turbobrick Posted August 12, 2005 Report Share Posted August 12, 2005 i think ventilation is ventilation regardless... breathing room so to speak. Link to comment Share on other sites More sharing options...
GShyneDM Posted August 12, 2005 Report Share Posted August 12, 2005 Free Modification... Done Although this does change how I blow dry my car in that area... knowing that I may be blowing water into my engine bay...And yes.. I have noticed LOTS of heat coming out after a drive.I learned from my dad to open the hood after a long drive to let the heat out of the engine and allow it to cool off better... but that wasnt feasable during driving... this is a GREAT idea... Cheers to Florian and Slater for coming together for this... Link to comment Share on other sites More sharing options...
steve s Posted August 12, 2005 Report Share Posted August 12, 2005 regardless of the flow under the engine bay, theoretically, removing the seal should "pull out" some heat, with the faster the airflow the faster air is pulled out, which slater's #s seem to indicate..sorry, ot, but is florian still in ohio? only in ohio on this trip? Link to comment Share on other sites More sharing options...
volflo Posted August 12, 2005 Report Share Posted August 12, 2005 the pressure above the car is on the whole smaller than underneath. the air molecules diverted at the front meet at the back of car again, easily spoken.Since the way over the car is longer than underneath, the molecules travelling over the car have to be pulled apart --> less vol for the same amount of molecules ---> less pressure. (remember pV=nRT?)so if p above is smaller than p under the car what happens? yes, upforce.Sport Auto measures these upforces at 200k for each of the cars they have in their monthly supertest. Acc from what i have seen for other cars, id assume that upforce is anywhere from 50 to 150lbs for each axle at that speed.As for removing the seal it s quite simple:imagine you move something like this to the left through water (or air):a. ___________________________orb. _____________________________.....................................................|.....................................................|.....................................................|.....................................................| With a the air above under the sheet/ panel has the same speed.With b the thing gets filled up, and when the buckets full all the air doesnt go into the bay but up at the air dam and over the the hood, since the engine bay has already such a high pressure (read: is full) that no more gets into it....its like trying to pour cold water in a bucket full of hot water. What happened if it had plug at the bottom? Would the bucket cool down more quickly?Plus: and what sits at the front of the hood? right underneath the letter b? ;) Link to comment Share on other sites More sharing options...
Guest Guest Posted August 12, 2005 Report Share Posted August 12, 2005 Le Grille does... or you can say a Hot Radiator/intercoolerYour water in a bucket theory is right... all that cooler air trying to enter the hot engine bay, with the only outage on the bottom. (or well mainly through that, it does heat up the hood and that in turn gets a tad cooled by the air, but still)hot air moves up, and with this venting, it allows it to be realeased upward. Would this also contribute to some areo-dynamics during high speed driving... just a tad... Link to comment Share on other sites More sharing options...
GShyneDM Posted August 12, 2005 Report Share Posted August 12, 2005 Le Grille does... or you can say a Hot Radiator/ICYour water in a bucket theory is right... all that cooler air trying to enter the hot engine bay, with the only outage on the bottom. (or well mainly through that, it does heat up the hood and that in turn gets a tad cooled by the air, but still)hot air moves up, and with this venting, it allows it to be realeased upward. Would this also contribute to some areo-dynamics during high speed driving... just a tad...←<--- me Link to comment Share on other sites More sharing options...
