GT Performance Mods 2005+ Mustang GT Performance and Technical Information

I'm switching to SCT

Old Jul 27, 2005 | 12:36 AM
  #41  
SixtySix's Avatar
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Originally posted by don_w@July 26, 2005, 9:50 PM
You might want to verify that again. The most it can be is 6200 with the Predator. I wish I could set it for 6250 or 6300.
I'm just going by what the tach reads. It bounces right off that first incremental mark past 6,000 which should be 6,250. But this is a stock tach, so I guess I wouldn't put too much stock in it being dead nuts accurate.
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Old Jul 27, 2005 | 09:08 AM
  #42  
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Update:

To: 'cole'
Subject: 2005 Mustang GT Question

Cole,

I was reading a thread on a mustang forum and there was a discussion about torque management. Does your C&L 93 octane tune turn it off fully? I have a manual transmission car BTW. Thanks in advance.

His Reply:

Yes it does, the mustang predator for the 05 will remove the torque management in the base tunes.

What other modifications do you have on the car?



Thank you,



Cole Stevens

Diablosport LLC

1865 SW 4th Ave Suite D-2

Delray Beach Fl 33444
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Old Jul 27, 2005 | 09:21 AM
  #43  
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Originally posted by SixtySix@July 26, 2005, 9:03 PM
I have however moved the rev limiter to 7000 rpms. I do this so when I'm manually shifting the auto it gives me a little more of a fudge factor against hitting the rev limiter. That I like

Now once you already have a tune loaded, you should be able make parameter changes without having to unload or reload the tune?

I've made timing changes on my 91 Octane tune without having to unload it or reload it. All I've had to do is save my changes. Now I don't have a custom tune yet, don't have enough mods for it to be worthwhile.

Bill you have the JLT, correct? What happened to the DTP tune? Did you get that or try to go straight to a custom tune from someone else?
I thought the rev limiter setting in the Predator was just either on or off?

You've made timing changes and just been able to save those? How? I made fuel changes on mine but it was the same procedure as the initial upload but with the additional step of changing parameters before reflashing the computer. Am I missing something?

I had the DTP tune for the JLT...I found it had throttle response lag which the Diablo Performance tune didn't. My current custom dyno tune has excellent throttle response...and 10 more horses.
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Old Jul 27, 2005 | 09:52 AM
  #44  
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Originally posted by Redfire 05Gt@July 27, 2005, 8:24 AM
I thought the rev limiter setting in the Predator was just either on or off?

You can set the rev limiter for a specific rpm.
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Old Jul 27, 2005 | 03:59 PM
  #45  
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From: Cleveland
Yeah, the rev limiter is adjustable, the speed limiter is on or off.
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Old Jul 27, 2005 | 07:58 PM
  #46  
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Old Jul 28, 2005 | 09:01 PM
  #47  
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[SIZE=1]His Reply:

Yes it does, the mustang predator for the 05 will remove the torque management in the base tunes.

What other modifications do you have on the car?
<span style='font-size:8pt;line-height:100%'><span style='font-size:8pt;line-height:100%'>
Did you catch this. In the Base Tunes. I understanding with this is Predator base tunes only. I guess with C&L and others it does not so we may be flaming the wrong people. My car has a CAI tune.
There is a lot that can be said about what the people at DS leave out.
My problem is still there. No low end. There was some noticeable improvement today but it was also around twenty degrees cooler. Once more do not know what was responsible.
</span></span>
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Old Jul 29, 2005 | 12:06 AM
  #48  
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I was very happy with the base Performance tune in my generic Predator. Extremely responsive throttle and good low end torque. The tune I got for the JLT on the other hand had poor throttle reponse similar to stock, not as bad, but close. Not at all responsive like the base Diablo tune. The custom tune I just had done by a CMR dealer has great throttle response and very good low end power. I had my tuner look at my JLT tune before I told him how it was behaving. His reply after examing it was that there were things that he wouldn't do and there are things that he always does. He then asked me if my throttle reponse was poor, which tells me he knows what he's doing, 'cause I hadn't told him. After the tune, he said this JLT wasn't as bad as others he's tuned in the past as far as getting a smooth MAF curve, but still wasn't easy.
My test for throttle response is to get the car up around 2500-3000 in 3rd or 4th gear. Push in the clutch and let the revs drop to near idle. Then jab the gas pedal. I have almost no hesitation now the same as with the base Predator tune. The JLT tune had at least a .5 second delay and would rev kind of slowly, like the stock tune.

So Bill, I agree with you as I too suspect the CAI guys may be at fault here, unless we're missing something else..
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Old Jul 29, 2005 | 11:04 AM
  #49  
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Doug,

Are you talking about the Charge Motion Plates for mileage?

I was wanting to know about the Variable Cam Timing which if I understand it correctly should change the degrees of cam advance and cam retard in relation to crank shaft rotation. My theory is that this feature is what allows the '05 GTs to have the higher horsepower with out the loss of low end torque because of the dynamic cam adjustments.

Generally speaking I thought that some cams for the old pushrod engines allow a -4 degree setting for more low end torque and a +4 degree setting for more high end horsepower.

Disclaimer: I only know anything about this from Horsepower TV so I am in no way an expert.


PS I would like more information on these features if you do not want to post it in this thread please PM me or post a new thread in the forums and PM a link to me about it.

Maybe we should have some threads going into more detail, then some articles, on the benefits of the new engine features of the '05.

Thanks
James




Originally posted by Doug904@July 26, 2005, 11:54 PM
Not with the simple X-2, besides tuning the VCT has no affect on power increases. VCT is for fuel milage, thats it. I can go into more detail but only if it's so requested.

As for Torque reduction only being for auto's, that's not entirely so. The Manual PCM's also have it as do all 05's. On your stock program when you get near the rev limiter and feel the car die out, can you figure out what's going on? Also the engine has other parameters and calculations it uses to determine when Torque reduction should operate. Most of the time it's right when you don't want it to. :scratch:

Thanks, Doug.
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