Dax Rush Hayabusa Turbo
Discussion
Firstly, I have no affiliation with Dax, Duncan Cowper (top bloke), his engine builder or sponsors before someone pipes up, but I feel I should share with you the experience of a ride in his car!!! At Brands yesterday, I had a few good laps with him and words can hardly describe how good that car is. The power, 500bhp in a 550kg car is quite obviously in another world to most things we know, and downloading the data after showed, on slicks on a damp track, we hit 140mph down the start straight. But impressivly Duncan changed gear at about 120, and when he hit the power again my helmet ( trying to be sucked off my head at the time) was violently smashed back into the seat!!! Unbelievable power. The handling was just as incredible though, at no time did I sense any body roll of nervousness, even when he had it on boost and a half turn of oppo. I never even looked closely at a Dax before but the camber compensation kit seems to have a very positive effect! So do the dampers, he kindly gave us a detailed tour of the trick bits and the suspension is straight off a Le Mans LMP car, I didn't ask the price but they were 3-way adjustible and obviously well set up! Another thing of note was the engine not seeming obviouly of bike origin, just a mad thing, relatively quiet and turbine smooth. The car is a true feat of engineering in every way, and the Dax chassis obviously with the right bits bolted on is first class. The last thing that impressed me that much was a photo of Megan Fox in her swimsuit. Oh, and Mr. Cowper is quite a talented wheelman :-)
Cheers Duncan and Steve!
Cheers Duncan and Steve!
t scared out of me when he took me round brands in itrhinochopig said:
What put me off them, when I was looking for a BEC seven was their love of massive wheels.
Is it his car that is running the tubby of an F1 car?
By massive do you mean 17"? This is a can of worms as some cars are designed to run on smaller wheels, some on bigger. I guess its all in the setup?Is it his car that is running the tubby of an F1 car?
jason61c said:
rhinochopig said:
What put me off them, when I was looking for a BEC seven was their love of massive wheels.
Is it his car that is running the tubby of an F1 car?
By massive do you mean 17"? This is a can of worms as some cars are designed to run on smaller wheels, some on bigger. I guess its all in the setup?Is it his car that is running the tubby of an F1 car?
jason61c said:
rhinochopig said:
What put me off them, when I was looking for a BEC seven was their love of massive wheels.
Is it his car that is running the tubby of an F1 car?
By massive do you mean 17"? This is a can of worms as some cars are designed to run on smaller wheels, some on bigger. I guess its all in the setup?Is it his car that is running the tubby of an F1 car?
rhinochopig said:
You only really need big wheels - imo - to cover big brakes, which are less important on a 500kg car.
On a Busa turbo using a 3.14:1 Sierra 7" diff, even with a high ratio gearbox, you need big wheels to get the gearing for high speeds. Sure, you can get 13" competition tyres that have big sidewalls, but you won't get any high speed road tyres that are not low profile - hence the need for large rims.Epimetheus said:
rhinochopig said:
You only really need big wheels - imo - to cover big brakes, which are less important on a 500kg car.
On a Busa turbo using a 3.14:1 Sierra 7" diff, even with a high ratio gearbox, you need big wheels to get the gearing for high speeds. Sure, you can get 13" competition tyres that have big sidewalls, but you won't get any high speed road tyres that are not low profile - hence the need for large rims.They are designed for big wheels really, they're quite a big car for a 7. But variety is good
It's a fair point about gearing, but what an odd way of going about it, when there are so many pro's to using smaller (and thus lighter) wheels.
Re: Off-set and width. It shouldn't be a problem as you get any off-set you wish in a 13 - the likes of Image will build you exactly what you want.
Re: Off-set and width. It shouldn't be a problem as you get any off-set you wish in a 13 - the likes of Image will build you exactly what you want.
rhinochopig said:
It's a fair point about gearing, but what an odd way of going about it, when there are so many pro's to using smaller (and thus lighter) wheels.
Re: Off-set and width. It shouldn't be a problem as you get any off-set you wish in a 13 - the likes of Image will build you exactly what you want.
I have a set of Image 3 piece wheels on mine, 16" at the rear and 15" at the front, designed specifically for the Dax Rush and very similar to the wheels used by Radical. Can't remember how light they are but they are not the usual heavy, chav wheels you see on some cars.Re: Off-set and width. It shouldn't be a problem as you get any off-set you wish in a 13 - the likes of Image will build you exactly what you want.
