I made a reference a page or 3 back about typing out updates on the findings of the Engine Masters episodes when they come out for those who either don't have MTOD, or cancelled their subs when they axed Dirt Every Day. If this is stupid someone feel free to just tell me to fuck off
Anyhoo, They started up the back half of season 7 not too long after the DED announcement came out, so I'll start there.
Episode 119: Every Trick in the Book
Freiburger brings in his 410 stroker Windsor out of the Disgustang saying that it makes just a smidge under 500hp, and feels that he can super tune it to get it up above 500.
They basically diddle with timing sweeps, collector extensions, carb spacers and all the usual BS ad end up getting it to a repeatable 505hp.
I found this one kind of stupid while I was watching it just for the fact that if you don't have access to a dyno of some kind, the episode is completely meaningless. Not like I have the means to measure the nickels and dimes of dicking around with little changes like that over and over again
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Episode 120: Low buck SBC Head Shootout
They pulled out the "Ultimate Average 383" and did a shootout between the 3 least expensive options Summit offers for aftermarket cylinder heads.
They had Summit branded heads, a pair of Speedmasters, and some AFR Enforcers.
Speedmaster: ~$1000
-190cc
-475 lbft@4200 452hp @5500
AFR: ~$1050
-195cc
-483lbft@4200 471hp @7500 (no loss of power or torque anywhere in the curve)
Summit: ~$1100
-200cc
-476lbft@4200 465@5800 (curve appeared basically overlaid with the Speedmasters)
Episode 121: Pick-a-Carb Shootout
They tested 3 carbs, all with the same exact venturi size, airflow rating, etc. The difference is that one was a vacuum secondary, one was a street double pumper, and one was a race double pumper with a smooth top and no choke horn.
The vacuum secondary was about 15 numbers down from the other two starting at mid-high RPM. The race double pumper bested the street double pumper by only about 5 numbers, and it was all the way up at the top end of the rev range.
Interestingly, each carb used the exact same amount of air, as measured by the air hat.. Brule and Freiburger mused for awhile on the fact that the air quality beneath the carburetor (turbulence, etc.) is hard for us to test for or measure, but that doesn't mean it doesn't matter. They also touched on the fact that while the vacuum secondary makes less peak power, it meters fuel at all throttle positions far better than you can reasonably expect a mechanical double pumper to do.
Episode 122: Split Pattern vs Single Pattern Cams again
Freiburger brings the 410 back in to try and eek out a few more HP out of it by sticking a dual pattern cam in it.
Basically, one of the guys at Schneider Cams had touched on the fact that the last time they did a test similar to this, they ended up unintentionally changing not only the duration of the exhaust lobe, but also the degrees of overlap and both exhaust valve opening events. This time, the split pattern cam has a slightly adjusted LSA, and was degreed in to perfectly match the single pattern cam.
Engine went from 505hp to 517hp with no losses anywhere along the curve.
Brule talked about how this is incredibly common. We tend to focus on intake flow and little else, while sometimes overall exhaust flow is discarded, even though the exhaust side tends to have smaller valves and smaller flow numbers. Adding more duration to the exhaust lobe appears to help compensate for this flow discrepancy, and provides a better overall performance package with no discernable downside. Basically, if you have the option, picking the split pattern seems to be the way to go in most applications.