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ditch the filter before the carb IF you have a good free flowing filter before the fuel pump.
big venturies will give a weaker low-end but if you dont road race, its good to have. Im running 43 and 44 with 75 idle 130 air and 230 main. no issues.
ok guys i have 2 different manifolds for my 51IDA which in you opion is a better option!
1 has been opened up at the weber end to match the 51mm and still has a rough casting inside to standard ish ports
the other has been smoothed inside and opened up at the engine side but currently 48mm at weber end
i'm thinking the one matched with the 51IDA is better, rough to help the fuel air mix and my ports arn't as big as the other one has been opened!
can always take metal out!
the tall stacks will make a rotary lean out on top end. the medium size is much better.
im still using the stock stacks, just fitted the 51, idle is cool with F9 65's ordered some more jets looking at 195 / 205 mains with 160 / 150 air still running 40 chokes
Last edited by mpk490p; Apr 14, 2009 at 03:16 PM.
Reason: added photos
For a weber Ida. Is there a specific float level for rotaries or are the float level for all type of vehicles the same? I just did a rebuild on my carburator and I bought a float level gauge like the image below. The float level supposed to be somewhere in between the 2 lines close to the top of the gauge. Right now currently my float level is all the way to the top past the 2 lines. It runs fine, but I wanna have it correct. Thanks for any input
On a pelican parts forum some had posted that the suggested fuel levels are like the ones below for a porsche.
on a Rotary you want the float as high as you can without the boosters dripping (a race car can drip a little)
piston engines are lazy, the intake stroke is 180 degrees out of 720, so when you have 1 cylinder per barrel there is not much airflow, and it doesn't happen very often. this is what the carb is designed for.
a rotary engine is not lazy, there are three chambers per barrel so the carb needs to flow more fuel than it would on a piston engine. the rotary doesn't close the intake port, it just switches chambers
