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I have a pair of lightly ported '769 heads on my car now with 3500 valves installed. How much power am I missing out on vs the '487 heads I have? It's peppy the way it is now but I don't think it's all it should be. See my sig for the mods.
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Increasingly I find the difference between a "fact" and an opinion is the number of people who believe it.
3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, '769' heads with 3500 valves, LS6 springs & porting, twin T04E turbos, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle. -
Anyone? I have it apart right now and want to make a decision.Increasingly I find the difference between a "fact" and an opinion is the number of people who believe it.
3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, '769' heads with 3500 valves, LS6 springs & porting, twin T04E turbos, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle. -
I won't bother with 769 heads. The latest castings were much more consistent and flowed better stock vs stock.Ben
60DegreeV6.com
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I was searching for some flow numbers but couldn't find any. You think they're atleast on par with the later heads after a little work? I measured the ports on both and it looks like a .01" difference in port height otherwise they look pretty much the same.Increasingly I find the difference between a "fact" and an opinion is the number of people who believe it.
3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, '769' heads with 3500 valves, LS6 springs & porting, twin T04E turbos, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle.Comment
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NM, found some numbers. About 10 cfm difference stock to stock.Increasingly I find the difference between a "fact" and an opinion is the number of people who believe it.
3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, '769' heads with 3500 valves, LS6 springs & porting, twin T04E turbos, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle.Comment
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If you dont mind me asking, what are "769" and "487" heads?S10 Blazer 4.3, turbo LX9 in its future...Originally posted by Mars
No 60šV6 at the moment
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Different castings. '769 is older and '487 is newer.Increasingly I find the difference between a "fact" and an opinion is the number of people who believe it.
3.4 block converted to roller valvetrain with 220/225 cam on 115 lsa, '769' heads with 3500 valves, LS6 springs & porting, twin T04E turbos, 3500 plenum with ported 3400 lower & 'short star' 65mm throttle.Comment
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