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Old 12-20-2010, 10:53 PM
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Best Carb for a SuperCharged Engine?

I am seeking advice from other hotrodders that have experience with supercharged engines. Specifically, I would like to know what carburetor is recommended for a 350 chevy using a 142 Weiand supercharger? The engine was rebuilt with the supercharger in mind, so it has steel rods, pistons, crank, etc. Their are several carbs on the market, and it gets confusing knowing which one to go with. Hopefully, there are guys on here that have first hand experience with this kind of set up.

Any help would be appreciated.

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Old 12-21-2010, 10:44 AM
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I've never built a specific blown motor but if you do a search on this forum you'll find quite a bit of info. Also if you google "which blower carb" you will find lots of info from numerous mfg's and engine builders. Since you're using Weiand parts you might try calling them for their suggestions?
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Old 12-21-2010, 01:14 PM
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You're going to get a lot of different opinions from us blower guys, myself I user and have good luck with Barry Grant's BC series, blower prepped. Whatever you choose, make sure it's boost referenced, but go bigger and have fun.
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Old 12-21-2010, 02:27 PM
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Quote:
Originally Posted by trifivefan
I am seeking advice from other hotrodders that have experience with supercharged engines. Specifically, I would like to know what carburetor is recommended for a 350 chevy using a 142 Weiand supercharger? The engine was rebuilt with the supercharger in mind, so it has steel rods, pistons, crank, etc. Their are several carbs on the market, and it gets confusing knowing which one to go with. Hopefully, there are guys on here that have first hand experience with this kind of set up.

Any help would be appreciated.
750-850 will be more than enough. Vacuum secondaries will work ok. The carburetor will need to be boost referenced if it is a Holley style and has a power valve. The mixture should be fattened up a bit (go up a couple jet sizes) for safety. A final tune on a dyno for A/F ratio tuning will be most helpful in assuring the engine stays together.

What is your static compression ratio.
Did you use forged pistons?
the 2 worst things for a supercharged engine are detonation and lean mixture
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Old 12-22-2010, 05:41 PM
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use a edelbrock or an afb 750 trouble free no power valve . highly recommended in the street supercharging book . I have run these on 6-71 with absolutely no trouble ( use 2 on the 6-71)
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Old 12-23-2010, 12:22 AM
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While I currently am running a Weiand 250 (basically a 4:71 GMC) blower with two 600 Holleys on a 355 SBC, my previous setup was a 355 with a Weiand 144 and a single 800 cfm Edelbrock. For a street blower setup, I have only positive things to say about running the 144 with an 800 Edelbrock. I also, by the way, agree that, if one is going to run more boost as I am now choosing with the Weiand 250, running boost referenced multiple carbs is not only wise, but likely essential. It is not that complicated to boost reference Edelbrocks, just as one can boost reference Holleys. But once one goes beyond the mild boost of 144/142 single carb blowers, boost referncing is essential. And a final note: I have been working with hot rods for 50 years. My only regret is that, for the first 40, I did not tap into blown setups. Blowers work, and are fabulously, easy to maintain, FUN !
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Old 12-23-2010, 12:50 AM
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I would highly recommend a Predator. You can use them out of the box as is. I know a lot of the people who have actually used them on a supercharged engine recommend them hands down.

Carbs are like women, everyone likes something a little different
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Old 12-23-2010, 01:34 AM
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I didnt do specific build,but 750-850 can work well
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