GMT 800 & Older GM General Discussion 2006 & Older Trucks | General Discussion

Hemi disapointment

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Old Jul 14, 2005 | 06:14 PM
  #21  
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Heat, humidity, elevation all are factors, you need to figure out DA to see what it would have run on a good day. I was at the track one time with my Silverado and it was running 15.2-15.5's, I thought WTF because I had run my best of 14.76 earlier in the year. Of course it was 107* on my first run and 93* on my last. The DA was 3200 feet, that translated into a 14.4xx on my 15.2 run according to the IHRA DA calculator. So the DA is a big factor.
Jim
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Old Jul 14, 2005 | 07:18 PM
  #22  
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yea you right heat can suck up up to 2/10's I hear.
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Old Jul 14, 2005 | 09:41 PM
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I got that Ram by the horns. I still have 40% of TM in my PCM program.
I'm also racing with the factory 20's.
All FI vehicles are held back by there factory PCM programs to an extent.
Though your still producing over 3/4 of the factory engine's power with a stock PCM program.
You will not gain but maybe 35-60 HP more at the fly with a custom pcm tune. Removing all TM will cripple the tranny in a short period of time.
The engine will be fine with all TM removed.
Also, your driveability will worsen. The shifts will be too violent all of the time.
Anyways, lets line'em up sometime!!

Jim
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Old Jul 14, 2005 | 10:50 PM
  #24  
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You will not gain but maybe 35-60 HP more at the fly with a custom pcm tune.
I'll take 35-60 hp from a tune any day! If it takes 10 hp to reduce your 1/4 time by .1 seconds then 35-60 hp is good for .35-.6 off my best time. Let's see, 15.24 minus .35-.6 is 14.89-14.64 in the quarter. I'll take it!
JIm
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Old Jul 14, 2005 | 11:06 PM
  #25  
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now that im driving like an old man i get 15.0 according to my speedo thingy.the last ticket got me scared!
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Old Jul 15, 2005 | 12:21 AM
  #26  
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Originally Posted by CHEVY6000VHO
I got that Ram by the horns. I still have 40% of TM in my PCM program.
I'm also racing with the factory 20's.
All FI vehicles are held back by there factory PCM programs to an extent.
Though your still producing over 3/4 of the factory engine's power with a stock PCM program.
You will not gain but maybe 35-60 HP more at the fly with a custom pcm tune. Removing all TM will cripple the tranny in a short period of time.
The engine will be fine with all TM removed.
Also, your driveability will worsen. The shifts will be too violent all of the time.
Anyways, lets line'em up sometime!!

Jim
Which FI vehicles are you talking about?
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Old Jul 15, 2005 | 12:40 AM
  #27  
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Maybe he meant fuel injected (FI) instead of forced induction (FI).
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Old Jul 15, 2005 | 12:47 AM
  #28  
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oh, that makes more sence now, I didnt know what the hell he was saying.
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Old Jul 15, 2005 | 10:27 PM
  #29  
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BeefTip-->Yeah, that's what the hell I was saying!! I'll make sure I do not abreviate next time just for you.
5.3 racer16--->15 mpg with a 5.3L???? You must not know how to drive. I get 17-19 in my truck. That's with the LQ9 6.0.
Your 5.3L should be getting 19+ mpg on average.

Jim
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Old Jul 15, 2005 | 11:49 PM
  #30  
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Originally Posted by CHEVY6000VHO
BeefTip-->Yeah, that's what the hell I was saying!! I'll make sure I do not abreviate next time just for you.
A little sensitive aren't we!
5.3 racer16--->15 mpg with a 5.3L???? You must not know how to drive.
Why the insult?
I get 17-19 in my truck. That's with the LQ9 6.0.
Is that around town or on the freeway? If that's around town, that's great mpg. What was your mpg before the Nelson tune?
Your 5.3L should be getting 19+ mpg on average.
Jim
My old 2000 Silverado with a 5.3L only got 15 mpg around town and 18-20 on the freeway so his mpg is about right.
Jim

Last edited by Ram4Pick; Jul 16, 2005 at 11:42 AM.
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