engine options for herald based miglia

[1iTim]

Hey just a thought guys, with all the upgrading wheel sizes that i've read going on, how are you calibrating the mech speedo on the heralds? I've searched the site but cannot find much on the triumph speedo fixes. Thanks for the engine number info too. (5 weeks to go until i collect my donor!!)

[Mister Towed]

Originally Posted by 1iTim

Hey just a thought guys, with all the upgrading wheel sizes that i've read going on, how are you calibrating the mech speedo on the heralds? I've searched the site but cannot find much on the triumph speedo fixes. Thanks for the engine number info too. (5 weeks to go until i collect my donor!!)

Try using this tyre size calculator, up to about a 10% increase in rolling diameter will just take out the typical under read that manufacturers build in to make sure their cars don't break the speed limit -

http://www.kouki.co.uk/utilities/vis...ize-calculator

When changing away from standard diffs, matching the speedo and differential helps. I fitted a 3.27:1 GT6 diff, and then sourced a non overdrive GT6 speedo to match (there's a web site somewhere that deciphers the codes on the front of the Triumph speedos). That way I ended up with a very accurate speedo - when it said 100mph on the dyno that's what the dyno said the wheels were doing.

Phil J has taken a slightly different approach, his Spitfire diff and Vitesse or Herald speedo don't match, so he's used a sat nav reading as a known speed and marked the face of the speedo with a marker pen accordingly. Before that, with the speedo reading 55mph he was actually going about 80...

Anyway, good luck getting some means of measuring speed sorted, but it's not rocket science

[micky1mo]

Fittted that BMW 1.8i + gearbox into a 1968 Herald

Even managed to link a photo

http://i1329.photobucket.com/albums/...ps9e5f2afe.jpg

[Mister Towed]

That looks very neat.

How did you manage the details, like the gearbox to prop shaft/differential connection, electrics/ecu, high pressure fuel system with tank return for the injection etc etc?

[micky1mo]

Originally Posted by Mister Towed

That looks very neat.

How did you manage the details, like the gearbox to prop shaft/differential connection, electrics/ecu, high pressure fuel system with tank return for the injection etc etc?

We firstly had the engine running on the deck, so we sorted out most the details before fitting the engine such as the loom, remote fuel pump ect.
A fuel tank is yet to be "found" and fitted, but looking at a VW beetle tank
Used the gearbox UJ from the BMW fitted the Herald prop shaft via a machined collar, thanks PJO engineering
Still waiting on a replacement oil sump.

The next real problem is the exhaust down pipe as there not a lot of room between the engine and chassis rail, I might have to use flexi pipe

The diff is standard but what else is there ?

The bonnet will end up with a very large "power" bulge