951 RS bits now being manufactured ;-)

[Peter Empson]

If I didn't leave it outside then I'd definately be adding ventilation now.

Just an idle thought, but what about opening up the bulkhead area so that the air escapes up over the bonnet, leaving the bonnet intact?
I suspect this wouldn't be very efficient as the area isn't that large (plus the fuse box is in the way on one side). Other downsides is I imagine you'd need to create a shield around the interior fan to stop fumes entering the cabin and I suppose you could argue that it acts as a firewall too. Ok, think I've talked myself out of that one already.. []

 

[Guest]

so are we saying the new lights will be illegal ?????????????????????////

 

[333pg333]

Peter, I was initially thinking of something along the lines in the pictures. Direct ducted flow that also would alleviate some of the 'open' nature of normal venting and not have issues, or as many with the weather. Ironically it's bucketing outside here as I write, but that is usually not of concern down here. As I am now not turning this car into a track beast, I may modify this approach somewhat. I have a guy that is going to put some vents into my c/f hood and they will have a raised front edge and also will protrude down below the line of the hood. If I put the GTS headlights into this car, that should open up some space with all the associated hardware of the stock headlights removed and that will afford us a lot more room to play with. So in answer to your question, I don't have it completed yet and therefore don't have any pictures. I will of course post once all this transpires. It just has to take it's place in the ever present queue.[]

 

[333pg333]

Personally I would think with your project that you should have some venting and even if you wind up having 2 separate bonnets. So long as you have 2 people, it shouldn't take very long to swap them over for trackdays. You won't need vents for the road, just track.

Next...

 

[944Turbo]

ORIGINAL: Peter Empson


If I didn't leave it outside then I'd definately be adding ventilation now.

Just an idle thought, but what about opening up the bulkhead area so that the air escapes up over the bonnet, leaving the bonnet intact?
I suspect this wouldn't be very efficient as the area isn't that large (plus the fuse box is in the way on one side). Other downsides is I imagine you'd need to create a shield around the interior fan to stop fumes entering the cabin and I suppose you could argue that it acts as a firewall too. Ok, think I've talked myself out of that one already.. []

There has been occasional talk on rennlist about raissing the back edge of the bonnet to allow hot air out and over the screen - apart from the alignment looking dodgy this should work but again you would probably get fumes in the fan. Not aware of any feedback from someone who has done it though.
Tony

 

[333pg333]

Lastly, just talking about tight fits...[]

 

[951rs]

Hi all

I don't see problems regarding the kit being street legal as the Hella headlights are EU approved (they feature an engraved E-Number) and the Makrolon covers don't require approval or a stamp for the UK IIRC. In Germany also the covers require TUV approval but in Finland, Sweden and France they don't.
But I guess reading the above using 100W bulbs then is not legal in the UK as it isn't also in Switzerland and Germany.

 

[333pg333]

[] Ouch!

 

[951rs]

Looks like we are very soon getting there:

The serial production units will feature housings that are manufactured in high-quality FRP including black matt gelcoat and the rear edge of the frame painted on the makrolon cover will be twice as thick as pictured here.

The next pics you will see will be fitted into the car. This is where you will be able to see the excellent fitment!

Cheers

Beni

 

[333pg333]

Looking great Beni!!! Excellent and constant updates too.

 

[Peter Empson]

Bass gt's car is fantastic (not actually seen it in the flesh yet sadly) and I do like that solution. I can't remember now where that routes from, is it just the badge panel area or does it route from the back of the radiator somehow? The badge panel on mine will only have one oil cooler in it, so it's possibly not that critical. If it is a problem it can be repositioned lower down by the main bumper opening if necessary (where I suspect I can get some of the hot air out underneath the car).

I suspect I'll regret not going for some kind of venting so will have another chat with Alan and see if we can come up with a solution, I'm not sure about the second bonnet idea, great theory, but I've already cracked one windscreen with my bonnet... Doh! []

I hadn't thought about angling the bonnet Tony. Shame no one seems to have tried it. I suspect if you put some aero fences (there must be a better name for them) running along between the wings and bonnet (as on some race 935's I think) it might look reasonable.

 

[Peter Empson]

They're looking superb Beni, nice work []

 

[edh]

The ducting on Steve's car is for the intercooler - using the low pressure on the bonnet section to suck air through the IC. IIRC from his posts on 924.org, he saw some big drops in ACT's with this mod.

 

[951rs]

and some more pictures with "less grey" housings []

Cheers

Beni

 

[sawood12]

ORIGINAL: edh

The ducting on Steve's car is for the intercooler - using the low pressure on the bonnet section to suck air through the IC. IIRC from his posts on 924.org, he saw some big drops in ACT's with this mod.

Yep, I can believe it. People often go for larger IC's as the first port of call instead of looking to improve the airflow through the stock IC (or a stock sized IC). Forced convection has a very powerful effect on cooling efficiency. Large IC's may well work but there are disadvantages to having large IC's - you get a larger pressure drop across them which means your turbo has to work harder. It's all about getting a good balance.