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Old Apr 1, 2004 | 11:56 PM
  #21  
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Maybe just some practice, lower temp. and humidty? But i think you got the same mods i got but (pretty much) i have an A4 and you have an M6. M6 should be a little faster if its driven right. Right? I noticed a difference after i shaved the bump stop mod. Just a thought? Guess any little suggestions help.
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Old Apr 2, 2004 | 06:56 AM
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Originally Posted by blk~2000~Z28
How did you know that the O2 was bad? If you received a code from the front O2 after a missfire that is normal (at least I got some). When I had a bad plug wire my car would run like a$$ and it threw several O2 codes even though the problem was no spark due to the wire. You may have too much oil consumption and fouled a few plugs which intern got crap on the O2, enough to foul it up. Also like said above, I am pretty sure I fubared a few push rods b/c of miss-shift b/c 4th does not pull as hard as the day prior to the incident and has not since .

You could possibly be right.... the day before yesterday I reset the PCM to reset the SES.. and last night is when I got the codes scanned and the bad front 02 had already shown up.....
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Old Apr 2, 2004 | 07:01 AM
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I think one of your next steps should be to at the very least - check the gap/condition of the plugs. Then, maybe even a leak down test.

And yes, 106+ MPH is enough to run 12's... with enough hook. My old motor in my 86' 13.00'd me to death with high 102 MPH trap speeds. Now if I could only get the "new" car to leave the line that well.
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Old Apr 2, 2004 | 07:30 AM
  #24  
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Originally Posted by 86 IROC
I think one of your next steps should be to at the very least - check the gap/condition of the plugs. Then, maybe even a leak down test.

And yes, 106+ MPH is enough to run 12's... with enough hook. My old motor in my 86' 13.00'd me to death with high 102 MPH trap speeds. Now if I could only get the "new" car to leave the line that well.

I've pulled 2 plugs.. one from each side...



They seem to look pretty decent to me :shrug:

I think I might go pick up a new set of plug wires tonight... what fun

The plugs were just put in with the header install...
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Old Apr 2, 2004 | 09:22 AM
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If I'm reading this right, you have a lid, LT headers, and true duals and an M6. Shouldn't you by dynoing more than 333 RWHP?!?
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Old Apr 2, 2004 | 09:31 AM
  #26  
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Originally Posted by black_knight
If I'm reading this right, you have a lid, LT headers, and true duals and an M6. Shouldn't you by dynoing more than 333 RWHP?!?
Car is a 2000.. doesn't benefit from the LS6 Intake
The car dyno'ed 316 with Lid and Loudmouth,
after adding the LT's and True Duals it gained 17 Peak HP, and 27 Peak Torque, but gained over 20hp under the curve in some places and atleast ten from 2.5k - 6k , and almost 33 torque in others..

Once again, here was the before and after...


I have sense added a ported TB.
the dyno did not have wideband.. I am a little worried that porting my MAF after the dyno has my AF ratio screwed to the point where I am losing a good bit of power...


You have almost the same mods.. what did yours dyno?
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Old Apr 2, 2004 | 10:22 AM
  #27  
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I haven't had mine dynoed but I have seen the dynos of people with similar mods and they tend to range in the 350-360 rwhp range... (the 360 guy had the ls6 intake).

I sure hope I'm not dynoing as low as 333! I think you will do better with a fixed o2.
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Old Apr 2, 2004 | 10:25 AM
  #28  
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Originally Posted by black_knight
I haven't had mine dynoed but I have seen the dynos of people with similar mods and they tend to range in the 350-360 rwhp range... (the 360 guy had the ls6 intake).

I sure hope I'm not dynoing as low as 333! I think you will do better with a fixed o2.

I'd seriously be surprised if you got anything over 340... check around on the dyno's here for our mods...

Make sure they don't have pulleys.. ported TB's... and other little items that really add up.. and also.. my car is untuned.
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Old Apr 2, 2004 | 10:34 AM
  #29  
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I hear that pulleys are good for 1-7 hp or so, ported TB's are good for 0-2 hp. This really doesn't explain the gap between your dyno and what I've seen.

Remember headers are good for 15-25 hp (25 being on h/c) and true duals are good for 10 over most catbacks.

To do both those mods and only get 15 hp seems like a bit of a gyp! Granted, you got the gains under the curve that both LT's and duals are noted for, but I still think something's missing.

The answer is probably tuning, like you said. Don't be surprised if you gain 20 hp.
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Old Apr 2, 2004 | 11:06 AM
  #30  
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Originally Posted by black_knight
I hear that pulleys are good for 1-7 hp or so, ported TB's are good for 0-2 hp. This really doesn't explain the gap between your dyno and what I've seen.

Remember headers are good for 15-25 hp (25 being on h/c) and true duals are good for 10 over most catbacks.

