Who can make throttle shafts and install butterflies etc?

[Boosted LS1]

Hi, I've got some cast aluminium throttle assemblies that need shafts manufacturing and then I need the butterflies fitting etc. I know it's going to be complex work and haven't found anybody who does this work in the UK. Has anybody got any pointers?

[Boosted LS1]

Pumaracing said:

Why do the people who made the castings not have the rest of the bits or is there more to the story than meets the eye? I could potentially point you in the right direction as I used to make TBs myself but as one offs it would be a very expensive exercise. Economies of scale is what makes these things viable. A little more info please.

Because they're my own patterns and now they're cast I need a machinist to finish them off

[Boosted LS1]

Thanks for the replies, keep them coming if you can help.

[Boosted LS1]

Here they are Dave. Since the picture was taken they've been milled and have had the chokes bored but my toolmaker friend can't get access to the machinery he needs to finish them at present. He works at a car manufacturing plant and the machinery is in demand. I plan to use two 3/8 inch shafts per casting.

[Boosted LS1]

Thanks for your advices Dave. The car plant has state of the art tooling to do the spindle boring, fit bearings. make the shafts etc. It's just he can't get onto it at the moment. I can buy off the shelf linkages from the US but it's really frustrating waiting to get the shafts fitted. Once he'd produced the first pair of tb's he was going to produce tooling to enable me to do a lot of the work 'at home'.

[Boosted LS1]

Thanks Dave. These are downdrafts for a chevy v8 and a bit similar to a pair of kinslers. There isn't a lot of room on top for individual tb's. If I'd gone the crossover route individual tb's may have been a better bet Oh well, I'll have to wait a bit longer

BTW I liked your billet items, above.

[Boosted LS1]

Pumaracing said:

I'm sure you've already sunk a fair few quid into what you've had done so far but before you go any further you really need to design and draw out in detail every other part of the system and work out whether this can actually be machined in the real world. Spindles, bearings or bushes, seals to stop air getting in past worn bushes, how to connect the spindles and balance them both within one unit and to link the two banks, injector mounts, fuel rails and how to attach those, somewhere to mount a throttle pot.

My inspiration came from these and I've done casting modifications of my own to allow a bit more versatility. They'll work Dave. The above comments have already been thought out. I just got let down on the drilling, bugger

[Boosted LS1]

Pumaracing said:

What sort of spindle bearings do those plastic ones have, how are they located in the castings and how do you intend to duplicate that in yours?

Those aren't plastic Dave, they're alloy, probably magnesium. They're painted black. We'll use a needle roller or a plain bearing.

[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

[Boosted LS1]

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

[Boosted LS1]

CDO the correct way to spell out OCD