Carb help

[ed5000]

Hi all,

I have a 1286 Super which I'm slowly putting back on the road. The engine only has 68000 miles up and is in great condition. I've just given it a full service i.e belts, plugs, filters, full exhaust etc and I'd like to start pepping it up a bit. Would the Weber 32 DIR twin choke carb from a TI be of much benefit at this stage? I'm not looking to build an all out screamer just simple bolt on stuff for now. I may go down the twin carb route in future but funds don't allow it at the moment.

[Alfa_Japan]

Congrats on 1286cc Super, nice car. I don't have an answer to your question but others on this forum will surely have. In your list of items you didn't mention the cooling fluid pump. I hope you changed that at the same time with your timing belt? Most probably you did, but just to be sure and avoid nasty surprises I wanted to address the matter.

Good luck with putting he car back on the road! Love to see some pictures

[ed5000]

Hi,

Thanks for the reply. I did replace the water pump when I replaced the belts and tensioners. It's better to be safe than sorry! I've no current photos of the car as it's away getting rewired at the moment. The only photo I have is a bad one from my when it came back from the painters over a year ago. I still have to fit all the new external trim parts I've collected over the last few years. I'll stick up some better pictures when I finally get car back together and properly cleaned up

.

[Veesix75]

The 1200ti had 5bhp more than the standard 1200.

Most of that will be the twin choke carb so it gives you a view of any potential gain.

[Veesix75]

Nice wheels, are they Momo or 100+.....?

[ed5000]

That makes sense. I'll keep a look out for the manifold. There seems to be loads of carbs around for sale but I can't seem to find a suitable manifold. The wheels are Momo's. They've been on the car since new. They're really light and I suspect they may be magnesium.

[jobeed]

I have a couple of manifolds for a single carb in the garage.

If one of them is suitable you can have it for the postage cost.

Just remembered i might have a twin choke webber too! Will check the garage! PM me if of interest

Jon

[ed5000]

I have a couple of manifolds for a single carb in the garage.

If one of them is suitable you can have it for the postage cost.

Just remembered i might have a twin choke webber too! Will check the garage! PM me if of interest

Jon

Fantastic. PM sent!

[jobeed]

Will check garage this morning and send you a pm. If I have one you can have it.

Jon

[Alfa_Japan]

This is of no help with your technical issue, but the car looks like a gem. Enjoy the final process of getting it back on the road.

[ed5000]

This is of no help with your technical issue, but the car looks like a gem. Enjoy the final process of getting it back on the road.

Thanks. It's not perfect but It'll be sorted eventually!

[Alfasud1978]

Hi there. Mine is a 1978 Alfasud Super 1286cc as well and I have recently replaced the Dellorto FRDA32F single choke with a Weber 32/36 DGV 5A manual choke. I have purchased the weber kit that includes a free flow air filter and most importantly the 1bbl to 2bbl manifold adapter. The engine has now more torque and generally more power. Highway cruising is definitely more relaxing with 70-80mph. Idling is also very smooth and the car is miles better with town driving. The only problem faced is hesitation under brisk acceleration. I think the manifold restriction due to the single choke is to blame for. I personally strongly recommend the use of the twin choke preferably with a twin choke inlet manifold of the 1.3Ti.

[ed5000]

Hi there. Mine is a 1978 Alfasud Super 1286cc as well and I have recently replaced the Dellorto FRDA32F single choke with a Weber 32/36 DGV 5A manual choke. I have purchased the weber kit that includes a free flow air filter and most importantly the 1bbl to 2bbl manifold adapter. The engine has now more torque and generally more power. Highway cruising is definitely more relaxing with 70-80mph. Idling is also very smooth and the car is miles better with town driving. The only problem faced is hesitation under brisk acceleration. I think the manifold restriction due to the single choke is to blame for. I personally strongly recommend the use of the twin choke preferably with a twin choke inlet manifold of the 1.3Ti.

