My 944 1uz-fe V8 swap
- Thread starter Eldavo
- Start date
edh
New member
Best place to vent would be a duct behind the rad, into the low pressure area at front of bonnet (base of screen is a high pressure area) - Have seen this on some cars including Steve B's 924 turbo.ORIGINAL: JagdHamster Looking at this pressure diagram closely and with a knowledge of bernoulli's laws by profession, I note that point 1 is under the car, just in front of the front tyre. It then graphs forwards to the bumper and only when it reaches point 10 does it move left to right over the car as expected.So the low-pressure is actually above, in front of and on top of the front bumper (the airflow speeds up here the most, clearly, to travel over the car) However, if the air was able to flow through the car then this pressure drop would be much reduced. So the guys ares right; at the moment, the low pressure will drastically reduce cooling. However, if you make a pathway through the radiator and back out into the airflow (say at the windscreen, or even under the car like SMICs do), I think the pressure drop through the vents will be a lot less (maybe even a little positive pressure). That's the vital bit; making an exit for the airflow to rejoin.
JagdHamster
New member
Hi Edh, Look at the graph again; the back of the bonnet is point 20 and is a negative-pressure area. Venting forward would be tricky and build up pressure against the flow. I'd go for under the car or out the back of the bonnet, myself. Russ
]
you have to use the direct link betweenORIGINAL: xschop That's correct, I just remembered on the NA nose, I removed that plastic horizontal flat piece as well as removing the hood cushion on the firewal lip. Huge cooling increase....
Not yet Bob, i will do that last, and i want that to look like something Porsche would have done, the exterior styling is very important to me. The basic idea i have had is to cut along the current bonnet swage lines and raise the centre slightly, then do a gradual blend in.... sort of copying the shape of the wing lines. Bodywork is a specialty of mine, so it will look good.
JagdHamster
New member
Might be worth a look at some of the vents used by the 948 guys in the US on Rennlist? Russ
Paul - I've got a fibreglass vented turbo badge panel sat in my garage here - NE3 postcode if you want to try it. The reasons I haven't fitted it were as described above, the air has nowhere to go and stalls. I had looked at the DeutschNine bonnet vents as a possible solution to use with the vented panel.
That's great thanks, i'll let you know, might just chop my NA one up and see how it goes. I've started mocking up the intake on this, very difficult to find space to route a 3" pipe from the throttle body to a suitable cold air location. One thing that has to go is the factory washer bottle, it just takes up too much vital space for this conversion, so i will fit a much smaller bottle somewhere else. For now the intake navigates the strut tower, between the inner wing and headlight motor, and it will end up with the filter low down at the front where the washer bottle base used to be, it will need shielding from road crap down there but it's the best place for it.
Posts made and opinions expressed are those of the individual forum members
Use of the Forum is subject to the Terms and Conditions
