There is a calculation about what is the maximum size (in CFM) of carb you can logically fit on your engine.
I seem to remember it went something like Cubic Inch Displacement X maximum revs you'll be using (be honest now...
), which is then divided by the constant figure 3456.
If you have, say, a 202 cube motor, times say 6000rpm, divided by the "constant" figure (3456) you get 350, in other words a 350 Holley is alright
providing you will honesty be taking it to those revs and it is jetted properly...6000rpm would be, I imagine, a worked 202.
This is for naturally aspirated engines of course, and depends on other factors such as exhaust headers and system being set up too...you can't just bolt a 350 Holley on a stock motor unless you are good with jetting and power valves...
OH...don't forget...if the Holley is second hand, check the accelerator pump to see if some genius has listened to his mates and put on something like a 25cc pump instead of the standard 15cc or so pump..."It'll make more power when you tromp on it dude!!!" :b:
That'll flood buggery out of a motor quick smart down low! Also in this case check the power valve..."Yeah mate, whack in a bigger one...if she's got a .65 in her, imagine how much more fuel you'll be able to get in there with an .85!!! Sick mate!!!!" :b:
I also remember having to fit sleeves in the throat of a 350 Holley my sister-in-law had on a 179 Torana. They were part of a kit to "neck down" the carb to the standard of a 300 or so CFM carb, and
then we had to spend a
long night in the garage trying to get it jetted properly...would have been easier to fit something else...jeez that was a fun night... :b:
