131mirafiori forum

 
Im running the 32adf which i know now from this site is not the correct carb for the 2.0 T.C.
 Will the 34 increase power by much compared to the 32 ?. and is it worth changing i assume it is as the 32 is too small ?
Its annoying me knowing its not running the right carb.But the 32 is running ok.
Am i better just changeing it out ??.
 I read on an other page that Miro may have a 34 adf reconditioned and rebuilt.Or buy one on OZ ebay?
Miro if you still have leave me a message please.
ill be off line tonite till tomorow but will reply.
Thanks 106

34 ADF is a brilliant carb and when running right is a good performer. It looks like you've got a 1600tc carb fitted.

A Sport needs a 34ADF if not running twin carbs. I've got a few of these spare, but it's a case of finding them.

I feel like putting the 34ADF back on my green Sport as the 45'S require rolling road set up and are doing my nut in at the moment. Seems to be running to rich and is fouling the plugs.

Check out the inlet manifold as well as although they all interfit I am sure from memory 34adf one had slightly bigger ports than the 32 carb manifold

I forgot about that 131 2.0 tc engine i bought as a spare.Hopefully that will have the weber 34 and correct manifold on it so i can do a straight swap after a carb rebuild that is.
Only problem it is in my mates lock up 300 odd miles away.
No rush as i have the start problem i had sorted i hope and the 32 weber is fine just now (Touch wood !!)
I hope to collect and take home the spare engine in Jan or Feb nxt year its low miles guy swore it only had done 69k when he took it out of the 131.But it was used in competition for its last 6 months before i got it, Still it will come in usefull for many parts.

Where is the best place to get a rebuild kit gaskets etc for the 34 carb (ebay ?)
Also will it increase power by much replacing the 32 for the 34 carb ???????

Rebuild kits come up on ebay or try Matt at Eurocarb they usually have them in stock.

How much of a difference you will notice by swapping the carbs I don't know, but it must be better to have the correct one ;)

Ok cheers Dave.

The 32, 34 refers to the size of the throttle plate on the throttle shaft, what will have more impact on performance is the size of the main venturis, (the poms call them chokes). The 34 ADF/ADFA has 24/26 venturis from memory, where as the 34ADM has 27/29 venturis, same size throttle plates, big difference in performance.

With regards to Davids comment about the inlet manifold for the 34 having bigger ports.
Can any one identify the following part numbers on the bottom of my manifold as follows when all the festive drinking is over that is  ;D ;D ;D

FIAT 132 DB
4407484 C 8
G- A 591

The 32 adf 4 250 weber i have is from a 1600 as stated by Sav and backed up by Haynes manual page 188 bottom left
When i get round to fitting the 34 adf from my spare engine if the above manifold i have is ok it will save me removing it.
Can any one shed any light on wheather the manifold is for the 2.0 or 1.6 going by the above codes or let me know where i might find out ie web address. Thanks ...

This is probably a silly question but are you sure you've got a 2000 engine and someone hasn't swapped it for a 1600?

Theo.  :) :)
I am sure it is the 2.0 tc as ive checked the numbers on the block first thing i did.Also checked all other numbers on the car.
For some reason the previous owner has fitted a 1600 cc carb setup on it.The inlet manifold im not sure about.
Also the distributor cap im not sure about but all else tallys up....
I will investigate into why it has the 1600 carb and find out and let you know.
Cheers..

Ok Theo.
I was half right about it being a 131 2.0 engine. When i went to look at the car i checked the chassis numbers and data plate to confirm it was a Sport 2.0 when i checked the engine number stamped onto the block i just looked for the 000s and all was fine.
As discussed the carb is the wrong type i know that now so i re checked engine number and by the sounds of things the engine has been changed at some point, when i dont know.
The codes on the clinder  block adjacent to the distributor are as follows.

