3.9 RSR project --- my Carrera reborn - Page 14

eimkeith · 07-01-2006, 03:44 AM

Concerning side impact bars without a full cage:

first off, I'd love to have the opportunity to build matteo a proper, full cage, tied well to the chassis with good impact and load distribution.

However, the requirement at this time, is to be able to remove the rollover protection for the safety of the rear seat passengers. This is the priority here in terms of safety. The addition of a diagonal side bar would prohibit removal of the rear section, thereby negating the primary requirement.

The diagonal member could be bolt-in you say? Well that further reduces the protection offered by an already largely inneffective single diagonal side impact bar (sort of like the bar found in the door of most cars, eh?). If the diagonal makes you drive faster, there's reason enough to put it in. In this instance, a full cage is the eventual logical solution, temporarily postponed until the little girls are too large to ride around in the back seat. At that point, I'll full cage this thing for their safety when matteo lets them drive on the track!

911teo · 07-01-2006, 03:18 PM

HA! this car is supposedly still my daily driver. It is not a race car nor I am going to race it yet.

So I realize there are advantages in going with a full cage in terms of stiffness but for the moment I think it is not the car limiting my lap times.

In terms of safety it is clear that a side impact bar would improve the situation but since the car at the moment will only be used for DEs and not door to door racing I assume an accident where I am going to get T-boned is somewhat less likely.

On the other hand I would not be entirely comfortable in driving on the street with a full cage.

Think of this like a GT3 RS... It comes from the factory with just a roll bar.

Another consideration is the fact that we are going to move to Europe sometimes in the next 24 months. I don't know how easy is to acheive street homologation of a car with a full welded cage.

In any event Keith and Aaron are the experts here. There are people that come from the West coast to have Zuffenhaus build their cage so I left them (with basically most of the build anyway) in charge with carte blanche.

Jack Olsen · 07-01-2006, 03:44 PM

Why is side impact an issue? Does it have fiberglass doors?

eimkeith · 07-01-2006, 05:39 PM

nope, stock, steel doors.
not an issue unless he gets parked sideways ot a DE in front of a first time-student who is covering his eyes in panic... or similar...
;^)

911teo · 07-05-2006, 09:18 AM

Keith and AAron just sent me some pics of the solution they came up with for the oil cooling ducts.

This is another example of how good these guys are. I have seen it in person and the picture just do not do it justice.

As you can see the ducts will easily clear the fuel cell and "should" provide a big enough route for the air to flow nicely

911teo · 07-05-2006, 09:22 AM

What is left to do before the car go to throught the poweder coating process is:

- Single wiper conversion
- Mounting arrangements for fire system
- Make clearance for oil line in rear fender (tires are so wide that there is no room in the wheel wells)

Some more pics of the oil ducts....

Joeaksa · 07-05-2006, 09:40 AM

Matteo,

"Daily driver"??? Yea, like a F-15 is a putt putt airplane just to get around with!

Cannot wait to see this one on the road or track! Beautiful work!

JoeA

randywebb · 07-05-2006, 10:18 AM

I'd be tempted to ditch the tubes and just fair in the entire area with sheet metal to form an enclosed non-round "tube" for flow...

911teo · 12:35 PM

Quote:

Originally posted by randywebb
I'd be tempted to ditch the tubes and just fair in the entire area with sheet metal to form an enclosed non-round "tube" for flow...

I will let Keith answer this one as he performed the surgery.

mjshira · 07-05-2006, 11:03 AM

this car is SICK! I love it.

eimkeith · 11:48 AM

Quote:

Originally posted by randywebb
I'd be tempted to ditch the tubes and just fair in the entire area with sheet metal to form an enclosed non-round "tube" for flow...

Randy - we considered that also... I just really liked the look of the gentle arcing hoses... I suppose it will easier to clean any stray debris out with removeable hoses, also...

That being said, I need to weld some screen over the wheel well end of the tubes...

I suppose if maximum flow/cooling was absolutely necessary, two seperate coolers mounted against the sides with air force fed into them from a collossal center duct would be the ticket. (like Porsche did)

J Smith · 07-05-2006, 12:24 PM

Damn! Damn! Damn! This is way beyond sick! Really nice work by everyone involved.
Good for you Matteo in building exactly what you want. It may not make sense to some people, but in the end, if it makes you happy, you've succeeded in building your dream car.

randywebb · 07-05-2006, 01:41 PM

"I just really liked the look of the gentle arcing hoses..."

- I agree -- it does look good!

911teo · 07-07-2006, 08:49 AM

I promise the next pics will be of the Blue car...

These are pics of the oil lines. The tires will be quite wide and Keith thought it was best to move the oil lines so that they wouldn't interfere...

Note as the oil tank has been moved forward to the rear axis... impoving the weight distribution...

And these are of the single wifer conversion....

CBRacerX · CBRacerX's Garage

Great Fab work - keep the oil tank detail coming!

911pcars · 07-07-2006, 10:05 AM

Any thought of splitting the oil cooler air duct to the brakes? You have created serious air flow with the nice sheet metal.

Sherwood

herman maire · 07-07-2006, 10:14 AM

Matteo, Whats involved in the single wiper mod (other than the metal work)? Do you still use the same motor and modify the stock linkage?
TIA

911teo · 07-07-2006, 10:16 AM

We'l' use the dedicated holes in the IROC bumper for the brakes, at least at the beginning.

The front disc have a 322mm diameter and the car should come in at around 2,300lbs.

If we need extra cooling I guess we could do that....

911teo · 07-07-2006, 10:22 AM

Quote:

Originally posted by herman maire
Matteo, Whats involved in the single wiper mod (other than the metal work)? Do you still use the same motor and modify the stock linkage?
TIA

I think you need to use a 944 wiper motor. I asked Keith at Zuffenhaus (the expert in these things) if it was difficult to do or labor intensive and he said it was a must for my car....

I will get you some more dets.

To be honest I am only doing it because the car is going to be repainted. I am not sure the benefits are worth the costs for a nice looking car.

mpeastend · 11:09 AM

Matteo, is it necessary to move oil lines for those tires? I'm putting the same size (315/35-17 Victoracers) in the rear on mine and P-Doc didn't mention that it would be a problem. The Lindsey's I will be using have a different offset than those that mount on a carrera trailing arm...that much I know. Don spoke to Mike Lindsey about it...they have their own specs for rims used on turbo trailing arms. I won't be using turbo spacers but will use a 1/4"spacer to move it out slightly. I plan on using the stock thermostat & Elephant Racing hard oil lines. Maybe it's just because of the relocation of your oil tank. I know I've read in the past that 315's should fit no problem...it's when you go larger that you may have issues.