Difference between hfx and kfx/kfw engine

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fleyh
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Joined: 22 May 2020, 10:43

Difference between hfx and kfx/kfw engine

Post by fleyh »

Hello there,
as i was not able to find the information that i'm looking for elsewhere in the web, i thought i'd register here for this forum seems to be a knowledgeable source.

So i got an '04 Citroen C3 1.1 with the hfx engine, as i'm in the process of refreshing the car a bit, i looked into parts numbers of the engine assembly out of interest and found, that the hfx and kfx share the cylinder head with the same valve sizes, same size throttle body, the air filter is obviously the same.
The clear difference is the engine's capacity.
I'm now wondering if there is a difference in these engines intake manifolds and camshafts, and if, if anybody could provide timing data on the camshafts.

I figured that, if the kfx cam has more lift and timing, one could get a bit of power out of a swap without giving up too much driveability in lower revs.

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GiveMeABreak
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Re: Difference between hfx and kfx/kfw engine

Post by GiveMeABreak »

There was no KFW, or KFX engines fitted to the C3 MK I for this year (2004).

As far as petrol engines go, there was the HFX (TU1JP: 1124 cc), the KFV (TU3JP: 1360cc) and the NFU (TU5JP4: 1587 cc) engines.

wheeler
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Re: Difference between hfx and kfx/kfw engine

Post by wheeler »

Just for reference, engine/gearbox types fitted to the mk1 C3. Cant get the columns to line up properly but you can get the idea.

Euro, Type, Model, Trans, CC, Fuel type, Engine type
III FCHFXB C3 1.1i M5 1124 P TU1JP
III FCHFXC/IF C3 1.1i M5 1124 P TU1JP
IV FCHFXC C3 1.1i M5 1124 P TU1JP
III FNHFXB C3 1.1i 4 seats M5 1124 P TU1JP
III FCKFVB C3 1.4i M5 1360 P TU3JP
III FCKFVC/IF C3 1.4i M5 1360 P TU3JP
IV FCKFVC C3 1.4i M5 1360 P TU3JP
III FCKFVE C3 1.4i A4 1360 P TU3JP
III FCKFVE C3 1.4i A4 1360 P TU3JP
IV FCKFUC/P C3 1.4i 16v Sensodrive A5 1360 P ET3J4
IV FCKFUC/PS C3 1.4i 16v Stop and Start A5 1360 P ET3J4
III FNKFVB C3 1.4i 4 seats M5 1360 P TU3JP
III FCNFUB C3 1.6i 16v M5 1587 P TU5JP4
III FCNFUC/IF C3 1.6i 16v M5 1587 P TU5JP4
IV FCNFUC C3 1.6i 16v M5 1587 P TU5JP4
III FNNFUB C3 1.6i 16v 4 seats M5 1587 P TU5JP4
III FCNFUC/PIF C3 1.6i 16v Sensodrive A5 1587 P TU5JP4
IV FCNFUC/P C3 1.6i 16v Sensodrive A5 1587 P TU5JP4
IV FCNFUF C3 1.6i 16v A4 1587 P TU5JP4
IV FLNFUC C3 1.6i 16v VTR M5 1587 P TU5JP4
III FC8HXB C3 1.4 HDi M5 1398 D DV4TD
IV FC8HXC C3 1.4 HDi M5 1398 D DV4TD Euro 4
III FN8HXB C3 1.4 HDi 4 seats M5 1398 D DV4TD
III FC8HYB C3 1.4 HDi 16v M5 1398 D DV4TED4
III FN8HYB C3 1.4 HDi 16v 4 seats M5 1398 D DV4TED4
III FC8HXB C3 1.4 HDi M5 1398 D DV4TD
III FC8HZB C3 1.4 HDi M5 1398 D DV4TD
IV FC8HXC/P C3 1.4 HDi SensoDrive A5 1398 D DV4TD Euro 4
IV FC8HZC C3 1.4 HDi M5 1398 D DV4TD
IV FC9HXC C3 1.6HDi 16v M5 1560 D DV6
IV FL9HZC C3 1.6HDi 16v VTR M5 1560 D DV6TED4 FAP
III HBKFVB C3 Pluriel 1.4i M5 1360 P TU3JP
III HBKFVC/IF C3 Pluriel 1.4i M5 1360 P TU3JP IF EURO4
IV HBKFVC C3 Pluriel 1.4i M5 1360 P TU3JP
III HBNFUC/PIF C3 Pluriel 1.6 16v Sensodrive A5 1587 P TU5JP4 IF EURO4
IV HBNFUC/P C3 Pluriel 1.6 16v Sensodrive A5 1587 P TU5JP4
III HB8HXB C3 Pluriel 1.4 HDi M5 1398 D
IV HB8HZC C3 Pluriel 1.4 HDi M5 1398 D DV4TD

fleyh
Posts: 2
Joined: 22 May 2020, 10:43

Re: Difference between hfx and kfx/kfw engine

Post by fleyh »

GiveMeABreak wrote:
22 May 2020, 11:00
There was no KFW, or KFX engines fitted to the C3 MK I for this year (2004).

As far as petrol engines go, there was the HFX (TU1JP: 1124 cc), the KFV (TU3JP: 1360cc) and the NFU (TU5JP4: 1587 cc) engines.
So I've learned something. The info i found for the cylinder head similarities was for the Peugeot 206, which at one point in time had the kfx engine (i think). Since that engine has a similar power output to the 1.4 in the Citroen i assumed it's the same.

So there is still the question about camshaft differences between the HFX and KFX/KFV.