Engine number (132  02  000)  Manifold number is in previous posts and distributor number too
                         (073  47  15.)
So it is a 2.0 but looks like its out of a 132 as the 131 Sport  engine number should be 131 B2 ooo

Here is one on ebay in scotland also
http://cgi.ebay.co.uk/fiat-lancia-twincam-twin-cam-weber-carb-plus-manifold_W0QQitemZ150400866058QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item230497170a

I thought 2 litre Lancias had a different carb to the 2 litre Fiats. I'll check my Trevi....

Not the best of pictures.
?50 i think i will wait till i get the 34 off my spare engine in jan or feb that one would prob need a strip down and clean and new gaskets although it does come with the manifold if its correct.

Do we all agree the engine i have has been replaced from the original with a 2.0 132 engine as i have searched Google to try and find ways of identifing fiat engine numbers that are on it and with no luck.
The engine number and type are on my previous post
Any one have any ideas  ??? ??? please post when you have time or after festive season.
Thanks.
I made a mistake with numbers i put a 0 instead of a C so engine number as follows. On the engine type the first digit could be a c also hard to make out but i think its a 0

132 C2  000  TYPE O73 4715

I did find this on google.
Model identification
www.international-auto.com
I typed into google Fiat 132 engine identification this came up on page 2 6th post down.
131 Brava 1978 engine type as
1995cc engine types as follows
123 C2 040      132 C2 031
Now im lost ??? ???

According to Enso's post and link on page 1 post number 2 the garage
Subject - engine numbers in mk 1 131 special. Author Cooter131

The engine number tallys up with the data 132 C 2. 000 is the 2000CC engine Category B.
will i get any more info from the engine type numbers i have  073 4715. //
Was there any real differance between this twin cam engine and the original 131 B2 000 //

I am getting too old to remember numbers but I think the 131B1 1995cc engine (original 131 Sport/Racing engine) is rated at 115 bhp while the later 132C2 engine as fitted to the 132 and later 131 Supermirafioris was rated at 113bhp. The driving differences are apparently more than the mere 2 bhp would suggest but I wouldn't know.

Out of interest, the 115 bhp engine in the Lancia Trevi is a 828 B1 000 and uses a 34 DAT 2/251 carburettor (or 34 DAT 2/151 for A/C and/or Auto transmission). The engine in Lancia installations is tilted 20 degrees so I would think a Lancia inlet manifold is no good for a Fiat 131.     

Intresting so the manifold on ebay will only fit either the fiat only or lancia only not either or !!

I know of a genuine 131 sport engine with genuine 60k miles when it was removed so i might just look into trying to buy it of the guy.
When ever i get round to the respray i might just do a swap and replace i will see. The engine i have is running well so far so no issues there.
Just need to get the 34 carb on. Still dont know why the 32 carb was fitted ??

what about a set of twin 40 or 45s?

CK.
I have thought about it i bid on a few second handers but lost them by a few pounds.
I priced a brand new set to fit the 131 tc 2.0 a set of 45s with complete manifold for about ?750 about 3 weeks ago, i am so tempted to credit card them but i am going to wait and get some more ??? together.
The 45s is something i will do for sure.

Jaysus I have a set of very clean 40's on original manifold and they are no where near 750 pound if you want as they wont bruise the credit card too bad..

Red Lad.
I know that is very steep i just picked a random site and asked for a price for Fiat 131 set up email followed.
Weber 45 DCOE ?497    Linkage ?80   Manifold ?167   TOTAL ?744.
If you have a complete set of 40s with manifold send me a private message and  maybe we can do a deal i hope.
Thanks

RedLad.
This price was offcourse for all 3 items brand new,  but even still  i know it was a steep price hence why i never  replied to the email. For a while there were 3 or 4 on ebay uk for reasonable prices in oct - nov but i missed them on bids various types Dollerto and Weber.

not steep thats about right for new stuff, carbs are probably a bit dearer though?

Brand new weber45 DCOE ?497 - linkage ?80.
Sid ?
What is the better set up for the 131 tc engine the 40s set up or the 45s set up ie which runs better with the engine and which gives least grief.
Thanks

40 would be better for a standard 2 litre engine. And the downdraught IDFs will give a lot less grief than the sidedraught  DCOE.

