In Reply to: Here's why... posted by WH on April 26, 2000 at 22:04:42:
I hate to disagree, but the 2000TI came with 45 DCOE's, at least in 1966. I know this because I took a few apart, and I've seen it documented in writing. I have 45DCOE 15/16 carburettors with very low serial numbers, taken from a 2000TI that was going off to the crusher (horrors!). The setup was exactly the same as the 1800 TISA. The manifolds say "TISA" on them, etc. I don't think they went to the 40PHH Solex setup until the 2002TI introduction.
I do agree with you that the 45's are overkill, but other than my idle problem and a very-low-end flat spot (I need to bump up the idle jets a bit more), they seem to work well on the 2-liter. The price was right, of course. I'm running the stock cam and compression for now, so torque falls off over 5500 RPM. But compared to my 1-bbl and 2-bbl setups there's lots of power, particularly at 80-90mph.
I actually commute in this car. It's not that finicky, really.
>> The (200) 1800tisa's were built with one purpose in mind, homologation for racing purposes. Most of these cars would be on the track competing, that's why they used the 45 dcoe setup. It would be legal to run those carbs in racing trim.... Very smart when you have to compete against 1600 GTA Alfa's with twin overhead cams and twin spark plugs etc.
: For street use on a 2 liter motor use 40 dcoe's --the 45's are way overkill. If you are using 38mm venturies or smaller the 40 dcoe will give you better response and slightly higher torque at the low and mid rpm level due to increased intake air speeds, even with up to a 300 degree cam.
: The advantage of the 45 dcoe will not be seen till very high rpm (7000 rpm+), because it will simply flow more air to the engine. Most street engines never see that high a rpm for any length of time.
Thanks for the advice.