Vmax today ultima

[Thevet]

The engine in the car I had was a supercharged 406ci with 650 hp, we did not have a front splitter and frankly I doubt it would have felt any different. The box was a G50-03 from the factory but I changed the 5th to a rather long CMS gear, which was really so easy to fit and change. Maybe I was just lucky in the set up of the car but it felt sooo unbelieveably good and stable over 160. My only disappointment at Vmax was a combination of too long a top gear and/or not enough power......you can never have enough for top speed.

[chuntington101]

Time for a bit of N2O then. Will help with cooling and making more power!

[bluesatin]

845- the engine was a 520 AS Enforcer with a few mods done by Charles Dunn. The Porsche is much more slippery.996 x50 turbo used to do mid 180's with 450 bhp, the 997 turbo a bit more. Don't forget that the Ultima was designed in a shed in Hinckley (sorry !!) . I think Porsche had a bit more time and resource on the development.

[845ste]

997 gt2: 530hp max 328kmh max
997 gt2 RS: 620hp 330kmh.max
with equal geared.

in a 1/4 I believe that influence very well the Nm.
fundamentally it is an aerodynamic problem, given the differences hp.

I seem to have read that the ultima gtr was developed by Lee Noble, based on an existing project of one of the cars racing in Endurance ...
in any case there are many videos in which they try in the wind tunnel the Gtr ...
.https://www.youtube.com/watch?v=XakY1-abK7w

I remember that the McLaren F1 was developed on 3 mules Gtr ... and in fact the design is very similar.

I am convinced that it would be enough to compare CX.

[BogBeast]

Thevet said:

. My only disappointment at Vmax was a combination of too long a top gear and/or not enough power......you can never have enough for top speed.

Amen to the power > https://youtu.be/VDTmhH6HVGM

Lovely car too...

[V8Dom]

mine is g50/52 box and on standing start did a 182, so i recon i could knock on the door of 200 if brunters with a few mods if its 2 miles?

air resistance is the problem. to 160 its easy after that it struggles.. the underneath of the car is all wrong... non flat floor, open floor in engine and the rear clip acts as a huge parashoot for the air to stop it. rear arches allow air to disapear inside etc(who knows a supercar without wheel liners?

if just for brunters id fit an engine under tray , rear wheel tubs, remove mirrors, splitter and top of wing to start with and see how it does..

mine is quiet powerful so i dont see why its not obtainable 200-210

[deadscoob]

I reckon 800+ to get 210

[V8Dom]

noble m600 did a 205

i see the new vmax is staright only standing stant, not the start on other side and arround 180 bend fast already doing 60-70 as entering main runway

theres a black ultima that did a 203 in the wet in 2014 gtr1000

Edited by V8Dom on Wednesday 5th April 00:03

[deadscoob]

M600 more aerodynamic.

How much power did that black one have? Way more than 600...

[845ste]

.....the factory with 700hp declare over 200mph...... limited gear ... they write ...

[deadscoob]

Have never said an ultima wouldn't do 200mph, mine will, eventually.

Have said you need a lot of power to get to 200mph at Bruntingthorpe. A 650hp Ultima won't hit 200mph there.

[deadscoob]

Interesting, I'll go and get some humble pie

Richard,
Do you have the Datron info for that too, would be interesting to see the 150+ data.

That was with a G50 03 with the longer 5th?

Cheers

[200Plus Club]

Ultima factory said:

deadscoob said:

Have never said an ultima wouldn't do 200mph, mine will, eventually.

Have said you need a lot of power to get to 200mph at Bruntingthorpe. A 650hp Ultima won't hit 200mph there.

204mph GPS verified by an official from Datron Technology at Bruntingthorpe with 640bhp at the flywheel (not the wheels) on the American Speed bench dyno:


http://www.ultimasports.co.uk/Content.aspx?f=recor...


Regards to all,

standing start or rolling start coming off the bend? and over what distance in total please?


I've gone 202mph standing start in the 997 and 213mph in a heavily modified porsche turbo at the last 2 V max, was getting hairy for braking in the 213mph car!

[Ultimike]

Well mine has 640bhp on the AS dyno so it will be interesting to test it with my G50/50 On the 6th of May.

I expect to achieve 185mph but welcome the factory input in how i can achieve more.

[200Plus Club]

Ultimike said:

Well mine has 640bhp on the AS dyno so it will be interesting to test it with my G50/50 On the 6th of May.

I expect to achieve 185mph but welcome the factory input in how i can achieve more.

very interesting, 200mph or bust! :-)
you can see at the last vmax how difficult it was, into a 10mph headwind, the veyron only managed 200 etc. last time out a veyron pissed 218mph in the same distance, albeit with a decent tailwind. the Nissan Juke GTR thingy did 222mph!

[200Plus Club]

Ultima factory said:

200Plus Club said:

standing start or rolling start coming off the bend? and over what distance in total please?


I've gone 202mph standing start in the 997 and 213mph in a heavily modified porsche turbo at the last 2 V max, was getting hairy for braking in the 213mph car!

