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Felicia 1.4-16v engine transplant

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  • Author

Yeah ice been churning out 130bhp through my bog standard 1300mpi skoda box for a while now, and I don't tickle it either... I give it beans :rofl: and it appears to be holding up pretty strong, I'd even go so far as to say it's actually better then a vw 085 gearbox from a polo

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  • felicia 1.6 belhouse adaptor plate goes on first

  • Ok so i thought id have a blast at this conversion and started it the other week, i think the main issue has been lack of space as im doing it in a single garage! So far it hasnt actually been too ba

  • Thanks , hopefully have it together sunday

The gearbox is the thing that's surprised me most about this build frankly. Wonder what the feel is like compared to the Polos box. . .

Mine's on it's 2nd VW one now, and that's spewing oil. :thumbdown: Might have to swap it out for the Felica unit. :D

In all seriousness though, is the Felica one shorter geared than the Polo? (3,000 rpm @ 60, so 20mph per 1,000rpm in fifth)

Depends which box and tyres for final gearing obviously. The diesel box on 195/65/15 tyres gives 100mph(gps) at 4k (std diesel rev counter) and 3k is 70.(trackday)

The speedos are usually way optimistic.

The fun says 2.8k at 70 on its std wheels but it lies and its yet to be corrected.

Not sure how the 1.4 will respond to the 1.6 gearing, should know shortly

Edited by rolo

Depends which box and tyres for final gearing obviously. The diesel box on 195/65/15 tyres gives 100mph(gps) at 4k (std diesel rev counter) and 3k is 70.(trackday)

The speedos are usually way optimistic.

The fun says 2.8k at 70 on its std wheels but it lies and its yet to be corrected.

Not sure how the 1.4 will respond to the 1.6 gearing, should know shortly

Rolo, you probably know this, bit it may help someone.

You need the following:-

1) An assistant who can count to 16, and write in a moving car.

2) A stopwatch, or analogue watch with a sweep seconds hand.

3) A road-legal car,

4) Access to a quiet motorway. (for values of quiet that will allow you to maintain a steady indicated road speed for 2 to 3 minutes at a time).

5) A calculating device, or the ability to do long division.

Drive down the M/way at an indicated steady speed, and have your "lovely" assistant note your speed and engine revs. Now have them time how long it takes to pass 16 of the posts by the roadside. This gives you your speed in seconds per mile. 3600 / secs_per_mile will give actual miles per hour.

  • 2 weeks later...

Just tried to sync the 16v ecu with lite and a blue lead, no result. Tried a solus that would do the throttle adapt but thats all. Do I need the registered process or the full job? Polo loom needs shortening too, 8v ecu smiling at me now and the 30k aee round the corner.

  • Author

Yes you do need the registered version to be able to use channel 0 in the adaption section of the immo unit.

Should have used the aee felicia loom rolo, it's far easier, if you have no luck you could post me your ecu, immo unit and ignition key and I'll match them up for you and send them back.

Yes you do need the registered version to be able to use channel 0 in the adaption section of the immo unit.

Should have used the aee felicia loom rolo, it's far easier, if you have no luck you could post me your ecu, immo unit and ignition key and I'll match them up for you and send them back.

Thanks for that, a nights sleep let me decide to use the aee loom. Its just that the polo loom looks so much better. As well as the shortening there`s quite a few external connections needed, lessening its appearance and can`t find a rad fan connection so its history.

If I get the registered or full version of vc is there any good tutorial stuff available?

edit just found the ross-tech manual.

Edited by rolo

How does the rad fan work? Do you need to substitute the ecu switching the relay on the felly with a temp switch, as there is no such connection recorded on the polo ecu. Or is it present and become active when confronted with the felicia wiring.

Its the yellow wire from pin 33---no such connection on the polo.

Also the temp sensor wiring is different. Does this correct the anomally?

Or am I looking for complications when the whole thing just works?

ECU doesn't switch it on the Felicia, it's done by a switch in the radiator.

  • Author

Ok roll, tell mw what you've done from the top :thumbup: I'm getting confused with all the different talk about polo looms etc.

got engine, made mounting, new clutch, belt kit,waterpump; sort loom time-- as you say felly loom looks easier but looking at managment diags on both there are some differences plus the need to splice 6/7 connections externally into the polo loom and its much too long.Fair enough use the felly loom and polo ecu.

Pin 33 on felicia loom connection goes to the the coolant blower relay. There is no such connection on the polo ecu.

Also it appears that the temp sensor is wired into a low voltage digital circuit on the felicia loom and a 12v one on the polo.

Source is from autodata management loom circuits.

Before fitting the felly loom I need to check these out.

  • Author

Autodata are completely wrong, neither the felicia or the polo have a relay for the radiator fan.

The only extra thing an aee engine in a polo has over the the felicia is a pair of wires which go the the power steering pressure switch, the felicia doesn't have this and you could ignore these,

The only extra sensor that the afh engine has over the aee engine is the addition of an egr valve solenoid, one pin comes from the fuel pump relay live, the other is to the ecu, again you could ignore this wire

The polo ecus have a few additional pins relating to aircon as well but you can ignore these

The pin out for the aee and afh is identical, it's the same ecu with different software mapping on it.

What I did with mine is use a bog standard felicia loom from a 1.6, untaped the throttle body wires, moved it across and re taped it, it's a simple plug and play job, I then also added the 2 extra wires for the egr valve..

If you get really stuck I have a loom here that I made up as a spare with all the necessary already done and it's tested working too.

