Clarkey Posted June 27, 2005 Share Posted June 27, 2005 Will the filter get enough air if you block off the engine bay though - I know we need cold air but surely you can't get enough squeezed through the headlights to fill a single turbo or even the twins? but if you look at the pic from Dusty's site - you can see the air is supplied from the main fan which is fed along some piping to the airbox - just in the same way as the stock box. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted June 27, 2005 Share Posted June 27, 2005 guys there are various solutions to this, but before that I would like to know the temps during actual driving rather than at a stand still. I have data from the purple car, but want to see if John's results confirm this. Quote Link to comment Share on other sites More sharing options...
CJ Posted June 27, 2005 Share Posted June 27, 2005 What 5 mile drive? Look at John's first post Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted June 27, 2005 Share Posted June 27, 2005 If you look at pic 2 http://www.mkivsupra.net/vbb/attachment.php?attachmentid=15536, I am going to extend the pipework and cut a hole into the metal below the filter and drop it down there. It will allow me to get cold air in whilst blocking the hot air from the engine. Yeah the purple car was set up like this but purely for race/summer purposes. Edit :BTW CJ my emails to you keep bouncing, not sure if its you or me. Quote Link to comment Share on other sites More sharing options...
CJ Posted June 27, 2005 Share Posted June 27, 2005 Yeah the purple car was set up like this but purely for race/summer purposes. That was my one concern - that during the Winter there would be a problem with water. Quote Link to comment Share on other sites More sharing options...
Alex Posted June 27, 2005 Share Posted June 27, 2005 The advantages of the 'cone' filters are grossly overstated in general. As a result people find it preposterous to have a single and retain the stock airbox Please find the post where, on this BBS, anyone claims a cone filter is "better" than the stock air box. It's not always our first choice, but the turbo kits generally don't come with another option. Unless you can fab something up yourself you just have to go with what you are given and then make the best of that, via ducting and shielding. JohnK, I too would love to know what temps you are seeing when in motion, if you can do that and let us know it would be really appreciated. Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 27, 2005 Share Posted June 27, 2005 More than one John on here mate Too many johnnies lol... (all on a mission, mind you! ) Quote Link to comment Share on other sites More sharing options...
Wez Posted June 27, 2005 Share Posted June 27, 2005 Even the JGTC Supra has an airbox, now thats a setup I like. Quote Link to comment Share on other sites More sharing options...
JohnK Posted June 27, 2005 Author Share Posted June 27, 2005 I didnt log whilst driving, im on nights now so I wont get a chance for a while, but next time I get a chance I will do. The only reason I checked was that I noticed a hot area on the bonnet above the air filter area after a drive. Also worth noting is that im still using the stock SMIC so inlet temps are very important to me. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted June 27, 2005 Share Posted June 27, 2005 I didnt log whilst driving, im on nights now so I wont get a chance for a while, but next time I get a chance I will do. The only reason I checked was that I noticed a hot area on the bonnet above the air filter area after a drive. Also worth noting is that im still using the stock SMIC so inlet temps are very important to me. OK John, if you get a chance to try that would be great. I use a K probe thermometer and have some special wire sensors which slip inside the silicone, its the easiest way I have found so far, without installing a permanent sensor. Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 27, 2005 Share Posted June 27, 2005 If you guys do datalogging in the supra bay, maybe you could share the results here. I, for one, would be interested. Quote Link to comment Share on other sites More sharing options...
Guest chiefvinso Posted June 27, 2005 Share Posted June 27, 2005 Just out of curiosity, wouldnt it be necessary to know what the intake temp is towards the plenum chamber after its gone through an intercooler? It would surely be cooler then? I cant see why all aftermarket filters would be shit, in traffic yes but when you are driving the temp is bound to come down and more if you have a good intercooler? Quote Link to comment Share on other sites More sharing options...
Sharpie Posted June 27, 2005 Share Posted June 27, 2005 I am currently looking to box in / re-position my K&N filter too. Some pic's to help you ? Quote Link to comment Share on other sites More sharing options...
JohnA Posted June 28, 2005 Share Posted June 28, 2005 Nice one Peter. Does it have a front-facing intake a-la-stock, or does it face the SMIC space? Quote Link to comment Share on other sites More sharing options...
