Jase Posted July 26, 2008 Share Posted July 26, 2008 Ok add one rover v8 into a tight engine bay and you have issues, extractors for one and cooling is the other, i have 620mm x 280 x 90 to fit a radiator in its traditional position, and that such a thick core starts to get inefficient i started looking at other ideas, tell me what you guys think about running two small auxillary coolers below the headlights, and whether adding a davies craig ewp would suffice to pump the coolant around with the traditional v8 pump helping , i have been to get a single radiator quoted at 650 where they recommended only a 60 mm core, but i'm sure they were going to just cut up a rx cooler that they suggested off the bat, , i was thinking buy this one and have the core shortened to fit, then split the remainder in half and add a tank each side, need some one to shed some light for me Quote Link to comment Share on other sites More sharing options...
eskynut Posted July 26, 2008 Share Posted July 26, 2008 Latest shape toyota hiace has a small radiator on lh side as well as larger one in norm spot. Can't see how your design should be a prob apart form small rad on lh side inlet needs to be on top (hot to top). A Craig Davis EWP are sweet. Had one on my t-bucket when I raced - they got some real awesome flow rate so should cope ok. Quote Link to comment Share on other sites More sharing options...
Jase Posted July 26, 2008 Author Share Posted July 26, 2008 cheers man i'm trying not too get too much weight out the front there either, the old radiator was brass copper and weighed a tonne x triumph, but the alloy is lighter but would be more capacity i gather plus the extra tanks piping and water being held in them shouldn't weigh more than the 15kg that i lost over the other engine, i want oversteer not sledging understeer like so may v8s get Quote Link to comment Share on other sites More sharing options...
Testament Posted July 26, 2008 Share Posted July 26, 2008 could you remount the oil cooler to one side and fit in a taller conventional radiator? or out front ala. boso/jap 70's racer Quote Link to comment Share on other sites More sharing options...
Jase Posted July 26, 2008 Author Share Posted July 26, 2008 I suppose i could but i like that the chassis rails come forward of the radiator if i do something like the drawing stz, want to keep the lines of the car real clean if i can, as the grill and bumper are standard and i would get a stainless valance with a lip made up to go below them, boso's probably a bit too out there for me, what i really need is a cooling calculator to work out how much i really do need. eski sorry don't know yer real name did you use your ewp with a standard wp running as well? Quote Link to comment Share on other sites More sharing options...
sholdowa Posted July 26, 2008 Share Posted July 26, 2008 Any chance of using the old Zaks Escort setup... in the rear wheel arches? That'll keep the weight back. A few of the v8 Mk.1 esc autocross boys used to mount in the boot, but I don't think it was really that efficient - remembers a lot of steam there. also disn;t I read somewhere that the brass rads worked better than ally? Quote Link to comment Share on other sites More sharing options...
Jase Posted July 26, 2008 Author Share Posted July 26, 2008 i've been to three radiator crowds in hamilton with this, they have all said that alloy was around 30% more efficient over brass copper and substantially lighter, boot mounted just wouldn't work with this as its going to be certed road legal and i don't think they ll like the idea, it's got to be up front basically, i worked out that the lil ones would hold 1.4l each in the tanks alone and the big one about 1.8l and about 1.4l in the pipe work to connect them, not sure how much disapears into the core, that by reasoning works out at about 6kg of water Quote Link to comment Share on other sites More sharing options...
Testament Posted July 26, 2008 Share Posted July 26, 2008 copper as a material conducts heat better than aluminium, but a alloy radiator can be lighter for the same cooling capacity. Also the effectiveness of the heat exchanger depends on the tube design and construction, modern designs all use aluminium for the weight saving and therefore newer designs probably have better efficiency than old copper and brass radiators. Your proposed design could work, but I dunno to me I would really rather have a single radiator if at all possible. So the oil cooler in the pic is forward of the chassis rails? i.e. the radiator cant take the space where it is and be behind the chassis rails? how much room did the original radiator take up? Also I dont think you will have to worry too much about the weight causing sledging, the rover v8 isnt significantly heavier than most iron block 4cyl engines, it's probably lighter than quite a few even. Quote Link to comment Share on other sites More sharing options...
Jase Posted July 26, 2008 Author Share Posted July 26, 2008 cheers for the advice i went and had a play around with triple core trumpy radiator i have and worked out that if i reshuffle i can make a slightly resized alloy one work, 430x575x70 is what i came to and with the oil cooler mounted behind the bumper with appropriate 100mm holes for air flow it will not mess the lines up to much will get the radiator crowd to change the oil in to the side as well and weld mounts for the cooler to the radiator Quote Link to comment Share on other sites More sharing options...
MACKAZ Posted July 27, 2008 Share Posted July 27, 2008 MY race car had Triumph radiator, cooled the old 253 and my 4.0l Falc motor. Admittedly after 8 laps of 7000 rpms it was a little hot but did the job well. Spam but most of early Kuriger spaceframe stockcar chassis fitment of Triumph radiator was the norm, and theyve cooled Rover/Ford/Holden V8s for years in stockies. Quote Link to comment Share on other sites More sharing options...
Ke36 Posted July 28, 2008 Share Posted July 28, 2008 MY race car had Triumph radiator, cooled the old 253 and my 4.0l Falc motor. Admittedly after 8 laps of 7000 rpms it was a little hot but did the job well. Spam but most of early Kuriger spaceframe stockcar chassis fitment of Triumph radiator was the norm, and theyve cooled Rover/Ford/Holden V8s for years in stockies. yea only problem is thats going round as fast as you can with heaps of mint airflow, even though the motor is being pushed most cooling systems arent found wanting fanging round the track but more often sitting in traffic (spam also ) what about getting rid of the oil cooler and having one or two smaller ones either side under the lights where you had planed on putting the extra small rads and that way having a decent sized rad in the middle? Quote Link to comment Share on other sites More sharing options...
MACKAZ Posted July 28, 2008 Share Posted July 28, 2008 Yup Point taken, but most spaceframes have eff all direct airflow due to chassis crossbracing, bonnet edge which HAS TO extend over in front of radiator and shocks are normally in the airflow path.. When the old man bunged a 308 on a 180b years back he had a custom rad made. Thing never ever got hot but rad cost megabux Quote Link to comment Share on other sites More sharing options...
Jase Posted July 28, 2008 Author Share Posted July 28, 2008 i sussed the problem by getting an alloy triple pass alloy unit that will sit in a similar position to where the trumpy one is, but with the top in front of the crossmember but still behind the grill with remote filler and expansion tank all shall be good, the oil cooler is going to bolt to this new radiator and sit behind the bumper, which i will cut 5 x 100mm dia holes in for airflow, i will then mount my thermos either inbetween the oil cooler and radiator or behind the radiator depending on how slim i can get them Quote Link to comment Share on other sites More sharing options...
KKtrips Posted July 28, 2008 Share Posted July 28, 2008 I run 2 radiators in my morrie - a small bus heater radiator behind the grille and the standard radiator as per mini stz.. works sweet Quote Link to comment Share on other sites More sharing options...
RT Posted August 13, 2008 Share Posted August 13, 2008 I used the biggest alloy radiator I could fit.. and twin thermo fans. That should do the trick but if it doesn't I'll go straight to a davis craig EWP, although expensive the make a massive cooling difference, flowing much more at idle then conventional pumps. Another thing I did was to make up rubber shrouding into the radiator so that the air has no where to go but through the rad. This makes a big diffence as well. Quote Link to comment Share on other sites More sharing options...
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