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Old 09-07-2012, 12:20 AM   #1
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AKA: michael
Join Date: Sep 2012
Location: springfield oregon
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Vehicle: 99 grand am gt
walker99 Gettin' there
3.4L internals

Have a 99 grand am gt, and was wanting to know exactly how much the stock internals can take. No one seems to make a steel forged crank for this, so what can i do to go force inducted? Can i turbo or supercharge this stock engine, and if i do how much boost can i go and stuff like that???
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Old 09-07-2012, 12:48 AM   #2
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AKA: Nathan
Join Date: Jul 2011
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Vehicle: 2001 olds alero GLS
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you can do anything you want.. there are quite a few people running around here with turbo, s/c, and even a new guy who has a rear mount turbo on his.
2001 | Alero GLS | 3400 | 6MT

2012 BMW S1000RR, full exhaust, BRENTUNE, power commander 5, dyno tune, 198WHP.
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Old 09-07-2012, 01:54 PM   #3
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Location: Portland, OR
Age: 42
Posts: 243
Vehicle: 2001 SCT with MP62
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The engine is mostly good, the weak link is the transmission, when I boosted mine, it seemed to be that most people said around 200-220 at the wheels is about the limit it can take for an extended period of time. I had mine tuned to around 205 at the front wheels, it could have made more but in the end the GA will never be the fastest car I own, so I was keeping it semi-reliable as its also a daily driver
2001 Grand Am, SC/T converted, MP62 blower
1993 Jeep Grand Cherokee 6 in lift, ARB locked, trail toy
1990 Pontiac Turbo Grand Prix (1 of 1500)
1994 Dodge Stealth RT Twin Turbo
2001 Mercedes SLK 230
2006 Mercedes E55 AMG
1969 Red Mustang GT fastback 351
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Old 09-08-2012, 09:22 AM   #4
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Join Date: Aug 2002
Location: Detroit area, MI
Age: 40
Posts: 12,231
Vehicle: 2000 Grand Am GT1 2dr
AaronGTR has made plenty of valid pointsAaronGTR has made plenty of valid points
There really is no solid number for how much power they can take. Not that many people have pushed them to their limit. They can take quite a bit of power in stock form though. The key is good tuning. If you detonate, it will break something at relatively low power levels. If it's tuned well you can make power safely.

The things most likely to happen with detonation and/or very high power levels are bent rods or cracked pistons. The stock pistons aren't super strong, but can handle around 400hp. The weaker parts are valvetrain related. The stock valve springs and timing chain are weak and need to be upgraded. The stock trans also won't take a lot of power without upgrades. It doesn't break... the clutches wear out and it starts to slip.
The few, the proud, the boosted!
13.788 @ 103.73 mph (3/2011) 320 whp and 300 ft/lbs torque. (3/2011)
See it here. the total package.
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