We tried a standing start and also a rolling start coming out the bend at high speed and it made zero difference= 204mph both times.
I'll have to see if I can dig out the data, this was 13 years ago. We had plenty of space left to brake and make the first corner off the straight and was telling myself off for braking way too early.
Got 380bhp extra and 375ft lbs torque extra to play with now. (same engine bench dyno).


Regards to all,

are you bringing it to vmax on the 6th May, will be cool to see how it does on v box on the day. the holy trinity cars are there also, and another veyron or two

[845ste]

Factory, you know which is the CX of GTR, please?
Maybe you have it detected during tests in the wind-tunnel.
thanks
ste

[V8Dom]

Ultima factory said:

Ultimike said:

Well mine has 640bhp on the AS dyno so it will be interesting to test it with my G50/50 On the 6th of May.

I expect to achieve 185mph but welcome the factory input in how i can achieve more.

Some basic tips:

The best combination for a balanced front and rear down force with minimal drag was achieved using the front splitter and the rear wing set at zero degrees with the top flap removed. This is our recommended settings for high speed 200+mph runs.

Ensure you have full throttle by sitting in the car with engine turned off, pressing throttle fully and have somebody check the carb is fully opened. Around 50% of customer carbed cars we see at the factory are not adjusted correctly to obtain full throttle.

Make sure full throttle is fully applied from 3rd gear onwards, easy to naturally use only approx 3/4 throttle.

Fit EVO body grills for less drag, particularly on the rear bonnet tailpipe and air entry zone.

If you have 640bhp it should achieve circa 204mph if conditions are favourable. Although what year was it last on the AS bench dyno at 640bhp (year 2006 according to our file) and has anything been altered on the engine since.

What is your engine rpm limiter set at?


Regards to all,

Edited by Ultima factory on Friday 7th April 17:43

if you have g50/50 whats it geared too?
i thought topspeed was 185 ish

my car has done 183 in standing mile, but i have g50/52 with tall 5th

dom

[Ultimike]

V8Dom said:

Ultima factory said:

Ultimike said:

Well mine has 640bhp on the AS dyno so it will be interesting to test it with my G50/50 On the 6th of May.

I expect to achieve 185mph but welcome the factory input in how i can achieve more.

Some basic tips:

The best combination for a balanced front and rear down force with minimal drag was achieved using the front splitter and the rear wing set at zero degrees with the top flap removed. This is our recommended settings for high speed 200+mph runs.

Ensure you have full throttle by sitting in the car with engine turned off, pressing throttle fully and have somebody check the carb is fully opened. Around 50% of customer carbed cars we see at the factory are not adjusted correctly to obtain full throttle.

Make sure full throttle is fully applied from 3rd gear onwards, easy to naturally use only approx 3/4 throttle.

Fit EVO body grills for less drag, particularly on the rear bonnet tailpipe and air entry zone.

If you have 640bhp it should achieve circa 204mph if conditions are favourable. Although what year was it last on the AS bench dyno at 640bhp (year 2006 according to our file) and has anything been altered on the engine since.

What is your engine rpm limiter set at?


Regards to all,

Edited by Ultima factory on Friday 7th April 17:43

if you have g50/50 whats it geared too?
i thought topspeed was 185 ish

my car has done 183 in standing mile, but i have g50/52 with tall 5th

dom

Using your spreadsheet Dom and gear ratios I found for the G50/50 online I think it's geared to 199mph at 6800rpm.

The rev limiter is set to 7,000 rpm

[Ultimike]

V8Dom said:

Ultima factory said:

Ultimike said:

Well mine has 640bhp on the AS dyno so it will be interesting to test it with my G50/50 On the 6th of May.

I expect to achieve 185mph but welcome the factory input in how i can achieve more.

Some basic tips:

The best combination for a balanced front and rear down force with minimal drag was achieved using the front splitter and the rear wing set at zero degrees with the top flap removed. This is our recommended settings for high speed 200+mph runs.

Ensure you have full throttle by sitting in the car with engine turned off, pressing throttle fully and have somebody check the carb is fully opened. Around 50% of customer carbed cars we see at the factory are not adjusted correctly to obtain full throttle.

Make sure full throttle is fully applied from 3rd gear onwards, easy to naturally use only approx 3/4 throttle.

Fit EVO body grills for less drag, particularly on the rear bonnet tailpipe and air entry zone.

If you have 640bhp it should achieve circa 204mph if conditions are favourable. Although what year was it last on the AS bench dyno at 640bhp (year 2006 according to our file) and has anything been altered on the engine since.

What is your engine rpm limiter set at?


Regards to all,

Edited by Ultima factory on Friday 7th April 17:43

if you have g50/50 whats it geared too?
i thought topspeed was 185 ish

my car has done 183 in standing mile, but i have g50/52 with tall 5th

dom

Hi thanks for your input.

2006 Sounds about right for the dyno. As you know the engine has been rebuilt by Charles Dunn since then, so I expect it to be as good or if not better than before and the rev limiter is set at 6,800 or 7,000 rpm.