LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Fresh dyno numbers

Old Nov 22, 2006 | 10:48 AM
  #1  
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Fresh dyno numbers

http://i30.photobucket.com/albums/c3...yno_112206.jpg
bout where most guessed so im pretty happy.

comments?
Old Nov 22, 2006 | 10:53 AM
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Good numbers. JMHO
Old Nov 22, 2006 | 10:58 AM
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Good numbers, indeed. Now buy some heads and a cam! Lloyd Elliot wants your money.
Old Nov 22, 2006 | 10:59 AM
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Originally Posted by JakeRobb
Good numbers, indeed. Now buy some heads and a cam! Lloyd Elliot wants your money.
i wish i had the cash
Old Nov 22, 2006 | 11:00 AM
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did they honestly only take your car up to 5200 rpms?? Good hp for the setup, but I'd have guessed around 290tq.

Correct me if I'm wrong, but on most dynocharts the curves cross. Yours don't, lol, whats the deal?
Old Nov 22, 2006 | 11:03 AM
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beats me maybe someone else can explain
Old Nov 22, 2006 | 11:14 AM
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Originally Posted by 93redBirdMan
Correct me if I'm wrong, but on most dynocharts the curves cross. Yours don't, lol, whats the deal?
The two will cross at 5252 rpm. They didn't spin the car high enough. Also, I think that graph looks hideous. There are too many spikes and dips. Does the car run ok? You can't verify true peak numbers from a spike like that at the end. What is the deal with the dotted line in the a/f graph? Most of the time that is set at 13:1, but it looks to be more like 12.5:1. Your car is going pretty rich around the time they shut it down.
Old Nov 22, 2006 | 11:20 AM
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thats kind of a weird graph seeing your torque take a dip like that and then comming back up towards the beginning.....are you throwing any codes or anything?
Old Nov 22, 2006 | 11:21 AM
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Originally Posted by Sweetred95ta
The two will cross at 5252 rpm. They didn't spin the car high enough. Also, I think that graph looks hideous. There are too many spikes and dips. Does the car run ok? You can't verify true peak numbers from a spike like that at the end. What is the deal with the dotted line in the a/f graph? Most of the time that is set at 13:1, but it looks to be more like 12.5:1. Your car is going pretty rich around the time they shut it down.
yea runs good far as i can tell, good milage ect. sounded fine on the dyno. as far as ther rest of what u said . what might explain the graph?

might a tune help out? planning on getting one in the next month or 2.

Last edited by etex95; Nov 22, 2006 at 11:23 AM.
Old Nov 22, 2006 | 11:26 AM
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The first dip might be from the converter and the final spike might be from them letting off. I'd take the car back and demand another free pull. They should have definitely taken the car to 5600-5700 rpm. Also, make them start the pull from like 2000-2500 rpm.
Old Nov 22, 2006 | 11:26 AM
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I would agree, that's a hideous graph.
Either you have an issue between 3600 and 3800 RPM, or the dyno does. It seemed very inconsistent and a lot more bounce, which is typical in a car making less than 300 at the rear wheels, so I can account for most of the curve. the spike at 5100 RPM should not be there, and you really need to run the engine up to 6k before shutting it down.
I would also say your A/F ratio was running a little rich. What's the solid line vs the dashed line? I would assume dashed is what it thinks it should be and solid is what you were?


Really though, those are good numbers, you just need to get some kinks worked out and it will be a proper dyno graph
Old Nov 22, 2006 | 11:27 AM
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just thought of something. the tinnyest bit of steam was comming from somewhere round the tb. the car just got out of the shop a few weeks ago from overheating. maybe im leaking some coolant???
Old Nov 22, 2006 | 11:28 AM
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ill send them an e-mail to em and ask a few questions bout the graph
Old Nov 22, 2006 | 12:02 PM
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Apparently you didn't do a TB bypass---the steam you see is most likely the coolant coming from the rear of the heads and going through the body of the TB. Either a bad hose/connection going in or coming out of the TB.JMHO
Old Nov 22, 2006 | 02:49 PM
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back to the numbers...
how much more can i get w/o heads, cam, juice?
i dont want to get into that untill i have another car that i could use during the downtime.

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