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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 01-29-2008, 08:27 PM   #11
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Quote:
Originally Posted by ice_qube
so even if i where to beef up my engine n add HP...ur tellin me my HP is limited as well? cause i dont plan on doing this right away.
The Bonneville has all the aerodynamic qualities of a Brick in flight. GM put the speed limiters on the ECM as insurance against an owner driving the car beyond the limit of the tires they equiped the car with at the factory. However, even if you do get past the limiter, you run outta steam shortly afterward in terms of top speed. (The stock motor just can't push it much faster)

I can't speak for the 92 and up models, but the 88-91 models also get a little squirrely in the tripple digit speeds. I did my run on a very, very long straight stretch of asphalt in rural Florida. I got it past where the limiter was, but it took a long time getting there, and past 100 it got really light on it'* feet.
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Old 01-29-2008, 11:17 PM   #12
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The light front end is helped alot by the front lower airdam on the 92-96 SSE/SSEi and th e97 and newer SLE and SSEi. It provides a little downforce, and keeps the air from getting under the car and lightening the front end. Tires make a HUGE difference as well. Weaker sidewalls grow the tire diamter at higher speeds, raising the car and making it worse. (remember that I have both front bumper styles to compare here in the driveway)

I've seen a huge difference between 3 different tire types on the car for that reason alone.
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Old 01-30-2008, 01:35 PM   #13
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Some of you are saying that just for the limiter is not worth it, but let me tell you a story...
Back in the days, when my brother & me had just gotten our first cars. (his a Buick & mine a 91 Bonne) We would race all of the time, when we would go out with our friends.
Now we both had the same engines, but I was allways better on the take of (I want to belive it was the driver & not the car ) but anyways, I would jump in front & stay there all the way up untill I belive 110mph when the limiter would kick in. then my brother would slowly pass by me with the car full of people all laughing & I used to be so pissed. So those few mph that he had gave him the edge & it couldnt have been more than 5mph more than me.
Now thinking back. I would have given anythyng to have had a chip in those days, & see my brother'* face afther a race on one of those cruse nights.
Now, I now that every ones case is diffrent, but in racing every bit counts, & going 115 instead of 110 might just get you a win.
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Old 01-30-2008, 01:38 PM   #14
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The topic author clearly stated only one reason for wanting the chip. The top speed limiter.
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Old 01-30-2008, 01:41 PM   #15
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one thing i also like to add about the down force and stuff.

my SSEi sit about 1" lower at the sub frame then my SE
so not only is the Body cladding helping but the whole car is lower to have better Down force at high speeds
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Old 01-30-2008, 01:56 PM   #16
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to a point. The lower car doesn't necessarily create more downforce. It just prevents as much air from getting under it.

To be specific, the FE2 cars will sit about 0.75" to 1.00" lower than the FE1 cars of the same generation.

For instance, Jseabert'* FE1 SSE (1993) sits about 3/4" higher than my SSEi and SLE. The installed height of the FE2 springs is lower.
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Old 02-03-2008, 03:12 PM   #17
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apart from the top speed limiter removal, what else will a chip do exactly? I was thinking of one for my car, but is it worth the money? I don't have a perticular reason like removing top speed but if it overall gives me more performance(and how much) then i'd probably consider it...
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Old 02-03-2008, 03:16 PM   #18
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I run one. Loved it since I installed it. Still do.

Richens it up a bit at WOT, slightly adjust shift points (which is what you want after pulley, intake, and exhaust), speeds up kickdown, allows a skip shift, buncha stuff I can't remember.

As usual, the supercharged cars will respond much more noticably from it than others.
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Old 02-03-2008, 03:27 PM   #19
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hmm sounds like a plan
The only thing is how to choose? Jet? GMtuners? I think probably ebay chips are the best....!!
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Old 02-03-2008, 03:29 PM   #20
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If the extent of your modding is pulley, intake, exhaust and cooler thermostat, the Jet is much easier and quite effective. The chip is designed for that mod list.

If you go GMTuners, you'll have alot of questions to ask, and may end up going 2 or 3 rounds before you get it right. He'll make no assumptions for you, you have to know exactly what you want.
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