Carbs on a TS

[meatpile]

Why can't you use the 'dumb' distributor ( as below ) and the stock ECU to run carbs?

If I can't, is there another source for the carbs distributor besides autocomponenti? He seems very bright, but I know of noone personally who he's responded to by telephone or email, and I'm unwilling to commit to a project that relies on a product of his that isn't in my hands.....

Thanks.

[alfasud]

Do you mean like this?
http://engr.smu.edu/rcam/cpm3v/gtvts/gtvts36.htm
http://engr.smu.edu/rcam/cpm3v/gtvts/gtvts37.htm

[Dr.G]

Jim Steck has been busy with the salt flats setting a new record with the Alfa turbo twinspark spider. I own the distributor from Autocomponenti, but my lower engine is at ABCO in Bothell getting cleaned and assembled, so I haven't got it running yet.
Alternatives would be the setup from Alfaholics which is the individual coil type, or making your own distributor with the instructions from Kartalamakis' new book in Chapter 3. Don't get discouraged, Jim Steck is very busy=good.

Wes

[69alfa]

I would think the computer would be very confused with no inputs for the fuel injection. It may run in limp home mode but that would do you little good.

As for other distributors look at this: Twin Spark Project

[meatpile]

We looked at the schematics for the ECU and it requires a ground for the airflow meter, which can be grounded elsewhere, but otherwise appears as if it will work fine for the 'dumb' type distributor.

It might be worth trying.

Thanks for the information on Steck and also alternatives!

[Craig]

The ECU will vary timing based on load (airflow-revs) so without an AFM you might have issues.

[Insoc]

You could try an aftermarket Electronic Ignition, and do away with the computer and distributer completly? However, you will loose the Vtech function as well I believe. That is why I think aftermarket cams are made for the TS engine that are not Vtech... Also, a modification to the intake is required for carbs, but I assume you know this...

I do not think it is at all possible to run the car on carbs with the stock ECU...

Sorry if my terminology is wrong, it is way past my bedtime...

[meatpile]

Well - I ordered Jim K's book - we'll probably try the ECU, and then we'll have a plan if that fails.

Here's a strightforward question - if I'm using the AH Motorsports intake manifold, what jets do I use for Webers? I'm thinking 40's.

Also - anybody know if the TS uses the same timing chain as the Nord?

[69alfa]

Think bigger you should be looking for DCOE 45's. If you buy them new the jets will be real close to what you want . The timing chains are the same. Other than the head the TS is very much the same as the nord.

[meatpile]

Quote:

Originally Posted by 69alfa Think bigger you should be looking for DCOE 45's. If you buy them new the jets will be real close to what you want . The timing chains are the same. Other than the head the TS is very much the same as the nord.

[Bruce Colby]

I have 45's on the TS in my race car. The engine is not really highly tuned, stock pistons, CR, street cams, etc. and peak power is at about 6000 rpm. If you check the conventional Webber selection references, you'll find that 45's should start to be better than 40's at around 6500 rpm. However, to get your power band shifted up there, you'll need higher CR (and higher octane fuel) and more cam than the stock engine provides. You'll also lose something in the lower rpm range in the process. I went with the 45's because I had expected to make a more highly tuned engine at some time in the future. Instead, I'm in the process of converting the race engine back to the stock TS Motronic EFI system because, frankly, the totally stock TS in my street GTV seems to have more and better power than the race car engine.

[Dr.G]

I'm going with the 45's just because of what I've been reading from the standard sites, AHMotorsports, EBSpares, OKParts, Jim Steck etc. I haven't got my setup running yet. My first Weber parts will be just what the Weber manuals recommend (plus\minus) on their graphs, combined with what "alfa1750" refers to on his website. Go to ebay, look up "alfa1750" and click on his "about me." Scroll down and you'll see setup specs for various HP's with the 45DCOE's.

That aside, AHMotorsports lists on their webpage as going with either 40DCOE's or 45DCOE's.

The chains are the same, but in order to use your mechanical tach, you'll have to redo the intermediate shaft components. Merrit Carden performed the machining for me with Jim Stecks specs. Jim supplied the info. to Merritt over the phone and apparently it's pretty simple. I'm putting a 155 TS 8 valve head on my Milano 75 TS lower block.

I've got the Weber specs from OKParts and Alfa1750 in my Alfa folder if you want to remind me later.

[TS_turbo]

Quote:

Originally Posted by meatpile Well - I ordered Jim K's book - we'll probably try the ECU, and then we'll have a plan if that fails. Here's a strightforward question - if I'm using the AH Motorsports intake manifold, what jets do I use for Webers? I'm thinking 40's. Also - anybody know if the TS uses the same timing chain as the Nord?

[junglejustice]

...one never knows what one will find over at Glenwood Motors....

[hughqv]

except you now might want to plug those injector holes, or is that where the nitrous is going?