citroen ax engine upgrade
Discussion
Bit of an odd one really, seeing as the easiest and most effective way to make an AX go quickly is to bolt a Saxo VTS engine into it. By carrying out the mods you've listed, I can't see you having much impact TBH.
Don't forget too that the 106 XSi lump has an iron block to cope with the extra stresses and strains of the higher compression ratio.
With the head you'll have problems with ignition, being that the 106 one won't have anywhere to mount the distributor as they use a distributorless coil pack setup, so you'd need to hook up one of these and find a way to run it. It's do able, but not much more than pointless IMO.
If you want to make the 1400cc unit potent, lairy cam with uprated valve springs, ported/skimmed head, twin 40 carbs, decent 4-2-1 manifold and exhaust setup and then go round the car throwing away everything you don't need. You don't need a heater in an AX GT....weighs far too much!
Don't forget too that the 106 XSi lump has an iron block to cope with the extra stresses and strains of the higher compression ratio.
With the head you'll have problems with ignition, being that the 106 one won't have anywhere to mount the distributor as they use a distributorless coil pack setup, so you'd need to hook up one of these and find a way to run it. It's do able, but not much more than pointless IMO.
If you want to make the 1400cc unit potent, lairy cam with uprated valve springs, ported/skimmed head, twin 40 carbs, decent 4-2-1 manifold and exhaust setup and then go round the car throwing away everything you don't need. You don't need a heater in an AX GT....weighs far too much!
well thanks guys for the imfo. i bought the saxo head as an other site suggested it , so in brief i will scrap the 1.6 head and try and find a 106 xsi or ax gti head or even a 106 rally head , i got the xsi pistons for the higher comp ratio needed for the larger compression chamber in the 1,6 head . ihave read the 106 xsi or
106 rallye head is far better flowing than the tiny valved ax head
in principle i am trying to build a 1.4 engine for auto cross regs a 1.6 engine puts me in with serious stuff , i ran my fully trimmed ax road driven car to 3rd in class in the brittish champ .on my 1st attempt this yr and need to find about 1- 2 sec a lap to win against the stripped other cars in my class , who are the tu engine tunners to contact any one know? thanks in advance
106 rallye head is far better flowing than the tiny valved ax head
in principle i am trying to build a 1.4 engine for auto cross regs a 1.6 engine puts me in with serious stuff , i ran my fully trimmed ax road driven car to 3rd in class in the brittish champ .on my 1st attempt this yr and need to find about 1- 2 sec a lap to win against the stripped other cars in my class , who are the tu engine tunners to contact any one know? thanks in advance
FYI....series 1 106 Rallye uses the same head as the XSi and AX GTi. It's only the carb-fed models like the GT which use piddly little valves.
Also, by using the AX head you've still got no advantage. The AX GTi/106 XSi head is the same as the early blacktop Saxo VTR ones, and the later silvertop differ as they use roller-rockers.
The AX GTi/106 XSi used a coil pack with no distributor, just like the Saxo. You'll still need to find a way to get it all to ignite.
If you have to keep it 1400cc and you don't want to run some sort of ECU system for the igntion you're stuck with the AX GT head. You can work them quite well though, and with a lairy cam and carbs you won't be far off the mark. Not sure how much of an advantage the pistons will offer, but if setup correctly they should offer some improvement. Not sure how much, and some of the gain you may end up with may just be because I'm assuming you'll hone the liners and fit new piston rings at the same time for good measure.
Either that, or get an AX GTi/106 XSi/Rallye engine/loom/ECU etc. Weighs more though, the alloy block was only used in the 1.3 106 rallye of that trio.
Also, by using the AX head you've still got no advantage. The AX GTi/106 XSi head is the same as the early blacktop Saxo VTR ones, and the later silvertop differ as they use roller-rockers.
The AX GTi/106 XSi used a coil pack with no distributor, just like the Saxo. You'll still need to find a way to get it all to ignite.
If you have to keep it 1400cc and you don't want to run some sort of ECU system for the igntion you're stuck with the AX GT head. You can work them quite well though, and with a lairy cam and carbs you won't be far off the mark. Not sure how much of an advantage the pistons will offer, but if setup correctly they should offer some improvement. Not sure how much, and some of the gain you may end up with may just be because I'm assuming you'll hone the liners and fit new piston rings at the same time for good measure.
Either that, or get an AX GTi/106 XSi/Rallye engine/loom/ECU etc. Weighs more though, the alloy block was only used in the 1.3 106 rallye of that trio.
G0ldfysh said:
L.A.D claimed to get 125bhp out of the AX GT 1.4. Think it was with running fairly lairy cams.
LAD do have a reputation for talking out of their arse.For the hassle of totally rebuilding an engine (which would have to happed to fit the pistons) and the gains given you're not even running electronic ignition it's far, far cheaper £/bhp to just drop a vts lump in, it's not like they're rare or even that expensive.
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