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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 05-06-2007, 11:52 PM   #31
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I have pretty much kept to myself on this topic. I am a little biased because i ahve the powerlog and that is one reason i have sorta kept quite. But i have to say going from a stock manifold to the powerlog, i noticed a difference. Is there a difference between the powerlog and a ported front (properly), maybe a little maybe not. Here is a link to a test done by someone on clubgp, http://www.clubgp.com/newforum/tm.as...mode=1&smode=1 He gained power over a large amount of the powerband. Mainly because he lost KR, but none the less he gained a nice amount of hp. So there is good power to be found in the powerlog. After injector skewing i bet that guy picks up even a little more hp. So all in all, if you want to spend about 75 bucks just buy a PEM, nice gains and cheap, if you want to spend more then buy the powerlog, get a little more hp, save a few pounds (haha), and have even more power to be obtained if you decide down the road to skew the injectors.
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Old 05-06-2007, 11:55 PM   #32
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^^^

Thank you. Exactly my thoughts.
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Old 05-06-2007, 11:58 PM   #33
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and to add in.... The powerlog makes it alot easier to change the front plugs
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Old 05-07-2007, 12:17 AM   #34
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Quote:
Originally Posted by TJ'sblackbonne
want to spend more then buy the powerlog, get a little more hp, save a few pounds (haha), and have even more power to be obtained if you decide down the road to skew the injectors.
Down the road? In the meantime, your Plog is causing the front three to run lean, and the rear three to run rich. You start plugging up the cat, and are more prone to Kr on the front than the rear.

What'* the point in deliberately running lean on the front and balancing it with rich on the rear?

Think in terms of the way your PCM is thinking. For the average modder going after the 'free' or ' cheap' horsepower, the plog isn't a viable option IMO.
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Old 05-07-2007, 12:22 AM   #35
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i have been checking this trend also .stil not decided what to do but i know that front EM is bad and is easy to see those front 3 cylinder need improvement will all the testing whit should come up whit the best for the money hope so
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Old 05-07-2007, 12:40 AM   #36
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I hear you will. It makes since what you are saying. I also know i have to get my injectors skewed. For the average modder that isnt going to skew then yes i guess i have to agree, go after a PEM.
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Old 05-07-2007, 01:14 AM   #37
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kinda a stupid question but I feel it relates all this talk about the flow and such. if I remember correctly isn't the stock Dp on the L36 car a bottleneck anyway. so if you are flowing better up front and the rears great.wouldn't the dp also need to be changed in theory to achieve the maximum gain. that being said us in the bonnes are pretty much SOL when it comes to 2.5 DPs. again I am not trying to start any wars here just curious how it all relates if there is the equivilent of the ubend issue with the W bodies and the DP being our achieles heal if you will
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Old 05-07-2007, 01:19 AM   #38
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No u-bends in the Bonneville'*.
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Old 05-07-2007, 03:45 AM   #39
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I know there is none but what I am saying is does the stock DP since the ID reduced create a choke point similar to the Ubend
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Old 05-07-2007, 07:23 AM   #40
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Gojo,

It'* tough to say if the DP needs to be changed or not. And the size of the change would also be a factor. With PEMs on my L67, I changed the DP for better high end flow and moved my power curve away from the bottom end. While not gathering any scans and data, it was butt dyno noticable.

Then the question is.. how much reduced backpressure are we willing to give up, because backpressure at the DP is being seen as torque to a degree.
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