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SRT4/GT differences

 
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Old 23 May 2004, 06:41 pm
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Default SRT4/GT differences

Im sure this has been talked about before, but I flipped through the threads and didnt find anything. Ill try looking harder, but what is the difference in the two? I dont mean obvious stuff, but what makes the SRT so much faster than the GT. Boost level? ECU limit? Just curious. [:I]
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Old 23 May 2004, 07:14 pm
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Weight, gear ratios, and aerodynamics.....

Curb Weight for SRT-4: 2970 lbs
Curb Weight for PT GT: 3304-3311 lbs

Gear ratios for SRT-4 (T850 transmission):
Gear Ratios
1: 3.647:1
2: 2.045:1
3: 1.367:1
4: 0.947:1
5: 0.756:1
Final drive: 3.526:1

Gear ratios for PT GT (Getrag 288S Transmission):
Gear Ratios
1: 3.92
2: 2.21
3: 1.46
4: 1.11
5: 0.88
Final Drive Ratio: 3.29

Should remember the Getrag 288S was originally designed for the PT CRD Turbo Diesel.
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Old 23 May 2004, 07:32 pm
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Weight and aero I kinda figured that had somethin to do with it. So you are saying tha besides those 2 things, what holds the GT back is the tranny? Being that it is the same engine, I would imagine that a tranny swap can done on the GT to yield times/performance closer to that of the SRT4. Maybe?
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Old 23 May 2004, 07:40 pm
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Don't believe it's a feasible swap since the computers (PCM's)are different and your speedo and mileage might be way off if the switch is possible. Have to talk to an electonics expert to see if the PCM can be adjusted to compensate. But the lower final gear on the SRT-4 will certainly make it easier to scoot quicker a lot easier.
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Old 24 May 2004, 06:41 am
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Let me add a little more:

Weight, aerodynamics, factory support.

On the average car figure for every one hundred lbs. less it weighs, it will go one-tenth second faster in the quarter mile. That gives the SRT4 a .35 second advantage from the start.

Above 70 MPH the SRT4 will have a bunch less wind drag.

Mopar is bending over backwards to give the SRT4 group Stages 1,2, and 3. As to date they have not been as eager to support us.

Deen
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Old 24 May 2004, 10:55 am
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plus, i think the way the pt's undercarriage is set up, that playing around with the tranny is a tight fit. Don't know the details, but the cars construction and small engine bay have something to do with it.
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Old 24 May 2004, 03:17 pm
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Also the intake manifold is a little different on the SRT but weight would be the biggest issue IMHO. You throw 300- 400 #s out of a car and that will really help the quarter tremendously.
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Old 24 May 2004, 05:41 pm
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I agree with above but wouldn't intake and exhaust modifications and removing the back seats and spare get the numbers close in a quarter mile? I hear the arguement on drag, but I haven't seen the numbers, do any of you have them?
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Old 24 May 2004, 08:56 pm
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Quote:
quote:Originally posted by JPMS GT

I agree with above but wouldn't intake and exhaust modifications and removing the back seats and spare get the numbers close in a quarter mile?
Well, yes but this was you original question..
Quote:
quote:what makes the SRT so much faster than the GT. Boost level? ECU limit? Just curious. [:I][/purple]
We can start modding our cars to catch up but so can they.
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Old 25 May 2004, 12:25 am
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just a sie note every 7lbs is one hp in a drag race. so 400 lbs is like 57hp
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