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Sedans Chevrolet Impala Chevrolet Impala Performance Upgrades?
21 messages, Last post on Jul 08, 2008 at 6:40 PM
You are in the Chevrolet Impala Forum. Your Hosts are pat & karens
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Hi there flyinlow35.. Welcome to the family and congratulations on your new arrival..!! You've definately got quite a beauty machine there. I know that we all have our personal tastes ,so I do have to be carefull here because the last thing I would want to do is hurt your feelings ..BUT, good grief man, WHAT IS YOUR THINKING HERE %%%%%%%%!!!!! The stock 5.3 SS exhaust note is one of the best sounding exhaust notes around in my opinion. Ya, sure there are louder Mufflers/ systems in various degrees i.e Dynomax, Magnaflow, Flowmaster, Borla, etc. etc. But remember , that sometimes louder can make it sound very cheap especially on an automatic. BE carefull here. My 2 cents...I would not go there at this point. Be content with the great rumble you currently have!! I'm quite sure that all the other SS guys (Ron, Bryan, Rob, etc.) will give you their input also once they read your post. As far as chips and headers are concerned..Ya there some around for the impalas..Look on ebay and some other impala sites. Some guys have changed their chips ,headers, and also intakes. Personally, I am just not confident that the so called perfomance chip gives the 25-35 horsepower gain as advertised. Anyway, keep us posted.... Later.... Frank 
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Replying to: mymitties (Mar 09, 2007 3:04 am)
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Replying to: colchester47 (Mar 09, 2007 3:26 am) You know, Bryan has made very excellent point here that I totally forgot about while making my emotional plea to you.. Thanks Bryan, and good morning to you to !! It's much warmer and sunny here in Toronto for a change. OH ,OH..carefull Frank. Flyinlow, Yes,..There would be absoleutely A HUGE warrantee issues here...!!!My experience with this is that you would be ok with only some changes after the cat. converter and sensors (i.e. ok to change mufflers, pipes, tips). But any mods ahead of that i.e performance headers, after market chips, intake manifolds etc. would be a BIG, BIG, issue with GM and warrantee coverage. Gee in some situations just the K & N filter can get you into trouble...Ya, be carefull Later...... Frank
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Replying to: mymitties (Mar 09, 2007 3:50 am) Aside from Frank's concern about ruining an already beautiful song by messing with the exhaust and all of our concerns over voiding a warranty, I would be careful because I believe the 5.3L has been detuned for use in the Impala because of drivetrain limitations. The same engine has a lot more power and torque in truck applications (RWD) so I think GM decided on the numbers we have based on long term reliability. My strong assumption is that if you do up the power, which I think can be done easily, you may cause problems with your tranny either sooner or more likely later. I like maxing out power as much as the next guy but don't want to give up reliability. Imagine going to a secluded stretch of road to test out your new enhancements and then being stranded when something breaks. Worse yet, you call OnStar to come to your rescue and after towing you home, they refuse to cover the cost because you've been tinkering under the hood. I don't know that it would go down like that (with my luck, it would) but it sure would suck. That said, it's your car and your decision. If you do go for it, we'll all be eagerly awaiting your report on your results. Good luck whichever way you go. Later... Ron |
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Replying to: quietpro (Mar 09, 2007 7:26 am)
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Replying to: cnw (Mar 09, 2007 8:59 am) Well, they'd never advertise it but I'd guess they have those abilities although (hopefully) not set up to work in a hostile way. In other words, they probably have the capabilities they'd need to know if you'd installed a performance chip by getting readings of fuel/air ratio, speed through direct uplink or through GPS, and they've been reporting lately about the "black boxes" on newer cars that store the last 10 seconds or so of vehicle data. I say they aren't set up to use this in a hostile way, as in shutting your car down for speeding or because your spouse is mad at you, because I think the public backlash would really hurt GM and other OnStar equipped sales. But, the capability is almost certainly there. It's a little scary when you think about it in today's world. You got me thinking...I wonder why the cops haven't started using OnStar's capability to limit those high-speed car chases? How long have you been retired? I'm a newbie...only since 1 Jan. 
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Replying to: quietpro (Mar 09, 2007 4:47 pm) I retired in July '94. Just short of 27 years. Clark |
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Replying to: quietpro (Mar 09, 2007 7:26 am) He was not so pleased though with the sound when it switched to 4 cyl mode. Yuck!
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Replying to: martin22 (Mar 10, 2007 11:29 am) I may have to drive a Charger again now so that I can compare the two.
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Replying to: quietpro (Mar 10, 2007 2:37 pm) Martin
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