GRUMPY?
Is it really ever worth it to go dual quads instead of a a single carb?
Other than for cool looks, it seems like it would be too much hassle.
the answer to that depends on BOTH your skill at tuning and the parts selected, and what your goal is, yes a single quad is easier to tune but it lacks the nostalgic looks and its not necessarily going to cost you horsepower to swap to dual quads like many magazine articles would have you think, Ive rarely had any trouble at least equaling the power I could get with a single quad intake and carb and yes Its very possible to gain some power but like everything else , you need to know what your working with and how to set it up correctly.
dual quads get a bad rap, because probably half the guys are clueless on tuning them and easily 3/4 of the older intake designs were TRASH, plus you tune a tunnel ram in a totally different manor than traditional progressive dual quads on a low rise dual plane intake
http://www.holley.com/20-28.asp
if your using two holley vacuum secondary carbs on the street.....this might prove useful
to try to maintain exactly even fuel distribution between runners...which will almost never happen if the carbs open in a totally non synchronized manor
yes the NEWER EDELBROCK low rise is an improved version of the older intake, and while not the best available it will still produce good hp, easily matching most single carb intakes
the intakes above generally easily out perform something like this one below
but even that intake can usually at least equal a good single carb results
Ive had less than impressive results from intakes like these below
I think youll find a good deal of info in these links below
you generally start with both carbs fully closed and adjust the idle air screws out about 1 full turn, the rear carb is the primary so its set up to open about 1/4-1/2 way before the front secondary carbs primaries start too open, differences in leverage arm length and angles and a knowledge of linkage adjustment allows all four sets of venturies to progressively open in fairly uniform stages as the gas petals depressed past the 1/3 third depressed point , when properly adjusted you'll have a very smooth transition from idle to wide open throttle with zero bogs or hesitation, but it takes experience, having the fuel feed consistent and knowing how to set the ignition advance and jets accelerator pump cams etc to get it to respond almost instantly to throttle position changes without dead spots in the transition.
viewtopic.php?f=55&t=444&p=10794&hilit=dual+quads#p10794
viewtopic.php?f=55&t=5229
viewtopic.php?f=55&t=109
http://www.popularhotrodding.com/engine ... ewall.html
viewtopic.php?f=55&t=1820&p=4706&hilit=edelbrock+carbs#p4706
viewtopic.php?f=55&t=635
viewtopic.php?f=70&t=202
Is it really ever worth it to go dual quads instead of a a single carb?
Other than for cool looks, it seems like it would be too much hassle.
the answer to that depends on BOTH your skill at tuning and the parts selected, and what your goal is, yes a single quad is easier to tune but it lacks the nostalgic looks and its not necessarily going to cost you horsepower to swap to dual quads like many magazine articles would have you think, Ive rarely had any trouble at least equaling the power I could get with a single quad intake and carb and yes Its very possible to gain some power but like everything else , you need to know what your working with and how to set it up correctly.
dual quads get a bad rap, because probably half the guys are clueless on tuning them and easily 3/4 of the older intake designs were TRASH, plus you tune a tunnel ram in a totally different manor than traditional progressive dual quads on a low rise dual plane intake
http://www.holley.com/20-28.asp
if your using two holley vacuum secondary carbs on the street.....this might prove useful
to try to maintain exactly even fuel distribution between runners...which will almost never happen if the carbs open in a totally non synchronized manor
yes the NEWER EDELBROCK low rise is an improved version of the older intake, and while not the best available it will still produce good hp, easily matching most single carb intakes
the intakes above generally easily out perform something like this one below
but even that intake can usually at least equal a good single carb results
Ive had less than impressive results from intakes like these below
I think youll find a good deal of info in these links below
you generally start with both carbs fully closed and adjust the idle air screws out about 1 full turn, the rear carb is the primary so its set up to open about 1/4-1/2 way before the front secondary carbs primaries start too open, differences in leverage arm length and angles and a knowledge of linkage adjustment allows all four sets of venturies to progressively open in fairly uniform stages as the gas petals depressed past the 1/3 third depressed point , when properly adjusted you'll have a very smooth transition from idle to wide open throttle with zero bogs or hesitation, but it takes experience, having the fuel feed consistent and knowing how to set the ignition advance and jets accelerator pump cams etc to get it to respond almost instantly to throttle position changes without dead spots in the transition.
viewtopic.php?f=55&t=444&p=10794&hilit=dual+quads#p10794
viewtopic.php?f=55&t=5229
viewtopic.php?f=55&t=109
http://www.popularhotrodding.com/engine ... ewall.html
viewtopic.php?f=55&t=1820&p=4706&hilit=edelbrock+carbs#p4706
viewtopic.php?f=55&t=635
viewtopic.php?f=70&t=202
