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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 12-31-1969, 08:00 PM   #1
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WHY is this 2002 Impala I'm driving with the 3800 Series II SO MUCH SLOWER than my 1995 Bonneville!? Same motor. You would think the Impala is heavier. But I noticed that when I was driving too, cars my car can keep up with DUST this Impala. And stock time is almost 2 seconds slower!!! Something is very STRANGE.
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Old 12-31-1969, 08:00 PM   #2
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There is 2 available final drive ratios on the trans! Perhaps your Bonneville has one & the Impalla has the other? Pontiacs are built for speed, where as Chevs are built for luxury. The same applies to Buicks which are built with a softer suspension than any other GM product! Now before you all try to linch me...Some Chevs ARE built for speed (IE: Corvette, Camaro)!
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Old 12-31-1969, 08:00 PM   #3
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Tamara, I thought you said your car was chipped?
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Old 12-31-1969, 08:00 PM   #4
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Also the W-bodies such as the Impala have a U-bend in the exhaust...which causes them to lose 5hp/5ft-lbs.
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Old 06-06-2002, 02:48 AM   #5
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Quote:
Originally Posted by csprague
Tamara, I thought you said your car was chipped?
I THINK it is...because it dosn't shut off at the speed it'* supposed to. But I don't even know where or how to check for that. Asside from that, with this motor being newer, and in a brand new car, I was thinking it would be reallllllllllllllly fast. I mean it'* Ok for take off, but then the power compared to my car is pretty much null...where as my car is slower on take off and best power is between 60-140ish. The way this Impala goes, you'd think it had a 4 banger under the hood.
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Old 06-06-2002, 11:10 AM   #6
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Take a look at all the stats including the weight. I would also take into consideration tearing the whole thing apart and then you would know for sure whatí* up. Could be alot of power robbing units in a line including the computer. Fuel economy is a big deal nowadays. I would say the exhaust and the intake, combined with the ol mighty computer are the reasons. Think of it my chip released 20-25 hp. plus around another 10-15 with the exhaust. My personal favorite way to find out is to get the #rs on all areas of the engine that will give you a better picture. I bet you will find the tranny may be different or the computer controlling it may hold it back, also if ití* a rental it may be deprogrammed even more. Ask the rental guys.
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Old 06-06-2002, 03:40 PM   #7
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Speedyguy, what chip did you put in you car? And where in California are you, perhaps one day we can meet up and compare cars and knowledge. Plus, no chip has ever been proven to give any power. What a chip really does is tune the car to use all the modification together just like the stock chip makes all the factory components work together smoothly and effeciently.
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Old 06-06-2002, 05:29 PM   #8
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Youíre right on with the chip info. The guy I bought it from told me that it made a difference. I think ití* the rev limiter that is the real issue. I live in Fresno Kali, but I play in Riverside sometimes when visiting my father in-law. You live close to riverside donít you? Send me a private message if you want to hook up or talk business. I would like to put our ideas together to make some of these modification ideas happen faster. I have already talked with DeathRat and like I said this is all about getting the Bonneville on the map and our rides tricked out.
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Old 06-07-2002, 03:42 PM   #9
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Quote:
Originally Posted by 99BonnevilleSE
Speedyguy, what chip did you put in you car? And where in California are you, perhaps one day we can meet up and compare cars and knowledge. Plus, no chip has ever been proven to give any power. What a chip really does is tune the car to use all the modification together just like the stock chip makes all the factory components work together smoothly and effeciently.

99BonnevilleSE I e-mailed you, did you get it?
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Old 06-07-2002, 11:19 PM   #10
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No I didnt get your email. I will send you a private message.
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