QUOTE(SirAndy @ Mar 26 2009, 09:11 PM)
I ran 44 IDFs on my hot 2056. I had to choke them down to 32mm venturis to get rid of the off idle flat spot.
I can't imagine getting them to work right on a stock 1.7L ...
Andy
Even with them choked down, you probably still ran very rich around town, and got about 20mpg.
IMHO 36mm dual carbs are great on the 1.7 and 1.8.
40mm are to big, but will work.
40mm dual carbs on a 2.0 liter runs nice and its tunable...
If you change the camshaft and clean up the heads,,,,slightly larger valves, then 40mm dual carbs on a 2.0 liter are perfect.
If you increase the compression ration to around 11:1 or higher, and get a very aggresive camshaft, plus increase the valve sizes...then you could use 44mm carbs on a 2.0 liter.
The last example (Like King George said) is a motor that has no power below 3500 rpms....all the power is from 3500-7500 rpm...not a street car.
I think (dont quote me) Jake does not use 44mm carbs until 2.4 liters or more.
I had a 2.4 race motor running 40mm carbs...scca rules.
Rich