16-08-2022, 10:32 AM
Another case where a bit of reading up on exhaust designs before attempting making one is a great help. Years ago I read up various designer instructions, some going into and giving mathematical formulae for various size/configuration of engines. Vaguely I remember the 7 required 1 inch internal diameter and (on a long wheelbase chassis) the end came out just in front of the rear wheel (though that may have been for a BMC A). Ah I thought, that will also allow the flames coming out to warm up the tyre compound ![Big Grin Big Grin](https://www.austinsevenfriends.co.uk/forum/images/smilies/biggrin.png)
Dennis
![Big Grin Big Grin](https://www.austinsevenfriends.co.uk/forum/images/smilies/biggrin.png)
Dennis