blown 87

I wondered about that also, and asked that very same question.
Brett has posted that he is getting fuel off of the injector rail.
If this is the only thing he has done to the fuel system, it is not going to be pretty.

AO

When is this run supposed to happen? I want to mark it in my calendar.

bcdavis

Regarding the risk thing, it all depends on how much you want to try to protect your own life. Some people are overly paranoid about every risk. Statistically, you are all probably more likely to die in your street car, in a normal accident. So if you were all really concerned about your lives, you'd all be driving big SUVs or some safer care like a Volvo or something. Or wearing helmets every day. Sure, there is a "chance" that something could go wrong. But it's also possible that all that will happen if the engine blows is that it will make a lot of noise and smoke, and just slowly decelerate. I just think it will be a shame to waste all his work and money he's putting into the car, and have to rebuild it if he crashes it or blows the engine. It would be smarter to wait a few more months, and make sure the system works as it's supposed to. If the engine really is strong enough, it ought to be able to make more than one run at that power level. So running it a few times on a dyno at lower horsepower levels should be able to tell you if the fuel system needs to be upgraded, etc. Let's say you run it on the dyno at 700 horsepower, and the engine blows? Ok, then you know the system would not have worked at 1000 horsepower anyhow. But you blow the engine in a safe location. And with the same result. The bottom line is that it will either hold together on the dyno at max power, or it won't. If it holds together, and you put down 1000 horsepower, then you are ready to do your top speed run. If it blows, then it's a safe way to grenade the engine, and you can go back to the drawing board...

Bill Ball

The relative safety argument may be true for bombing around in most cars, but everything changes above 200. Aerodynamic issues, tire performance, suspension and the results of any otherwise minor mishap are greatly magnified. In open road racing, I can't recall anyone seriously hurt below 200MPH, but above 200, it's a different story. I am concerned about his safety equipment. - a full rollcage and fire suppression system would seem indicated.

Brett928S2

Hi Bill

I see your point regarding safety but you need to understand mine...

I want to be the fastest Porsche in the UK, by that I mean I want my "daily driver" to be the fastest Porsche...not a race car...

I have already lost the 2 rear seats , although once I have done my runs I will take out the race seat and harnesses and put back my comfy leather 928 seat and get one of the rears back...

There were various options when I considered all this, such as full cage, auto fire sytem, naca ducts for aerodynamics, stripping interior for weight saving etc...

In the end I decided to do as few alterations as possible, I don't mind a little more risk, and I have made it as safe as I can within my own limitations..

Race seat, 6 point harnesses, Extinguishers, 18 inch wheels with oversize tyres, 3 layer Nomex suit, Underwear, FIA helmet, etc etc

Now if that lot doesn't help then its really not my day lol

So a fast daily driver it is............lol

All the best Brett

drnick

brett, forget all this bollocks about safety - is it fast??! actualy, i only started to go faster at the ring once i had a cage installed and that had little to do with the stiffer chasis

Tony

Geez, George, I wasnt aware of that. Sad. For a guy who has done what he has done, flown fighters...rolled a Porsche a triple digits, etc etc. Im glad he went peacefully.

Ok, back on topic.
Brett, i was seeing loss in fuel pressre when only trying to get 400+ HP. You have to address the fueling capability of the pump. Doesnt mean squat if you can get it out of the rails.....you have to get it there first at the correct amount of volume/pressure.
IMHO, if the basic principle of using a bigger fuel pump hasnt been addressed i worry about what other basic things may be overlooked.

as always, good luck with it all.

Brett928S2

Hi Nick

Fast lol....well...

I did some testing of my new system on Sunday...on a track of course as I would never do these speeds on the roads....lol...

I changed up from 3 to 4 on my autobox under kickdown at around 120 ish, then brought in the Nitrous.....and spun the back wheels at around 125....now THAT was fun, if a little hairy as I wasnt quite expecting it

So yes I think fast and that was only using 500 hp

All the best Brett

Brett928S2

Hi

Take my word the fuelling will be sorted before my runs

All the best Brett

H2

My bad...It wasn't a Porsche that had the high-speed tire failure at a Nevada Open Road Race. Below is a quote from an earlier post made by George S. (Search his posts in Rennlist for some exciting high-speed runs):

"Well I'm back from the Bonneville 100. The race
was shortened due to the tragic death of Bud
Ridenour Jr. His '01 Corvette crashed at 210
mph and he died of severe chest trauma. The
engine ended up in the passenger seat, and parts
of the car were scattered for over a mile.
It really put a damper on things. Bud was well
known and liked in the open road racing community."

Here's another older Open Road event....but a Porsche wasn't involved here either (BTW, I don't think that record is still standing). Also, here's an idea for a sponsor for a car in next year's run. Wonder what kind of decals they'd want posted on your car? On in this case, Brett's Nomex suit.

"The first Silver State Classic had ideal conditions because the 94-mile stretch of highway dedicated to the race was newly paved. RJ was the driver, with Joe Pettit as co-driver.... The time ended up being a record that still stands today: 27 minutes, 54 seconds, averaging 197.99 mph with a top speed of 222 mph! The race was a bit scarier for RJ’s father, who began in 5th position in a highly modified 1991 Corvette. Having passed the 4th-place car, the race was going well until Dan saw a long column of smoke rising into the air in the distance. Going 170 mph, he came upon it quickly and was horrified to see a red car in flames and mangled beyond recognition! His co-driver Russ Persely caught a glimpse of a 5-spoke chrome wheel (Big Red had mesh-type gold wheels) and reassured him that it was must not have been Big Red, but instead the Testarossa, which had started second. As it turned out, it was indeed the Testarossa and the driver was thrown from the car and seriously injured. He was airlifted by helicopter to a nearby hospital. Unfortunately for his co-driver, the accident was fatal. ... This was about 20-25 years back. Beautiful, gorgeous area. And full-on ***** houses are still legal in the area, and sponsored some of the cars entered!"

H2

Bill Ball

Brett:

OK, you can forego the cage and fire supression system at your risk, but at least take a closer look at aerodyanmics. A splitter will help keep the car on the ground. At 200+ it makes a big difference. I don't know if you have one installed or not. Also, getting the ride height down while keeping the camber as close to the minimum (preferably -0.7) as possible helps stability. I assume you have some good shocks and stiff springs.

Vlocity

And dial all the caster into the car that you can.

Ken

drnick

my 79 has over 7 degrees of caster, but i struggle with gaining enough camber on just one side.. dosent look like its taken a knock either, still havent got my head around the earlier cars vs the later ones in suspension terms.

brett, spinning the wheels in 4th at 120 mph is pretty crazy but.. iirc there is an added effect of the torque converter as you go through the transition between 3rd and 4th acting to multiply torque?? still, thats just monstrous. alexs brother has just bought a supercharged bread van and i havent heard from either of them for a couple of days, they must be either in hospital taking dinner through a straw or simply wreaking havoc around the streets of greenwich! power is nothing without insanity eh?

Imo000

re the fuel lines big enough to support this much HP? I know some of the hp is from the N2O but the supporting fuel lines has to be big too.

Tony

What about zero toe on all the wheels to reduce drag? Hes only going a short distance.