Been watching your vids, and started applying some of the things you are doing to my 383 sbc, damn near identical cam specs to your asa. The lightweight clutch and flywheel has me chasing the same thing in my 91 c4. The zf transmission makes an obnoxious gear rollover noise at idle and low load cruise. Just wanted to say thank you very much! I've learned a lot from the few vids of yours I've watched.
And the deeper I get into tuning, the more respect I've gained for the factory engineering and tune. That level of refinement is not easy with a performance cam and stand alone efi system. Big learning curve for sure.
Just some additional advice. Do everything you can using the base tables and the method Holley intended. The advanced tables are really bandaids. I don’t feel like I stressed that enough in the video. Thanks for watching you and if I can help just let me know.
Great video, I was thinking about doing this with my manual transmission 408. How do you think the low timing affects fuel economy and engine temperature?
If you do it this way the only time the timing is low is when you’re out of the throttle. As soon as you have decent airflow the timing comes back in and so even by definition we’re pulling timing out when the engine is effectively misfiring. So in short I don’t think you’ll see any influence on temperature at all. I’ve had no adverse effects after months now of driving
Love the videos. Great channel. I’ve got a situation w my 415 LS stroker. Cam is 289/305 .624 static compression 11.76:1. Holley dominator. Ok here goes. I had a fast lsxr intake manifold on it and I saw cranking pressures of about 190 psi per cylinder. I recently installed a dual plenum manifold w twin dbw 102s. And a double roller chain set. I also upgraded the injectors to sep 1500s. Now my cranking pressures are 230-240 psi per cylinder. I run 93 and am now scared as hell of knock. What could have done this. The only thing I can think of is perhaps the cam gear being mismatched from where it was previously. Any suggestions?
Cranking pressure doesn’t mean a whole lot to me honestly. Depends if the throttle is open or not and when the intake closing happens is very important. That is aggressive compression though for pump gas. Just keep the timing safe and a cold set of plugs in it.
Switch to e-85, or a flex fuel setup. Maybe degree the cam and retard it a few degrees. Safe to say with something on the edge like you have. Aligning the cam gear dot to dot isn't going to cut it if you really want to run pump fuel. Take it to a Dyno and have them sort it out, maybe meth injection when air temps are high
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Been watching your vids, and started applying some of the things you are doing to my 383 sbc, damn near identical cam specs to your asa. The lightweight clutch and flywheel has me chasing the same thing in my 91 c4. The zf transmission makes an obnoxious gear rollover noise at idle and low load cruise. Just wanted to say thank you very much! I've learned a lot from the few vids of yours I've watched.
And the deeper I get into tuning, the more respect I've gained for the factory engineering and tune. That level of refinement is not easy with a performance cam and stand alone efi system. Big learning curve for sure.
Just some additional advice. Do everything you can using the base tables and the method Holley intended. The advanced tables are really bandaids. I don’t feel like I stressed that enough in the video.
Thanks for watching you and if I can help just let me know.
Love the intro!
Great video, I was thinking about doing this with my manual transmission 408. How do you think the low timing affects fuel economy and engine temperature?
If you do it this way the only time the timing is low is when you’re out of the throttle. As soon as you have decent airflow the timing comes back in and so even by definition we’re pulling timing out when the engine is effectively misfiring. So in short I don’t think you’ll see any influence on temperature at all. I’ve had no adverse effects after months now of driving
Love the videos. Great channel. I’ve got a situation w my 415 LS stroker. Cam is 289/305 .624 static compression 11.76:1. Holley dominator. Ok here goes. I had a fast lsxr intake manifold on it and I saw cranking pressures of about 190 psi per cylinder. I recently installed a dual plenum manifold w twin dbw 102s. And a double roller chain set. I also upgraded the injectors to sep 1500s. Now my cranking pressures are 230-240 psi per cylinder. I run 93 and am now scared as hell of knock. What could have done this. The only thing I can think of is perhaps the cam gear being mismatched from where it was previously. Any suggestions?
Cranking pressure doesn’t mean a whole lot to me honestly. Depends if the throttle is open or not and when the intake closing happens is very important. That is aggressive compression though for pump gas. Just keep the timing safe and a cold set of plugs in it.
Switch to e-85, or a flex fuel setup. Maybe degree the cam and retard it a few degrees. Safe to say with something on the edge like you have. Aligning the cam gear dot to dot isn't going to cut it if you really want to run pump fuel. Take it to a Dyno and have them sort it out, maybe meth injection when air temps are high