headers tune/MPG
03-27-2011, 11:22 PM
#31
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Sorry man, but i'll have to disagree with you about the VVT stuff. We have a tuner down here that has been pulling 30-40hp/tq under the curve, I'm talking from 2k-4k.
LloydTX has had his trucked tuned by Said person and im sure he'd be more than willing to vouch for his work.
LloydTX has had his trucked tuned by Said person and im sure he'd be more than willing to vouch for his work.
03-28-2011, 11:17 AM
#32
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Yeah I know some guys have been able to tune them, but it isn't many at the moment. Those are impressive numbers from your guy tho. I really think vvt will be the way to go on some of these street motors, especially with boost. Most guys dont seem to like it from what I've seen
.
03-28-2011, 12:34 PM
#33
To say that I'm thoroughly underwhelmed by my tune(s) would be a HUGE understatement.
1/4 mile performance is at least 0.5 sec and 5 MPH short of what I expected.
On top of that my fuel "economy" SUCKS! Pre - headers and tune(s) I averaged 14 MPG on my daily stop-and-go commutes. Now averaging approx 12 MPG - same roads, driving style, fuel, and traffic.
I'm REALLY tired of spending my hard-earned $$$ on tunes!
Two thoughts / possible caveats:
Just prior to my first tune (and before headers) I swapped the OEM P275/55 tires for P305/50s. MUCH wider and heavier! Gotta be affecting aerodynamic drag a bit.
The #1 tube on my ARH headers is contacting my steering intermediate shaft at times. I've considered the possibility that could be causing unwarranted knock retard under acceleration, which would definitely have an adverse effect on economy and performance. Gotta check on that . . .
1/4 mile performance is at least 0.5 sec and 5 MPH short of what I expected.
On top of that my fuel "economy" SUCKS! Pre - headers and tune(s) I averaged 14 MPG on my daily stop-and-go commutes. Now averaging approx 12 MPG - same roads, driving style, fuel, and traffic.
I'm REALLY tired of spending my hard-earned $$$ on tunes!
Two thoughts / possible caveats:
Just prior to my first tune (and before headers) I swapped the OEM P275/55 tires for P305/50s. MUCH wider and heavier! Gotta be affecting aerodynamic drag a bit.
The #1 tube on my ARH headers is contacting my steering intermediate shaft at times. I've considered the possibility that could be causing unwarranted knock retard under acceleration, which would definitely have an adverse effect on economy and performance. Gotta check on that . . .
03-28-2011, 02:19 PM
#34
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To say that I'm thoroughly underwhelmed by my tune(s) would be a HUGE understatement.
1/4 mile performance is at least 0.5 sec and 5 MPH short of what I expected.
On top of that my fuel "economy" SUCKS! Pre - headers and tune(s) I averaged 14 MPG on my daily stop-and-go commutes. Now averaging approx 12 MPG - same roads, driving style, fuel, and traffic.
I'm REALLY tired of spending my hard-earned $$$ on tunes!
Two thoughts / possible caveats:
Just prior to my first tune (and before headers) I swapped the OEM P275/55 tires for P305/50s. MUCH wider and heavier! Gotta be affecting aerodynamic drag a bit.
The #1 tube on my ARH headers is contacting my steering intermediate shaft at times. I've considered the possibility that could be causing unwarranted knock retard under acceleration, which would definitely have an adverse effect on economy and performance. Gotta check on that . . .
1/4 mile performance is at least 0.5 sec and 5 MPH short of what I expected.
On top of that my fuel "economy" SUCKS! Pre - headers and tune(s) I averaged 14 MPG on my daily stop-and-go commutes. Now averaging approx 12 MPG - same roads, driving style, fuel, and traffic.
I'm REALLY tired of spending my hard-earned $$$ on tunes!
Two thoughts / possible caveats:
Just prior to my first tune (and before headers) I swapped the OEM P275/55 tires for P305/50s. MUCH wider and heavier! Gotta be affecting aerodynamic drag a bit.
The #1 tube on my ARH headers is contacting my steering intermediate shaft at times. I've considered the possibility that could be causing unwarranted knock retard under acceleration, which would definitely have an adverse effect on economy and performance. Gotta check on that . . .
03-28-2011, 03:08 PM
#35
Man Llyod, im really sorry to hear that. Sounds like you've really struggled with all bugs that poped up. I would say definetly get that header tube banging on the steering shaft fixed, could you possible clearance the area or extend the shaft a bit to keep it from making contact ?
Hate to keep harping on "poor ol' me" and my sluggish turd of a Sierra Denali, but it IS expensive to pay for two professional tunes and a set of damned expensive headers - and my truck runs just about the same as it did bone stock! Oh - it picked up about 2.5 to 3 MPH, but ET is darned near dead nuts identical. I'd like to try another tuner, but who to trust ?????
About that header tube contacting the steering intermediate shaft - gonna try loosening both motor mounts and see if I can't "jack" the engine over towards the passenger side - won't take but maybe 1/8" or so . . .
03-28-2011, 03:36 PM
#37
Is "Lew" building you a custom tune?
Believe it or not, in addition to my two custom tunes, I also own a DiabloSport handheld tuner I used until I bought my custom tunes. Kinda gave up on it since it's canned tune caused UNREAL spark knock on my truck . . .
03-28-2011, 03:47 PM
#39
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Thanks for the reply.
Hate to keep harping on "poor ol' me" and my sluggish turd of a Sierra Denali, but it IS expensive to pay for two professional tunes and a set of damned expensive headers - and my truck runs just about the same as it did bone stock! Oh - it picked up about 2.5 to 3 MPH, but ET is darned near dead nuts identical. I'd like to try another tuner, but who to trust ?????
About that header tube contacting the steering intermediate shaft - gonna try loosening both motor mounts and see if I can't "jack" the engine over towards the passenger side - won't take but maybe 1/8" or so . . .
Hate to keep harping on "poor ol' me" and my sluggish turd of a Sierra Denali, but it IS expensive to pay for two professional tunes and a set of damned expensive headers - and my truck runs just about the same as it did bone stock! Oh - it picked up about 2.5 to 3 MPH, but ET is darned near dead nuts identical. I'd like to try another tuner, but who to trust ?????
About that header tube contacting the steering intermediate shaft - gonna try loosening both motor mounts and see if I can't "jack" the engine over towards the passenger side - won't take but maybe 1/8" or so . . .