well lads, so ive got a e46 330i turbo, at the track when on power, full boost and driving the ring off her she gradually rises temps up to 100 deg and keeps going i stop at 102. after say 2-3 laps of full on at Mondello temps would get up there. but if i stop and cruise temps drop fast takes only a few seconds and its back to 87ish. Now i have a koyo 55mm alloy rad from a 180 custom fitted. Ive also got a oil cooler from a rx8 fitted using s54 oil filter housing. Im running standard ms43 Siemens ecu and i have set the tstat to 80 deg as its electric and fan comes on full belt at 88 deg. Im using the e46 fan which pulls alot of air, holds a rag to the intercooler there is such a good suck. to add my airfilter, oil cooler along with the intercooler are blocking airflow to the rad. I cant really move them anywhere else im cought for space. just wondering does anyone have any ideas to help keep the temps down?? would a triple pass radiator help? i see koyo supply a triple pass version of my current rad. this is a road car for any of your rear mount ideas thanks for any help {} {}
Is a rad from a 2litre big enough for a 3 litre turbo?? Also from a quick glance it looks like you've got an oil cooler, intercooler and air filter sat in front of the radiator?? Do you have any cowling on the rad/fan? Do you have any undertray fitted??
Its similar surface area as the e46 rad just different shape, but 180sx is 6mm ish thicker. Yea its completely block lol but I'm not too sure where else to put the oil cooler I tend to hit the two corners as you can see from my bumper lol. Yea I have custom made a cowl for the fan and sealed edges with aluminum foil tape. No I have the undertray removed?
Undertray makes a surprising difference on airflow, would be a good idea to try refit it. Move the oil cooler and cone filter if you can, will help. How big is the oil cooler? Doesn't look massive? Can you not do a headlight intake? {} {}
so fitting a undertray will help airflow threw the engine bay? im gonna move the oil cooler into the crash prone area lol with a steel tube frame ill try go up a size. its not small its very fat. its mostly hidden behind the intercooler. wonder would a second oil cooler help? air filter has to stay or fit a hks mushroom but i want the chatter amplified its why i did it was reading about water bmw pumps and there supposed to cavitate at high rpm looking at Stewert water pump is supposed to eliminate this and is designed to flow more from 4k rpm up. im gonna order one and see does it help.
Is the car MAF or MAP? You could just bolt the filter directly to the turbo if it's MAP. Yes makes a surprising difference having the undertray, although have you destroyed half the front bumper and most of the arch liners too? Do you pop the rear of the bonnet up or anything??
I'm running blow threw maf so I could but I don't Wana loose the sick dose it has right now yea everything is kinda chewed up ill get a big sheet of aluminum and make one. I havent vented the bonnet like a ricer lol Is there anyway to embed videos?
Venting the bonnet or spacing it will make the cooling worse. Definitely fit the undertray, it works with the bumper as the bottom section of ducting.
You might have to decide which one you want, good noises or proper cooling? Embed videos is easy, press the media button next to the insert image and smiley button and then copy and past the link to the video. This was what I was getting at, people rip the under tray off, fan cowling off and space the rear of the bonnet up because "drift race Yo!" Then find out the car overheats after 2 laps
stock bmw's run a 2 bar rad cap and run hotter for better efficiency , mine sits at 98-110 deg on track driving hard , no issues maybe get a higher pressure radiator cap and monitor from there , water's boiling point increases as does the pressure.
His air filter is not going to be the reason the cars running hot! The oil cooler and intercooler are designed to let air pass through them so should make little difference . Are you running the standard viscous? Is there a gap between the rad and cooler's? You could duct the front end so air can only pass through them.
Thanks lads still haven't got time to go near the car but there Is gaps between the coolers although the oil cooler I a bit close to the Rad. I was using a viscous before and made a shroud for it but the clutch would only engage fully when water temp hit 102 deg *brand new viscous*. So I'd allways get it to spike to 105 when I started drifting and if I stopped and qued it would drop to 85 Ish and kick out so I'd be back to same situation. I can't remember how long on track id get with the viscous tho as I only remember the annoying fact I had to heat the viscous before going hard. {}
You want to have them tight together so the fan can't draw air round the sides. The cars not getting crazy hot, does it boil/put water into expansion tank when it's being driven hard? Options are; Higher pressure cap as said above. Electric water pump (be a tight squeeze in a non turbo bm never mind a turbo Get a bigger rad made - more coolant the better. Add oil volume (make sump bigger) and a bigger cooler, maybe move the cooler and fit a fan to it. Ducting - so all air has to pass through the rad and coolers Either that or cut holes/vents for heat to escape
Hey lads so still not much progress, once I start to get on it temps rise consistently and fairly fast, oil cooler moved and airfilter moved. Also fit a undertray and tbh I didn't notice much difference in low speed drifting and this is with the fan stuck on full belt. Is all the heat getting stuck under the bonnet? I don't know what to do at this stsge. {} {}
Whats the exhaust setup like, is it all lagged and stuff? I see a turbo blanket is there already. What are your intake temps like?
Downpipe is thermal wrapped to the start of the gearbox and have turbo blanket. I don't know my intake temps but my cold side pipes arent hot just a luke warm, I will do a log and see. There isnt much space for a bigger rad I have 55mm thick core. If I went thicker I would lose my fan. I could gain a small but of surface area at the bottom about a inch is all. Has anyone any experince with triple pass radiators? I've seen ppl like forsberg convert there single to triple. I can't find any definite results that it actually works. CSF and koyo have 3 pass versions {}
Your problem is airflow. Thicker rads are rarely a cure, as they are less efficient. Nor will a triple pass type affair. You need airflow.
Fans turning the correct way right? Wouldn't be the first person to accidentally get it spinning the wrong way. You could try an Rad/IC spray, get a kit off an old Impreza or DIY your own.