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Statistics: Posted by sirdeuce — Tue Feb 20, 2024 7:00 pm
.050”? Is that for valve lift? Also wouldn’t the stock big port can duration be 240?
As for cams? I've had my best luck with 225-230 duration at .050" cams. For smog day adjust the cams to smooth the idle. Don't go too crazy with the portwork, it can send you over the edge.
Pushing things is the last thing I wanna do when handling with stock electronics. I know for a fact later down the line I want to get a new harness made and run a standalone. But that’s like WAY WAY down the line so at the moment I’m only focused on getting the motor built how I want it.
Doing a build that you want to pass cali's smog testing without issue and getting high numbers is quite a task, especially keeping the factory electronics.Be wary of the people that'll tell you to pump the compression to the moon and run 300 degree cams, those are the ones that don't have to pass California smog testing. OST is a good one to listen to, but I'm not sure if he knows how to pass smog. Stock electronics are the biggest hurdle. Best not to push it.
Statistics: Posted by ImpactEighty — Tue Feb 20, 2024 2:22 pm
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Statistics: Posted by sirdeuce — Mon Feb 19, 2024 9:50 am
I had already made a list for both builds and the parts needed to make it happen. I still have no idea on a decent machine shop in my area that will work with 7AG or 4A builds.
If your budget is correct, "3500-4000 $ budget" you will be tough pressed to build much. A 7AG would add a bit more as well. I'd recommend you start listing the costs of all you have mentioned, add in rebuilding parts (bearings, pumps, gaskets, and seals), and machine shop costs. If you are building a 7A version, add in the cost to acquire the short block. The money adds up quickly.
what would be the recommended CR for an NA 7AGE with smallport pistons and the 244 cat cams? I still wanna use 91 pump gas for the daily aspect of the build.
efficiency is the answer to both more power, and emissions compliance, you want to try and match compression ratio, and camshaft duration. Stock USA ECU has a rev cut @7500 rpm, so using a camshaft that makes peak power at 8000+ is inefficient. Also inefficient - not running enough compression with too much cam duration.
Statistics: Posted by ImpactEighty — Sat Feb 17, 2024 11:13 pm
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