Here is a power graph of my sei 1242mpi turbo nothing special just a bit of fun it runs a quarter mile in 15.5471seconds 60ft in 2.4682sec a terminal speed of 90.01 mph all opinions most welcome will post a crapy rolling road graph once i get 5posts lol

Look forward to seeing the graph (and maybe some pics).

In the meantime (and to get your posts up), tell us a bit more about it. How much boost does it run, what engine management, etc.

EDIT: beat me to it

Right well its a standard punto 75engine with 16v pistons nothing balanced standard fly wheel 6speed box gt2 coupe turbo wheels (16s) it was running 11psi (0.7bar?) but it loves having 20psi on a standard head gasket! Standard 75management

There is a picture of the car in newby forum

http://i218.photobucket.com/albums/cc197/Sei160/powergraph.jpg its a pity that the torque curve is not over the power curve, at the time it was only place i could use for a printout 3months ago

http://i218.photobucket.com/albums/cc197/Sei160/thumbdisplayphp.jpg right here it is its far from tidy! Front is butchered rear has a dint but got a new tail gate just need front and rear sei sporting bumpers in silver if anyone knows of any many thanks

16's probably slow you down a fair bit what are you using to control the on boost fueling then? didnt think the 75 ecu was programmable for it?

Yeah the 16s are a bit heavyer and are not worth the head ache stick to 15s. Yes the punto75 ecu can be mapped i do have a chip for the N/A but im using the standard map. it has on detonation throughout the rev range fueling on boost is the tricky part not perfected as yet but will keep you all posted, to be fair it makes more sense using spi inlet manifold and head lot less head ache miles better bottom end torque imo the manifold is better for having am extra injector the mpi inlet manifold is not designed to have a injector above the T/B which leads to unevan fuel distribution or summat. An after market management system will be coming at a later date. Once i decide on how to go about the rebuild

Well so far the plan is to have compression ratio just below 7.5-1 for safety and if i cant get 99ron fuel, rebuild entire engine with new bearing big ends shells seals etc fully balanced bottom end standard fly wheel polished valves with cut valve guides clean up inlet and exhaust ports not having the ports any bigger, free flow quiet exhaust standard 75cam standard inlet and T/B, need! to add the oil cooler that i have, more efficient ic im using a punto gt at moment and dont want one that is visible, ally rad and depending on funds something like a gt25 ball bearing turbo most will say the turbo will be too big which it prob is. Is there anything els i should do? As for the management thats not a problem. 5speed box. I my honest opinion it is also not worth messing about with the 75management say if i had it mapped regardless how good the map is it will never be as good as a stand alone management system for such a set up it will work out cheaper and more effective with greater control over the whole thing and have the rev limit set as high as one wants

go for the 200mm flywheel You'll be pee'd off when you rebuild the engine with a 180mm flywheel then it slips

Slosei said:

to be fair it makes more sense using spi inlet manifold and head lot less head ache miles better bottom end torque imo the manifold is better for having am extra injector the mpi inlet manifold is not designed to have a injector above the T/B which leads to unevan fuel distribution or summat

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that doesn't make much sense. the 75 head has bigger inlet ports for starters.
correct about it pooling fuel if you tried to use an SPI kind of setup on it. but if you have an MPI setup already then you'd be a fool to use an injector up there. just use bigger injectors in place of the 4 that are already there.

What I don't get is what's actually controlling the 5th injector?

i'm lost too.

what's controlling it all mate??

