Like the title says I'm looking to improve my ln3 performance through supercharging. I guess my first question is, can it be done? And second if I can be done would it be worth it. This is not my daily driver so reliability wouldn't be a huge issue it just needs to be able to be driven hard for about ten minutes at a time.

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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

What harofreak didn't mention is that the L27 is the LN3 with a little bit better heads and intake setup. The ultimate option is to get a car that has a series 2 supercharged as a donor, and do a motor swap. Not only do you get 240hp out of the box, it is dead reliable once you get all the little bugs worked out. That is not even counting the aftermarket following for said engine. Many, with enough money of course, easily crack 400hp, and one member in a 2000 SSEi, which is heavier, set a daily driver record in a Bonne at 12.1 seconds in the quarter mile.

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~Randall~


1993 Buick Park Avenue - 197k - Some odds and ends done - Simply won't die
1994 Buick Regal - 78k - Bone stock - Always ready for a good kicking
1990 Oldsmobile 88 - Gone to a better place

As the post referenced above indicates: Yes, it can be done. No, it's not advisable because the Rods and Pistons were not designed to be used at the power outputs a blower adds to the base motor. As reliable as the LN3 is, and that's pretty *dang* reliable, it is still not rated for the same output as a stock L67.

If you are extreamly carefull, you can do it and the engine might live for a while. But you'll be listening for every knock, ping, and rattle wondering if the pistons & rods are giving up the ghost. The last fellow I remember doing this talked a lot about how reliable his top swap was...then he blew the bottom end out of the motor about 15-20k miles later, and promptly stopped posting about his success.

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Bye Bye 1990 Bonneville LE... Now it belongs to my daughter
In the Garage: 2009 Subaru Outback, 1987 Camaro, 2006 SV650S, 1995 Regal 182 "ASANAGI", 1962 Ford Galaxie 500, 1995 Ford F150 XL 4WD, 1953 Farmall Cub

Ok so if I find a series 2 s/c how tuff is that going to be to put it the car?

If you can get the complete drivetrain drop out, engine/trans/axles/suspension/rack... basically everything on the subframe, it should be pretty much a direct bolt in. You'll also need the wiring and PCM.

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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

Hmmm I'm kinda intrigued now..... If I dropped the cradle on my current car with everything on it does the series 2 cradle fit as well? Or do I still need to use my original cradle?

The whole cradle will bolt up, but you may find it easier to use a Series 1 supercharged in terms of the PCM and wiring.

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Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers

Correct me if I'm wrong but I've been told to stay away from the series one something about being more prone to limp mode.

I've been here since 2002, and own two of them. I've never heard of that. The 1995 Series 1 is actually slightly quicker in stock form than the 96 and newer on the 1/4 mile. They hit their torque peak at a lower RPM and have a larger diameter throttle plate.

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Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers

Um, I don't think they have a limp mode...

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Bye Bye:

RIP sandrock

Im just curious why you only wanna drive it for 10 minutes at a time?

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I race one of my bonnevilles and they don't last longer than 10 minutes. Thats all. Its called a bump and run we take streetable cars and strip them down and add a roll cage and other reinforcement. Then race them around a track. I should have mentioned that before haha Long story short I need more power to turn the tires I have and wanted to know about the super charging of an ln3 cause thats what I have

Is this like the 24 hours of LeMons? Could just turbo it and hope it all holds together...

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Bye Bye:

RIP sandrock

It is exactly like that except on dirt haha

Oh well yeah, I guess if it doesnt have to last. Hmmmm basically your options are open. is it just a one time thing or you gotta make it last a few weeks?

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Sounds like a short track with no long straights? You want a Series 1 hands down. They get into their torque and horsepower peaks much quicker than a Series 2. You'd never fully utilize the powerband of a Series 2 on a short track.

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Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers

A season is about ten races so I'd want it to last that long at least haha The only reason I wouldn't turbo charge is the lag time. The track isn't huge so I would need to be making boost right away to make it worth while. Would it be possible to swap some internals from a supercharged engine into my ln3? I guess by then I might as well get a series one and just drop it in place.

Just throw in a Series 1. You can find them in 92-95 Bonneville SSEi's and 91-95 Park Avenue Ultra's, and 95 Rivieras. The 94-95's make the most power stock.

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Bye Bye:

RIP sandrock

And the 95's have a lighter crank, making the rev quicker.

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Click here for mod list for both cars
93 SSEi, 95 SLE (supercharged) 97 Buick LeSabre Limited
PontiacDad at WCBF '04: Cruise control? That's like surrendering!
Comprehensive guide to troubleshooting, rebuilding, and modifying Eaton Superchargers