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

Disappointed with new times.

Old Nov 12, 2004 | 09:38 PM
  #1  
ARG93Z28's Avatar
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From: Warner Robins, GA
Disappointed with new times.

Finally went to the track tonight for the first time since I put my Hotcam kit in over a year and half ago. The car has felt a little down on power lately, but I didn't think it was too bad until tonight. Most of my runs were in the 14.1@ 102 vicinity, and my best run of the night was a 13. 844@104 with a 2.21 60'. I know that's not stellar driving on my part, but shouldn't it be faster than that?
Old Nov 12, 2004 | 10:10 PM
  #2  
ChevyTuffD.A.'s Avatar
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Re: Disappointed with new times.

If u got that 60ft time down to below 2 you would run a mid 13. Other then that I cant think of anything. Get some good traction and then we can go from there.
Old Nov 12, 2004 | 10:22 PM
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Re: Disappointed with new times.

Trap speed is down an awful bit, Are you sure nothing is out of wack?
Old Nov 12, 2004 | 11:59 PM
  #4  
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Re: Disappointed with new times.

that seems not right if i can do that time at 7000 feet
Old Nov 13, 2004 | 10:44 AM
  #5  
ARG93Z28's Avatar
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Re: Disappointed with new times.

I'm pretty sure something's outta wack; I just don't know where to start looking. I have a miss at idle that a new opti and the delteq/plugs and wires didn't even phase. Nor did adjusting the rockers several times. Could that be indicative of a much larger problem than I thought it was?
Old Nov 13, 2004 | 10:49 AM
  #6  
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Re: Disappointed with new times.

Try a compression test.

delteq should have fixed it assuming you have new plugs
Old Nov 13, 2004 | 11:44 AM
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Re: Disappointed with new times.

Your car will not run right with the new cam until you get it tuned PERIOD! I highly recommend MadZ. I was running 13.17 @ 104 with bolt ons. I then installed an XE 224/230 cam and 2500 stall and was only running 13.11. After a custom program from madZ, (previously a hypertec program), I immediately jumped to 12.68 @ 109. After tweaking things more, I am running 12.30' @ 111. You have to get that thing tuned! Don't be discouraged yet. You do need to get some tires on that thing too!
Old Nov 13, 2004 | 12:23 PM
  #8  
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Re: Disappointed with new times.

His car is tuned. Sounds like some other problem to me. I'd also recommend doing a compression test.
Old Nov 13, 2004 | 12:38 PM
  #9  
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Re: Disappointed with new times.

May even be a broke valve spring. That woudl explain the miss.
Old Nov 13, 2004 | 01:54 PM
  #10  
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Re: Disappointed with new times.

Sorry,
I didn't read past the first part of the thread. I see that you have tuning done. It still sounds like an improper rocker adjustment even though you have tried re-adjustment several times. I think the earlier suggestion of a compression test is a good starting point.
Old Nov 13, 2004 | 02:15 PM
  #11  
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Re: Disappointed with new times.

Yeah...I did 13.9 stock...something ain't right!
Old Nov 15, 2004 | 07:51 PM
  #12  
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Re: Disappointed with new times.

change your fuel filter and check your injectors. they will definetly cause a miss.
Old Nov 16, 2004 | 03:40 PM
  #13  
ARG93Z28's Avatar
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Re: Disappointed with new times.

They're both new. I changed the fuel filter when the miss began and the injectors just recently.
Old Nov 16, 2004 | 04:04 PM
  #14  
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Re: Disappointed with new times.

You might try hooking it up to a diagnostic scan tool. I am running faster than that with stock internals and a DA of 5000+.
Old Nov 16, 2004 | 04:59 PM
  #15  
ARG93Z28's Avatar
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From: Warner Robins, GA
Re: Disappointed with new times.

I've got an AutoXray, but I can't find anything remotely out of the ordinary. It ran faster at the track after I removed the battery power for a few minutes, so I'm leaning toward a sensor of some sort. Today, when I was driving, I noticed that whenever the car was at idle or fully closed throttle at crusing RPM the left BLM quickly dropped to 108 but as soon as I got back on the gas it went right back up to around 128. What could cause that?
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