what is the proper output pressure for 1997 pontiac grand prix gtp

Asked by May 19, 2012 at 11:30 PM about the 1997 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

Question type: Maintenance & Repair

6 Answers

12,635

The stock pulley on a GTP's supercharger, which is an Eaton Model 90, measures 3.8 inches in diameter. This turns the supercharger 1.84 times the speed of the crankshaft, . This rotation of the supercharger pulley drives two impellers that compress the air and force it into the lower intake manifold as compressed air. If a smaller than 3.8 inch pulley (stock) is used, you increase the rpm thus increases the compression of the air inside your supercharger, called boost. Your stock pulley will translate into a maximum of about 7.5 to 8 (psi) of boost, whereas a 3.5" pulley will increase that to over 11 psi of boost. In terms of power output you can expect around 30 more horsepower and at least the same increase in torque. Caution though, turning the supercharger at higher rates can damage engine and drivetrain.

145

lol it produces 20percent vac while off the gas and 6 to 7and a half psi of boost when you are realy on the gas :)

12,635

I think you mean 20 inches of vac at idle.......

145

haha ^^ u know what i mean its a little bit of boost for being stock but im happy with it it was only producing 4 psi of boost when i bought it i had to fix all the vac lines

12,635

yeah I hear ya. I have a 98GTP. Just did some mods to it getting about 11.5 lbs now. Gets up and goes pretty decent now.....

5

I get half boost y is thath

Your Answer

Add photo

Related Questions

  • 1997 pontiac gtp brakes 2 answers

    What are some good break pads and rotors someone recommends for a pontiac gtp?

    1997 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

    -

    Maintenance & Repair

  • 1997 pontiac gtp 1 answer

    Where could I get a shift kit installed in a pontiac gtp and do I need a appointment?

    1997 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

    -

    Maintenance & Repair

  • is a Pontiac Grand prix 97 3.8l v6 w/o SC the same engine as the Grand prix GTP 3.8l With SC? 3 answers

    I have a 97 Pontiac Grand Prix GTP 3.8L SC and it Turned a Rod bearing and i was wondering if the 3.8l W/O SC out of a 97 Grand Prix GT will work in my GTP with my Supercharger? Is the block the same...

    1997 Pontiac Grand Prix 2 Dr GTP Supercharged Coupe

    -

    Maintenance & Repair

  • can you put a 2001 pontiac grand prix gtp engine into a 2002 grand prix gtp 1 answer

    I have a 2002 pontiac grand prix gtp with a blown engine and I was wondering if I could put a 2001 grand prix gtp engine into it.

    2002 Pontiac Grand Prix GTP

    -

    Maintenance & Repair

  • Pontiac grand prix gtp 2 answers

    How many of the limited edition GTPs were made in 2003?

    2003 Pontiac Grand Prix GTP

    -

    General

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 2,950 nationwide Grand Prix listings starting at $879.

ZIP:

Search Pontiac Grand Prix Questions

Pontiac Grand Prix Experts

#1 Js08016
Js08016
Reputation 4,070
#2 Tom Demyan
Tom Demyan
Reputation 2,700
#3 munron
munron
Reputation 2,110
View All

Related Models For Sale

Used Chevrolet Impala
619 Great Deals out of 29,141 listings starting at $789
Used Pontiac Bonneville
524 listings starting at $1,695
Used Chevrolet Monte Carlo
8 Great Deals out of 1,398 listings starting at $2,588
Used Chevrolet Malibu
811 Great Deals out of 88,339 listings starting at $1,900
Used Pontiac Grand Am
1,337 listings starting at $775
Used Ford Mustang
310 Great Deals out of 45,194 listings starting at $2,000
Used Chevrolet Camaro
150 Great Deals out of 35,530 listings starting at $1,995
Used Nissan Maxima
283 Great Deals out of 25,775 listings starting at $2,589
Used Pontiac Firebird
9 Great Deals out of 796 listings starting at $1,800
Used Nissan Altima
774 Great Deals out of 77,373 listings starting at $470

Used Cars For Sale

2008 Pontiac Grand Prix For Sale
11 Great Deals out of 421 listings starting at $2,495
2007 Pontiac Grand Prix For Sale
5 Great Deals out of 437 listings starting at $1,595
2006 Pontiac Grand Prix For Sale
3 Great Deals out of 443 listings starting at $1,999
2005 Pontiac Grand Prix For Sale
371 listings starting at $3,991