Throttleboddies / 6 cylinder matching & injection

[hotrubber007]

Getting tired of my 2500 s estate low power. Since my gt6 is getting its new powerplant all built up i thought to go saving some time by making two injection setups.

I'm going to a bike breakers soon but wonderd if any out there had already been through the 3 cylinder bike applications ?which might suit a quest for drivability and power.

Been trailing all kinds of sites but can find any inj inlets or similar home job manifolds. Having ther PI jobbos machined out-is obviouly ok,if you like vintage flow -

any ideas..

[hotrubber007]

as an afterthought has anyone tried tony harts conversion of stromberg type throttle bodies?

hes usually a pretty good guy in sgtag parts

[JonyPI]

you would be better off just machining out the PI bodies, set up with an emerald ECU and you will be onto a winner, I know a few 2L 6pots that run this and they work VERY well along with the engine mods!

[//j17]

Yep, easiest route for a Triumph 6 is to get a set of PI throttle bodies and have a machine ship re-cut the injector bosses to take modern EFi injectors. Everything is done for you then on the throttle linkage side though you need to work some magic to fit a throttle position sensor/MAP feed.

[hotrubber007]

thanks guys
its the obvious choice and i guess that's the route i'll take

cheers

[330p4]

you could look at the Triumph bike TB's they ar a triple
Ian

[VitesseEFI]

As already suggested, using the PI throttle bodies is the easiest route short of spending big bucks on TBs from Jenvey or similar plus manifolds. Bike throttle bodies from triples don't look to suit well as they are three-in-an-evenly-spaced row where the Triumph inlet are grouped in closely spaced pairs. You might find a set-up from a 4 cyl bike which will break into pairs with about the right spacing though.

If using the PI throttle bodies you should consider removing the individual butterflies and putting a single one in the entrance to the plenum. This does away with any balance issues and hugely simplifies the linkage. The Triumph stuff is not that clever and won't usually fit if you want to use a tubular exhaust manifold.

It's quite possible to make your own manifold - this one is just 30mm exhaust tube and 1.6mm steel plate. Works fine,


Some more info on this here
http://www.tengaston.plus.com/Megasquirt1.htm
I've added distributorless ignition since then which is well worth having!
Bit more here
http://www.triumphowners.com/registry.cgi?section=...

FYI this 2L Vitesse gets about 120bhp from an internally standard engine, returns a 35mpg general running average and 40mpg on long runs if not thrashed too much (rare!)

You should also look at this blog which has some excellent information on converting using the PI manifold route
http://www.club.triumph.org.uk/cgi-bin/blogs/blogv...

Hope this helps

Cheers

Nick

Edited by VitesseEFI on Friday 23 July 21:41

Edited by VitesseEFI on Friday 23 July 21:42

[Wedg1e]

By bizarre coincidence I was contemplating some spare throttle bodies I have from a Honda ST1300, which is a 1260cc V4 making about 115bhp.
Each pair of TBs is cast as one block and two pairs are bolted together back-to-back to make the V4 configuration. The TBs are 40mm upstream of the butterfly tapering down to about 36mm downstream and on 92mm centres. Each TB has an injector fitted into it.
Obviously you'd need two ST13 assemblies from which to strip 3 pairs - I've seen full assemblies go for less than £50 on Ebay, let's face it there's not much to go wrong.
The chokes are thermostatic as standard but I guess you could convert to a cable.

So now you know