very nice thread , i'll also join in
Reply By : rozzzzz on 8/18/2009 3:21:11 PM
and 1 thing to ask...converting a 4efe into 4efte do required changing internals..as i have seen on some forum saying both engine have diffferent internals..like connecting roads and gas kit .pistons etc
@rozzzzz
Sir 4E-FE and 4E-FTE are worlds apart from a performance point of view. while the 4E-FTE might look like a Turbo was bolted on to a normal 4E-FE but the truth couldn't be any more further from it , alot of meticulous attention was given to the internals of the 4E-FTE , because it has to bear the grunt of a Turbocharger, so as Turbocharging basics go firstly the compression ratio(CR) of the 4E-FE was lowered from 9.6-1 to 8.2-1 to avoid detonation, this was done by using slightly flat head pistons and using a thicker head gasket (1.2mm) the combustion chamber was same as the 4E-FE (combustion chamber volume=39cc's) as the same cylinder head as the 4E-FE was used alongwith same lift and duration camshafts as the 4E-FE , secondly slightly "beefier" conrods were used to survive all the 135 horses @ 6400rpm to a redline of 7200rpm , the fuel delivery system was almost identical to the 4E-FE with the exception of 295cc injectors in the 4E-FTE as oppsed to the 195cc injectors in the 4E-FE , to ensure that all the air provided by the Turbocharger has sufficent fuel to burn. also the crankshaft pulley had a harmonic damper instead of a normal crank pulley, to further ensure the longevity of the cranshaft by reducing torsional vibration. so thus the 4E-FTE is a stronger and powerful member of the E family of Toyota engines.
some pictures for reference.
(source Tecelonline.com and ep91.com)
4E-FE connecting rods
4E-FTE connecting rods
4E-FE and 4E-FTE side by side Con rod comparison
Crank pulley comparison