Im not using a 5th injector. larger injectors yes, they were astra vxr! Injectors a punto75 fuel pump when it was put on the rollers different map sensor thats it honest lol but i have changed injectors and fuel pump to try get it to fuel better for when im running more boost, with the old set up it was running tooooooo rich on idle but great for driving on the road didnt feel any flat spots and it ran cool as james brown lol but after 1bar of boost it started to lean off but it was quick evan with the piston rings dead with it running too rich on idle(bore wash) whilst its been off road i have changed injectors once again think its 4th set now and last night a brand new fuel pump, the pump is good for a turbo car up to6bar fuel pressure and 300hp as easy as it sounds its not worth the grief tbh i have two punto75 ecus and it runs differently with both if you lot felt confused imagine how confused my management system is. pointless me saying i know how to do it when its always got a problem somewhere hence why i say stick to sqi. Really with which ever way ya go to turbo a fire engine cento going past true 120bhp you must upgrade the whole drive train and make sure the engine stays in the car lol yes the 75 heads sorts are slightly bigger dont know about valves though. 120bhp on a spi is easyly possible read about a few on here and another forum. I didnt say how it was due to simple fact if someone tried it and it went wrong i would be blamed. I also read here that lot if not all cento cant drive at 70mph on motorways? Which throttle body are you all using? I dont suffer any problems on the motorway

Just to add besides couple of times the head gasket has gone or car has over heated cos of radiator leaking excessing engine rocking with new mounts the garrett t2 sits pretty close to the radiator im on my forth radiator im using the mk1 punto diesel radiator its miles better but its huge! And couple of more bodg shots lol Here is the difference http://i218.photobucket.com/albums/cc197/Sei160/Enginenturbo.jpg
http://i218.photobucket.com/albums/cc197/Sei160/Front.jpg
http://i218.photobucket.com/albums/cc197/Sei160/Rads.jpg

so all you've done is change the MAP sensor and the injectors, but not actually remap the ECU? I can see how it works, and am impressed that it's coping.

I really would suggest binning the stock ECU and fitting something aftermarket though. If you are looking back at SPI, remember that you're going to need a bigger injector than standard - and the more fuel an injector can flow, then the smallest amount it can inject also increases. If you're having issues with it rich at idle now, it will be ten times worse with one big fat injector!

My Cinquecento is a 1242 MPI (turbo is on the way). I run a megasquirt ECU, which also includes a boost controller. It should make setting boost levels, and controlling on boost fueling / ignition timing easier.

The punto 75 head def has bigger ports, and the inlet valves are 0.5mm bigger than the punto60 engine (unless its a 176.b4 engine)

It is encouraging to see the power outputs, my target BHP is around 120 - i might have a slightly smaller turbo, but i have had a bit of headwork done to.

Whats the thing about 70 on the motorway? You may have read somewhere of someone being daft saying they don't do over 70mph because thats the speedlimit

Slosei said:

I also read here that lot if not all cento cant drive at 70mph on motorways? Which throttle body are you all using? I dont suffer any problems on the motorway

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I dont think anybody has any problems on the motorway if there cars running right.

I did 80/85 all the way back from stanford the other week. no probs

I will try find it where it said about motor way thing. And i dont have any probs with slipping clutch uprated clutch on standard fly wheel didnt slip with 20psi. Anyone using a alloy radiator?

I drove my turbo Cinq to Glasgow and back from Bournemouth, 475miles each way and I didn't hold back. Never had an issue sin Emmas either running on motorways, but and this is a big but when we ran with no oil cooler but an oil temp gauge the temps reached on only a 14mile motorway trip were very high, like 130degrees high, with cooler, never went above 100ish which is where you want it to be by using a thermostatic take off plate.

But by changing the MAP sensor to one that can read boost is fine as when going on boost the normal map sensor would have caused fuel cut, but the ECU still can't interpolate that information to know when boost is on and when it is not, hence why your car runs very rich off boost and runs lean at higher RPM and boost, or am I missing something?

I echo Arc's sentiments in that running this way you are not getting the best from your engine or have introduced any safety margins in there.

I would as an absolute minimum run at least a piggy back controller that can adjust the fueling for boost something like a Dastek UniChip so standard ECU can control the other stuff and then you can have it controlling off boost fueling and the UniCHip increasing fueling when needed, though standalone is the best way to go to control everything.

And defo fit a 200mm flywheel and clutch from a Stilo 1.4 16V (or other Fiats with same) as we found that once you reach a true 110lb ft the 180mm flywheel/clutch even uprated ones can't cope. in fact Alex (ghost) also found this out after he got hissing running correctly, the standard clutch is just a bit on small side.