Ford Fiesta ST
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#561874 - 16/05/17 06:04 PM Re: Fabricated Inlet Manifold - Group Buy [Re: _Jimmy_]
pyle Offline
n00b

Registered: 04/09/16
Posts: 32
The Cosworth inlet's design is superb. The one thing allowed to affect the power curve is the cam timing. If one doesn't like the curves just alter the timing for high rpm or mid range. The exhaust and the inlet has to have as much flow as possible. These runners are too long and will make the car slower. The Peugeot 306 has an inlet of similar design to the Cosworth and if someone is going to design an aftermarket inlet take a look at that.

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#561882 - 17/05/17 04:17 PM Re: Fabricated Inlet Manifold - Group Buy [Re: _Jimmy_]
_Jimmy_ Offline
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Registered: 11/02/14
Posts: 1143
Loc: Northwest
For high rpm you want short runners whereas the length of these was tuned to give peak torque around 5k rpm... for comparison it's a similar runner length to the Mountune inlet. As a result it plateaus at the top end giving a lower peak power, but gives bigger gains in the mid range that you use most of the time. This is always going to be the compromise with runner length tuning. We could have asked for shorter runners (it's custom after all) but that's not what was wanted.

The Cosworth is well designed for certain applications but the runners are much shorter so are optimized for high rpm (or forced induction), but how long do you spend up in that range in a road car? It was also designed for a 2.3 duratec, not 2.0.

Doesn't matter at this point as the group buy is done so those who wanted one are getting what we wanted, but the torque figures speak for themselves (Red is FF, blue is cossie)... more power until 6k rpm, but if you want a larger peak power figure get the Cosworth or Pumaspeed.


Not long to go...
_________________________
2005 Fiesta ST
Milltek non-res, Newman fast road cams, custom inlet manifold

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#562092 - 10/08/17 10:20 PM Re: Fabricated Inlet Manifold - Group Buy [Re: _Jimmy_]
RallyLAD Offline
n00b

Registered: 06/09/16
Posts: 9
Loc: Denmark
So how are they performing on the different set-ups?
I didn't get a chance to take part in the group buy, but I'm
still thinking about buying one.

So let's see those dyno sheets and spec lists :-D

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#562093 - 11/08/17 08:31 AM Re: Fabricated Inlet Manifold - Group Buy [Re: RallyLAD]
_Jimmy_ Offline
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Registered: 11/02/14
Posts: 1143
Loc: Northwest
Originally Posted By: RallyLAD
So how are they performing on the different set-ups?
I didn't get a chance to take part in the group buy, but I'm
still thinking about buying one.

So let's see those dyno sheets and spec lists :-D


There's a guy selling his ST who hasn't fitted the inlet yet, so he's looking to sell it - I can put you in touch. FusionFabs can also make them to order individually now as they have made jigs.

The production inlets have slightly shorter runners than the prototype and better porting into the flange so have better top end.

There's two graphs from people so far but photobucket has eaten them, I'll ask for them to be put up again. Both were dynoed at Dreamscience and both running Newman ph2 cams (I'm pretty sure) and 60mm TB and a tweaked hyper R map. The first is running a RamAir filter behind the headlight, custom sport cat and Mountune catback, the second has a K+N directly on the TB (like mine is), plus decat with Milltek resonated cat back.
car 1. 190bhp @????rpm / 190lb.ft(257Nm) @????rpm
car 2. 205bhp @7000rpm / 180lb.ft(244Nm) @5000rpm

Here's the second one in blue compared against an MR200 in red (wasn't on the same dyno unfortunately), I know it's not the original plot but it's all I have at the moment with the others hidden by photobucket until I can retrieve them. I'll put my graph up once I get it done.


I recently fitted mine, getting it mapped today at DS and dynoed if the machine is available.
It feels a lot more urgent when you get on the throttle low down compared to just cams. Makes a great sound too, similar to how the MR200 growls.
_________________________
2005 Fiesta ST
Milltek non-res, Newman fast road cams, custom inlet manifold

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#562094 - 11/08/17 03:26 PM Re: Fabricated Inlet Manifold - Group Buy [Re: _Jimmy_]
RallyLAD Offline
n00b

Registered: 06/09/16
Posts: 9
Loc: Denmark
Looking good!
Is this still on the 2 litre?

Yes please, I'd like the sellers info. I have been in contact with
FF but I don't mind buying second hand.

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#562096 - 11/08/17 05:04 PM Re: Fabricated Inlet Manifold - Group Buy [Re: _Jimmy_]
YellowBadge Offline
MountooningTipster

Registered: 26/08/07
Posts: 11249
Loc: here
good work on this project performance looks good.
_________________________

MR200 Stage 3 200PS
Evans Halshaw
Mountune Pro

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#562108 - 13/08/17 10:35 PM Re: Fabricated Inlet Manifold - Group Buy [Re: _Jimmy_]
kenny Offline



Registered: 08/03/08
Posts: 11570
Loc: essex
Does look good

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