Seicento Seicento 8V build

Holy smoke, what happened to the flywheel? Overtorqued the bolts or fatigue from vibration?

Hardcut limiter 9k rpm and they snapped

I mocked up the engine to measure clearances and to verify it will work so everything is disassembled again for decoration and storage.

















I also went inside my intake manifold again to match it better to my cylinder head - I'm afraid of removing more material although it would be good.







Eventually I will probably figure out an ITB setup again as I've bought a set from an R1 with a bit better spacing - but that's a long term idea and not important at the time.

Ordered a set of MTS Technik coilovers that arrived - really nice item I must say.



Also reworked the throttle body a bit.

Great engine build mate.
But you used BMW N54 springs and retainers on the stock seicento valves?

Grande punto valves 5mm stem.

Amazing project

hi, can you comment on the MTS coilovers? is it the sport version? i am thinking of getting them for my track seicento. i'm assuming it's not the best suspension in the world, but it would at least be a starting point for future upgrades and/or custom made suspension, since the spring rates are written on the website.
thanks!

Didn't drive it enough to have comments really - for now I don't like them for what I bough them for but they are comfortable.

It uses a 2kg tender spring that 's in action for most of the time until it compresses. After that the main spring rate takes over.

I will have more comments after I try them on the track. I believe I'll get the best out of them by trying different springs.

thanks for the reply. i guess i'll have to find out for myself. i am trying to decide between this or the KW V1, but it's difficult to find some actual info on the internet (or even onboard footage from some auto-slalom events or similar). i'm guessing KW should be somewhat better, but since the V1's are not really track focused they again might end up being too soft. and i'd like to get atleast some use out of the suspension before having to change the spring rates etc (since i'm not sure what values i am looking for anyway, and MTS seems to be the only manufacturer that actually provides some info about this)

You can try my car when I finish the setup.

A lot of changes happened as usual as my mind is quicker than my hands.

It ended up being a 72.5x84mm engine at 1387cc

T-JET bottom end with some plugs to take 8 valve head
Opel A14NET pistons milled to take T-JET rods
Rods T-JET bushed/honed to take Opel pins
Head base 1108 Seicento SPi ported
Valves 35.5mmx6mm intake and 28.5x5mm exhaust
Catcams springs
Custom retainers
Alquati DCNF manifold ported
Weber 44DCNF carburetors
Currently running on modified distributor
Cam at the moment same old Cat Cams giving me trouble with carburetion as I have a lot of overlap ( have two more cams to try)
Exhaust still old CBR1000RR modified to suit
Added oil filter relocation and Oil Cooler with thermostat
Steel flywheel with ARP bolts
and stuff

I rebuilt the box with new bearings and seals and put a longer final drive and shorter 5th gear ( Punto MK1 16V ELX) also hand sanded it to be flat so I can wash it properly vs the pitting on the casting.
Redone the complete suspension, brakes and stuff as well to get it ready for the track when there is a chance.

I can't remember what else I did but a lot of stuff I guess.

Carbs are staying as the manifold was a gift (rare to get those) and I also managed to find 44mm DCNF that is quite rare.

I love carburetors due to nostalgia and I had 40DCNF on my Fiat 128 when I was 18.

I need to upgrade ignition and suit the engine to the carbs to avoid reversion as I would also like to street drive it every once in a while.

At the moment it's not particularly streetable - who would guess.

Thanks for the update

Very nice engine. What do the plug block in the engine?
Maybe for the ignition, you could use a ford coilpack with ignition ecu

it’s an extra oil return that the 8v doesn’t have and would lose oil pressure from.

I had standalone ignition on marelli coils, there is no need to use ford coilpack.