It's Official Andy's faster than the Zonda !!!!!!

[ultimaandy]

blimey can I ramble ................

[Sparks]

ultimaandy said:

blimey can I ramble ................

Maybe....

I don't know if you have anything like this, but I have a 'cartest' program, that allows you to enter all the car spec, and gives an indication of the speed/acc. quarter mile etc, but maybe more importantly, optimum change points.

Let me know if you want a copy. (just over a meg).

As for the brakes, can you not get the MOT station to do a brake test, which will give you the force on each wheel, and then look at using trial and error to home in on the balance? Or am I talking bo11ocks?

Sparks

[USCANAM]

ultimaandy said:

Anyone know of an effective brake set up method that doesn't involve locking the wheels on the road to see which ones break first. I really want to know how much work the rears are doing now compared to the front at the moment to see how far they are out.

Andy
This is the way that Carrol Smith recommends as a starting point for adjusting brake bias. I works very well for me on my two racing cars.
1. raise all wheels off the ground.
2. while one person rotates the front wheel, another person depresses the brake pedal until the front wheel JUST locks up, and cannot be turned. Person on brake pedal has to HOLD THAT pressure.
3. Adjust brake bias until rear wheel can JUST be rotated holding the above brake pressure. Obviously, once a bias adjustment is made, you have to go back to step 2.
For a wet track condition, I have found that having all wheels rotate at the same brake and rotating force is a good starting point. I just make a note of the number of clicks on the bias adjuster for dry or wet conditions.
Hope this is of some help
Jack

[chewy]

Andy - you keep up the rambling.
I assume you have the G50 gearbox. I have the Getrag box on which first gear is very low and so I always set off in second. What is second like on your box? could this be used for getting off the line quickly or would it be too hard on the clutch whilst maintaining reasonable revs.

[domster]

Andy has the four speed Turbo box. Not the same as a G50 IIRC.

Maybe they call it a 930 box? I'm sure Andy will butt in.

PS Well done Andy, I have reserved a copy of Autocar, figuratively speaking

[ultimaandy]

USCANAM said:

Adjust brake bias until rear wheel can JUST be rotated holding the above brake pressure. Obviously, once a bias adjustment is made, you have to go back to Jack

Alas the reason why I find it so hit and miss is that I have not installed a remote bias adjuster...... I have to get the spaners out and crawl under the dash and do it at the pedal.

I only wish I had had the forsight to install this even if it was just for set-up and removed later.
Don't they clash with the throttle pedal? but I suspect that could be got around if it was only a temporary feature.

Will try that set up procedure though, think I may be able to rig somthing that will allow a constant presure to be applied.......


Domster is right I have a four speed that allows 59mph in first and 100mph in second (just)... it also goes on to allow 212mph in 4th. but I've only got as high as 184mph before running out of track.

Its because a higher diff is available for this box than the others so it raises all the ratios.

Not tried taking off in second, but I suspect it would bog badly or light up the rear tyres.

Maybe another trip to the strip to see if I can get a sub 7sec time to 100mph is in order!

[Stig]

I thought that the G50/00 that I've got installed would be a good all rounder, however, I reckon it could be longer leg'd. Coming back from Le Mans it was pretty clear that I'd be on the rev limiter at about 175-185mph. Not a problem I suppose, as it's rare that I'd do that sort of speed.

If I was going to do a 0-60 or 0-100 run I reckon I'd have to start in 2nd, as the gearchange isn't exactly fast. I keep selecting 5th after 2nd too -

[msv]

ultimaandy said:

Anyone know of an effective brake set up method that doesn't involve locking the wheels on the road to see which ones break first. I really want to know how much work the rears are doing now compared to the front at the moment to see how far they are out.

If you know the piston sizes of the front and rear calipers, and the disc sizes, I would be glad to calculate the most appropriate master cylinder sizes for your configuration.

Mark

[snaketorque]

GTRCLIVE said:

Today we where at Bruntingthorpe, and Andy's Can-Am was timed at 3.8 Sec's to 60 and 7.43 Sec's to 100. The Zonda and Lambo where there as well. Zonda 0 - 100 7.47 Sec's. Lambo Mucythingy was alot slower. Well Done Andy for holding up our Ultima Flag....

This has been taken somewhat out of context, what was the actual 0-100-0 time as this was what the day was all about.

[Steve_D]

I may be talking out of turn but believe the participants were asked to keep quite until the mag is published. This is why they have only mentioned incidental times/speeds and not the results of the days objective.
Steve

[ultimaandy]

I have been trying to keep this in context.

Thought I had made the point about the brakes and how despite being quick accelerating I had trouble on the brakes and thus not good overall times.
I think I was around 2 seconds off the pace on the brakes so gives you an idea as to how much of a problem I had.

I was/am very aware that the point of the day was to find the 0-100-0 times, and despite the acceleration runs being good I was very disapointed with my overall times.


Also remember I doubt AUTOCAR will be too happy with us disclosing their information, after all, it was them that obtained it for use in their own publication.

There was a lot of very interesting machinery there and I think it will be worth reading regardless of Ultima interest.

[ultimaandy]

Confirmed..............

Still way too much front brake bias, I took the car down the local garage at lunch and tried it on the brake testing station.

The fronts build pressure very quickly and lock at around 190, to lock the backs I had to put more pressure than I could ever apply on the road.... probably 3 times the pressure than the fronts.

Once they did lock they all gave around the same 190 to lock, so they are fairly even which is good.

Shame I didn't do this a week ago!