JohnK Posted July 10, 2005 Author Share Posted July 10, 2005 Ok I have some temps while car is in motion. All gained from a probe next to the filter, ambient 26c. While moving at 30+mph temps are in the region of 35 to 40c. As soon as you stop it rapidly increases to around 60c and then takes a fair while once moving to go back to 35 - 40. Town driving the temp rarely dips below 50c. Also heat is held for a long time under the bonnet while the engine is off (white car in the sun if that makes a difference). Parked the car with temp around 60, was still in the low 50's when I came back an hour later. Never did I stop for longer than a few mins, I would imaging things would get a lot hotter if I did. I am in the process of building an insulated airbox that uses the stock feeds, I will get more temps when it is done. Quote Link to comment Share on other sites More sharing options...
Alex Posted July 10, 2005 Share Posted July 10, 2005 Nice work John....hmmm think I'll go drill a big hole in the filler plate Quote Link to comment Share on other sites More sharing options...
JohnA Posted July 10, 2005 Share Posted July 10, 2005 ...While moving at 30+mph temps are in the region of 35 to 40c. As soon as you stop it rapidly increases to around 60c and then takes a fair while once moving to go back to 35 - 40. Town driving the temp rarely dips below 50c. This is typical, when I datalogged under the Calibra's bonnet it was a similar story. 16C higher inlet temps on average are bad news for performance and reliability, especially since some of that will go through the i/c and heatsoak it even more. For those with FMICs this extra heat will be dumped on the fins of the aircon condenser and the coolant rad. The worst is that the turbo compressor will start cavitating earlier. (the pressure graphs only account for a low ambient intake temp) In the winter it's nowhere near as bad though. Quote Link to comment Share on other sites More sharing options...
garethr Posted July 10, 2005 Share Posted July 10, 2005 You may find some of this interesting http://planetsoarer.com/#Intakes: Quote Link to comment Share on other sites More sharing options...
AndrewIV Posted July 13, 2005 Share Posted July 13, 2005 Alright, I have a NA with a K&N conical filter. The piping did get pretty hot after a long trip. I did two things to cool my intake. First I changed to a TRD style hood which I must say lowered underhood temperatures dramatically. The second thing I did which is helping was I insulated the aluminum tubing with silicone electric tape. It may lookn like crap but it does lower your intake temperatures. I plan on doing a header wrap in the near future to further lower temperatures. I live in Mississippi and in the summer the temperatures can really shoot up there so if it works for me I could work for anyone else with the same problem. Quote Link to comment Share on other sites More sharing options...
JohnK Posted July 14, 2005 Author Share Posted July 14, 2005 I have almost completed my cold air box, I will log some temnps when I can. It would be interesting to know the temps inside a stock airbox if anyone has the inclination. Quote Link to comment Share on other sites More sharing options...
Sharpie Posted July 14, 2005 Share Posted July 14, 2005 But Why ? The direct cold feed supply is below - is this not just going to suck hot air in ? Quote Link to comment Share on other sites More sharing options...
JohnA Posted July 14, 2005 Share Posted July 14, 2005 The cold air feed is only effective when the engine has no choice but to suck air through it. Drilling holes on the airbox makes it much easier to draw air from there, rather than use the stock feeds. Still, this is nowhere near as bad as an exposed cone filter situation... Quote Link to comment Share on other sites More sharing options...
JohnK Posted July 14, 2005 Author Share Posted July 14, 2005 Peter - I'm unsure what you mean? The box I have built seals off the filter from the engine bay and should only get the cold air from the feed under the headlight and the one over the fan. Im only doing this as the stock box will not fit any more. Quote Link to comment Share on other sites More sharing options...
JohnK Posted July 15, 2005 Author Share Posted July 15, 2005 I have fitted the airbox tonight. It is very crude and very much function over form but it should serve its purpose, I have also wrapped my downpipe. Its far from perfect and there are still some gaps to fill up but hopefully tomorrow I will have a chance to measure some temps. http://www.efter-stormen.net/airbox1.jpg http://www.efter-stormen.net/airbox2.jpg http://www.efter-stormen.net/wrap.jpg Quote Link to comment Share on other sites More sharing options...
JohnA Posted July 15, 2005 Share Posted July 15, 2005 Looks nice John, certainly better than being fully exposed. The thermal wrapping should keep underbonnet temps down too. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.