Catorce

Jim,

Wow - that was like the missing piece to a puzzle. It all kind of makes sense now. Yep 27 gallon tank, increased ride height for street driving sure does point to road racing events like the Silver State.

Also, the tires selected are pretty high profile tires for a race tire. Goodyear makes lower aspect ratio tires, but for whatever reason he picked these - they have huge sidewalls perhaps implying like you said that cornering was not the highest priority....

As for the massive splitter that would be anyone's guess - I just have faith that Bob, being an engineer (albeit not a mechanical one) had an idea of what he was doing. I'll keep it for now, except I will render it in carbon fiber.

James Bailey

Perhaps to understand the mind set read about Big Red the 1969 Camero that Gotliebi set records with at Silver State....he is the king of the highway !!!! he was getting 2 1/2- 3 mpg at speed I The rather tall tires has more to do with limited rear end ratios for the 928 than anything else.

Catorce

Yep I know that car frigging amazing ride!

James Bailey

The RUF CTR. YELLOW BIRD made it clear that narrow bodies can be faster helps to shave the rain gutters and use small aero mirrors too...now back to the regular programming

Catorce

Yeah but the top speed thing is a strange game with its own set of rules. As a counterpoint to the CTR, you have the almost Escalade sized Bugatti Veyron which weighs as much as two CTRs practically but blows it away by 50 miles an hour. Top speed is something I am definitely NOT interested in!

Catorce

While I wait for parts (story of my life) I decided to mock up the fuel system.

Carl had already mentioned that he wanted an Aeromotive A750 fuel pump to fuel the motor, and that part came with the package I bought. Looking at Joseph Fan's car, I noticed he had a surge tank because he was experiencing fuel starvation in high G turns, even with multiple pickups, so I decided to incorporate that feature in my build.

As Jim Bailey pointed out in another thread, fuel system legality is an issue. Before I even had the car in my hands, I had already been poring over the POC regs on the car. There are only three major ones when it comes to cells:

1. Fuel cell has to be behind a metal firewall from the driver. Check - car already has such a thing, currently unbolted for ease of access.

2. Fuel cell must have crash protection in place. Check - original bumper is still in place, protecting the tank.

3. Fuel fill cannot touch body of car - Not applicable - don't have a fuel nozzle.

With that in mind I mocked up the components. One pic shows the components as they are now, the second one has photoshop lines so you can see where they connect.

Pretty simple setup - meets my goals for easy access without taking the car apart. An AEM Bosch 044 clone pump pulls fuel out of the main cell through an Aeromotive 100 micron filter, and brings it into a 1 gallon surge tank. From there, the Aeromotive A750 main pump pulls from the very bottom of the surge tank to feed the motor.

I routed the fuel return to the top of the surge tank to make sure it always stays full, and the vent line is self explanatory. Up front, the main line goes to an FPR to meter the pressure.

Nothing is bolted down yet. I usually make the hoses first, then bolt everything down so as not to kink the hoses.

Should be a pretty strong and simple system .

hacker-pschorr

Actually the size of the Veyron is misleading. They are not any longer than a 928, about 6" wider and not as tall. First time I saw one in person (Peterson Museum) I was shocked how tiny it was.

Weight is a good thing for all out top speed, which is where the Veyron weight comes in. I'm sure at 200mph the Veyron is significantly more stable than the CTR.

I remember the R&T Top Speed Shootout back in 1989 with the CTR in attendance with Paul Frère & Phil Hill driving. The journalist on board talked about riding along for the top speed runs since weight was irrelevant to the final number. It will just take a tad longer to get there.

Catorce

Wow, cool, did not know that! It looks HUGE in pics, LOL.

IIRC the CTR did 211mph....

jorj7

There's a guy that ran a CTR in Open Road Racing. He hit 208 MPH at the Pony Express in 2001. Of course the technology was a lot different in those cars then the Veyron. I think he was trying to beat Marc's run in 2000 in the "DEVEK White Car", when he did 210 MPH, which seems to be the fastest Official Speed for a 928 (or a Porsche) at any ORR event. My 90 S4 tied it in 2013, and Tim & Cheryl got up to 205 MPH in the "Beast", their 88 S4. So the 928 has a long history competing in ORR and Devore was involved at the beginning.

__________________
George
90 S4 Grand Prix White (Murf #5)
94 GTS 5-Speed Midnight Blue
06 Cayenne S Havanna/Sand Beige (PASM)
http://928.jorj7.com

Catorce

Nice.

I thought a GMG GT2 made it up to 216 a couple years ago?

jorj7

There was a GMG GT2 that ran in a Idaho Road Rally, which was a 3 mile standing start top speed run (2x as long as the Mojave Magnum or similar event) that hit 211 mph, but this is different then the Open Road Races that I was talking about, which are typically run over 80-130 mile sections of closed highways and have there "top speeds" recorded several miles into the course. With the Silver State Challenge, it's 43-45 miles into the course. Also, the driver/car is trying to maintain a "target speed" throughout the course, usually over 160 mph. This puts a real burden on the cooling, fuel, oil systems of the vehicle. There are a lot of Porsches that have run faster then 210 mph in the standing mile (or longer), but this is really a glorified "drag" race where horsepower counts the most, but none in the ORR races in Nevada, Texas, and Nebraska that I was talking about (at least that I know of since I've been racing (2000) or that I've found on the web).

__________________
George
90 S4 Grand Prix White (Murf #5)
94 GTS 5-Speed Midnight Blue
06 Cayenne S Havanna/Sand Beige (PASM)
http://928.jorj7.com

hacker-pschorr

Don't forget the Callaway Sledgehammer Corvette that cracked 250mph way back in 1988:

http://www.supercars.net/blog/1988-c...mmer-corvette/

jorj7

You and your Corvettes (and Cobras), I thought we were talkin' about 928s and Porsches. There have been many Corvettes, Camaros, "Winston Cup Cars", etc that have exceeded 210 mph in ORR and many other racing venues... The fastest car I know about in ORR hit 243.7 mph at the Silver State in 2013 in this "Charger":



At least I can say I was the 2nd fastest car in the speed traps that day...

__________________
George
90 S4 Grand Prix White (Murf #5)
94 GTS 5-Speed Midnight Blue
06 Cayenne S Havanna/Sand Beige (PASM)
http://928.jorj7.com

hacker-pschorr

Callaway started wit 928's.....

jorj7

You mean like Rich's 79 "Ex-Callaway Turbo 928":



__________________
George
90 S4 Grand Prix White (Murf #5)
94 GTS 5-Speed Midnight Blue
06 Cayenne S Havanna/Sand Beige (PASM)
http://928.jorj7.com