Selwyn Posted March 8, 2012 Share Posted March 8, 2012 I got 71 240z 1965 Chevelle (250hp)327 Chevy w dart heads. I wasn't sure how much rpm can it go. w dart heads do u think it could go like 6500-7000? Quote Link to comment Share on other sites More sharing options...
fastzcars Posted March 8, 2012 Share Posted March 8, 2012 (edited) that question is a little open ended. without more info. it depends on ALOT of factors. We need more info on the motor to even give you an intelligent answer. Edited March 8, 2012 by fastzcars Quote Link to comment Share on other sites More sharing options...
Selwyn Posted March 8, 2012 Author Share Posted March 8, 2012 Well guy told me it has Pete Jackson drive , polished n port dart heads n manifold , 3500 stall converter n 700vr trans, Mallory dis , 3 rows radiator, serpentine pulleys. Ithe motor s from 1965 Chevelle 327 (250)hp which it s 10:5 compression . If u were me n didn't get enough spec from guy tht doesn't know much, how much would u est the hp n rpm ability.. It has low vacuum 1hg .. Quote Link to comment Share on other sites More sharing options...
roger280zx Posted March 9, 2012 Share Posted March 9, 2012 I take the L79 to just over 6k, but it's got a hydrolic cam. That is a 350hp 327. Not sure what 65 you have but you need to find out what type of cam and pistons you have before you start over revving. Quote Link to comment Share on other sites More sharing options...
Selwyn Posted March 9, 2012 Author Share Posted March 9, 2012 I pretty much believe all stock except dart heads n manifold.. Is it possibly ? Quote Link to comment Share on other sites More sharing options...
rsicard Posted March 11, 2012 Share Posted March 11, 2012 Still need more specifics about the 327. It likely has FLAT TAPPET lifters. That in itself is a limitation. The valve springs are another limitation. Going to 6500-7000 RPM is not necessary to make good power. It is most dependent on Cylinder Heads, Camshaft, Lifters, Pushrods, Valve Springs and induction system. The dangers are the flywheel/flexplate, front balancer, connecting rods being out of balance or TOO WEAK to handle the strain at those RPMs. Going safely to those RPMs takes a complete internally balanced FORGED bottom end components, good balancer and flywheel/flexplate along with aforementioned items. Quote Link to comment Share on other sites More sharing options...
bjhines Posted March 14, 2012 Share Posted March 14, 2012 The 327 has a forged bottom end from the factory. Quote Link to comment Share on other sites More sharing options...
rsicard Posted March 14, 2012 Share Posted March 14, 2012 There are a number of aspects that should be considered when using USED parts. If there is a goal to spin the 327 to 6500-7000 RPM, then it would seem prudent to do a magnetic particle inspection/test on the crankshaft and connecting rods. The unknown may be the number of hours and miles on the bottom end components. It is not the cylinder heads that determine what RPM the engine can be spun to. It is the strength, integrity and balance of the bottom end. Quote Link to comment Share on other sites More sharing options...
johnc Posted March 14, 2012 Share Posted March 14, 2012 Well guy told me it has Pete Jackson drive , polished n port dart heads n manifold , 3500 stall converter n 700vr trans, Mallory dis , 3 rows radiator, serpentine pulleys. Ithe motor s from 1965 Chevelle 327 (250)hp which it s 10:5 compression . If u were me n didn't get enough spec from guy tht doesn't know much, how much would u est the hp n rpm ability.. It has low vacuum 1hg .. Please work on your grammar and spelling. 5. This site is based in the USA, and as such, text is to be written in English. There are web sites available on the web that can translate text from many recognized official languages to English, if you don't know it. (But then how could you read this? ) Gangster-slang, or any other cute, obtuse, street-talk dialects are not tolerated. Write in clear English that does not require a current knowledge of the latest street-slang. Text message or IM shorthand does not qualify as English. Always try to use proper punctuation, spelling AND capitalization. Quote Link to comment Share on other sites More sharing options...
Pyro Posted March 15, 2012 Share Posted March 15, 2012 (edited) With the right cam, valve springs, intake, and a short block in good shape, then no problem to rev a stock 327 or 350 to 7000 rpm for quick burst. (drag race). Not for extended time periods at 7000 rpm. Edited March 15, 2012 by Pyro Quote Link to comment Share on other sites More sharing options...
traeg Posted March 22, 2012 Share Posted March 22, 2012 I'm not so sure about a 327 being forged from the factory. but just make sure your cam, intake, and heads are matched up to the same RPM range so you will get the most bang for your buck. but to answer yes you can spin the motor that high but it may not make power that high. Quote Link to comment Share on other sites More sharing options...
SHO-Z Posted March 22, 2012 Share Posted March 22, 2012 For high RPMs 327 block and 283 crank = 302 Z28 engine. This was Chevys best high RPM engine. Quote Link to comment Share on other sites More sharing options...
Michael Posted March 24, 2012 Share Posted March 24, 2012 A mismatched combination with an unknown history sold by a neophyte (or cagy) seller... Maybe 5000 rpm usable redline and 5500 rpm never-exceed redline. Figure on 220 ft-lb torque and 170 hp. Quote Link to comment Share on other sites More sharing options...
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