Holley, Weber, Dellorto, or DCD?
11-13-17, 03:54 AM
#1
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Holley, Weber, Dellorto, or DCD?
So I'm trying to decide which route to go when I finally buy a car 
. I like the look and "wow" factor of the weber dcd, but the only other carb I've had some seat time in was a Dellorto on a 13b 4 port and it was fun.
I've tried to read through all the older threads of the DCD and it seems like there's more pros than cons to running that setup. However, the fact that it's not currently being produced anymore worries me for fear that it'll be hard to find parts when I need it and there's not many around. I know there are 12a setups and I read that RE also made for the 13b 4 port. Please correct me if I'm wrong.
What I'm looking for are people who have first had experience with all of the different carbs and can give an unbiased opinion on which setup they prefer and why. Thanks guys!
. I like the look and "wow" factor of the weber dcd, but the only other carb I've had some seat time in was a Dellorto on a 13b 4 port and it was fun.I've tried to read through all the older threads of the DCD and it seems like there's more pros than cons to running that setup. However, the fact that it's not currently being produced anymore worries me for fear that it'll be hard to find parts when I need it and there's not many around. I know there are 12a setups and I read that RE also made for the 13b 4 port. Please correct me if I'm wrong.
What I'm looking for are people who have first had experience with all of the different carbs and can give an unbiased opinion on which setup they prefer and why. Thanks guys!
11-13-17, 09:50 AM
#2
Waffles - hmmm good
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Had a Dellorto on my SA since about 1993 until 2015. Its a fun carb and has some downfalls when cornering right hand if I remember right but you can easily learn to drive through that. The only other pitfall is that you loose some top-end but gain more drivability across a wider rpm range. Thats all due to the long wrap around intake RB normally delivered with the kit. Oh and it has to have all the RB modifications, just a plain Dellorto 48 isn't going to work well with a rotary. I now have a hogged out Nikki that has none of these drawbacks and is very driveable from 1200 to +7000 rpm with a really flat torque curve (unverified, butt dyno measurement) and no bogs or cornering issues with fuel delivery. If you think about it, the rotary is designed to be fed by a proper 4 barrell, with the secondaries delivering to the secondary ports. Holleys for sure and other american 4 barrels may not be designed to work well with a rotary due to the wonky vacuum characteristics of the rotary with the intake pulses that come with it.
The weber downdrafts, especially the progressive dual DCDs are another great solution. Weber parts are still easy to get ahold of and this was one of the premier race setups back in the day. I know a couple of guys that run them and swear by them (not at them).
The weber downdrafts, especially the progressive dual DCDs are another great solution. Weber parts are still easy to get ahold of and this was one of the premier race setups back in the day. I know a couple of guys that run them and swear by them (not at them).
11-13-17, 08:53 PM
#3
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finding a dual DCD intake might be hard, but weber parts are really easy
11-15-17, 05:41 AM
#4
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Thread Starter
Had a Dellorto on my SA since about 1993 until 2015. Its a fun carb and has some downfalls when cornering right hand if I remember right but you can easily learn to drive through that. The only other pitfall is that you loose some top-end but gain more drivability across a wider rpm range. Thats all due to the long wrap around intake RB normally delivered with the kit. Oh and it has to have all the RB modifications, just a plain Dellorto 48 isn't going to work well with a rotary. I now have a hogged out Nikki that has none of these drawbacks and is very driveable from 1200 to +7000 rpm with a really flat torque curve (unverified, butt dyno measurement) and no bogs or cornering issues with fuel delivery. If you think about it, the rotary is designed to be fed by a proper 4 barrell, with the secondaries delivering to the secondary ports. Holleys for sure and other american 4 barrels may not be designed to work well with a rotary due to the wonky vacuum characteristics of the rotary with the intake pulses that come with it.
The weber downdrafts, especially the progressive dual DCDs are another great solution. Weber parts are still easy to get ahold of and this was one of the premier race setups back in the day. I know a couple of guys that run them and swear by them (not at them).
The weber downdrafts, especially the progressive dual DCDs are another great solution. Weber parts are still easy to get ahold of and this was one of the premier race setups back in the day. I know a couple of guys that run them and swear by them (not at them).
For the most part the dellorto would be driven on the road so I probably won't have to worry to much about the right hand cornering but it's not a deal breaker.
Who sells the weber parts? I've heard of Pierce manifolds but anyone else you know of?
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11-16-17, 06:28 AM
#8
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11-16-17, 12:04 PM
#9
Not sure what you're looking to use the car for - but, I've ran a Weber for about 20K now. Car goes like raging hell all the way to the redline, but - it's an on the gas/off the gas proposition with the carb. Fun to drive, but not too much fun to cruise. My drive is is almost all highway, so it's not too much an issue - but it's not very smooth in town. I've considered a hogged Nikki as a possibly smoother driving alternative...
11-19-17, 10:17 AM
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