carrera style badge panel
- Thread starter j4mou
- Start date
944 man
Active member
Id thought the same, but creating a clear air path is virtually impossibe - I was thinking about something similar to a 968RS vent which meets the IC rear and channels air up and out. Easier on a 968, of course.
I suppose that a vent similar to that of an RS200, or a WRC lancer might work; located in the optimum position, which would be a task in itself.
Simon.
I suppose that a vent similar to that of an RS200, or a WRC lancer might work; located in the optimum position, which would be a task in itself.
Simon.
Indi9xx
New member
An old post, so sorry to drag it kicking and screaming into the present, but I thought it needed clarifying why I might say something like putting a 924 turbo or other modified badge panel onto the front of turbo is not a great idea... I have told customers before, but some tend to listen to their esthetics rather than science. 
The 944 intercooler is fed from a narrow slit in the front PU, the air is then fed through a cowling to the intercooler.. you probably know this.
The air entering this slit in the front PU is traveling at anywhere between 0 and 170 mph.
If you present a 944 turbo intercooler with the direct airspeed of the car, even a modified intercooler like our ones, above a set speed, the air will not progress through the intercooler smoothly, creating multiple vortexes of the air, which will eventually create a barrier in front of the intercooler with very little air managing to progress through its fins, so reducing the amount of heat that can be convected from the intercooler.
The Porsche solution was the front PU slit, with a cowling which expands from the slit size to the intercooler face size, so the air at any airspeed will slow down, causing the air presented to the intercooler to be a fraction of the car's roadspeed.
We did a lot of testing when we made our uprated intercoolers, datalogging air pressure before the intercooler in the airstream, after the intercooler in the airstream, air pressure in each end tank, air temperature in each end tank and the speed of the car, both with and without the cowling, along with using a new 924 turbo badge pannel I have, and found the efficiency even with a heavily tuned 944 turbo (417BHP and 398lb-ft) was higher when using the slit and cowling and all the data proved that airflow through the intercooler ground to a halt above 120 mph (causing intake temperatures to soar) and this problem began as low as 40mph.
Some people with 944 turbo's might not be aware of this, and the very mod which they hope is benefiting their engine or power, could ultimately be the thing that causes the engine to detonate in a big way.
We did similar experiments over the last year to find the best bonnet vents and the optimum position for them to improve airflow around the 944 turbo engine bay, improve evacuation of the hot air which can build there both on the move, and when sat in traffic, which was prompted by a customer who's seriously tuned 944 turbo engine reached the point where the engine bay temperatures were high enough to melt plastic items!!
The good news from our testing with bonnet vents (in the right place, size and design) believe it or not, you can actually tell the difference to the stability of the front end at very illeagle road (I mean track) speeds... Anyone who has gone above 125 mph without an undertray may have noticed more lift on the front end, or even noticed their bonnet flexing at speed as the air tries to rush out of the bonnet... well you get another improvement with a vented bonnet... Not to mention the main aim of encouraging more airflow through the radiator and intercooler, promoted by lower air pressure on the other side of them.
The appliance of science
The 944 intercooler is fed from a narrow slit in the front PU, the air is then fed through a cowling to the intercooler.. you probably know this.
The air entering this slit in the front PU is traveling at anywhere between 0 and 170 mph.
If you present a 944 turbo intercooler with the direct airspeed of the car, even a modified intercooler like our ones, above a set speed, the air will not progress through the intercooler smoothly, creating multiple vortexes of the air, which will eventually create a barrier in front of the intercooler with very little air managing to progress through its fins, so reducing the amount of heat that can be convected from the intercooler.
The Porsche solution was the front PU slit, with a cowling which expands from the slit size to the intercooler face size, so the air at any airspeed will slow down, causing the air presented to the intercooler to be a fraction of the car's roadspeed.
We did a lot of testing when we made our uprated intercoolers, datalogging air pressure before the intercooler in the airstream, after the intercooler in the airstream, air pressure in each end tank, air temperature in each end tank and the speed of the car, both with and without the cowling, along with using a new 924 turbo badge pannel I have, and found the efficiency even with a heavily tuned 944 turbo (417BHP and 398lb-ft) was higher when using the slit and cowling and all the data proved that airflow through the intercooler ground to a halt above 120 mph (causing intake temperatures to soar) and this problem began as low as 40mph.
Some people with 944 turbo's might not be aware of this, and the very mod which they hope is benefiting their engine or power, could ultimately be the thing that causes the engine to detonate in a big way.
We did similar experiments over the last year to find the best bonnet vents and the optimum position for them to improve airflow around the 944 turbo engine bay, improve evacuation of the hot air which can build there both on the move, and when sat in traffic, which was prompted by a customer who's seriously tuned 944 turbo engine reached the point where the engine bay temperatures were high enough to melt plastic items!!
The good news from our testing with bonnet vents (in the right place, size and design) believe it or not, you can actually tell the difference to the stability of the front end at very illeagle road (I mean track) speeds... Anyone who has gone above 125 mph without an undertray may have noticed more lift on the front end, or even noticed their bonnet flexing at speed as the air tries to rush out of the bonnet... well you get another improvement with a vented bonnet... Not to mention the main aim of encouraging more airflow through the radiator and intercooler, promoted by lower air pressure on the other side of them.
The appliance of science
Indi9xx
New member
lol..
Luckily, (or not) the owner of the car bought it to us about a year ago to do some more mods to her... then went off the radar until a few weeks ago when his 911 broke down and was deposited at work as well, (while I was not there, so could not get him to take his 944 turbo away).. So we still this particular 3.2 944 Turbo beast at work right now... although probably a little bit dusty.
I need to find a better rubber seal for around the vents, at the moment they are sealed for practicalities rather than for cosmetics, but we need to get the owners input on this and he has gone awol again..
I am at home packing for holiday at the moment, but will be at the workshop this afternoon and will take some photos for you chaps.
When you see the car, you might recognize it.
Luckily, (or not) the owner of the car bought it to us about a year ago to do some more mods to her... then went off the radar until a few weeks ago when his 911 broke down and was deposited at work as well, (while I was not there, so could not get him to take his 944 turbo away).. So we still this particular 3.2 944 Turbo beast at work right now... although probably a little bit dusty.
I need to find a better rubber seal for around the vents, at the moment they are sealed for practicalities rather than for cosmetics, but we need to get the owners input on this and he has gone awol again..
I am at home packing for holiday at the moment, but will be at the workshop this afternoon and will take some photos for you chaps.
When you see the car, you might recognize it.
scam75
Well-known member
Hi Jon
When you say undertray do you mean the batwing and plastic secondary undertray or do you need the mostly always missing aluminium undertray for it to work properly?
I speak as one of many turbo owners who's alu tray has gone walk about before my ownership!
Thanks
Stuart
When you say undertray do you mean the batwing and plastic secondary undertray or do you need the mostly always missing aluminium undertray for it to work properly?
I speak as one of many turbo owners who's alu tray has gone walk about before my ownership!
Thanks
Stuart
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