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what the hell is wrong with my car?

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Old Apr 28, 2005 | 11:41 AM
  #1  
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Default i dont think these numbers are right.

260hp base?
280ish after a grand of parts\labor?
what the hell. 80k on the clock, A4 car.
Something isnt right. The dyno-dude said the numbers were about right for an A4, but looking around here, i see people with just lids making around 290hp on a MD.
This dis-hearts me =(
I guess i got a real factory freak. I guess i have the Shortbus LS1.
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Old Apr 28, 2005 | 04:59 PM
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The chokemasters could be robbing you of HP, esp with the headers. You may look into a different muffler. Also, the hookers generally don't get that great of gains. But if you got a 260 base, then added 20+hp after your mods, I would say that ain't too bad. You may get some better responses outta a different forum. I don't think this is the right forum...try the external engine section.
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Old Apr 30, 2005 | 10:10 PM
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Default the hell is wrong with my car

260hp base?
280ish after a grand of parts\labor?
what the hell. 80k on the clock, A4 car.
Something isnt right. The dyno-dude said the numbers were about right for an A4, but looking around here, i see people with just lids making around 290hp on a MD.
This dis-hearts me =(
I guess i got a real factory freak. I guess i have the Shortbus LS1.
Reply
Old Apr 30, 2005 | 10:27 PM
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both of my ls1 cars baselined at 276 and 278. you want to see something really dissapointing? when i had the 99TA, it dynoed at 250 rwhp!!!! hood was closed. yes the hood makes a diference. hood open went to 268 rwhp. then i changed plugs and wires. went to 278 rwhp hood open.

here's the dyno. dyno 2 is hood closed. dyno 4 is hood open. yes, the hood costs you about 18 rwhp. too bad we can't drive with it up!!! should dyno car with hood closed. that way you see the rwhp you will have going down the track. of course, no one would want any lower numbers, now would they?


then here's after the plugs and wires.
dyno 4 3rd gear hood open as above
dyno 5 new plugs and wires
dyno 6 150 n2o
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Old Apr 30, 2005 | 10:34 PM
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Acually, thats a good idea. from now on, i am going to get both open and closed hood dyno runs. My car isn't a dyno queen. A Dyno is a tool used to get a number for the performance of my car.
Not something to show off (not all the time =))
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Old Apr 30, 2005 | 10:39 PM
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we could get into the whole should we dynotune with the hood closed or open issue as well. after all, the hood cuts airflow to the inlet portion of the box. less air needs less fuel. the reason i dyno and tune with the hood open is to keep up with industry standards. people complain enough about low numbers. they'd have a field day with me if i came in here with lower numbers than what i have already. damn florida weather. now on the lt1 cars, it doesn't matter. they get their air from the left fenderwell.
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Old Apr 30, 2005 | 10:41 PM
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oh, i just saw yours are on a mustang dyno. it reads lower than a dynojet does. so, you have more than me. mine is a off a dynojet as you can see. remember, the industry standard is dynojet. got to remember that when you compare your numbers with others as well.
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Old May 1, 2005 | 01:31 PM
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yeah. i think it's like, 10-15%? (between dynojet and MD).
But, i'm happy with my numbers. i was just wondering if they were abnormally low.
Thanks man =)
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Old May 2, 2005 | 01:07 PM
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You're not too far off. It's really what it does at the track that matters though.
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Old May 4, 2005 | 06:40 PM
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Originally Posted by 02transhawk
The chokemasters could be robbing you of HP, esp with the headers. You may look into a different muffler. Also, the hookers generally don't get that great of gains. But if you got a 260 base, then added 20+hp after your mods, I would say that ain't too bad. You may get some better responses outta a different forum. I don't think this is the right forum...try the external engine section.
I have to agree with him here.......I had my car dyno'd and then I spent more money then I care to think about doing LT's and true duals and when my car was dyno tuned.....the hp & tq were THE SAME!!!!!!

Now, granted, they were 2 different dynos, but I was NOT pleased. They were also NOT Mustang dynos, for whatever that is worth. Then I went back to the place I got my pre-header/exhaust dyno at and saw an increase from 345/358 to 357/367.......and THEN I found out that the 1st time I dyno'd there they did it in "Standard" ratings instead of SAE which is what the dyno-tune dyno was done in as well as the 2nd dyno at the 1st place.

Were both your dyno runs done at the same place? Check your printouts, they should say on there somewhere if it is S.A.E. or standard.........but still, like the last guy said, a 20 hp increase isn't bad at all. I also think that a "real" catback is a better choice then just a Flowmaster muffler, but to each, their own.

Also, another thing to remember is this:

Dyno numbers are just that, numbers. The REAL proof of a car's speed is at the track..........my buddy picked up 7/10's after doing LT's, catted-Y, ported Throttle Body & a dyno-tune, so numbers on a dyno are not the end all answer to a car's performance. (I am sure he got better at driving in between the 2 runs at the track, but since they are his ONLY 2 times at the track, it was impressive nonetheless. Run your car at the track and see what kinda numbers she gets.........I know guys who dyno at 290 that run 13-13.1's all the time at sea level.
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