Timbo Slice Posted August 23, 2013 Report Share Posted August 23, 2013 That is actually a forced airflow on top of the turbo. there is no intercooler there. that vent opening actually forces air straight down on top of the turbo to cool it down. its designed and oriented to point right at the turbo. those engines are mounted exactly the same as ours and turbo is in the same location So it's better for our cars to get as hot as possible at the turbo, but for the Evo X the turbo needs to be cooled? Something is mixed up here. Link to comment Share on other sites More sharing options...
Q-Ship Posted August 23, 2013 Report Share Posted August 23, 2013 well you want it as hot as possible for exhaust velocity, but you also don't want your car to melt, so somewhere you have to decide which is a more pressing need; turbo heat retention or some other factor like reducing underhood temperatures. Link to comment Share on other sites More sharing options...
lookforjoe Posted August 23, 2013 Author Report Share Posted August 23, 2013 Seriously? Why do you think there are turbo heat shields or why do people wrap their manifolds? Its to keep as much heat in as possible. The hotter the gas the more energy imparted to the turbine - hotter gas is less dense, therefore more efficient at spooling the turbo. If you do remove heat from that area, what benefits are there? My point is that there is sufficient heat as it is - I have heat wrapped headers, heat shield & blanket on the hot side. The heat shield is as much if not more to minimize heat soak as to keep heat in. I sincerely doubt there is any issue with there being a lack of internal heat. Removing heat from the engine bay through the vent is not going to have a negative effect on the functionality of the heat transfer through the exhaust. Maybe your theory would be relevant on a stock setup, but I think the TD04HL series is so restrictive, it will have no problems generating high enough temps to maintain thermal efficiency. The bottom line is, there is so much you can rely on general theory, and then there is the practical application & results on any specific setup. Unless you experiment and evaluate, you will never know. Based on the data logging I do, I don't see any negatives with the setup as it is. Link to comment Share on other sites More sharing options...
rcstdad Posted August 23, 2013 Report Share Posted August 23, 2013 Well, for what's it's worth, I did it more for the fact that I just simply liked how it looked. I have rec'd all kinds of compliments on it so far. I still have a cowl seal in mine, so no issue with the inside vents. While I'm sitting in traffic in the hot florida sun, heat is escaping, and in the long run, I'm sure that's good for all the plastic and rubber under the hood. Link to comment Share on other sites More sharing options...
andyb5 Posted August 23, 2013 Report Share Posted August 23, 2013 You guys are kind of arguing two sides of the same coin. You want high exhaust gas temps to maximize spool and reduce lag, so that is where a turbo blanket and heat wrap come into play. But it is important to keep engine bay temps down to reduce IATs and heat soak as much as possible. Link to comment Share on other sites More sharing options...
Yellow95 Posted August 24, 2013 Report Share Posted August 24, 2013 Well, for what's it's worth, I did it more for the fact that I just simply liked how it looked. I have rec'd all kinds of compliments on it so far. I still have a cowl seal in mine, so no issue with the inside vents. While I'm sitting in traffic in the hot florida sun, heat is escaping, and in the long run, I'm sure that's good for all the plastic and rubber under the hood. Pics? Link to comment Share on other sites More sharing options...
lookforjoe Posted August 25, 2013 Author Report Share Posted August 25, 2013 Pics? Pic he sent me (he also got the template from me) He said it's posted in 'what I did to my car today' thread from the beginning of Aug - I've no idea where that thread is kept... Link to comment Share on other sites More sharing options...
gmsgltr Posted August 25, 2013 Report Share Posted August 25, 2013 Wait till the cfd comes back before anything is actually concluded... Let the actual calculations/math do the talking. It's even harder making assumptions on a square car lol (remember too in Hussein's case he has the intake vents as well pulling air and some now escaping out the vent) As for the physical vent itself... I'm still looking for close up pics... How flush the vent is to the hood, and some far away shots for a better perspective. I love the idea and truly think it will help our cars. Link to comment Share on other sites More sharing options...
rcstdad Posted August 25, 2013 Report Share Posted August 25, 2013 Off the hood the thickness of double sided trim tape. Link to comment Share on other sites More sharing options...
Piston Slapper Posted August 26, 2013 Report Share Posted August 26, 2013 Pic he sent me (he also got the template from me) *snip* He said it's posted in 'what I did to my car today' thread from the beginning of Aug - I've no idea where that thread is kept... It's kept on swedespeed lol. Link to comment Share on other sites More sharing options...
andyb5 Posted August 26, 2013 Report Share Posted August 26, 2013 Or try the off-topic forum here ;) Link to comment Share on other sites More sharing options...
Piston Slapper Posted August 26, 2013 Report Share Posted August 26, 2013 Actually, S_Moneh is right. The highest pressure is just below the windshield, also the same place as the lowest velocity of air flow. Actually the highest pressure is on the front grille, bumper, headlights, etc area... Link to comment Share on other sites More sharing options...
Timbo Slice Posted August 26, 2013 Report Share Posted August 26, 2013 Actually, my CFD is almost done and it looks like you're wrong there buddy ;) Link to comment Share on other sites More sharing options...
Piston Slapper Posted August 26, 2013 Report Share Posted August 26, 2013 Actually, my CFD is almost done and it looks like you're wrong there buddy I'd guess you messed something up then, because all the ones I've ever seen, including the ones posted in this thread by crispinds show a giant high pressure zone right in front of the car's nose. Link to comment Share on other sites More sharing options...
Timbo Slice Posted August 26, 2013 Report Share Posted August 26, 2013 I guess I should throw away my engineering degree then and relearn how to run CFD on SolidWorks I'm not here to argue man, just simply correcting you because I want the right information to be displayed. The picture Josh posted is actually spot on to what I found. Edit: And oh by the way, what Crispinds posted is a VW GTI and a Corvette. You can't honestly expect it to be exactly the same for our bricks.. Link to comment Share on other sites More sharing options...
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