Building Chevy 4.3 liter V6 - 1994 with balance shaft
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(→TECH STUFF ABOUT THE 1994 4.3l V6) |
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'''HEADS''' | '''HEADS''' | ||
| − | Nothing particular there. Stamped rockers, pinched nuts on pressed studs. This will | + | Nothing particular there. Stamped rockers, pinched nuts on pressed studs. This will definitively be one of the mods. |
| − | At the moment I'm trying to figure if the heads correspond to L05 heads of the V8. They already feature the "ski-ramp" swirl ports (vortec) but not yet the kidney shaped combustion chamber. | + | At the moment I'm trying to figure if the heads correspond to L05 heads of the V8. They already feature the "ski-ramp" swirl ports (vortec) but not yet the kidney shaped combustion chamber. Further study and evidence indicate that I'm right on classing these heads. They do not flow terribly but should do the job. The only figures I came by for the exact casting numbers are low figure at 135 cfm and a higher number at 180 cfm. |
'''BLOCK''' | '''BLOCK''' | ||
Nothing particular there. A couple of threaded holes are not used according to the car. It seems that this is an engine still based on the GEN I smallblock-block. | Nothing particular there. A couple of threaded holes are not used according to the car. It seems that this is an engine still based on the GEN I smallblock-block. | ||
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| + | '''CRANKSHAFT''' | ||
| + | The crank is a cast even fire crank and has standard mains as a V8 small block but has bigger rod pins at 2.25" diameter. Unfortunately this excludes a lot of aftermarket rods from the list. The last bearing, oil pump attachment etc. are also the same as a 350 SBC. | ||
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| + | '''RODS''' | ||
| + | The rods are of standard lenght 5.700" but have larger big ends. Some confusion exists in the aftermarket as some manufacturers offer rods for the 4.3l V6 years from 1988 - 2007 but indicate 2.125" big end bores (crank pin diameter) which is not correct. The piston pins are press fit (heated) and will be changed to full floating. | ||
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| + | '''PISTONS''' | ||
| + | I found standard cast pistons with a dish measuring some 20 cc's with four valve reliefs and a notch. They will be replaced with forged flat top's and two reliefs. When measuring we found out that they are an additional 0.85 mm (0.033") below deck. | ||
'''OIL PAN''' | '''OIL PAN''' | ||
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