Alfa Pages

[jimshady]

Afternoon gents, as the title states I have a 1.6 engine from a 145 I have retained the ancillaries such as injectors an throttle butterfly etc.

My question is would I be able to put the 1.6 lump in and still use the 1.4 electronics, both engines run with the Weber IAW system. I dont have the 145 ecu so was hoping the 33 electronics would just 'adjust' itself regarding increased fuel and air requirements from the 1.6?

Is this theory sound or am I barking up the wrong tree? I have a set of Dellorto carbs with the manifolds sitting there but since buying it I decided I would quite like to keep it original (aside from the extra 200cc that is!) as the Imola seems fairly rare.

Any Ideas?

[Joelomint]

not 100% positive, maybe others can confirm, but isn't the 1.4 also known as a 1.5 in different regions? ie its the same engine?

If that's the case then the ecu should be able to work it out.. i guess the thing to check is if the 1.6 lumps use the same capacity injectors, throttle bodies, fuel rail etc?

[jimshady]

As far as I can tell, the injectors are the same and the throttle butterfly is the same.
So as I was hoping, the ecu will adjust the fuelling accordingly (we think!)

[eagle3]

Is the original engine on the Imola no good?

Not sure it's worth the agro for an extra 13bhp.

Plenty of Imolas/Trofeos in France. And they were called either 1.3ie or 1.4ie. The 1.5ie is 1490cc.

I'm not sure the 1.6 block is as reliable as the 1.3.
_________________
Alfa33 QO 1984
Alfa33 1.3i.e. 1994

[Bellamachinna]

[ZeNiTh-PbArM]

Hi,

the 1.3/1.4 (1351) engine fitted to 33 and 145 was fitted with Weber Marelli fuel systems : IAW 8F.68 for 33 and IAW 8F.6B for 145. On german and greek markets 1.4 33s were fitted with a Bosch fuel system.

1.5 33s were fitted with Bosch system, early models with jetronic and later models with motronic (no AFM on motronic fuel system).
1.6 145s were fitted with Bosch fuel system or GM/Rochester fuel system.

I guess you'll find easier to get an ECU for your 1.6 engine than to adapt an IAW system. The best option woud still be to find a 1.3 engine from a 33, the extra cc is not worth the hassle.

Regards,
zp

[jimshady]

Ok, I think this one is put to bed. Many thanks for the info gents, I think I'll just run it through the summer as I planned and go the 16v on carbs route if I can get hold of the engine. I already have the carbs and manifolds, and an old 1.3 lump for the dizzy etc.

Was hoping to keep her original, but fxxk it we'll go for raw power instead!

[alfafan]

[jimshady]

I have the manifolds and carbs etc from my old 1.3 donor 33

[mg907]

I'd like to take advantage of this post for asking a question related to the argument: I've always been wondering if it is possible
to convert a EFI boxer engine, like the 1.3/1.6 ones mounted on the first series of 145/146, in a carb-dizzy one in order
to put it on a early 33/Sud.

I know for sure that the oil pump must be replaced because the support for the ignition distributor is required, but I still do not know if...

1) The hole for the distributor is present in the 145/146 engine rear block cover
2) It is possible to mount the carburetors intake manifolds on the heads


I suppose that it is still possible to maintain the original alternator, removing the power-assisted steering pump, if present
(and mounting a shorter belt)

Every advice will be really welcomed!

Mario

[Admin]

Hi

Not certain. I have a feeling the hole for the dizzy isn't directly usable. However there were also 33s fitted with an ignition system that didn't use a distributor.

All the best

Keith
_________________
I owe, I owe, its off to work we go.
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[mg907]

Thank you Keith,
unfortunately my 33 is equipped with distributor and electronic ignition while the last boxers actually have static coils in place of the dizzy.

My question was due to the fact that there are still some chances to find 145/146 engines from the breakers but previous
boxers are now really hard to find!

[jimshady]

[ZeNiTh-PbArM]

Hi,

You have to swap the engine rear block cover. While it is possible to adapt a dizzy, installing a fuel pump is not (the casting of the casing has to be drilled and milled).
Easier to do the swap. You need one new o-ring for the oil pressure way, and make sure you install the oil pump with the correct orientation.

regards,
zp

[Bobkelso]

Hi, some years ago my father did the inverse exchange,
he used a 1.3 block motor from a twin carb 33 as
complete spare for a 1.3 i.e. Imola 1991
(IAW ignition) with damaged block.
He was telling to me the only differences he noticed
(but in that case he didn't verify if oil pump were different
for the dizzy or not, as he simply removed the dizzy)
was a hole to close (I suppose is the one for the
mechanical fuel pump) and one to drill for a
different electronic sensor (may be one of the two sensors
for water temperature that are on the motor block??).
I don't know but I think he had also to swap the flywheel.

The motor worked very well for years without problems,
the exchange gave no issues.
In that case the resulting motor was so good that
after testing the car I had to verify the bore cylinder number
on the block, I had some doubt it was a 1.5 block, as wheels
were slipping on 2nd gear, but it seam the block was just a
'lucky' 1.3 (didn't know if it was running a little enriched
on fuel for some reason or previous owner's customization
of electronic part or if it was 'doped' with rebored cylinders).

Ps.: some one know if were are some differences
in valves' diameter, heads details, oil circuit, etc, between:

- 1.3 alfa 33 motor of 90-92
- 1.3 alfa 33 motor 93-94 (the very last series)
- 1.3 alfa 145 motor 94 ??

or between:
-1.7 alfa 33 8v motor of 90-92
-1.7 alfa 33 8v motor of 93-94?
-1.6 alfa 145 motor 94 ??

(for example I read somewhere oil circuit was better
in last boxers, with oil jets to cool pistons from below,
or valves had liquid sodium inner cooling?
but I don't know details and from what series..)
_________________
Alfa 33

[Bellamachinna]

[Bobkelso]

Hi, I was trying today to verify this and other details on manuals
and Eper (spare's Fiat program), it seem that (not sure):

- work manual of alfa 145-146 1994 boxer says 1.3 and 1.6
have oil jets installed on the front and centre main bearing
caps to cool right pistons and it put some images,
I don't know if is an error of confusion with 1.7 16v,
so they are not present, or if they can be present also
on later 33 boxer 8v..

- it says also they have exaust valves with chromium-plated
stem ans liquid sodium filled, but this seem to be an error,
as Eper (Fiat) code for exaust valves is the same for
all alfa33 90-94 and alfa 145..
..or could exaust valves of every 33 90-94 be sodium filled??
(I ask as they cost twice the aspiration valves)

- alfa 33 90-94 1.3/1.5/1.7 and 145 1.3/1.6 seem
to share same valves (aspiration and exaust);
also camshafts are identical for all motors,
except they are been modified a little for one oring solution
(not modified in the cams) from the date 03-1992, so there are
two types of them based on the date, not on the motor model;
the only different camshaft seem to be one used
for a later revisited version of the 145 1.3
(with sligtly reduced cam total heigt from 37 mm (standard)
to 36,2 mm, different gears box ratios and ignition program)
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Alfa 33