blow thru vs. draw thru with a Procharger and carb?

**OkieDave** · 10-26-2011, 07:47 AM

Opinions on the merits of blow thru vs. draw thru. I have a Procharger and a spare cheyenne hull. thinking about building a LS chevy w the procharger and trying to make it outrun my BBF cheyenne. no exp. w any type of blown build nor any LS chevy exp. other than I have a Corvette.

**Hass828** · 10-26-2011, 08:08 AM

Originally Posted by OkieDave

Opinions on the merits of blow thru vs. draw thru. I have a Procharger and a spare cheyenne hull. thinking about building a LS chevy w the procharger and trying to make it outrun my BBF cheyenne. no exp. w any type of blown build nor any LS chevy exp. other than I have a Corvette.

Blow through and dont look back. Either C&S specialties or CSU, either one can build you a carb that will make that will make great power. Which procharger do you have?

**slow67** · 10-26-2011, 09:30 AM

Originally Posted by Hass828

Blow through and dont look back. Either C&S specialties or CSU, either one can build you a carb that will make that will make great power. Which procharger do you have?

X2. Prochargers HATE sucking through a restriction of any kind.

**OkieDave** · 10-26-2011, 09:51 AM

the procharger is S/N 70808. the air outlet is 4". all I know about it is my friend took it off his 502 chev. and he told me he had sent it in to Procharger for service and they told him it was in good shape. there is an intercooler with it. the intercooler has smaller air in and out than the charger.

**Budweiser** · 10-26-2011, 10:12 AM

Originally Posted by Hass828

Blow through and dont look back. Either C&S specialties or CSU, either one can build you a carb that will make that will make great power. Which procharger do you have?

+1

Although I have no first hand experience, everything I've read (including the Pro Charger website) say's the advantages of a blow through system far outweigh any reason to put together a draw through. My opinion, unless you have something that's already setup and functioning, blow through is the only way to go.

A lot of info here: TheTurboForums - Index
Check out the "Carburetor + Boost" section.

**IMPATIENT 1** · 10-28-2011, 06:29 PM

blowthru with a hat on carb

, not the carb box style

**gn7** · 10-28-2011, 06:38 PM

Originally Posted by IMPATIENT 1

blowthru with a hat on carb

, not the carb box style

Is this a flow thing? Other wise the only thing different is that the throttle blades are at equal pressure inside to out. But that can't be any difference in the carb calibration. I know the "hat" design can become critical to flow, so assume the box is a flow issue, besides being a pain in the arse.

**cyclone** · 10-29-2011, 08:50 AM

Originally Posted by gn7

Is this a flow thing? Other wise the only thing different is that the throttle blades are at equal pressure inside to out. But that can't be any difference in the carb calibration. I know the "hat" design can become critical to flow, so assume the box is a flow issue, besides being a pain in the arse.

Adjustments with the carb in a box are a pain.

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blow thru vs. draw thru with a Procharger and carb?

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