PullMyFinger Posted August 12, 2005 Report Share Posted August 12, 2005 Why did I see an intake temperature DROP when the car was moving with no seal vs the seal?←I was just trying to figure out what was happening with the seal removed. Which direction is the air flowing and what else is happening like increased uplift or increased downforce. I was mostly just wondering out loud about it after talking with some friends about this the other night. Just after I cut my seal out, 18 inches from the driver side The point is: there *IS* a IAT drop and its significant, so this mod is working and thats all that really matters. I was just more curious as to how and why and all that.The fact that you were able to measure before and after IAT temps is just awesome and helps to really prove that something is working instead of just theorizing and seat-of-the-pants mods.So all is good, really good! :thumbsupemoticon: whereever that thing lives Link to comment Share on other sites More sharing options...
mrmandmman Posted August 12, 2005 Report Share Posted August 12, 2005 now go put some washers on that hood and measure again! Link to comment Share on other sites More sharing options...
steve s Posted August 12, 2005 Report Share Posted August 12, 2005 flow gives me nightmares, i dropped out of chem-e 150 for fluid mechanics :P Link to comment Share on other sites More sharing options...
PorBleemo Posted August 12, 2005 Report Share Posted August 12, 2005 I am a bit confused when you say "CEL-free ways to disable the sensor without upgrading the ECUs..."Does this mean that because the '96+ ECU doesn't recognize the EGR it will trigger a CEL for it? I am all for prolonging the life of my 850 and this looks like it has great potential. Link to comment Share on other sites More sharing options...
Slater Posted August 12, 2005 Author Report Share Posted August 12, 2005 I am a bit confused when you say "CEL-free ways to disable the sensor without upgrading the ECUs..."Does this mean that because the '96+ ECU doesn't recognize the EGR it will trigger a CEL for it? I am all for prolonging the life of my 850 and this looks like it has great potential.←On a 93-95 car with EGR, there are a few ways to "disable" the EGR without throwing an EGR code.The first is to stick in a 96-98 ECU. Since the 96-98 ECU doesn't even KNOW what EGR is (because 96-98 cars do not have it), then you will NOT get any codes because there is no EGR code to throw (because the 96-98 ECU doesn't even KNOW what EGR is). Sure, your 93-95 ENGINE has the EGR crap installed, but because the 96-98 ECU doesn't know what to do with the sensors because according to the 96-98 ECU it doesn't exist, it never opens the EGR valve but at the same time never throws a code because it doesn't even know to look for EGR. Understand?The other ways involve tricking the EGR system itself - possibly blockoff plates, or resistors on the EGR temp sensor, etc. This would be an ALTERNATIVE to upgrading to a 96-98 ECU.I already KNOW that upgrading to a 96-98 ECU on an earlier factory-equipped EGR car will disable the EGR system and thus not throw a code. What I do NOT know and am trying to find out is what the OTHER effective method(s) is for disabling the EGR WITHOUT upgrading a 96-98 ECU.Did I explain it more clearly, or are you still confused?- Slater Link to comment Share on other sites More sharing options...
GShyneDM Posted August 12, 2005 Report Share Posted August 12, 2005 Sure, your ENGINE has the EGR crap installed, but because the ECU doesn't know what to do with the sensors because according to the ECU it doesn't exist, it never opens the EGR valve but at the same time never throws a code because it doesn't even know to look for EGR. Understand?Did I explain it more clearly, or are you still confused?- Slater←so wait, i have parts/senors that arent even being used in anyway?!?!hrmm... they must be eliminated!!! Link to comment Share on other sites More sharing options...
Slater Posted August 12, 2005 Author Report Share Posted August 12, 2005 so wait, i have parts/senors that arent even being used in anyway?!?!hrmm... they must be eliminated!!!←You have a 98. You don't have an EGR system. Link to comment Share on other sites More sharing options...
GShyneDM Posted August 12, 2005 Report Share Posted August 12, 2005 You have a 98. You don't have an EGR system.← stupid me... i read your post completely wrong... :P Link to comment Share on other sites More sharing options...
ziddey Posted August 13, 2005 Report Share Posted August 13, 2005 i'm very very interested in exploring thisalso, the airmod, i have the fuse box o nthe driver's side. There's two seals around it. The long one that stretches across the entire top, and another one that surrounds the top. What am I supposed to do to create this flow? Cut the seal after the fuse box and remove the piece stretching across the engine? Link to comment Share on other sites More sharing options...
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