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| Induction systems https://www.slantsix.org/forum/viewtopic.php?t=26844 |
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| Author: | Bren67Cuda904 [ Fri Jan 25, 2008 8:55 am ] |
| Post subject: | Induction systems |
What are the benifits of Offy vs Clifford vs the Clifford weber sidedraft intake? I would sure seem like the sidedraft setup would really be the best at getting air into it. Ofcourse I know I need to get it out too. Has anyone used this setup? How is air filteration handled? |
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| Author: | 66aCUDA [ Fri Jan 25, 2008 9:05 am ] |
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Brenan The 3 Weber setup uses carb hats or elements either one. I have also seen a commmon air intake plenum that was filtered. Hope that helps, Frank |
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| Author: | runvs_826 [ Fri Jan 25, 2008 12:20 pm ] |
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I don't know what carb/cam combo your running Brennan, but from everything I've read the Offy seems to flow a little bit better than the clifford. To me your splitting hairs, unless your intake - gasket - head is all ported to match, we could get great numbers on the flowbench, but once you strap on a intake that isn't matched you can watch those numbers drop like the rain in Oregon. Flow Benches and Dynos - Mechanical Heartbreakers |
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| Author: | dakight [ Fri Jan 25, 2008 4:37 pm ] |
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With the 3 webers you get one throat per cylinder plus it's a straight shot into the head; no more fuel distribution problems. The downside is keeping all the carbs synchonized. |
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| Author: | Bren67Cuda904 [ Fri Jan 25, 2008 6:30 pm ] |
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Quote: With the 3 webers you get one throat per cylinder plus it's a straight shot into the head; no more fuel distribution problems. The downside is keeping all the carbs synchonized.
One more downside is the cost of those 3 carbs. Heard they run about $450 EACH plus manifold.  Going to stick with the Offy or Standard water Clifford. |
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| Author: | Rob64GT [ Fri Jan 25, 2008 8:56 pm ] |
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I have both an Offy and a Clifford manifold. Both have there advantages, but the Clifford has a larger plenum and larger runners. Also the Clifford is water heated so it takes longer to warm up but is more consistent once its up to operating temperature. Caution only the later Cliffords are water heated the early models are unheated or have a heat stove like a stock manifold. Also its a tight fit with a Dutra Dual in the rear position, some grinding is required. Headers will fit fine but there always the problem of the flange thickness, the intake flange is thicker than the headers flange. |
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| Author: | Dart270 [ Sat Jan 26, 2008 5:30 am ] |
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Offy tends to have better low end and Clifford better high end, due to runner area and manifold design. Some fitment issues as Rob says. Usually I say use the Offy on most street cars, but your big displacement may really like the Clifford. In back-back testing, I've seen that the Clifford will give up a little time at the early part of the track and then gain it back at the top and add MPH. This is with a 2800 or lower converter, like you have. Net gain is about cancelled. In your case, it may not lose much down low. Lou |
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| Author: | slantzilla [ Sat Jan 26, 2008 6:18 am ] |
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I tested an Offy and Clifford on my junk when it was still a daily driver street car. The Clifford gave up 3 tenths in the 1/8th mile, and never regained it. It did run more MPH though. Car had a 3500ish stall converter in it at the time, 3.91 gears, and was running 14:30's with the Offy. Not all Cliffords are water heated, just the later ones. Clifford does sell (or used too) a water heated spacer plate you can put under the carb. |
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| Author: | LUCKY13 [ Wed Apr 16, 2008 7:37 am ] |
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Quote: I tested an Offy and Clifford on my junk when it was still a daily driver street car. The Clifford gave up 3 tenths in the 1/8th mile, and never regained it. It did run more MPH though. Car had a 3500ish stall converter in it at the time, 3.91 gears, and was running 14:30's with the Offy.
Slantzilla, I was just wandering if you rejetted the carb when you made that test ?Not all Cliffords are water heated, just the later ones. Clifford does sell (or used too) a water heated spacer plate you can put under the carb. Jess |
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| Author: | slantzilla [ Wed Apr 16, 2008 9:56 am ] |
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Yep. 
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| Author: | Slanted Opinion [ Wed Apr 16, 2008 6:37 pm ] |
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Don't forget that you can also do the 3 sidedraft carb setup with SU carbs and intake. |
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| Author: | Kidd [ Wed Apr 16, 2008 9:29 pm ] |
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can you use the Solex carbs on the side drafe set up? I ask because my buddy has 2 I can get... Andrew |
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