share Posted August 28, 2008 So, what coolers do you guys with autos use? Kenton's racer with ZF box uses a 13 row cooler mounted up front, no fan to draw air through as rad is in the back, but usually moving enough to keep air flowing through. No idea if it works as there is no temp guage on gearbox oil - actually I think it's fine as the oil stays nice and red and clear. I don't think I'd want to go much smaller than that. No real tech calculations about heat transfer efficiency etc, just what looks and feels about right. Quote Link to comment Share on other sites More sharing options...
bishbosh Posted August 28, 2008 Author Share Posted August 28, 2008 Interesting, as a 13 or possibly even a 16 row cooler could be squeezed in with the struts in place I think.... Time for more measuring! Quote Link to comment Share on other sites More sharing options...
will_warne Posted August 28, 2008 Share Posted August 28, 2008 Bish, the big question, though, is whether the core is open enough as most of these coolers weren't designed with mud in mind? The last thing you want is for it to clog instantly off road resutling in a fried 'box... Quote Link to comment Share on other sites More sharing options...
Turbocharger Posted August 28, 2008 Share Posted August 28, 2008 Bish - I've got a standard bogbrush cooler, red transmission oil and precisely no challenge events under its belt. Read into this what you will... Quote Link to comment Share on other sites More sharing options...
bishbosh Posted August 28, 2008 Author Share Posted August 28, 2008 Bish - I've got a standard bogbrush cooler Where? Mounted in the standard RR position? Quote Link to comment Share on other sites More sharing options...
pat_pending Posted August 28, 2008 Share Posted August 28, 2008 I use a bog brush on my 200 tdi, moved the lower rad mounts backwards an inch and bracketed it to the rad frame behind the slam panel struts. Works a treat. Quote Link to comment Share on other sites More sharing options...
bishbosh Posted August 28, 2008 Author Share Posted August 28, 2008 Another great idea! Shame I just finished the rad install.... could be persuaded to revisit it though as that sounds like an easy win. Is an inch really enough and does it clear the viscous fan...? Thanks, and keep them coming! Quote Link to comment Share on other sites More sharing options...
Boothy Posted August 28, 2008 Share Posted August 28, 2008 I use 2 19 row coolers mounted behind my truckcab, fastenend side by side on the roll cage, out of the airflow and with no fans etc on them and have had no problems with overheating or oil degredation etc, even after along hard challenge with a big V8 warming things up nicely. I just guessed that some lads don't bother cooling at all, so a reasonably big cooler with long pipes dissapating in air must be a vast improvement on a bog brush mounted behind a half blocked hot radiator on a challenge truck that hardly moves in fresh at all. I had a on site pipe hydraulic pipe man make a couple of swaged pipes from the autobox to the cooler with good strong angled ends on so the pipework of the box was dead easy and dead pro and cost about £40 if I remember correctly. Good luck and use a new or extremely clean cooler. Quote Link to comment Share on other sites More sharing options...
white90 Posted August 28, 2008 Share Posted August 28, 2008 Mike just lifted the Bogbrush up above the recessed 8274 on his V8 90 (rad in standard place) Works well Quote Link to comment Share on other sites More sharing options...
bishbosh Posted August 28, 2008 Author Share Posted August 28, 2008 Did he keep the slam panel braces with that setup Tony? I didn't think there'd be enough space between the braces and the front grille? Quote Link to comment Share on other sites More sharing options...
white90 Posted August 28, 2008 Share Posted August 28, 2008 I'll look see next week he wouldn't have spent much time doing it so I'd guess yes Quote Link to comment Share on other sites More sharing options...
bishbosh Posted August 28, 2008 Author Share Posted August 28, 2008 Thanks Tony. A pic or two would be great Quote Link to comment Share on other sites More sharing options...
