MONTE CARLO "COPO" Monte Carlo SS - Turbosaurus Build (Swinging Dick Racing's c*ck got bent... she bounced a little too high & hard, & came down awkwardly)
- Thread starter motorheadmike
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Those are really expensive trap doors! http://www.improvedracing.com/oil-pan-baffles/trap-doors-for-oil-pans-and-fuel-cells-pack-p-38.html
But, yes - pop rivets.
Started farting around with the heads. Improving the CSA and flow a bit - I am not looking to become a human CNC machine. 8 intake ports roughed in.
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Well that escalated quickly.
All 8 intake ports done (might hit them with a cartridge roll for feel good flow). You can definitely tell I have never ported cylinder heads before.
All 8 intake ports done (might hit them with a cartridge roll for feel good flow). You can definitely tell I have never ported cylinder heads before.
These Castech heads are total garbage (the casting boogers were a fun find) - fortunately these pre-date the 2006 heads that tend to crack. I've done about a 70% solution on these - which will yield a 90% result for flow. That last 30% of effort will take as long as the first 70%... and I am not into racing flow benches.
By the time these are bolted back on and running, and packed full of oil, varnish, and carbon no one will even notice the blemishes. God knows it has no effect on their functionality.
EDIT: Future considerations...
https://www.summitracing.com/parts/fel-1160r041
https://www.summitracing.com/parts/fel-1160l041
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Mind officially blown. http://www.hotrod.com/articles/surprising-hp-numbers-stock-ls-cylinder-head-test/
I knew the 706 heads were good for a production head - but, not this good. May have to reconsider using 241s on the 4.8L. Plus, the 1.89" valves are lighter than the 2.00"+ units which can impact valvetrain stability at high RPM.
I knew the 706 heads were good for a production head - but, not this good. May have to reconsider using 241s on the 4.8L. Plus, the 1.89" valves are lighter than the 2.00"+ units which can impact valvetrain stability at high RPM.
Mike, that's why I chose to go with the 862 heads I pulled from a Suburban in the yard. They are essentially the same as the 706, just a different casting number. They flow great for a stock head, and should do well on my 5.3 with the dished pistons and boost.
Add in the BTR spring upgrade to tolerate the .613/.590 lift cam and it should breathe well!!!
Small ID spring shims are rare-ish.
https://www.alexsparts.com/hardened-shims-ls-series-1-250-x-510-x-060-shims/
https://www.alexsparts.com/hardened-shims-ls-series-1-250-x-510-x-060-shims/
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