do these dyno number seem right?
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do these dyno number seem right? 98 A4 z-28 camaro, 76,000 miles. tuned, shorty headers, 78 mm lsx intake, slp cold air, lower thermostat, changed rear end from 2.73 to 3.42, and installed a comp cam xtreme high lift 229-230 duration cam (2200-7200 rpm). 329.66rwhp (although did pull 331 with the air lid open) and 341.75 trq, ran it to 6500 rpm to test. i am having a serious intermittent tranny problem where it quick shifts through the first 3 shifts and wont rip even though it is wot? just wondering if this could have any effect on it, or are these numbers accurate?
Last edited by vike31; Jun 30, 2008 at 11:32 PM.
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I think that car definitely needs longtube headers. You're letting all that air in, but it's having trouble getting out. I'd bet it hit 365-370 with headers.
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i have the shorty headers, and when we put the tune back to gm stock it still did the same short shift. they managed to install the first cam wrong and scored the cylinders and messed up the valve train, but i am not pulling and SES codes...i dont know where to start now?
idk i made 370,390 torque, on a smaller cam and headers,on a gay 2 chamber blowmaster,before the cutout,and ls6 and now i made the 400's, but yeah, i didnt notice the shortys,but still the power was kinda low for, do you have a ORY,and what kinda catback you got???
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i have the shorty headers, and when we put the tune back to gm stock it still did the same short shift. they managed to install the first cam wrong and scored the cylinders and messed up the valve train, but i am not pulling and SES codes...i dont know where to start now?
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no y pipes, just left the retarded square tube on, i was curious if the shop that installed the cam could have put it in out of degree or something, it just doesnt seem to make sense when the guy programming it has a 01 A4-z and got 310 out of it stock
feel if they did the first one wrong,its possible they did the second one wrong,hopefully they didnt **** your valves up by doing the first cam wrong...well you are losing power by having that ypipe,which you are saying its the factory one right???all in all i still dont think the y pipe would cause you a loss of 50 or more hp i just dont....
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thats kind of what i am thinking too, they said they didnt munch any valves up but when they handed my the box of old stock stuff i was surprised to find a valve in it, when they first got the second cam it ran like **** and there was no compression on the 8th cylinder
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they were shocked too, it didnt add up. the tranny glitch made them wonder if that could drain some horsepower, but not that much they said. they had done a 99 the week before and it was 365 with a lot milder cam and stock intake