www.YamahaR.co.uk

SO WHY THE SPITFIRE BODY SHAPE?

The next stage of development for the Hornets, would be a sports racing car (look like Le Mans prototype cars or a Radi…login to view the rest of this post

Good start :D

The Mk4 weighs 530kg on the start line with myself and fuel on board, which is quite light for a car, but much more than your bike. The …login to view the rest of this post

Hi Kyle

The Mk4 with the TLR engine never used any clutches, though it did seldomly suffer a bit of clutch slip at around the peak torque rpm in 4th an…login to view the rest of this post

SO WHY USE THE R1 4C8 ENGINE?

After the experience of the Hornet Mk4, I am hooked on bike engines in race cars, but the TLR engine doesn’t produce anyw…login to view the rest of this post

Well you've talked me into starting a project thread, and Bub has kindly transferred posts from other threads, so I suppose I should give some backgro…login to view the rest of this post

Hopefully Bub is going to transfer existing relevant posts from the Newbies board and the 4C8 board to this thread, and then I will add some more info…login to view the rest of this post

Glad you like the project, I feel a bit of a fraud with it having 4 wheels!

I have started a project thread at http://www.yamahar.co.uk/viewtopic.php?f=38&t=11905" onclick="window.open(this.href);return false;
Bub, if you could transfer the relevant posts from the newbies and 4C8 boards, that would ...

Hi

I'm afraid this project relates to a 4 wheeled machine rather than 2 wheeled, but at least it uses a Yamaha R1 4C8 engine …login to view the rest of this post

I have managed to upload some photos in the newbie section
viewtopic.php?f=3&t=11887&p=179629#p179629" onclick="window.open(this.href);return false;…login to view the rest of this post

currently designing the exhaust, which is why I joined the forum as I needed to know the cam timing for the exhaust cam. Thankfully Kylezx7r was able to give me the required info at viewtopic.php?f=14&t=11888" onclick="window.open(this.href);return false;

Heres a view with a Spitfire fibreglass bonnet in place. The bonnet needs the wheel arches cutting out and moving 3" higher and 2" out. The back of the bonnet needs cutting off and moving 12" further back, then the gaps need filling and a bulge for the airbox needs to be fitted. A mould will be ...

Here is a view from the back with the rear subframe and diff in place

Well that seemed to work ok :D

The bulge in the bonnet is for the airbox on the engine, which gives you an idea of how far back it will be. The engine is rotated through 90 degrees so the face of the sprocket is towards the flange on the diff. The sprocket is replaced by an adaptor for a propshaft ...

I will try and upload some photos:

Not fully decided on body shape yet. I was thinking of keeping it the same as the Hornet Mk4 ( yellow car in the youtube clip) but quite fancy the idea of a classic looking car inspired by the Macau Spitfire that in Macau in the sixties. This is what I am trying ...

Bear with me, I will try and post some photos …login to view the rest of this post

Thanks

Thanks Kyle, I was able to use the info last night to calculate the length and diameter of the exhaust manifold I will be making (engine in a car not …login to view the rest of this post

Thanks for the warm welcome.

I will sort out a photobucket account and post up some photos.

In the meantime, here someone else's in-car footage from the Plum Pudding races at Mallory Park on Boxing Day last year. The Suzuki TLR powered car is the yellow one (number 33), which is a couple of rows ...

Hi Kyle
Thanks very much for the quick response
I don't think I have enough posts to be able to send PMs, but if you could e-mail it to fletch799at…login to view the rest of this post

Hi, does anyone know what the standard cam timing is for the 4C8 engine?

I am specifically interested in how many degrees BBDC the exhaust valve open…login to view the rest of this post

Hi,

Just thought I would introduce myself. I had a bike donkeys years ago but soon realised it wouldn't be too long before I did myself a nasty mischief and so designed and built a little sports car in the 80's. I then went on to fit a Suzuki TL1000R V-twin in one of them, and I am currently ...