Stigmata Donating Members 235 Member For: 11y 3m 6d Gender: Male Posted 26/10/14 10:58 AM Share Posted 26/10/14 10:58 AM Okay so after lots of requests I have decided to run a back to back test between a bar and plate core and a tube and fin core. The bar and plate core was sourced from overseas, has internal offset fins, so is up with usual type being offered. Earlier bar and plate coolers didn't have offset internal fins but rather a straight pressed configuration. The offsetting of internal fins helps further the increase internal surface area which is so vital to efficient thermal transfer as well as helping turbulate the charge air. This is due to something called laminar flow which is another topic in itself.The tube and fin core being used is the latest offering from Europe with thin laser welded tubes and also an internal offset fin arrangement. Unlike many "extruded" tube designs which are rather heavy and are fast becoming dated.The bar and plate core measures in at 500mm x 430mm stacked height x 100mm thick The tube and fin measures in at 480mm x 430 x 100mm thickOn the scales the tube and fin core is almost 5kg lighter than the bar and plateBar and plate 12.5kgTube and Fin 7.6kgThe next most interesting thing is total flow area of the two cores. The bar and plate has 23 flow tubes, while the tube and fin has only 19. The flow area was calculated and I didn't expect this much of a difference to be honestBar and Plate 107.525 cm2 of flow areaTube and Fin 178.695 cm2 of flow areaThis does become a very important factor in thermal exchange rates as it effects air speed throughout the coolers tubes. For obvious reasons thermal transfer rates are varied greatly by the amount of time the charge air spends within the coolers tubes to exchange thermal energy with the atmosphere. If the flow area is small then air speed is higher than that of a larger flow area where charge air will have more time for effective thermal transfer. Hope that makes senseAnyway here are some pics. This will take me a fair amount of time as I need to squeeze it all in between jobs. I will conduct a back to back test on the same vehicle on the same day with identical tanks on the coolers and keep the playing field as fair as possible logging before and after cooler temps, power etc etc. This test is not to be biased in anyway whatsoever as I am open to both types of cores. Each has their place and both have greatly different costs. Hope everyone can enjoy the write up 15 Link to comment Share on other sites More sharing options...
Stigmata Donating Members 235 Member For: 11y 3m 6d Gender: Male Posted 26/10/14 11:07 AM Author Share Posted 26/10/14 11:07 AM Some more pics of them on scales 2 Link to comment Share on other sites More sharing options...
ratter Member 6,793 Member For: 17y 10m 23d Gender: Male Location: @ my laptop Posted 26/10/14 11:53 AM Share Posted 26/10/14 11:53 AM it will be good to see temp before cooler, pressure before cooler, temp after the cooler and pressure after the cooler for the same given time 3 Link to comment Share on other sites More sharing options...
Stigmata Donating Members 235 Member For: 11y 3m 6d Gender: Male Posted 26/10/14 11:59 AM Author Share Posted 26/10/14 11:59 AM Will be logging it all for sure. Don't want to miss anything. 2 Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 16y 5m 23d Gender: Male Location: Perth Posted 26/10/14 12:42 PM Share Posted 26/10/14 12:42 PM If you are quoting numbers there is a lot more to it than flow area. There is internal volume and internal / external surface area. 1 Link to comment Share on other sites More sharing options...
PTR_NITRO_FG Donating Members 3,214 Member For: 10y 10m 25d Gender: Male Location: NOR Perth Posted 26/10/14 12:50 PM Share Posted 26/10/14 12:50 PM Great work Jon! Results will be interesting 1 Link to comment Share on other sites More sharing options...
Stigmata Donating Members 235 Member For: 11y 3m 6d Gender: Male Posted 26/10/14 12:51 PM Author Share Posted 26/10/14 12:51 PM Obviously internal volume is a direct reflection on flow area X the tube lengths given? External surface area is going to have to be close enough given the fin pitches are a non varible from both manufacturers. Link to comment Share on other sites More sharing options...
arronm Dropping a turd Gold Donating Members 9,520 Member For: 16y 5m 23d Gender: Male Location: Perth Posted 26/10/14 01:00 PM Share Posted 26/10/14 01:00 PM Wait till you build them. Make the end tanks the same volume. Then fill them with liquid and measure. I think you will be surprised.. 1 Link to comment Share on other sites More sharing options...
Stigmata Donating Members 235 Member For: 11y 3m 6d Gender: Male Posted 26/10/14 01:11 PM Author Share Posted 26/10/14 01:11 PM Ok if you would like me to do that Arrom no problems at all. Will do a total volume check on both coolers once they have tanks on. If there are any other requests let me know anyone as I dont want to do this twice lol 9 Link to comment Share on other sites More sharing options...
JETURBO ...JD TUNING ADELAIDE... Gold Donating Members 23,708 Member For: 15y 10m 19d Gender: Male Location: Adelaide Posted 26/10/14 10:33 PM Share Posted 26/10/14 10:33 PM Love your work jon 3 Link to comment Share on other sites More sharing options...
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