GreenChevelleSS

I will be installing a procharger on my friends 89 Iroc and had some questions.

The procharger has a cog belt system on it and the crank pulley is 75 teeth, How many teeth should the Prochargers pulley have to run around 7 pounds of boost?

We will not be running an intercooler on it and the manual that came with it only shows the system with an intercooler does anyone have any pics of how they ran their tubing without an intercooler on a tpi?

Is a new computer chip required after the install?

Is a bigger or extra fuel pump required?

Are bigger fuel injectors required?

Anything you guys can suggest? Tips?

What all should be done to the engine and ignition and fuel?

Thanks Im trying to get everything needed before I start tearing down the car.

-----Danny-----

grover85

iTrader: (1)

Ok I think I can help you.
I have been helping a buddy put a procharger on his mustang all weekend.
At 7 lbs of boost you shouldent need a chip not a 100% sure but we didnt do this to the stang.
Are you running a fmu?
If you are yes an external pump is required. The reason why is if you have stock (19 lbs) injectors in your car you need major fuel pressure to make them work with an fmu. I'm talking 110 psi under boost. So you need an inline pump that can make that kind of pressure. Also a new in tank fuel pump wouldnt be a bad idea eaither. Like a 255 lph
Now you could probably ditch the fmu if you switched to some 36-42lbs injectors and a fuel pressure regulator with boost reference.
Do you have the intercooler?
I would highly recomend running it. You will get more power and efficency out of the charger if you do.

CRZYTRN-92Z28

As far as the cogs are concerned I dont know what combo he would need, but to give you an idea I run a 32 charger/77 crankk and see 14-15lbs of boost. As far as boost is concerned getting cogs for only 7psi is a little unnecessary. IMO.

Procharger recommends 24 lb/hr injectors with a 9psi setup so you probabbly would benefit from some larger injectors.

You dont need to re tune your prom but its definetly a good idea to maximize power.

Procharger also sells an external inline pump to go along with the FMU. Those are the only fuel upgrades you need to do. The stock in tank pump will work fine.

You can benefit from an aftermarket ignition system but its not required to make it run. Id recommend and MSD system.

Suggestions: Get a damn intercooler, boost is like crack and you cant run much more w/out an intercooler.

GreenChevelleSS

Well I dont have an intercooler and am starting to run low on cash to do it all so we would like to get it running with the charger before we get the intercooler and with that little of boost I dont think it would help all that much. We bought the procharger system used and it already had a cog belt on it from black mountain precision.
All we have for the install is a bunch of tubing, charger, air filter, blow off valve, and all the brackets, we do have some sort of fuel regulator but im not sure what it is ill have to get back with you on that one. The dude that had it before us ran it on a carburated engine.

GreenChevelleSS

How can I tell how much boost the charger will run? at what RPMS do you run the engine at to see how much boost the charger is gonna produce? cause doesnt it vary due to engine speed?

KS91Z28

It varies by engine. Different engines more air more efficiently than others.

GreenChevelleSS

That still doesnt answer my question though.

grover85

iTrader: (1)

Its going to depend on how fast the charger spins. The faster it spins the more air it will move. How much pressure build up (boost) will be dependent on how big of motor you have. Example. My buddies Mustang had a p600 procharger on a 347 ci motor. He ran the 22 lbs pully according to ati and he only saw 10 lbs of boost. It just came down to the fact that the charger wasnt big enough to move the air needed for 22 lbs. Also that 22 lbs pully was ratted on a 302.
Does that help alittle

GreenChevelleSS

What I want to know is how you figured out that your friend only was getting 10 psi boost cause like you said, the amount of boost varys due to how fast the charger spins, but the charger is ran by the engine so what RPMS are you running the engine at to get that 10 psi boost? The higher rpms of the engine the higher rpms of the charger the more boost is produced.

grover85

iTrader: (1)

Your right the more rpms more boost. It would hit 10 lbs at about 3800 rpms and hold that to about 5000 rpms if he went any higher he would throw a belt. But it built boost from 2000 to 5000.