LS4 Performance Grand Prix GXP | Monte Carlo SS | Impala SS | LaCrosse Super

Ran a stock 300 c

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Old Mar 12, 2008 | 04:28 PM
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Default Ran a stock 300 c

We were prety much dead even from roll but I feel that he had a little more pull than me on the highway. He had no passangers and said copletly stock. I had 1 passanger and a cai w a flowmaster muffler replacement.


I did fine against him until I shifted into 3rd which seemed really laggy and that damn tcm enguagement sucked. I figured it would be a close race but I thought I would beat him. (we went 2 for 2).

What should be the next step to insure victory over the mighty hemi?
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Old Mar 12, 2008 | 04:30 PM
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5.7 or 6.1 HemiC???
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Old Mar 12, 2008 | 04:32 PM
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Originally Posted by bigboy3l
5.7 or 6.1 HemiC???
5.7 I would not even tried a 6.1
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Old Mar 12, 2008 | 04:36 PM
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even if you hung with the 300c thats cool; their 5.7 produces about 40 more hp and torque that our Ls4's and the probably weigh just as much a w-body too.
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Old Mar 12, 2008 | 04:38 PM
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Try it from a dig you'll beat him.
I have taken a Daytona R/T and Magnum R/T from Dig.
All I have is a CAI.

I know someone on here with a Monte took on a SRT8 and beat it.
I got raped by a dodge and GC SRT8.

I'd say DP and a Tune will help.
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Old Mar 12, 2008 | 04:42 PM
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300C 5.7 4096lbs
Impy SS 3790Lbs
MC SS 3490lbs
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Old Mar 12, 2008 | 04:50 PM
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Default srt-8 jeep

i was screwin around with a buddy on the highway who has a 06 jeep srt-8 (6.1 hemi) and from 70-135 he only pulled about half a length on me. maybe it was cuz its a box on wheels.
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Old Mar 12, 2008 | 04:58 PM
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Yeah on the Highway the 5000lbs Cube not much faster but from a dig it chewed me a new one. Thats what I get for challenging an awd truck. lol
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Old Mar 12, 2008 | 05:37 PM
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Originally Posted by bigboy3l
300C 5.7 4096lbs
Impy SS 3790Lbs
MC SS 3490lbs
Might have gave me a slight atvantage wo a passanger. That would have put me right with him for weight.

Car seems real sluggish in the 2-3 shift. Would you do the tuner or the shift kit to fix this? I do not want to do anything to void warranty.
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Old Mar 12, 2008 | 10:53 PM
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Originally Posted by fotoboy
Might have gave me a slight atvantage wo a passanger. That would have put me right with him for weight.

Car seems real sluggish in the 2-3 shift. Would you do the tuner or the shift kit to fix this? I do not want to do anything to void warranty.
Thats your problem you let it shift into 3rd lol. Even if you slightly let off the gas and don't know it that could cause the computer to shift into 3rd prematurely to your expectations. 2nd will hold all the way to 120 if not further i don't remember.
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Old Mar 12, 2008 | 11:04 PM
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Originally Posted by Sint3k
Thats your problem you let it shift into 3rd lol. Even if you slightly let off the gas and don't know it that could cause the computer to shift into 3rd prematurely to your expectations. 2nd will hold all the way to 120 if not further i don't remember.
When I run the car I drop it into 1st and the car will not shift until it hits its max shift point. You can drop it into 1st on the freeway and it will only go as low as it can wo redlining.
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Old Mar 12, 2008 | 11:08 PM
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I was the one who took the SRT8 out of the hole. I got got a good jump because he doesn't know how to do (fast car + big wallet doesn't = good driver) launch, and I sprayed a little .
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Old Mar 12, 2008 | 11:11 PM
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Originally Posted by fotoboy
When I run the car I drop it into 1st and the car will not shift until it hits its max shift point. You can drop it into 1st on the freeway and it will only go as low as it can wo redlining.
So does the Impala up-shift automatically? The GXP just bounces off the rev limiter when in tapshift mode - you have to shift manually.

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Old Mar 12, 2008 | 11:35 PM
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Originally Posted by TiredGXP
So does the Impala up-shift automatically? The GXP just bounces off the rev limiter when in tapshift mode - you have to shift manually.


yup, al by it self.
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Old Mar 13, 2008 | 12:21 AM
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Hm. So the vehicle will still shift in 2nd? it will go through the remaining two upper gears, correct?
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Old Mar 13, 2008 | 08:51 AM
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nooooo... it will not upshift automagically... you have to shift it up yourself...

dunno what he's thinkin/talkin about...

if you have it in 2, it'll shift from 1 to 2, but won't go into 3 or 4 until you manually upshift it...
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Old Mar 13, 2008 | 09:12 AM
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Originally Posted by 06MonteSS
nooooo... it will not upshift automagically... you have to shift it up yourself...

dunno what he's thinkin/talkin about...

if you have it in 2, it'll shift from 1 to 2, but won't go into 3 or 4 until you manually upshift it...
Yes it will, I have done it multiple times. Try it, drop it in 1st and floor it and dont lift off and dont shift. The car will do it by it self. My 96 Bonneville was the same way.
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Old Mar 13, 2008 | 04:01 PM
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foto is correct! if you leave the shifter in first gear, it will shift up to second gear but it will not go into third.
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Old Mar 13, 2008 | 05:16 PM
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Originally Posted by CTBSS
foto is correct! if you leave the shifter in first gear, it will shift up to second gear but it will not go into third.
I also went into 3rd leaving it in first. Ill double check that tonnight, not posative on that but 99% sure
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Old Mar 13, 2008 | 05:32 PM
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New to the group and I love it already. Just wanted to tell you guys I walked on a R/T Charger yesterday. And he seemed pretty pissed! We took off from the dig. We were dead even until about 60-65 mph and I started walking on him and he let up with his front tires even with my rear. I don't respect Dodge/Chrysler unless it says SRT on it now.
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