To do both those mods and only get 15 hp seems like a bit of a gyp! Granted, you got the gains under the curve that both LT's and duals are noted for, but I still think something's missing.

The answer is probably tuning, like you said. Don't be surprised if you gain 20 hp.

also... I am throwing the P1153 code.. FUEL AIR METERING on Bank2 Sensor 1

Anyone know much about this code?
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Old Apr 3, 2004 | 12:57 AM
  #31  
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any other suggestions or experiences with my problem?
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Old Apr 3, 2004 | 08:27 AM
  #32  
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I can tell you one thing from looking at your plug, you really should look into some kind of PCV catch. You might want to pull your throttle body and check how much oil residue you have behind it also. That's one oily plug.
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Old Apr 3, 2004 | 09:45 PM
  #33  
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true duals usually have the same peak hp #'s as a good flowing catback. they pick up more under the curve though. his hp seems right. some free mods could squeak an optimistic 4 hp. the best way is mod-dyno-run, then mod-dyno run. now who has all that money ? im kinda in the the same boat. never seen a dyno or track. hopefully this summer. but im either going to impress myself or sell my car!
back to you, i think your problem may be in the maft and maft ends. these cars are real picky with those. also, are you ataping or someone watching a predetor while you drive? any k-retard? have you added weight to the car?(stereo or other toys?)
good luck. and keep us updated. to many times people ask ?'s and then never come back with the TRUE answers. with these answers we can all learn more and help out better! (ps. try a catch can also... maybee alot of oil getting in to the cylinders? weakning the charge?)
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Old Apr 4, 2004 | 12:46 PM
  #34  
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Originally Posted by ZDOG
true duals usually have the same peak hp #'s as a good flowing catback. they pick up more under the curve though. his hp seems right. some free mods could squeak an optimistic 4 hp. the best way is mod-dyno-run, then mod-dyno run. now who has all that money ? im kinda in the the same boat. never seen a dyno or track. hopefully this summer. but im either going to impress myself or sell my car!
back to you, i think your problem may be in the maft and maft ends. these cars are real picky with those. also, are you ataping or someone watching a predetor while you drive? any k-retard? have you added weight to the car?(stereo or other toys?)
good luck. and keep us updated. to many times people ask ?'s and then never come back with the TRUE answers. with these answers we can all learn more and help out better! (ps. try a catch can also... maybee alot of oil getting in to the cylinders? weakning the charge?)

Nope... weight is pretty much stock besides sub frames being added...
I could possibly borrow a predator or ATAP to see.. I suspect I was getting knock retard from the MAF ends leaning out the fuel mixture too far...
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Old Apr 17, 2004 | 09:59 PM
  #35  
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Just had the car redyno'ed.. pulled a best of 331/340 with an AF ratio of 13.5

Still low for my mods... :-(
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Old Apr 18, 2004 | 02:08 AM
  #36  
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post the graph dude
I wanna see your AFR
but honestly, some cars dyno differently than others. 331/340 is not too low for your mods. All you really have is headers, duals, ported TB and a lid.
Some cars dyno more than others. Just look at the lady on here to runs low 11's yet dyno's close to 300rwhp (a lil bit more)
Sounds to me its a driving/track condition error, or maybe that ported MAF was really screwing your times up that day.
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Old Apr 18, 2004 | 02:28 AM
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Originally Posted by onyxxtreme
post the graph dude
I wanna see your AFR
but honestly, some cars dyno differently than others. 331/340 is not too low for your mods. All you really have is headers, duals, ported TB and a lid.
Some cars dyno more than others. Just look at the lady on here to runs low 11's yet dyno's close to 300rwhp (a lil bit more)
Sounds to me its a driving/track condition error, or maybe that ported MAF was really screwing your times up that day.



This was right after I did the LT's... the mods were Lid, LT's and True Duals.




This was what I did yesterday... after I ported the TB, bypassed it. It hit 13.8 lean on that one run... :-/

Car also pops when coming down in the RPMS... and it has just started....
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Old Apr 18, 2004 | 02:39 AM
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Also... don't know if this will help. But since switching to 5w30 my car has been drinking oil.... 2 quarts in the past 3k miles... when before it never burned a drop. Could this be killing some power also?
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Old Apr 18, 2004 | 03:19 AM
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I would autotap the car while running a few passes, maybe you are getting some knock. Also, like the others said..ditch the ported MAF. Get some quality rear lower control arms to help with that wheel hop.
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Old Apr 18, 2004 | 03:34 AM
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Originally Posted by 14u2nv
I would autotap the car while running a few passes, maybe you are getting some knock. Also, like the others said..ditch the ported MAF. Get some quality rear lower control arms to help with that wheel hop.

Forgot to say.. the latest dyno was with stock MAF back in place, also having the car Atap'ed this week...

Atap won't tell me anything except if I really need tuning or not.. and tuning... god its pricey.
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