Vmax today ultima

Vmax today ultima

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200Plus Club

Original Poster:

10,668 posts

277 months

Saturday 25th March 2017
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Anyone on here in the red ultima today at brunters ? Top speed achieved if so?

Ultimike

182 posts

106 months

Monday 27th March 2017
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That was me.

Unfortunately a gear linkage issue ended my day early before I could get a good run in. It was easily fixed but frustrating the day ended early. However I will be at the next one and hope to have better luck. Knowing me it will probably rain!

confusionhunter

448 posts

221 months

Monday 27th March 2017
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i think for Vmax it helps to get a higher top speed if you remove the wing but not sure Id want to loose the stability!

200Plus Club

Original Poster:

10,668 posts

277 months

Monday 27th March 2017
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Just wondered as we were there in a 911 turbo. Was a cracking day. 191mph us.

V8Dom

3,546 posts

201 months

Monday 27th March 2017
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i tried that on the run way and with front splitter fitted it was too unstable at 120 mph
so next run fitted wing back on and removed second element

Ult-Jim

624 posts

189 months

Monday 27th March 2017
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Sounds like an excellent opportunity to test your gear mechanism/ clutch, gear ratio actual top speed, and perfecting aero balance. I hope you got some good data out of the experience, (please share your thoughts) and did not trash your front end body work too much if not protected. I looked into going there once, but was encouraged to join some elitist car club with a posh website. So joined PetrolHead Nirvana and thrashed it round Wales (EVO triangle smokin) and Europe instead with real car enthusiasts bandit. That proved a good testing ground that showed up a few weaknesses ( in my Ultima GTR at least) in the bendy stuff, on the autobahn, at altitude and in an European heat wave. The car and myself are better for the experience.

Ultimike

182 posts

106 months

Wednesday 29th March 2017
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Tweaks to the gear linkage have already been made and it's much better now.

I found the car to be much more stable than I expected. Which i have no doubt is due to the recent geomerty set up done by Charles Dunn. I only did 3 runs one of which I had to abort so only reached a top speed of 161mph. I ran with a rear wing and front splitter. I had the dampers on a soft road setting of five clicks only. The SBC's rev limiter was set to 7,000 rpm and I planned to harden the dampers as I did more runs to see the affect this would have.

As mentioned I was pleased how well the car behaved on the road at speed. Although I had a problem with the linkage the new G50.50 box performed well. (My G50.01 is available for anyone that needs a fantastic box for acceleration and track use) and I left feeling not to disheartened as on the whole the car performed very well and that by ensuring I get a better start (not so much wheel spin) and by utilising the whole of the available rev range the car has a lot more to give with a top speed of over 180mph feeling very obtainable.

As for stone chips Bruntingthorpe sweep the runway before the event and the cars run wide apart and in pairs only, so a pebble dashed bonnet is unlikely and it's the low flying birds you have to watch out for!

200Plus Club

Original Poster:

10,668 posts

277 months

Wednesday 29th March 2017
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my friend came 3rd overall in the 9e28 Porsche 911 Turbo, 195mph. £ for £ they have to be a performance bargain, £70k car with mods.

845ste

577 posts

126 months

Thursday 30th March 2017
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I without front splitter vmax in Monza was approximately 180mph.
the front it was very lightened at high speed.
shock absorbers in the middle clicks.

eith rigid shock absorbers to vmax is very unstable at high speed and problem with braking (block wheels)

Ultimike

182 posts

106 months

Thursday 30th March 2017
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A front splitter is a must if you are going to run vmax and you want to be stable at high speeds.

2001ultima

234 posts

154 months

Friday 31st March 2017
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confusionhunter said:
i think for Vmax it helps to get a higher top speed if you remove the wing but not sure Id want to loose the stability!
Yes, I would agree. in a 1/2 mile I increased 10 mph by removing the wing. With the wing it feels like you have a parachute tied to the back.

Thevet

1,787 posts

232 months

Friday 31st March 2017
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When I went a number of years ago, the factory recommended just to remove the smaller of the two wings. Stability over 160 was virtually perfect, you could take your hands of the wheel and the car did not move at all, first run was amusing as my door started to open at about 150. Eventually we hit 199 on the car speedo, but couldn't crack 200 due to driver skill and running a rather tall 5th gear from CMS which gave too big a gap from 4th, but given another mile or two probably could have got well past that, although the fuel would probably have run out first.

Ultimike

182 posts

106 months

Friday 31st March 2017
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199mph that's a good effort. Which engine, Bhp and gearbox were you running?

200Plus Club

Original Poster:

10,668 posts

277 months

Friday 31st March 2017
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Ultimike said:
199mph that's a good effort. Which engine, Bhp and gearbox were you running?
It's a friends std 997 turbo engine but has hybrid turbos, uprated intercooler and race cats etc. 9excellence tuned it, I think it was about 20k worth of mods Inc suspension. Standard 4wd etc. It went 202mph last year with a tailwind there. 650bhp or so

deadscoob

2,263 posts

259 months

Saturday 1st April 2017
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Easiest way to get to 200mph.


bluesatin

3,114 posts

271 months

Saturday 1st April 2017
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In the early days of vmax I did approx. 30 runs in the Ultima. SBC at 6400 rpm limit and standard G50 it would hit the rev limit just below 170mph 1/3 down the runway. Changed the gearbox and got over 180mph. Never did bruntingthorpe with the LS7 which should easily get the 200mph. Front splitter, rear wing and adjusted brakes make for stunning braking!

deadscoob

2,263 posts

259 months

Saturday 1st April 2017
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Only a tuned ls7, no chance with std. Ultimas need a lot of power to crack 200 in that space, easier ina Porsche, much more aerodynamic

845ste

577 posts

126 months

Saturday 1st April 2017
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BLUESATIN: How much HP have you?

Wich CX have Ultima?

I do not think the 911 is much more aerodynamic.
For ex, GT 2 with over 600hp, does not reach high speeds ...

deadscoob

2,263 posts

259 months

Sunday 2nd April 2017
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A 997 and 996 turbo, let alone cooking models, is much more aerodynamic than an Ultima.

Why do you think these 650hp 911s can hit those sort of speeds in that distance, despite accelerating more slowly to 150 than equivalent powered and geared Ultimas?

200Plus Club

Original Poster:

10,668 posts

277 months

Sunday 2nd April 2017
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650bhp in a 997 will do the trick