A stab into the past: Triumph throttle bodies and other part

911hillclimber · Post by **911hillclimber** » Mon May 03, 2021 10:46 pm

Gasp!
That looks good.
Please pm me when you have costs etc.
Graham.

gridgway · Post by **gridgway** » Tue May 04, 2021 4:31 pm

Does indeed look good. The PMO setup (not incl the trigger wheel, CPS, wiring, ecu etc) is $3400 by way of comparison.
http://www.pmocarb.com/products.htm#EFI/MFI

911hillclimber · Post by **911hillclimber** » Tue May 04, 2021 6:41 pm

I would have to balance the benefit for the race Lola against spending the money on making it rev to 7800 rpm and keeping the carbs and conventional ignition.

Madjad · Post by **Madjad** » Tue May 04, 2021 9:48 pm

Further development today, engine in and got the linkage working. Trial fitted the fuel distribution block, with built in pressure regulator

Can anyone lend me a rain hat, either fibreglass or steel, so I can get some amber fibreglass ones made?

Pictured with tall manifolds, and the prototype throttle bodies, with the injectors built in.

sladey · Post by **sladey** » Thu May 06, 2021 4:07 pm

Well it certainly looks cool

Bruce M · Post by **Bruce M** » Thu May 06, 2021 7:15 pm

Curious to see the injector fuel “hats”.
Are they bought in or made by you?

Madjad · Post by **Madjad** » Thu May 06, 2021 7:46 pm

Bruce M wrote:Curious to see the injector fuel “hats”.
Are they bought in or made by you?

Bought in parts

Bruce M · Post by **Bruce M** » Thu May 06, 2021 8:28 pm

Very curious then, if you don’t mind sharing. Sounds like it might have potential for 914/type4/type3 conversion to use modern injectors.

Madjad · Post by **Madjad** » Thu May 06, 2021 10:10 pm

Bruce M wrote:Very curious then, if you don’t mind sharing. Sounds like it might have potential for 914/type4/type3 conversion to use modern injectors.

I’ll dig out my invoice, and see how much I paid for them, I bought a bulk quantity to get the price right, then fit on a 14mm injector, and take a 8 mm hose.

They will need clamping down

Madjad · Post by **Madjad** » Tue May 18, 2021 10:27 pm

I’ve remade the patterns for the throttle bodies, and turned the shafts thro 90 degrees. I’ve prototyped the linkage, which is now being drawn for the laser cuts

gridgway · Post by **gridgway** » Tue May 18, 2021 11:14 pm

Just curious about the linkage and the pivot lengths and angles and what it does to the rate of opening of the butterflys and whether it in fact matters? What's the ideal "opening rate" profile as the throttle is pressed?

Madjad · Post by **Madjad** » Tue May 18, 2021 11:36 pm

gridgway wrote:Just curious about the linkage and the pivot lengths and angles and what it does to the rate of opening of the butterflys and whether it in fact matters? What's the ideal "opening rate" profile as the throttle is pressed?

The pivot lengths are the same as used on the Weber carbs. I’ll present the throttle bodies on a vacuum box

Madjad · Post by **Madjad** » Thu May 27, 2021 11:16 pm

Well I’ve progressed this a lot this week, and they are nearly ready to bolt on.
I just need to drill the vacuum ports

Madjad · Post by **Madjad** » Thu May 27, 2021 11:19 pm

I’ve also had them on my vacuum test rig, and they balanced nicely at 4, and at about 20. They are very similar to adjust as A MFI throttle body.

Madjad · Post by **Madjad** » Fri Jun 18, 2021 11:51 pm

Video of the 2.7 engine running with this EFI on my Facebook page Westbound Restorations

How do I post a video on here?

DDK - Die Deutschen Klassiker

A stab into the past: Triumph throttle bodies and other part

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other

Re: A stab into the past: Triumph throttle bodies and other