Be careful when you do put the metal on. Some of them protrude a bit further than the plastic and this can make belt replacement a bit tougher by reducing the clearance between the pulley and mount for the belt to slide past.

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97 Ei
97 GS
98 GS

I have to agree, No way the car is as efficient when you're running belt-less. It's just keeping your urges inline..

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Jason Z - Exposed Autos

2001 BMW 330i - Titanium Silver - Sport Package - 3 Pedals - Koni Yellow/H&R Sport
2006 Volkswagen GTI - (gone) Tornado Red - DSG, Stage II~280hp/325tq
1993 Pontiac Bonneville - (gone) Purple Pearl H4U/SLE. Loud

I have noticed that the SC rotors spin from the vacuum, even without the belt on. The engine sucks enough air to get what it needs.

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Andrew - owner/operator of Bonnevilles Unlimited

2004 Bonneville GXP | 60k | White Gold Tricoat | custom built supercharged 3800 hot rod | garage queen
1997 Corvette | 55k | Silver Metallic | Z06 wheels | Date-night Hauler/Parts runner
2014 Town & Country Limited | Cashmere Pearl | 95k | Family Hauler
2002 Ram 1500 Quad Cab Sport | Black| 260k | Official Bonneville Hauler

Aeroforce indicates it's taking 28 HP (IIRC) to cruise @ 70 mph.
7-9 HP to idle in park.

38 MPG average cruising @ 70 MPG with +35*F indicates there's good air flow too.

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DHP Powrtuner & Tech 2
1998 GTP Coupe
1999 SSEi 70k miles
2000 Silverado 2500 Ext Cab 4x4/6.0L/4L80E
2000 Trans Am WS6 LQ3 (LQ4 w/LS3 top end) 4L60E
2001 SLE
2002 Monte Carlo SS Top-swapped FSIC Gen V TOG's, Mezeire.....
2002 GTP 40th Anniv Ed Coupe
2004 GTP Comp G 'Bottom-swapped'

38mpg cruising at 70?!

When i first got my 00ssei which was like 4 months ago, i got it withoug a S/C belt. I was confused on why it was off and didnt even ask previous owner, so i just bought one ASAP and a new idler pulley. BIG difference, i just love thw wine. I think its bad not to have the belt on. You may see other improvments like mpg, but its better with the belt on.

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- Zin

*SOLD* 2000 SSEi | Midnight Blue Metallic | 120k
Supercharged decal 3rd brake light | Mostly stock| black leather interior | One of a Kind Tails | Custom SSEi Overlay | Painted Grille | Tints 20%(back) 35%(front)
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** NEW PIC's **----->: http://pontiacbonnevilleclub.com/forum/viewtopic.php?f=9&t=12985

On my 94 SSEi, the supercharger belt fell off and was shredded about 3 times. Each time before the engine overheated, I tried to see what it was like running without the supercharger. I equate the feeling to slightly better than my friend's 1986 Olds 98 with an LG3 3800. Since I replaced the cracked rear accessory plate about a year ago, this belt issue has gone away.

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94 SSEi - Project car
99 SLE - Tuned with different parts and such
85 Porsche 944 - Daily driver
68 Chevy C-10 - Free truck! Needs parts.

I have a 2001 SSEi, but 3 days after I bought it, I had the S/C idler pulley go on me on the way home from work. Completely stalled the car out, and I smelled something burning. I limped it home, and found the S/C belt was tangled in with the accessory belt. Was pretty nasty.

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- Greg | -- Project Prasinos -- |

1995 LeSabre Custom: 312K Miles | Custom K&N CAI | Edelbrock SDT Muffler | Camaro Tips | 180 T-stat | LED Interior
& Exterior | 20% Tint | PA Grill & Portholes | Limited Trim | GTP Rims | Ported LIM | Plus Many More Mods | Restoration Thread
2001 Bonneville SSEi: 225K Miles | Instense FWI | Intense MPS (3.4") | 180 T-stat | ZZP Plog | Ported Rear Manifold |
ZZP 3" Downpipe | Magnaflow Cat | Retrofitted HIDs | GenV M90 | GXP Brake Upgrade | 35% Tint | Plus Many More Mods |
2005 Bonneville GXP: 101K Miles | Custom FWI
2009 G8 GT: 89K Miles | 35% Tint | Roto-Fab CAI | SOLO Mach Exhaust | BMR Tunnel Brace | BMR Sub Frames | BMR STB |
Kooks Headers | QTP Electric Cutouts | BMR Sway Bars | Elite Engineering Catch Can | Innovative Dual Wideband Kit
1984 Caprice Classic Wagon: 86K Miles | Restoration Project

billboost i understand your concern and you are correct about the size difference but olblueeyes i can vowch for the metal pulleys i bought my 96 SSEi with 58K miles on it and the original owner was an old couple in their 50's. so car was kept in great dealer quality but it still had stock plastic idlers and tensioner pulleys. i replaced thoughs all on accessory and S/C belts and have since ran 85K miles on it with out a squeek squeel or rattle so head out get all metal pulleys

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Aerospace Propulsion Technician USAF
Airman First Class,
.:Michael Lyons:.

parts available on 96 see thread http://pontiacbonnevilleclub.com/forum/viewtopic.php?f=27&t=15185