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  #46 (permalink)  
Old 06-28-2013, 12:29 PM
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Boy, I really wish you the best.

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Old 07-01-2013, 12:31 PM
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Just as a note on oil consumption, I just put 1280 miles on the 57 Chev with the 283 PowerPack. 3/4 of a quart of oil was used for the trip. This on a 25 year old stone stock rebuild with a 0.040" overbore now with 80,000 miles on it. The extra 100cubes that the 383's have over my 283 should use more oil, all else equal. But you'd think that the newer tech in the 383's should seal up better than a 283 with the crankcase vent tube.

Good luck with the 383's guys.

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Old 05-12-2014, 04:51 PM
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Just completed build on a 36 ford coupe with a zz383. Just finished break in with slightly over 1000 miles and I have oil concerns. Given the fact that I bought this crate some 6-7 years ago I doubt GM or the dealer I bought it from will listen to me. I note a lot of experiences in this thread. Question is whether there is a common problem. I may just buy cheap oil as I don't want to pull the engine or even go down from top or up from bottom.
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  #49 (permalink)  
Old 05-12-2014, 10:02 PM
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I break mine in using no breathers but instead two pcv valves. The object being to create vacuum in the crankcase. It helps the rings seat quickly. Ive been told this method can cause the main seals to prematurely fail though. I don't know if it does help but it didn't seem to hurt my engines. Do you suppose ethanol fuel has anything to do with your problem? It's a very long shot but maybe? I can't believe you're having this kind of trouble! GM must be slacking in the qc dept. Good luck and let us know what you find.
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Old 11-24-2016, 08:24 AM
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Air smith,
How did #3 turn out? Last winter, January of 16, I installed a SP 383 in my 78 z28. Consistently burns a quart every 520+- and does not smoke at all. Chevy Performance has agreed to replace the motor but the new version is back ordered. I'm #48 on the waiting list. I'm curious if you ever heard what caused the consumption issue and if #3 was good. Please message me if you wish not to post.
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  #51 (permalink)  
Old 11-24-2016, 09:26 AM
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Sounds like GM has a dilemma and knows it, but you're probably not going to get a response from the OP due to almost 3 1/2 years ago.
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gmpp 383 stroker, new 383 crate, new zz383, zz383 break in, zz383 oil

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