Will Pedley Racing – Focus ST170 ITB conversion

Quick update…

We FINALLY got the ECU and wiring loom on Friday after an 8 week wait!

I was away for Time Attack at the weekend, so yesterday I made a start with the refit 🙂

One thing that I realised whilst away at the weekend is that the ST170 uses vacuum on the brake booster, the throttle bodies don’t have the facility to ‘take off’ for any engine vacuum – so…

Very carefully drilled and tapped the underside of the inlet manifold and created a balanced vacuum source:

Then it was time to run a fuel return line (as the ST170s don’t have one…) it’s a bit long at the moment but will trim down later!

Drilled a rather large hole in the bulkhead:

And siliconed a grommet in place to run the new engine loom through:

Then it was time to fit the new clutch slave cylinder:

And the new lightweight flywheel and clutch:

Then the two long lost friends were reunited 😀

A quick check confirmed my fears that the trumpets were too long, however, I have a cunning plan – just need to speak to Adam first to make sure he’s happy with it…

Never know, tomorrow might see a fire up 😉

Published by Adam Arnold

Adam Arnold is a 20(ish), father & founder of the Smarter Group; a member of CTVF500; Entrepreneur in Residence @ Wolves Uni; SPEED+ Mentor & an #sbs winner.

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  1. Brill write up, fantastic even, so glad that this has been looked at before I venture down this road,

  2. Hi Jonathan,

    Glad you like it – I’ve merely borrowed the content from Will Pedley a means of showing the importance of Search Engine Optimisation – although it is my car!

    If you’re looking to do something like this I would say without hesitation to give him a shout http://www.willpedleyracing.co.uk 🙂

    From your e-mail (which isn’t shown to the masses) can I assume you have a Fiesta? I can only imagine how quick a smaller car would be with this engine :0)


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