Who can make throttle shafts and install butterflies etc?

[Boosted LS1]

Thankyou for the help with this. Butterflies are 55mm items and because I'm using 3/8" shafts I'm hoping to buy suitable fittings from the US. Bronze top hat bushes are definately an option for the spindles. My friend may make a pilot drilling tool which references into the 4 chokes and against the manifold mounting face. This may be how to get the datum for the alignment of the spindle bores. We could probably drill from both ends then. I'll leave him to do it as and when he can find the time I guess. I know he wanted to make 'tooling' to enable me to do this at home

[Pumaracing]

GavinPearson said:

If it were me, I would look to use SU butterflies, shafts and bearings because they are very easy to obtain, the machining tolerances are known and all of the hardware to install them is readily available.

This is an absolute non-starter for several reasons. SU spindles have never been made for double bores and are very unlikely to be the right length for single ones on another system even if the OP wanted to use 4 spindles per bank and link them up. The butterflies are only made in sizes up to 2" on the old H and HD units and aren't readily available even then even if they were big enough which they aren't.

Weber DCOE bits are much more readily available and go up to 55mm bore. The spindles will no doubt have to be custom made though to suit this particular runner spacing.

[PeterBurgess]

You are totally wrong there Dave

SU made a twin choke carb, we were using them in 1987 for testing and racing.

Here is a link to a F1 Cooper on our rollers with twin choke sus, just before he went to do the Classic Monaco.

http://www.youtube.com/watch?v=G4lFNJGELmI





Peter

[Pumaracing]

I stand corrected. They'll still be no use here though.

[Mr2Mike]

With a single spindle of that length, isn't there going to be a danger that things could start binding under thermal expansion?

[Boosted LS1]

^ I'm going to use 4 spindles Mike and probably connect them as in the Kinslers above.

[Mr2Mike]

Boosted LS1 said:

^ I'm going to use 4 spindles Mike and probably connect them as in the Kinslers above.

Good plan Was thinking it would be a bugger to get them synchronised as well.

[Pumaracing]

I really wish I could see the Kinslers in the flesh to examine the details of the bearings and seals and how they machined and fitted it all. However if you can copy whatever they did I'm sure it'll be fine. We went totally OTT with our system to try and make sure nothing ever wore out. Stainless steel for the shafts so they wouldn't rust, high quality roller bearings on each side with built in dust seals held in place with cnc machined anodised aluminium carriers. Bloody daft really for what it all cost to make. They were a thing of beauty and designed to outlast the engine, the car and even the bloody owner but I can tell you for nowt, being an obsessive compulsive perfectionist and also trying to make money are two things that just don't go together.

Sometimes I wish I could bring myself to bodge things like every other bugger seems to do and consider it ok if it merely outlasts the warranty period.

[Boosted LS1]

CDO the correct way to spell out OCD

[PeterBurgess]

Mike, steady hand, keen eye and battery powered drill

Dave, I agree 100% with you , I shall never make money at what I do but I have a living and I can look in the mirror knowing I haven't cheated anyone. As I put on my website, there is a big difference between warranty and goodwill and to me goodwill has to go a long way.
I did a dyno on a B the other day and what makes it worthwhile for me is this email I received from the customer,

"Hi Peter,
sat at home reflecting on the day and decided I shouldn't let it pass without thanking you for “going the extra mile” whilst tuning my mgb. Sadly we all get used to mediocrity these days,
so when someone comes along with enthusiasm and an eye for detail I for one think they should be applauded.
Your outstanding reputation is deserved,I have no hesitation in recommending you to others. My return journey was in a happy car with a happy driver. Thank you,
Steve Pashley."

Peter