Turbocharger Posted August 28, 2008 Share Posted August 28, 2008 The things I do for this forum, eh? In front of the rad, in front of the stays (with the stays curved slightly and slotted bolt holes, and a few fins bent away) and behind the grille. I've no temperature gauge on the box either so I can't say whether it works or not either. "One day" I'll drill the gearbox sump and weld a nut to it to take a coolant sensor, and then wire that to the Racetech temp gauge so I can get a reading in deg C. Of course, one day I'll bash out the dents and paint it... Edit - for the slow of brain, there is no rad shown in this pic. This fault has since been rectified. Quote Link to comment Share on other sites More sharing options...
pat_pending Posted August 28, 2008 Share Posted August 28, 2008 Another great idea! Shame I just finished the rad install.... could be persuaded to revisit it though as that sounds like an easy win. Is an inch really enough and does it clear the viscous fan...?Thanks, and keep them coming! Yes no problem, i tweaked the lower ends of the panel struts and used 1/4" spacers to push them forward of their lower mounts, i think they normally bolt behind them. Everything else is standard up front. I can stick some pics up if you want, but it wont be till my daughter comes round after the w/end (she has the camera). Quote Link to comment Share on other sites More sharing options...
Steve 90 Posted August 31, 2008 Share Posted August 31, 2008 Any body know what sort of pressure the fluid would be going through the cooler? I assume its piped through the cooler on its return back to the sump so not a great amount???? Quote Link to comment Share on other sites More sharing options...
Mark90 Posted August 31, 2008 Share Posted August 31, 2008 Not high pressure, about 1 bar IIRC. Quote Link to comment Share on other sites More sharing options...
Guest noggy Posted August 31, 2008 Share Posted August 31, 2008 ermm at risk of looking a complete moron, does the ZF auto box have its own oil pump inside it? my plan on my auto was to mount the bog brush behind the cab with 4 very small 12volt fans, or to mount it length ways, in a tube and have a fan pushing/pulling air through the tube. i thought that was quite a good idea, so dont scream too much. Quote Link to comment Share on other sites More sharing options...
bishbosh Posted August 31, 2008 Author Share Posted August 31, 2008 The ZF does have its own pump, or at least it pumps its own oil around the place. Not sure about your idea though - I certainly wouldn't go for the in the tube idea - don't think you'd get the airflow. Quote Link to comment Share on other sites More sharing options...
Guest noggy Posted August 31, 2008 Share Posted August 31, 2008 ermm at risk of looking a complete moron, does the ZF auto box have its own oil pump inside it?my plan on my auto was to mount the bog brush behind the cab with 4 very small 12volt fans, or to mount it length ways, in a tube and have a fan pushing/pulling air through the tube. i thought that was quite a good idea, so dont scream too much. yeah, ive sat and thought about my idea, the tube would actually make the cooling effect worse. Quote Link to comment Share on other sites More sharing options...
DefcoL Posted August 31, 2008 Share Posted August 31, 2008 I have a zf stage 1 from ashcrofts who advised the below as suitable. With the exchange rate including shipping it still worked out miles cheaper that an uk equivalent. and it arrived within 3 days of order..... fast Brand: Derale Product Line: Derale Electra-Cool Remote Fluid Coolers Part Type: Fluid Coolers with Fan Part Number: DER-15800 Overall Height (in): 10.000 in. Overall Width (in): 12.500 in. Overall Thickness (in): 4.000 in. Cooler Construction: Tube and fin Cooler Material: Copper/Aluminum Fan Quantity: Single Maximum Fan CFM: 650 cfm Fan Diameter (in): 10.000 in. Inlet Size: -8 AN Inlet Attachment: Male threads Outlet Size: -8 AN Outlet Attachment: Male threads Number of Cooling Rows: 16 Core Height (in): 10.000 in. Core Width (in): 12.375 in. Core Thickness (in): 1.750 in. Cooler Finish: Black painted Quantity: Sold as a kit. Notes: Includes two (2) -8AN to 1/2 in. hose barb adaptors. For use on vehicles up to 25,000 GVW. Mounted mine on back of cab Quote Link to comment Share on other sites More sharing options...
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