Citroen C1, Peugeot 107, 108 & Toyota Aygo Owners Club. (Discount code for CityBugStore: C1OC)

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PostPosted: Wed Oct 21, 2020 7:14 pm 
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Bunkey, Please have a read of the following i found out there. Would love to hear your opinion on what this owner did.

https://www.verboom.net/projects/c1/20131004/index.html

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PostPosted: Wed Oct 21, 2020 7:34 pm 
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Drives: 2011 C1 + VW Touareg
SlackGarry wrote:
Bunkey, Please have a read of the following i found out there. Would love to hear your opinion on what this owner did.

https://www.verboom.net/projects/c1/20131004/index.html


My observation, even before I got to read about the testing, was that the cat is far too far away from the engine and will never heat up enough to work properly, especially with bigger bore pipework which slows the exhausts gases down.

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PostPosted: Thu Oct 22, 2020 8:59 am 
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Location: Hexham
Drives: 2011 107
Yeah I've seen that before - It didn't work because the cat has to be hot to catalyse the gases properly. As the engine is such low output it has to sit right by the exhaust ports like the standard item to get the required energy for the C=O covalent bonds to break and form O-C-O molecules on the platinum element ie. Catalysing carbon monoxide into carbon dioxide.
50mm is also far too big a system as we've covered here. Honestly the people who put that exhaust together for the guy really should have known better.

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Last edited by Bunkey on Thu Oct 22, 2020 9:26 am, edited 1 time in total.

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PostPosted: Thu Oct 22, 2020 9:22 am 
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One of these days Garry I might be able to offer you a proper exhaust system and some other trick bits for these cars but I have a bit of personal growth and development to do before I can make those ideas a reality.

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PostPosted: Tue Oct 27, 2020 8:50 pm 
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Well I was all set to go with this and then a friend turned up asking me to troubleshoot a squeaking noise (read: broke down in my workshop) so I've been wrestling with a C2 clutch for the past few days...

Working on his Citroen, all I can say is I'm glad the first-gen bugs were a Daihatsu/Toyota led collaboration :lol:


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Och I don't mind really, the Fiesta's been in isolation for so long now I figured it'd better be socialised before it turns feral.

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PostPosted: Wed Oct 28, 2020 12:47 am 
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So I've done did some thinking, partly about how to raise a little more cash for this build and partly about my plans going forward with some of the work I do here...

I'd like to offer you guys my improved-OE spec ported manifold and throttle body to purchase.

(Not the actual one but the same spec!)


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The design is working well...

- It gives much better throttle response over the standard item as well as freeing up the top end to make the most of any potential gains elsewhere.
- It helps to smooth out engine running by ensuring the airflow is somewhat balanced across the 3 cylinders, where one might otherwise be disproportionately impeded or suffer from turbulence as a result of the random burrs created during the plastic molding process.
- It also aims to smooth out any hard steps which can induce irregularities in the torque curve at certain engine speeds.

Smooth and responsive are the key words here

There are no detrimental effects to emissions or MPG values and since the ICV remains untouched your car won't idle any differently.


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Port-matched & bladed throttle:

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Obviously the images here are of the first prototype so the finish shown is a little rougher than I'm aiming for.


The price for the manifold and throttle body combined is £80 on an exchange basis (ie. you send me your old one back), or £130 outright.
These parts have been port-matched together and thus are sold as a single unit.

I can offer this with a ported airbox too should you wish to retain the standard filtration system - though a high-flow Pipercross foam element or similar will be required to make it a worthwhile upgrade.


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I can also offer the bespoke induction system shown above, which has been extensively field-tested and yields better torque across the range than other big-name aftermarket kits.
This includes a Pipercross filter and all the custom shaped pipework to easily fit the standard or ported OE throttle body. The price for the induction system is £75.

Bellmouth-shaped intake at filter neck:

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Consider this offered as a beta-version product - The specification and it's pricing are subject to change with further development.
Given that I've been running the manifold for some 10k miles now, and the induction kit for some 80k+ miles in it's various forms, I'm happy to say I don't foresee any issues and look forward to gathering some useful feedback during this stage.

Please PM me if you're interested in this.
I'm happy to offer fitting at my workshop near Hexham, as well as any other high-quality servicing of these cars that you might need.

Thanks :thumbs:

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PostPosted: Wed Nov 11, 2020 5:45 pm 
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Think if you get the pricing right, The induction Kit will sell well on the FB page.

Good Luck

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PostPosted: Mon Nov 16, 2020 10:32 pm 
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Bunks, I'm interested in the manifold and a rear strut brace. I'd go further and suggest a second cross brace where the rear seats lock upright- taking the latches off and bolting the extra brace there. It's somewhere to locate harness belts.
Not a big fan of ANY induction system I've seen. I get inlet temps of 20+ even when ambient is low teens. It suggests moving the inlet out altogether and lagging the pipes.


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PostPosted: Mon Nov 16, 2020 10:55 pm 
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PostPosted: Mon Nov 16, 2020 10:59 pm 
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I've been busy AF. Production quality has been stepped up across the board. The induction system is first on the agenda. Bear with me.

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