I am installing a new front bumper, the ducts provided cut off a nice piece of the radiator, doesn't seem smart to loose that much radiator to sacrifice cooling the motor. Some custom work will be done to use the stock ducts while mending them into the new ductwork.... Any opinions on loosing that much radiator in respect to cooling the motor?

 

is this gt2 bumper? dont they use different ducts?

 

Not GT2 bumper, this is a original RUF bumper. The stock ducts go all the way to the end covering all of the radiator, you can see where they clip in.

 

Looks like the junk in there already cut the flow :-)

I doubt it would hurt it unless you were in a very hot region and tracking the car.

 

i seem to remember the ruf bumper had its own ductwork when purchased. theres a blue ruf car on here and he can most likely provide you with the needed info.

911-al i think
is this the bumper you bought? this was for sale in the forum and had new ductwork
https://www.6speedonline.com/forums/...p;d=1361478076

 

My Rturbo has the RUF front bumper which includes all factory RUF ductwork and radiator brackets to route the airflow properly over the radiators and up over the hood. Fit and finish is factory perfect. I run the car hard at our local 5200' elevation track with summer track temps at +130F and cooling is absolutely not an issue. My coolant temps do not run any higher at the end of a 30min session than they do sitting in traffic.

Did your bumper not come with the correct RUF ducting, brackets, and radiator screens? If not than Mike Melville at RUF USA can order those for you. I am assuming the bumper below is what you have?

 

i dont have a ruf bumper but i did think they came with all their own ductwork. is the op using the 996 turbo ductwork with the ruf bumper?

 

Not sure what he is using. The ducting that comes with the RUF bumper are RUF parts with RUF specific part numbers clearly stamped into them. If he doesn't have the proper ducting then he can just order it from RUF. Simple....

 

This is the Original RUF ductwork that comes with the bumper and following the RUF manual that duct is held on by the 2 screws right under the holes provided in the duct. They line up perfect, fit and finish is dead on, everything fits like a glove, however; you loose that 1/4 of your radiator.

Did you see your bumper go on? ......If this is how it's ran then I guess it works I am just not sure about loosing that chunk of the radiator.

 

I think I am going to mend together the OEM piece of the duct work that clamps to the radiator, to the front half of the RUF duct that fills the air ducts in the bumper so I don't loose that much radiator on each side. Unless this is how people run the bumper and there are no issues

 

No, I did not see my bumper being put on. It was done at RUF. Looking at the picture in your original post, the duct you show curves in at the end of the secondary radiator (the one in front of the primary) but cuts off a portion of the primary radiator. Looking into the front of my drivers side duct, my duct does not curve in to the primary radiator until about an inch after the silver metal coolant pipe flange (show in your picture) and does not seem to cut off any portion of the airflow to the radiator. In other words, when I'm looking into the front of the duct I can see the silver metal coolant pipe flange. The part number of the drivers side duct I on my car is R96.575.141.50

I'll try to snap a picture looking into the drivers side duct to give you an idea of what I'm talking about but I doubt the picture will show anything due to the mesh screens.

 

Yes that duct curves at the end to match up with those 2 screw holes... In the instruction manual it reads "only 2 screws needed!" and to be honest like you said the fitment is spot on. To loose that much radiator doesn't seem to spot on though.

There are GT2 water pipes that are in the kit as well along with the center duct, horn support, center duct, bushings, and some other odds and ends. Nothing moves that primary radiator to match the duct work.

It has to be so hard to see what was done on the front of your car with everything going on but if you can see that water line then its different ductwork then I have and different then the instructions because that duct slides in with tabs that click into that radiator, no screws. I would love to try and see a photo if you could.

The part # you gave is for the center air duct. The left and right air ducts are R96 575 321(2) 50.

I plan on doing this front end conversion as best as possible because when it is done I have a feeling it will be completely functional and help the car perform.

Thanks for your help.

 

Glad to try to help. I tried to take a picture of the inside of the duct but the screens prevent you from seeing any detail. Also, I can't see the part numbers on the side ducting since it is probably hidden by the bumper. The only thing I can tell you for sure is that looking into the duct from the front of the car, my duct does not curve in to the radiator until past the silver flange (the one with the bolt on top and the silver pipe on the bottom) that attaches to the small secondary radiator (which I think is the A/C radiator). The silver pipe carries freon for the A/C. If you can take a picture of the installation instructions feel free to post them but there really is only one way to mount this. I can't imagine RUF would change the design of the ducts for some reason. I probably wouldn't go changing anything on the design. RUF used a wind in the design of this bumper and it has been run up to 218mph in the testing stages. Like I said I have never had any cooling issues whatsoever at my hot and high altitude track. My car does use the GT2 fender liners but that should not make any difference. The only change is that instead of dumping the radiator air out ahead of the front tire as in the TT liners, the GT2 liners direct this air behind the front wheel and to the front brakes.

Additionally, I would not be too concerned about loosing the last 2" of airflow over the radiator that is about 14" long. That is only about 15% of the total air flow over it. There is a fan behind the primary radiator that pulls air through the radiator and that fan only covers the central portion of the radiator so I don't think it's a big deal at all. If everything fits perfectly, I'd install it according to the instructions and see how it performs. My bet is that you will be fine.

 

I will keep you posted on what I decide.... PM your email I will send you some stuff.

 

Is there a guide that shows how the duct work is installed? just want to see what is entailed in the installation before making a purchase