No problem making a loom, done bike ones and a couple of stand alone tdi`s using autodata for help. Obviously need to check conflicting info. That`s why I asked. Thanks for input.

Edited by rolo

  • Author

when i get home i'll upload some wiring schematics for your rolo.. i've got a complete set of the official vw group diagrams for a felicia and polo ones which covers it all in great detail and might help you out a bit

Tom, just got chance to look at pickup instead of a book. Obviously there is no pin 33 connection so been labouring with false info.

Just to see if there was a consistent autodata mistake, checked the old diagnostic pin data (1999) I used to use. No mention of blower rely connection.

BUT

It lists the AFH polo, AEE Polo, and AEE GOLF/VENTO as being wired, pinned and connected identically but 5 completely different occurances for aee caddy pickup. Ahhhhhhhhhhhhhhhhh!

Edited by rolo

  • 2 weeks later...

Auto data wrong on all counts it seems.Been waiting now for over 3 weeks now for the ellusive rear timing belt cover.

  • Author

I waited 6 weeks rolo, then I went and stood on it :smirk:

  • 1 month later...

Hi, mate!

I'm already running modified 136 engine with around 90hp and for the next year I'm looking for few more hps.

I spended last few days reading and writing down notes about all your conversions and I have few important questions.

The AFH conversion is definitely the easiest of all, instead of your AVY@AFH conversion.

So about the AVY@AFH conversion..

If I see good, you used the AFH head because of that you couldn't get there original spark distributor like that one from AEE engine, not anything else? So if I can get the original AVY electricity with it's inductor working, it's not necessary to use the AFH head? Electricity doesn't make any problems for me.

From all that I've read I made one (good or bad?) idea.

What about using AFH engine and give in the AEE crankshaft with AEE piston-rods and AFH pistons to get more HPs?

I think it could be very easy and powerfull conversion if it's possible.

Or what about using the fabia's ABU (1.4 16V 74kW) engine with AEE crankshaft, piston-rods and ABU pistons? It has the same catalogue number of engine block like the AFH in ETKA, so I think it's the same engine with modern induction coil and newer head with two timing belts on it (like AVY) and few more (small) modifications. I'm looking forward to use ABU engine because of it's price here in slovakia.

Maybe I will take a look at one during the weekend so I will be wiser.

Cannot you send me the cad files of the engine mount for the AFH?

Thank you for your time and many many photos you made :) .

Greetings from Slovakia.

Sorry for my english.

  • Author

Hello your english is ok,

Ok, the aee engines block is 9mm taller than the 16v ones (afh, avy, ahw, Abu, ark) and pretty much all of them.. The aee crankshaft will fit into the 1.4 engine block as a straight fit but there is a mismatch in the length of the connecting rods and pistons due to the different block height and the 1.6 pistons have a different compression height. So if you use the afh pistons with an aee crank they will stick out of the top of the block by about 6mm at tdc. You cannot easily use an aee block because it's taller so the timing belt wont fit and a mounting hole for the belt idle pulley is no there on the 1.6 8v blocks.

The problem with the avy and arc engines is the variable valve timing gear on it, they can only really work successfully with the original ecu from that engine...

It is possible to use a aee distributor on the later engines like afk ( roller rocker heads like in the fabia) you just take off the end mounting plate that holds the coil pack and there is a pin drive for the distributor on the end of the camshaft, but you would need to fit a smaller pin to the distributor drive gear or drill the drive hole to a larger size.

Afh and aee engine both use the same distributor

You cannot remove the crankshaft from the 1.4 16v 100bhp engines (fabia, lupo, polo etc) with the aluminium engine block without damaging the main crankshaft webs, you need to get them line bored to re-use them.

So in essence if you want to make it a 1.6 16v you need to use the pistons from a 1.6 16v engine, I don't know about in Slovakia, but on uk spec vehicles some of the mk4 golf/bora have a 1.6 16v engine fitted with atn or aus engine codes plus a few others which I can't remember at this time of night

why didn't you just use the 16v ecu Tom? it doesn't look like it would take much wiring and should talk to the skoda immob box?

  • Author

why didn't you just use the 16v ecu Tom? it doesn't look like it would take much wiring and should talk to the skoda immob box?

:wonder:

thats exactly what i did do with mine, however if you wanted to use the ecu from avy engine it would be a completely different story...they use a different version of the kwp protocol and cant be matchd up the the siemens immo boxes in a felicia.. there is another way round it but its all circumstantial anyway :yes:

thank you for your response..

so, as I see, as first I will build the AFH engine, drive it and for the next year I will fit there carbs from honda cbr600 to have some fun with it

and 1.6 16v will stay in my dreams for some time, because AVY engine is totally rare here in Slovakia :)

thank you for your research!

Done the 1.4 and looking at the 1.6. Should the need arise can I, then, fit 1.6 (none aee, 16v) crank, rods and pistons into the afh?

Edited by rolo

  • Author

Done the 1.4 and looking at the 1.6. Should the need arise can I, then, fit 1.6 (none aee, 16v) crank, rods and pistons into the afh?

Have you got any pics rolo ? Yes you can fit a 1.6 16v crank into the afh block along with it's pistons and rods, if i was going to build another one this would be the way I would do it tbh, it saves a lot of faffing around with head bolts and the stud for the timing belt idler etc... BUT this only applies to the later afh blocks.. The real early ones used a chain driven oil pump, but then you could just use a crankshaft from a really early aee 1.6 with the chain driven oil pump instead.

TeflonTom: Can you send me cad files of the afh engine mount which you made? If itsn't secret..

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