LT1-LT4 Modifications 1993-97 Gen II Small Block V8

dyno sheet

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Old 08-02-2009, 12:48 PM
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Old 08-02-2009, 01:29 PM
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damn thats a crazy graph especially where its down on tq on the second run....and the a/f is way lean
Old 08-02-2009, 02:39 PM
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yeah i was wondering why it was so much lower on torque than the first run..what should the a/f be at
Old 08-02-2009, 03:15 PM
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i forgot to mention that he had to put another computer in my car because the one that was in it wasnt letting him make changes so he put the other one in and it let him download everything so we made the last dyno run on it and after that we took it out and drove it and the new computer wasnt working with the tranny for some reason from a stop i had to give it a lot more gas to move and it was shifting right it wouldnt even go into overdrive so he kept the computer they had different numbers on them also he was going to call someone about it..do you think that hurt my dyno numbers any on my last run
Old 08-02-2009, 05:55 PM
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Originally Posted by jays97 t/a
yeah i was wondering why it was so much lower on torque than the first run..what should the a/f be at
I believe 14.7 is considered to be the ideal ratio. what ai cam did you go with? thats def a weird dip you got going on there
Old 08-02-2009, 06:18 PM
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226/234 .569/.570 110lsa

do you think it needs to be revved a little higher than 6200
Old 08-02-2009, 06:48 PM
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Originally Posted by jays97 t/a
226/234 .569/.570 110lsa

do you think it needs to be revved a little higher than 6200
it doesnt need to be but I would, I'm going to be running mine limited to 6k for awhile until I can afford some nice RR's then I'm planning to get a 6600peg for the msd but only spin it to 6500.
I don't know much about autos but how much hp& tq should they lose over an m6? check out ELKYSS's dyno results in this thread, hes got the same cam> https://ls1tech.com/forums/dyno-benc...l#post11896074
granted we don't know all of either of your guys mods or dyno type, conditions etc but your not to far off compared to his tq #'s on ONE run but your hp is ~50 off on one run and ~60 on another
Old 08-02-2009, 06:53 PM
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A/F on motor should be about 13.5 give or take at w.o.t, so thats very high and wil run like crap and definately give you those numbers.........to be so crappy
Old 08-02-2009, 07:56 PM
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12.8-13.2 is supposed to be ideal for safe reliable power. 14.7 is considered the ideal stoichiometric ratio for low emissions.
Old 08-02-2009, 09:13 PM
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can they adjust the a/f with just the computer or does it have to be on the dyno
Old 08-02-2009, 10:32 PM
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You need a wideband o2 and you also need to adjust it under a load
Old 08-03-2009, 06:36 PM
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alright well i just talked to him today and he said the A/F was 15.1 when he was driving normal on the dyno and thats what it was reading right before he went WOT and it was 12.8
Old 08-03-2009, 07:42 PM
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A/F looks fine on the dyno chart so I'm not sure why everyone is saying its too lean. Do you know how much timing you're running?
Old 08-03-2009, 08:34 PM
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lol well no i cant remember right off hand im thinking he said 30 something but im not sure next time i talk to him ill get it
Old 08-03-2009, 08:44 PM
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you know ur right i just looked at the graph and it does show about 13 afr but he said 15afr so it got me confused
Old 08-03-2009, 08:53 PM
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im hoping to go to the track in 2weeks so ill see what a 313hp lt1 will get lol..a lot of people have been laughing when i say it only makes that much HP but they dont realize how much you lose from the auto if i get a 12.5 in the 1/4 ill be very happy



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