07-07-2009, 12:34 PM | #57 |
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Drives: Chevy SS Join Date: May 2009
Location: Hepcat City
Posts: 1,463
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I wonder if the A6 G8 GXP (I know it has a LS3 as opposed to the L99) suffers from this alledged slowness issue?
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Chantilly Lace, the 2011 Rockabilly Jukebox..ADM built..617rwhp, geared A6. |
07-07-2009, 01:05 PM | #58 | ||
Drives: 2006 Pontiac GTO Join Date: Jul 2009
Location: Kansas City, KS
Posts: 10
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Quote:
And besides, stuff not working efficiently is just a good excuse to mod and UPGRADE! I think a performance tune is in your future Quote:
haha, thanks. I'm definately no expert though, I just picked up on info in figuring out what I've broken on my cars over the years. I actually became intimately familiar issue with KR issues when I got my Grand Prix GTP, which are KR monsters. Fortunately, the GTO doesn't have nearly the same issues as the GP, though it can still be a factor. Assuming everything working right, I'd expect a 400hp engine to be putting down about 340-345 rwhp on a dyno, so something is definately up with your car only making 305 (that's stock 5.7 LS1 territory). Rule out the easy stuff (gas) and move on from there. |
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07-07-2009, 01:14 PM | #59 | ||
Booooosted.
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My fear is that I do some mods and could have even gotten BETTER performance had I fixed the initial problem. |
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07-07-2009, 01:42 PM | #60 |
Drives: 2010 Camaro Victory Red 2SSRS Join Date: Oct 2008
Location: Arizona
Posts: 157
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Although my car doesnt seem to have performance issues (2SS A6), I'll admit its been a long time since I've driven a V8. So I might be wrong. I'd have to test it at a track to be sure. But right now I'm still in the break-in period and babying it.
However I will say that I've had some issues with the car making a knocking or pinging noise occasionally from the engine compartment. At first I was concerned that maybe it was something to do with the oil, but I checked it and it was full. So I think the issue has something to do with bad gas. I've been filling up at Cheveron a lot and regardless where I go I've been getting premium. I can only find 91 where I live. It's also hot here (110). In any event I'm going to use a different gas station chain to see if it resolves the issue. If not I'll mention it when I take the car in for the first oil change at 1500. |
07-07-2009, 01:59 PM | #61 | |
Booooosted.
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07-07-2009, 02:58 PM | #62 | |
Booooosted.
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For example. Take a car a with 400 HP engine. If it were to lose say 20% form engine to wheels and measure 320 HP on a dyno. Then same car, same engine may lose more HP to the wheels due to heavier wheels and maybe dyno out at say 25% loss and end up with only 300 HP? Would you say this is correct? |
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07-07-2009, 03:09 PM | #63 | |
Drives: 2006 Pontiac GTO Join Date: Jul 2009
Location: Kansas City, KS
Posts: 10
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Quote:
What actual amount is lost is hard to say (I have no concrete insight on that issue). Although I doubt that bigger wheels alone are enough to make a car that "should" dyno at about 340 have 35hp less. I'm not that knoweledgeable about Camaro options. Are the wheels you have a factory appearance option, or are they aftermarket on your own? 21" is a pretty big wheel regardless. I think the easiest practical steps you can take to pinpoint the issue are: - if you still have them, put your stock wheels back on and see if there is a difference - find someone local with a tuner that can scan your car while driving (if all else fails, go to ls1tech.com and check the regional sections), then you can tell for sure if KR is holding you back. If it's not the wheels or KR, next culprit would be either over-aggressive torque management in the auto trannys or the DOD doing funky things, although I'd assume that this issue would be more common if either of the above were the case. I do know that tuners of previous gen DOD engines just turned theirs off to never deactivate (I'm talking the recent Impala SS's, other LS4 models, etc) |
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07-07-2009, 03:35 PM | #64 |
Drives: 2010 1SS A6---1968 SS Camaro Join Date: Jun 2009
Location: Indy
Posts: 102
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GM claims the 4.7 to 60 with the 20 inch wheels............
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2010 Camaro SS A6
http://www.indycamaro.com 1968 Camaro SS 396 512 CI BBC producing 653 RWHP @ 6400 RPM |
07-07-2009, 03:55 PM | #65 |
Drives: 2007 camry Join Date: Feb 2009
Location: Houston
Posts: 20
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ethanol would not make a problem since some race cars convert to alcohol rather than gasoline....also why they make a methanol/water injections systems to stop your car from running lean mostly for FI cars. also if it was a KR problem you would probably see more 6 speed cars having the problem....i think its a problem with the torque management or computer tuning
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07-07-2009, 04:01 PM | #66 |
Drives: 2005 Cobalt SS/SC Join Date: Nov 2008
Location: Wilson, NY
Posts: 214
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if anyone has this problem and is in WNY, contact me, I'll hook up HPtuners to your car and scan it to see what is going on. There will be no charge cause I'm just scanning. So if I can help anyone let me know. Let's find out whats going on.
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07-07-2009, 04:17 PM | #67 | |
Drives: aqua 2ss l99 Join Date: Jun 2009
Location: Edmonton
Posts: 1,215
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rotating mass robs torque. |
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07-07-2009, 04:19 PM | #68 |
Drives: C6 Zed-oh-six Join Date: May 2009
Location: Buffalo NY
Posts: 677
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Im in wny but no complaints with mine
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07-07-2009, 04:59 PM | #69 | |
Drives: 2006 Pontiac GTO Join Date: Jul 2009
Location: Kansas City, KS
Posts: 10
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Quote:
Most likely because cars that are set up to run ethanol/alcohol are specifically tuned to do so. Also, there have been numerous reports of "customer goes to get dyno tune on tank of 10% ethanol blend, has KR and disappointing results. customer switches gas brand to non-ethanol blend, and picks up 15 more HP and no KR with no other changes." I've heard too many of these stories to discount it. |
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07-07-2009, 05:39 PM | #70 |
Drives: 2010 1SS/RS L99 Join Date: Oct 2008
Location: Detroit
Posts: 145
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ok so i read it normal for cars with lower miles to feel slow? (i got my car a few days ago and only have 200 miles on it, a Auto 1SS). If so, how much actual power difference do you feel when you finish the break in? And even though im not supposed to , i have kind of been friving with a heavy foot. will this hurt performence in the future?. thanx
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