Quote:
Originally Posted by camerjeff
Those 2 posts do not match my experience, not saying that the posters are not accurately describing their experience.
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The stock 250's with the same mods would turn 5200-5400 rpm..
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Sounds like it matches pretty well to my experience with the 250.
The webbers make clean air flow into the head and your headers are pretty good long tubes. People under estimate the benefits of a good scavenging exhaust runner for overall engine airflow. I'm sure the air simply stall's out in my collector, then backing up into the stock dual exhaust manifold.
I have a set of PrimaTech headers, I may use one day, but I want to finish my small tube turbo header and use it first. I'm hoping between the cast intake, the headers, the turbo, and the re-ground cam for more lift and a bit more duration, I can get a few more rpm out of it. Oh, and now sending a head off to be professionally cleaned up. Maybe at some point I'll bolt it all onto a 230 short block to see how it behaves.
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"How I learned to stop worrying and love the OHC Pontiac L6"
The Silver Buick- '77 Skylark coupe w/455, SPX, MegaSquirt 3 & TKO-600 (Drag Week 2011, 2012 & 2015!)
1969 Firebird with a turbo'd Pontiac L6 controlled by a MegaSquirt 3 and backed with a microsquirt controlled 4L60e and 4.56 gears! (Drag Week 2018!)