13" wheels have been used on kit cars primarily because they are cheap and light and kit cars are usually small. The Rush is a bigger kit car and would look a bit odd with 13" wheels . . . like me sat in a narrow body westfield . . . the fit isn't good
A higher profile tyre on a 13 inch rim will give you the same diameter as a low profile tyre on a bigger rim.
For example, a 245 40 15, is the same diameter as a 245 50 13.
195 45 15 is the same as 205 55 13.
As for brakes, you should be able to get 275/280 mm discs and calipers in a 13 inch rim, which are plenty big enough to stop a small car.
I find smaller wheels, with higher profile tyres give better feedback, and break away a lot more progressively than a low profile tyre, which I think, tends to break away a lot quicker. With a 500 odd kilo car producing lots of power, can bite you in the ass if you don't catch it quick enough, and have you see the greenery flying by in reverse!
Give a better ride on the road too.;) All IMHO of course.
Anyway, whatever, Duncans car is a Monster!
For example, a 245 40 15, is the same diameter as a 245 50 13.
195 45 15 is the same as 205 55 13.
As for brakes, you should be able to get 275/280 mm discs and calipers in a 13 inch rim, which are plenty big enough to stop a small car.
I find smaller wheels, with higher profile tyres give better feedback, and break away a lot more progressively than a low profile tyre, which I think, tends to break away a lot quicker. With a 500 odd kilo car producing lots of power, can bite you in the ass if you don't catch it quick enough, and have you see the greenery flying by in reverse!
Give a better ride on the road too.;) All IMHO of course.
Anyway, whatever, Duncans car is a Monster!
rhinochopig said:
It's a fair point about gearing, but what an odd way of going about it, when there are so many pro's to using smaller (and thus lighter) wheels.
Re: Off-set and width. It shouldn't be a problem as you get any off-set you wish in a 13 - the likes of Image will build you exactly what you want.
Sure, you can if you want to pay to get custom ones made....but you're talking ££££ then.Re: Off-set and width. It shouldn't be a problem as you get any off-set you wish in a 13 - the likes of Image will build you exactly what you want.
The Black Flash said:
rhinochopig said:
It's a fair point about gearing, but what an odd way of going about it, when there are so many pro's to using smaller (and thus lighter) wheels.
Re: Off-set and width. It shouldn't be a problem as you get any off-set you wish in a 13 - the likes of Image will build you exactly what you want.
Sure, you can if you want to pay to get custom ones made....but you're talking ££££ then.Re: Off-set and width. It shouldn't be a problem as you get any off-set you wish in a 13 - the likes of Image will build you exactly what you want.
Mr Cowper at Brands
http://www.youtube.com/watch?v=1Wxdu9vE0RM
mickrick said:
A higher profile tyre on a 13 inch rim will give you the same diameter as a low profile tyre on a bigger rim.
For example, a 245 40 15, is the same diameter as a 245 50 13.
195 45 15 is the same as 205 55 13.
As for brakes, you should be able to get 275/280 mm discs and calipers in a 13 inch rim, which are plenty big enough to stop a small car.
I find smaller wheels, with higher profile tyres give better feedback, and break away a lot more progressively than a low profile tyre, which I think, tends to break away a lot quicker. With a 500 odd kilo car producing lots of power, can bite you in the ass if you don't catch it quick enough, and have you see the greenery flying by in reverse!
Give a better ride on the road too.;) All IMHO of course.
Anyway, whatever, Duncans car is a Monster!
I'd like to see 280mm brakes under a 13" wheel!!!!!!For example, a 245 40 15, is the same diameter as a 245 50 13.
195 45 15 is the same as 205 55 13.
As for brakes, you should be able to get 275/280 mm discs and calipers in a 13 inch rim, which are plenty big enough to stop a small car.
I find smaller wheels, with higher profile tyres give better feedback, and break away a lot more progressively than a low profile tyre, which I think, tends to break away a lot quicker. With a 500 odd kilo car producing lots of power, can bite you in the ass if you don't catch it quick enough, and have you see the greenery flying by in reverse!
Give a better ride on the road too.;) All IMHO of course.
Anyway, whatever, Duncans car is a Monster!
Lots of people run '7' style cars on 13/14 inch wheels thinking that they're light when they're not. I've got 17" oz ultralegerra's that weigh 6.5kg each, lighter than the Image wheels of the same size and the same weight as 7"wide CXR wheels in a 14" rim.
I agree big wheels that weigh a tonne aren't the way forward.
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