LT1-LT4 Modifications 1993-97 Gen II Small Block V8

my new engine wtf. please help

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Old 07-24-2009, 11:28 AM
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Question my new engine wtf. please help

it falls on its face especially on the dyno, everything on the car is brand new, engine is new with ported heads,intake, big ol nasty *** cam with all the supporting mods, stall but stock 3.23 gear.

after 45oo it starts to fall on its face and break up it even has a new opti on it and still has the same problem. can this be a major valve train issue or what do you guys think need input badly this pisses me off...
Old 07-24-2009, 12:29 PM
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Sounds like what my new engine did on it's first test drive. Idled fine but stumbled like crazy and struggled to climb in the rpms.
Popped of the valve covers and readjusted my rockers with the engine running and it left hundreds of feet of rubber down my street when it was done.
Old 07-24-2009, 12:44 PM
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I would check valve adjustment, and maybe a fuel problem ... Have you tuned for the new cam and such..
Old 07-24-2009, 02:51 PM
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the car just got a base tune on it right now.ive taken it in and they say its either the opti or valve train.im going to look everything over this week plus get a gm opti ratherthan the brand new autozone opti/cap/rotor i got that ill sell for $140shipped 80miles on it.the fuel is right on point since he didnt mention anything like that.it really sucks because i spent over 6k and cant even drive the car.i really hope adjusting everything and putting in a gm opti is going to do the job.
if anyone one else has a idea please sure thank you
Old 07-24-2009, 07:01 PM
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the car spits oil when its full open throttle.its a brand new 383 12.8-1 le3 h/i/c.the machine shop that did the work is a real popular place down were i live so i know everything is set perfect & balanced
Old 07-24-2009, 08:17 PM
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Originally Posted by jan231986
the car spits oil when its full open throttle.its a brand new 383 12.8-1 le3 h/i/c.the machine shop that did the work is a real popular place down were i live so i know everything is set perfect & balanced
Just because a place is popular doesn't mean they know what they're doing, ESPECIALLY if it's spitting oil. If I were you, I'd take it to them and have them deal with it.




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