Thanks. That's just the sort of information I needed to hear. I'm definitely going to make this upgrade. I think I've seen pictures of your Super before. Is it the one with the great looking TI steel wheels fitted?

[Alfasud1978]

Yes must be my Alfasud you have seen before. Currently the car is fitted with 14" alloys, to accommodate wider tyres for classic cars circuit racing. Steel ones will later be refurbished and be fitted on leaving the alloys for the racing events. I will take a photo of the new carb set-up and upload it in a couple of days. Nice to hear that more Alfa Super are still around.

p.s. Shrew many thanks for the rear suspension set-up supplied to me through our mutual friend, Chris. The rear of the car has now outstanding grip and minimum to zero roll.

[Alfasud1978]

IMPORTANT UPDATE:
Last Saturday had the opportunity to test the new carb in action when took part with the Alfa Romeo Cyprus Club in a circuit meeting. Well the car had more power and speed on the straight line but around curves the engine was suffering with fuel starvation/flat spots. It looks that Weber was emptying its fuel bowl faster than the mechanical fuel pump could manage. An electric fuel pump will be installed in a couple of days and I will update you accordingly.

[Kegsti66]

Great pictures, lovely car.

[ed5000]

IMPORTANT UPDATE:
Last Saturday had the opportunity to test the new carb in action when took part with the Alfa Romeo Cyprus Club in a circuit meeting. Well the car had more power and speed on the straight line but around curves the engine was suffering with fuel starvation/flat spots. It looks that Weber was emptying its fuel bowl faster than the mechanical fuel pump could manage. An electric fuel pump will be installed in a couple of days and I will update you accordingly.

Thanks for the updates. I look forward to hearing if the new fuel pump works . Beautiful car by the way.

[Alfasud1978]

Car is ready for Sundays race. Temperature is around 27C. If everything works as it should be I will give you important installation details as not everything was easily fitted.
I will also update some photos. Tip: The car is definetely for powerful. Crossed fingers.

[Alfasud1978]

Me again. The new carb set-up was race tested last Sunday and I assure you it is worth the buy. Though you must bear in mind that the inlet manifold needs the 1bbl to 2bbl adapter plate (included in the kit) and must be fitted in a way that the carb's fuel supply is facing at the front (see pics) other wise flat spots will be present when cornering at a speed. You must also upgrade the mechanical fuel pump to an electric one of a low pressure high volume. Return fuel hose is not required with Weber carbs and you should block it. Having in mind the higher air temperatures in Cyprus and that the air filter is now without a housing and that hot air reduces engine output I have installed a front grill air duct to guide fresh air to the filter. Note that the adapter plate is designed for a bit different engine layout and had to grind some bits of it to fit. A bit of a tricky job.

Well the car is now much more responsive around town, choke is now needed for the first few minutes and engine revs more freely at the higher revs. The car is very strong at highway cruising and to uphill roads. Fuel consumption? I don't really know but track one was definitely higher that before. Highway one will probably be the same or even a bit lower.

The vroooom it makes is the best part of the mod. The engine now sounds more racy with more bass.

[ed5000]

That looks fantastic! It's a modification I will definitely be making. Many thanks for the detailed description and pictures. That is a great looking car.

[Alfasud1978]

Thanks mate. Mod will be 100% completed if a twin carb inlet manifold is fitted as well.

[Alfasud1978]

Last update regarding the air filtration. A new intake manifold (from the 1.3Ti) was traced and fitted quite easily. Last mod to be done was to upgrade the air filtration set up in order to avoid hot air coming into the engine resulting to a lower power output. You can either use the stock air filter housing but you need to refabricate its lower side to accommodate the new carb or go for a Weber Plenum and a cool air filter. (see photo). First impressions are positive as the flat spot/hesitation is basically gone, the mid range torque feels a bit stronger and the noise (music for some of us) lowered.

Overall: A must mod irrespective of cost. The car is now much faster and more relaxed in modern traffic. Ooooh I forgot it is more fun than ever.....