Procharger centrifical on a 300?

[bootleggers deluxe]

i'm looking at doing some mods to my daily driver 1987 F150 with a 300/4 speed ... i've got a set of long tubes, been kinda looking at cams, and then a Procharger fell into my lap for a screaming deal. now, i realize there are no brakcets available to mount it, but i can make brackets ... the question is, what else would need to be done to put this together?

I'm new to the world of superchargers, so someone please enlighten me ... i've been searching and lurking, but need someone to point me in the right direction...

 

[CNC-Dude]

If your running a carb, ATI sells a hat for blow-thru applications. Just some additional plumbing to go from the compressor end to the hat is about it. Should be pretty straight forward and basic and simple if you have moderate fab skills. You also need to get a pulley to fit on the balancer to spin the supercharger. The pulley size will determine the boost output.

 

[SoCar72]

The centrifugal SC's won't do much if anything for you on the bottom end, but will certainly boost you in the mid range and above since they rely on air speed through the compressor to build boost, unlike a positive displacement SC (Roots or screw-type) that creates boost by literal compression. However, your centrifugal will likely have the capacity to well out-boost a pos.disp SC once you get some engine speed going. You feel much at the light, but you'll feel on the highway.

Depending upon you intended boost level (ie. compressor speed) and your accessories, you may be able to adapt a later model serpentine belt system to run the SC. This may save to the effort of running a second pulley off the crank and potentially creating fan/radiator clearance issues. If you're looking to really turn up the wick, then definitely plan on second pulley system and possibly a cogged belt.

With mild boost levels, you may not need to boost reference the carb and fuel pump. ATI and Vortech both offer carb options for the 289/302/351w engines. A 289/302 boost carb should work well for you with perhaps a jet adjustment.

 

[StrangeRanger]

Give us a clue as to what year truck, whether EFI or carb and and the tranny type.

Depending on whether you have a Thermactor pump and/or AC, your biggest problem may be finding a place to mount it. Pulley diameters will be interesting. Because of the lower RPM limit, you will need a much higher overdrive ratio than a 302 but because of the smaller RPM range if you drive it too fast you can overpressure things pretty quickly. There's just way less room for error.

 

[bootleggers deluxe]

the truck is an 87 F150 ... EFI. I would like to keep it EFI for the sake of driveability. It currently is running a 3+1 (the 4th gear is OD) manual tranny, but am looking at a 5 speed swap. If it matters, it's got a 3.55 limited slip 8.8 out back.
the Smog pump has been deleted, and im on the fence on whether i want to keep the AC or not. It's currently inoperable, but this truck will serve as my daily driver ...

i'm not looking at doing anything crazy, i was going to TRY to adapt it into my current serpentine belt system ... i was also hoping to avoid intercooling it at this point ....

Please, help me all!!

 

[Turbo_B]

I am a huge fan of intercoolers. I ran my turbocharged MGB un-intercooled at first. at 7 psi I was seeing air temps in the 250 degree area! It was almost instantaneous! By intercooling the car, I was able to add over 10 degrees of ignition timing and my incoming air temps were almost ambient.

Do you have a compressor map for that supercharger? You should be able to determine the optimal RPM to spin it to get boost where you need it.
Boost levels with a supercharger are also dependent on the head restriction, so it may take some playing to get the right boost level.

 

[bootleggers deluxe]

Whats a compressor map??

im VERY new to superchargers ... as in this is my first outing.

 

[StrangeRanger]

Here are some sample compressor maps for Garrett turbos
http://www.turbofast.com.au/FlowTO4B.html
maps for centrifugal blowers would look very similar

Unfortunately for you ATI doesn't publish their maps. Apparently they don't want their customers to know what they're doing.

You need to decide how much boost you want to run then call ATI and ask them for your exact model of supercharger what RPM you need to spin the input shaft (NOT the compressor itself) in order too make that boost on a 300 CID engine. That they may or may not be willing to tell you.

Their recommended pulley diameters are likely to be based on a 302 V8 which revs to 6200 RPM, a speed which your 300 will never see so you are going to have to calculate and fabricate based on your RPM limits.