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alfetta mod's


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#1
bxnut

Posted 24 June 2006 - 09:16 PM

bxnut

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hello guru's and sifu's. i own a two litre alfetta with 45 weber's. i've
had her for 9 months now. she runs well and there is adequate power. I
was considering switching to the 2.5 v6 which apparently drops right in
until i read that alfa was already using twin spark's on their race cars
in the 60's. i love carbs, the simplicity, the sound and all that. so,
now i have decided to use a 75 engine, with a single(nissan) distributor
and keep the 45 weber's. Ah Kong has agreed to do this(cuba lah).the
manifold has to be machined. any of you guys has prior experience or info
you are willing to share regarding this?Thank you.Wink

#2
gtv2000

Posted 25 June 2006 - 02:56 PM

gtv2000

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It appears a lot of extra work for extra petrol consumption. Alfa 75s (2.0
litre) and Alfetta are almost the same in terms of layout. In other words,
a 75 twin spark two litre, complete with fuel injection and electronic
injection fits an Alfetta shell without much fuss. The result is a more
powerful and also more reliable and ECONOMICAL! car. No fuss with carb
tuning and setup.
In fact I am looking out for an Alfetta gt/gtv for such a modification. Am
in no hurry.
(If you want to e-mail, please use ar2000gtv@hotmail.com. Thank you and
best of luck).

#3
Taj156

Posted 25 June 2006 - 06:06 PM

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I have a '77 Alfetta 1.8 and i've fitted a 2.0 TS 8v engine from a '92
Alfa 75 2.0 TS. I'm also using the 75 gearbox, brakes and unfortunately
the 75 dashboard (which i don't particularly like). Having done all that,
my Fetta runs very well and is very reliable with this engine, fuel
injection and all. Hasn't failed me yet...


#4
johnks

Posted 30 June 2006 - 12:07 PM

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Taj,where did u mod your alfetta.it sounds quite interesting..


regards
johnks

#5
bxnut

Posted 05 July 2006 - 09:02 PM

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guys, its not easy to procure a 75 engine with harness and ECU. the whole
job will cost 7-8k. whereas the carb conversion will cost 1k+ only. I am
not worried about consumption because it wont be a daily drive.Apparently
there are guys in Ipoh with 3L GTV conversions. I'll try the carb
conversion first. Guys, I just love to take off on a lonely road, and
drive aimlessly for hours. Its therepeutic.On my last trip, i took my
alfetta from taiping to lumut, and on the way back, stopped at damai
laut. for these kind of drives, it is safer with carbs. there is an
alfetta with a 2.5 V6 stuck in Kuala Kangsar the past few months. control
box tak dapat.while i agree that the drop in conversion would be much
easier, but because of cost and reliability considerations, I'll choose
the carbs first. anyway guys, what kind of improved performance are we
talking about with the 75TS? How fast does a stock alfetta 1.8 or 2L go?
Tks for the input.

#6
Pininfarinna

Posted 06 July 2006 - 11:46 AM

Pininfarinna

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Alfetta.....power of Carburettor....alfetta 2.5V6 with number plate
2525..?

Love the power of carburettor the problem ...to find a good mechanic to
tune the engine....Ipoh not sure Ah Seng still around or not and Yan ex
Yan boss...in KL..so far for me only this two Mechanic really can tune
alfa romeo carburettor and Kok Nam Poh...not sure where is he now...Question




#7
tkw

Posted 08 July 2006 - 02:04 AM

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Hello Mr. Pinin,

Good to see you here again.

My project of doing up my Sud has completed and results are satisfactory,
given the fact that the engine and carb setup was entirely done by yours
truly. I'm actually pleased that the motor didn't blow up on my face.Smile

I have originally planned on boring out the engine to 1.7 litre but the
lack of a 1.7 crankshaft and cylinder heads scuttered the idea. So i'm
stuck with a 1.5 engine mated with a pair of Dellorto DRLA 40's that were
suitably jetted for a wild 1.7 that I don't have at the first place.Frown

It is now running overly rich, especially in the mid rpm's due to an
oversized main jet. The acceleration is less than startling because of a
bored out venturi. And it is gobbling up gas like an American Hummer..

So now I'm looking for a set of Dellorto DRLA 36's or Weber IDF 36's from
the original Sud TI or TI Cloverleaf. I will keep the DRLA 40's for a 1.7
engine, maybe a 16V from the 146 when funds permit.

Any help here from forumners here is most appreciated!

Cheers!

#8
bxnut

Posted 08 July 2006 - 06:17 PM

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I am curious, mr. Pinin. What are the technical differences between
dellorto's and weber's?

#9
wallacelee

Posted 08 July 2006 - 06:53 PM

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sorry to chip in,

bxnut, IMHO, i would say Dells are one of the best carbs ever made that i
have ever seen and played with.

1. dellortos are much more technically "advanced" compared to Webers.
2. they were built by "copying" the Weber design, but with a lot more
improvements.
3. visible improvements are the extra progression circuits in the body,
better and stronger throttle linkage, better choke mechanism, and a more
strategic location of the jets.
4. place both side by side and you will know what i am talking about.
Webers look ancient compared to them.

it has been tested that for the same size Dellortos WITH the same
venturis, Dellortos flow MUCH better compared to the equivalent Webers.
They are also much smoother.

However, when Webers started to be made in Spain, the did some
improvements to the newer carbs, the most obvious were by increasing the
progression circuits from 3 to 5. However build quality were shoddy even
compared to Italian Webers and they are still no match to
Dellortos.believe it or not, some of them came with unmarked jets, which
is shameful.

too bad production stopped in early 90s, but parts were still obtainable
till now, but they are getting rare. those who has Dells should order the
service kits and diphragms now.

hope i can see your Alfetta soon. i love Dellortos.

#10
Taj156

Posted 08 July 2006 - 08:59 PM

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johnks,

my alfetta was fitted with the 75TS engine, gearbox, brakes & dashboard
at Fresh Tools, Puchong cos they had '92 Alfa 75 halfcut there at the
time. Subsequent work, restoration, paintwork, interior work & other
repairs & maintenance undertaken by Alfa City Bangsar.