mikey4410 Posted December 7, 2013 Share Posted December 7, 2013 As above guys.What do you think an n/a crank can take comfortably and is a turbo crank much stronger? Quote Link to post Share on other sites
Phil Posted December 7, 2013 Share Posted December 7, 2013 4efte crank has bigger counter weights. not the same. as for power, i dont know what it could take though id imagine any crap tune over 200hp will give it issues. Phil Quote Link to post Share on other sites
mikey4410 Posted December 7, 2013 Author Share Posted December 7, 2013 Counter weights bigger? Whats that achieve do you reckon? Quote Link to post Share on other sites
AdamB Posted December 7, 2013 Share Posted December 7, 2013 Depends what kinda build your doing, if its a stock build the crank would be the last of my worries. If its a forged motor then providing its static and dynamically balanced I see no reason why it can't take as much as a turbo crank. Quote Link to post Share on other sites
mikey4410 Posted December 7, 2013 Author Share Posted December 7, 2013 Why would u get the crank balanced because going forged.read sonewere that toyotas cranks are seriously hard to improve on balance wise. Quote Link to post Share on other sites
AdamB Posted December 7, 2013 Share Posted December 7, 2013 (edited) Lol back to that old chessnut. That's purely the engine builder/owners decision, but balancing the rotating assembly is one of the very few procedures I would personally take in building a motor. The list of machine work to carry out on an engine is quite defined and in all honesty I've not seen many people carry out half the things when building a proper blueprinted motor.List of things I would advise when building a motor:Crack test the block and headLine bore the main bearingsBore the cylindersCheck cylinder wall thicknessEnsure cylinders are 90 degrees to crank centrelineCrack test the crankshaftCheck crankshaft straightnessCrack test rods, if using stock items and shot peenBalance rotating assemblyThats all before you even get to check what size bearings you need or check oil clearances. Edited December 7, 2013 by AdamB Quote Link to post Share on other sites
mikey4410 Posted December 7, 2013 Author Share Posted December 7, 2013 Oh okies.i get you mate.cheers for input. Quote Link to post Share on other sites
AdamB Posted December 7, 2013 Share Posted December 7, 2013 (edited) Edited post mate.Cranks tend to last quite a while if the pistons and rods are lighter, along with not going too mental on the rpm limits, but most peoples turbos will run out of puff before the crank rpm becomes an issue.I'm sure RobH is still using the N/A crank and hes over 300bhp I think. Edited December 7, 2013 by AdamB Quote Link to post Share on other sites
Rob H@RCH Engineering Posted December 7, 2013 Share Posted December 7, 2013 As Adam says I am running a N\A crank in mine @ 230whp on forged internals works good for me but I'm only running quite a tame rev limit too. Quote Link to post Share on other sites
Chief Quimby Posted December 8, 2013 Share Posted December 8, 2013 Anybody have Picture of them both, they have the same part number Quote Link to post Share on other sites
AdamB Posted December 8, 2013 Share Posted December 8, 2013 I thought they were different, the 4EFE crank is marked 4E, where as the turbo crank is marked 4ET. Quote Link to post Share on other sites
maddox710 Posted December 8, 2013 Share Posted December 8, 2013 Whats about seels each end sorry for hijack Quote Link to post Share on other sites
Rob H@RCH Engineering Posted December 8, 2013 Share Posted December 8, 2013 The early N/A uses the 4ET crank and the later ones use the 4E crank mine is the 4E crank. The early ones are the same as the turbo cranks but the later 4efe used a different crank. going on this theres only the 1982 GT that has a different crank! 1999 glanza 13401‑11061 1982 GT 13401‑11060 1999 N/A 13401‑11061 1996 N/A 13401‑11061 Quote Link to post Share on other sites
mikey4410 Posted December 8, 2013 Author Share Posted December 8, 2013 Rob h u have nailed it.thanks so much for all inputs. Quote Link to post Share on other sites
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