 Re - twin 40s & 45s.
Right Theo thats good to know.
Thanks.
? Have you read the article in Retro cars mag Jan 2010 issue 19 page 82 about the piper cams set up fitted new to the golf with the before and after bhp dyno readings intresting........

i have a set of 44 idf webers & a manifold but they need to be rebuilt

What sort of manifold? The 124BC setup or something else?

not sure they came on a 131 sport, looks like a waffle pattern on it & the dizzy has to go in the head

It's probably the 124BC setup by the sounds of it, often referred to as the waffle top. I don't know if they were fitted to anything else besides the 124.

It used to be common practice to fit the 124BC manifold and carbs to 131s. I didn't think the distributor had to be on the head for that though  :-\  I thought the advantage of this setup is that the dizzy can stay in the block.

The dizzy was in the head on this engine Theo, i kept the head & carbs,

Yes the 124 BC had a head mounted dizzy. I suppose if the complete 124BC head with carbs would fit the 131 2-litre then there's extra horsepower to be gained. The 1600 124BC engine had 110bhp, only 5 short of the 131's 2-litre engine and I'm sure the extra 'efficiency' was in the head and cams as well as the twin carbs. But I thought the 1608cc head would not fit the 2 litre block and the 1592 head which would fit the 2-litre block didn't come with twin IDFs. I may be wrong in all of the above and I'll wait for the red lad to give us the corrections  ;) ;D.  But to get to my original point, I am fairly sure that the twin IDFs on the 124BC manifold will fit a standard 2-litre engine with the dizzy in the block. If you have the Marelli ignition then it's a bit difficult to take the dizzy cup off but there are no problems with the Bosch ignition and dizzy.

Well Theo you knew it was going to happen, but the 124cc had the 110bhp aswell but in the CC it didnt have the twin carbs but the heads will interchange. If you have the dissy in the block you need a different dissy cap for clearance but the 1600 was the engine as with 3.5bhp less then a 2 litre but with less torque it had a real hard revving Italian sound to it as many people know from my little baby going past them  ;D ;D ;D sure I might stick it against yours Theo and we can have a laugh  :D :D

You mean the head of 1592cc or 1756cc will fit the block of a 1608cc?  I though to get 1756CC Fiat had to change the block to get bigger bores and then the 1756cc blocks were stroked to get the 1995cc capacity.  :-\

If you want to interchange them you can but you are now modifying the engine so a bit of knowledge and engineering is needed but can be done

i cant get up to the attic to check the head number the roller is jacked up & i aint moving it until next week, the engine was a 131 sport engine, red fella when are yourself & bren coming up here for a visit?

Hope to get up soon but is there enough beer up there for hollow legs...

Thanks for the offer Sid Re twin 40s.
Im looking for bolt on and go set if possible not a rebuild job.
Like i said thanks for the offer though.  :)

well if we go to forkhill the beer is half the price then he can drink twice as much for the same money

those are 44 idf carbs i have twin 40 delortos & weber 45s side draughts also that may be sold in time, have a few of the 34 adf single carbs but not selling any thing until my car is finished except those 44 idfs

OK Sid.
In contact with Redlad jst now about his set, failing that keep me in mind if and when you sell.

So I was right; they are not interchangeable. Anything can be done with modifications and engineering but that's not "interchangeable".

no worries the red fella is honest & wont sell you crap.

There is no benefit in fitting the head onto the 84mm bore block, smaller valves and ports negate any possible compression gain and the story that 1608 cams are better is an urban myth.

now please someone explain to me, how can a head from 1608ccm (80mm pistons) be fitted to any engine block with 84mm bore???
head from 1608ccm is shorter and spaces between bores in a 1608ccm block are smaller! just compare the headgaskets from 1608ccm and any other 1.6, 1.8 or 2.0 else and you'll see that 1608 block is shorter by at least 1cm

It will fit with some modifications. From Guy Crofts first book, head from "1608 124 sport" - "early - needs coolant gallery mods to fit 84mm bore engines".

even than combustion chambers will remain offset to cilinders. nuts!