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

Fired up the 383

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Old 08-02-2006, 06:21 AM
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Fired up the 383

Been off the road since the fall and finally fired her up! Short block from VRE, LE2 heads, LE3 cam, pcmforlesss tune.

Good oil pressure, won't idle and is running a little rough, only ran it for a few minutes. I fired it without the torque converter since it is having issues. I'll have to start diagnosing before firing again since I want to break it in on the road under load.

Best place to start? Check & reset lash, TPS? Run for another few minutes and data log? Even though it only ran a few minutes I still changed the oil. No metal so that's good!
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Old 08-02-2006, 08:37 AM
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Re: Fired up the 383

Yep I'd check lash and all the sensor outputs, also look for vacuume leaks.
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Old 08-02-2006, 09:23 AM
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Re: Fired up the 383

Glad to hear she is alive and well Jeff

What lifters are in it, how much did you pre-load them. What rockers are you using?

Can you keep it running if you stay on it with the pedal or will it still die?
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Old 08-02-2006, 09:07 PM
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Re: Fired up the 383

Originally Posted by Nick@Victory Racing
Glad to hear she is alive and well Jeff

What lifters are in it, how much did you pre-load them. What rockers are you using?

Can you keep it running if you stay on it with the pedal or will it still die?
She's alive but not perfectly well.

They're the Comp OEM replacements with a half turn preload (with Comp Pro Mags, 7/16" studs). I know a lot of people run less preload, this was my first shot at it using the approximate Comp recommendation.

It will keep running if I stay on the gas, just doesn't sound too great. Let off the gas and it dies right away. I'm going to give it the once over on everything before starting it up again. I took this long making sure everything was right, no use rushing it now!
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Old 08-02-2006, 09:16 PM
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Re: Fired up the 383

Seems like with every rebuild comes gremlins you have to work out in the begining then all is well. I rebuild my Z about a year ago and then just got finished with my s-10 a couple of days ago. Same thing... gremlins. I just got it back together and now have to replace a lifter. Just once I want everything to work perfect the first time I turn it over.
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Old 08-03-2006, 01:42 AM
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Re: Fired up the 383

I use a 1/4-1/2 turn preload as a stamdard. I have found that Comp Pro-Magnums settle in after initial fire and will need to be re-adjusted but that typically takes care of everything.

I agree you've taken this long on it, why rush now.

-Nick




Originally Posted by Jeff95TA
She's alive but not perfectly well.

They're the Comp OEM replacements with a half turn preload (with Comp Pro Mags, 7/16" studs). I know a lot of people run less preload, this was my first shot at it using the approximate Comp recommendation.

It will keep running if I stay on the gas, just doesn't sound too great. Let off the gas and it dies right away. I'm going to give it the once over on everything before starting it up again. I took this long making sure everything was right, no use rushing it now!
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