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Butler Custom Procharger Kits
Pontiac V8 Butler Custom Procharger Kits
Boost on a Pontiac — Butler Custom Procharger Kits for Pontiac V8s
Butler Custom ProCharger Kits are the brackets, drives and hardware we designed and tested in house to hang an F-series ProCharger off the front of a Pontiac V8. Nobody mass produces a Pontiac blower bracket, which is why this is a Butler part number instead of a catalog item.
Four numbers cover it: complete cog drive and serpentine drive kits with the head unit included, and bracket-only versions of each for a builder who already owns a ProCharger. Every one of them ships with the BPI-1027 crank pinning kit.
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1. Cog Drive or Serpentine Drive
This is the first fork and it sets the ceiling for the whole combination.
| Cog drive kit, BPI-PCH-Kit-COG | Rated by Butler at up to 1250 hp. The toothed belt cannot slip, so ratio holds at the top of the run. It uses an ATI six-bolt drilled balancer shell and hub with a billet ATI hub adapter. |
| Serpentine drive kit, BPI-PCH-Kit-SERP | Rated up to 925 hp, built around a Romac balancer and a billet hub adapter, with newly designed brackets as of 2021. Quieter than a cog and plenty of drive for a strong pump gas combination. |
| Compression before boost | For pump gas 93 octane Butler suggests 8.75 to 9.5:1 on aluminum heads, depending on pulley size and boost level. An engine at 10:1 may reach that range simply by moving to a thicker Cometic head gasket. |
2. Complete Kit or Bracket Kit
| Complete kits | Billet Pontiac head block and mounting plate, an F1 ProCharger with hardware, the matching drive pulley, balancer and hub adapter, your choice of accessory drive crank pulley, billet spacer, ProCharger crank pulley and belt, tensioner, a 4150 carb hat and a blow off valve with ALM flange and T tube. |
| Bracket kits, BPI-PCH-Kit-COG-BRA and BPI-PCH-Kit-SERP-BRA | The same mounting hardware with no head unit or drive pulleys, for a builder supplying his own blower. The brackets are compatible with the P-1SC, P-1SC-1, P-1X, D-1, D-1SC, D-1X, F-1D, F-1A, F-1A91, F-1A94, F-1C, F-1R, F-1X and F-2. |
| The crank pinning kit is in the box either way | BPI-1027 is included with all four numbers. A blower belt loads the crank snout far harder than an accessory drive did, and a single factory keyway is thin insurance against the balancer slipping. The kit pins the crank and balancer with a 3/16 steel dowel without pulling the crank. |
3. What the Kit Does Not Cover
Read this before you build the car around the blower.
| Air conditioning | These kits work with an alternator and power steering, but not with AC. If the car keeps its AC, look at the TorqStorm serpentine systems instead. |
| Charge tube | Not included, because intake heights and routing vary too much to supply one that fits. Run an intercooler. |
| Balancer and crank pulley | The supplied balancer must be used, and the crank pulley has to be drilled to match the bolt pattern. |
| First generation Firebird | The kits fit under the hood of most Pontiac cars, but a 67-69 Firebird needs modifications. |
If you are still choosing a drive, call the shop with your target power, your fuel and whether the car keeps AC. Those three answers usually decide it.
Not sure what your Pontiac needs?
Email our tech team at tech@butlerperformance.com. Tell us your engine, heads, car, and power goal, and we will put the parts together as one combination that works.