Bore and stroke ?
And what are the valve sizes? oem and aqftermaket?
What is the oem rod lenght? Are they all the same? 4.8, 5.3, 5.7, 6.0?
And are logher rods readily available?if so how long are they?
<small>[ July 11, 2002, 11:51 PM: Message edited by: 1320 ]</small>
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">
Vortec 4.8l 293.35cid Engine code: LR-4
Bore = 3.780” (96.01mm) Stroke = 3.268” (83.00mm)
Compression Ratio = 9.5:1
Factory Rated Horsepower = 270
Factory Rated Torque = 285
Vortec 5.3l 325.16cid Engine code: LM-7
Bore = 3.780” (96.01mm) Stroke = 3.622” (92.00mm)
Compression Ratio = 9.5:1
Factory Rated Horsepower = 285
Factory Rated Torque = 325
Vortec 5.7l 345.7cid Engine code: LS-1
Bore = 3.898” (99.0mm) Stroke = 3.622” (92.00mm)
Compression Ratio = 10.1:1
Factory Rated Horsepower = 350
Factory Rated Torque = 375 (equipped with manual trans) 360 (equipped with automatic trans)
Vortec 6.0l 364.13cid Engine code: LQ-4
Bore = 4.00” (101.6mm) Stroke = 3.622” (92.00mm)
Compression Ratio = 9.4:1
Factory Rated Horsepower = 300
Factory Rated Torque = 360
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The cylinder heads are interchangeable with some small differences in chamber and intake valve size.
Hope this answers your questions. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />
Richard
Are all the main journals the same size? Ie... are the cranks interchangeable?


