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

problem after h/c install

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Old Mar 13, 2006 | 10:06 PM
  #1  
KyChad350's Avatar
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problem after h/c install

That's right guys, got it dynoed, and it put down a whopping 322 hp and 281 tq. Those numbers are correct, and im not lying. I think its the strongest it has every been, and yet im mad, disgusted, and ready to sell the pos.

The air/fuel looked good, timing was really close. The rockers adjusted, and it just would not pull. It's got a miss from i dont know where. the graph was all over the place. the cam fell flat on its face at about 6100. the car would lose power then just all of a sudden regain it. it would basically bog down, then take off. once the car is held at a constant rpm it bogged down then regained it. i know its hard to understand but it is also hard to explain. the car since its fuel is right sounds like the hotcam. the cc306 sounded better to me, my brother thinks so to. anyway, they are going to run a compression check on all cylinders then we'll go from there. its a wonderful day to be a lt1 owner.

i changed to stage 3 heads and put in the xe236/242. it doesnt look like there's vavle float either. just dont know...any ideas.
Old Mar 13, 2006 | 10:12 PM
  #2  
turbo_Z's Avatar
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From: Kansas
Re: problem after h/c install

Did you raise the rev limiter?

Is the opti new?

Did you check fuel pressure?

Can you post the graph?

How did the A/F look good... can you post the graph?
Old Mar 14, 2006 | 06:40 AM
  #3  
KyChad350's Avatar
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Re: problem after h/c install

rev limiter was already set at 6500, the opti isnt new, didnt check fuel pressure, but he a/f was good. i'll see if i can get a graph emailed to me then i'll post it.
Old Mar 18, 2006 | 03:56 PM
  #4  
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Re: problem after h/c install

heres the dyno graph.....


Last edited by KyChad350; Mar 18, 2006 at 04:02 PM.
Old Mar 18, 2006 | 05:42 PM
  #5  
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From: Costa Mesa, CA
Re: problem after h/c install

Do you have a way to datalog it? If you can, do this, hold the revs steady and log it while it bogs down and then comes back up again. Then log another separate one with you at wide open throttle pulling through second gear.
Old Mar 19, 2006 | 05:24 PM
  #6  
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Re: problem after h/c install

can i do this datalog with autotap.
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