Tyre Size

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190251cars
Posts: 22
Joined: 28 Jun 2022 08:07
Location: Exeter Devon

Re: Tyre Size

Post by 190251cars » 11 Aug 2022 07:11

Hi Keith, It was Castle hillclimb near Lostwithiel in Cornwall.
Didn't do well I'm afraid as the gearing made it very difficult to pull away on the very steep start.
After getting into second gear that's where it stayed until completing the course!
4.5-1 crown wheel and pinion going in next week to make it (hopefully) get nearer the rest of the class.
Wiscombe Park on September 3rd/4th and on the 10th also.
Wish me luck.

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scotty
Posts: 481
Joined: 12 Nov 2019 14:28

Re: Tyre Size

Post by scotty » 11 Aug 2022 08:39

Well done, the diff will make a big difference.

Keith Bennett
Posts: 1496
Joined: 09 Nov 2019 21:40

Re: Tyre Size

Post by Keith Bennett » 11 Aug 2022 10:53

You don't need luck - you're in an A40. Wot you need is low cunning and a heavy right foot!

190251cars
Posts: 22
Joined: 28 Jun 2022 08:07
Location: Exeter Devon

Re: Tyre Size

Post by 190251cars » 31 Aug 2022 15:41

Well since my last outing in the car I have lowered it another inch at the front and changed the diff.ratio,
it's now a 4.55-1 and made a fantastic difference.
2 day event (Sprint) at Portreath in Cornwall and came home with a first in class on Saturday and repeated again on the Sunday.
A40 sprint.jpg

Keith Bennett
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Joined: 09 Nov 2019 21:40

Re: Tyre Size

Post by Keith Bennett » 31 Aug 2022 16:50

Warmest congratulations on the wins - and we're glad our website was of some use!

190251cars
Posts: 22
Joined: 28 Jun 2022 08:07
Location: Exeter Devon

Re: Tyre Size

Post by 190251cars » 31 Aug 2022 18:06

Thanks Keith, it has been a lot of use and thanks also to Derek Minter for his speedy spare's supply!

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scotty
Posts: 481
Joined: 12 Nov 2019 14:28

Re: Tyre Size

Post by scotty » 31 Aug 2022 20:57

Well done, looks like you could now lower the back at least the same, this should also help a lot. Stiffer front anti roll bar would help, possibly stronger front springs, but only one thing at a time, then you know what works and what doesn’t, also how the differences feel.

190251cars
Posts: 22
Joined: 28 Jun 2022 08:07
Location: Exeter Devon

Re: Tyre Size

Post by 190251cars » 01 Sep 2022 07:28

Thanks Scotty, New lowering blocks for the rear arrived yesterday so that is the next job. I'm loving this car and I am surprised how well it handles even now.
Wiscombe this weekend and next Saturday, watch this space!

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scotty
Posts: 481
Joined: 12 Nov 2019 14:28

Re: Tyre Size

Post by scotty » 01 Sep 2022 12:54

As you are using lowering blocks at the back, you may need tramp bars if you start to get axle wind up with that low diff.

190251cars
Posts: 22
Joined: 28 Jun 2022 08:07
Location: Exeter Devon

Re: Tyre Size

Post by 190251cars » 01 Sep 2022 16:02

Thanks for the advice, lowering blocks from Peter May are now fitted so we will see how it behaves at Wiscombe.

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