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Old 05-06-2018 | 09:44 AM
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Originally Posted by Tinkerer
That flame arrester isn't big enough for a stock 454.
Well the good news is that's a fast and free test to see if that is a bottleneck!
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Old 05-06-2018 | 02:43 PM
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I'd want a 8x3 minimum but ya a quick on and off run tell the tale in a matter of minutes.
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Old 05-06-2018 | 05:42 PM
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My flame arrestor flowed enough and it actually ran worse without it as it seemed to straiten and settle the air going in. What was eye opening was cracking the hatch and gaining some solid rpm. The afr didn’t change at all, but the engine was thirsty for better air and more of it.
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Old 05-06-2018 | 05:55 PM
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Originally Posted by Baja Rooster
My flame arrestor flowed enough and it actually ran worse without it as it seemed to straiten and settle the air going in. What was eye opening was cracking the hatch and gaining some solid rpm. The afr didn’t change at all, but the engine was thirsty for better air and more of it.
its shocking how many boats are out there with stock setups starving for fresh air in the bilge.
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Old 05-06-2018 | 07:50 PM
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Not to say that various boat manufactures are light on ventilation but then we increase the power by 30 to 50% and in some cases double from stock and then only compounds the problem. More vents in the right places the better. Rob the squirrel cage from your furnace and mount it under your rear seat and with a little rigging and converter... whalaa... lol, get that hot air out of there. I use to be know for leaving my blowers on intentionally!
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Old 05-07-2018 | 08:53 PM
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The flame arrestors are that bad?

Again, I didn't do the build, so I've got some work ahead of me. Am I better off running with the hatch open a little, or arrestors off? - both? Maybe just worm clamp a screen over them for trial?
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Old 05-07-2018 | 10:52 PM
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Pull the arrestors and try it. Then open the hatch a little after baseline without arrestors is established.
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Old 05-09-2018 | 07:28 PM
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Originally Posted by Rookie
Pull the arrestors and try it. Then open the hatch a little after baseline without arrestors is established.
X2 . Easy and free.
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Old 05-14-2018 | 03:14 PM
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Boat was delivered, and I looked at the hardware in more detail.

Holley 800CFM, jetted to Starboard P: 81 Port P: 81
Starboard S: 95 Port S: 95
3.5 Power Valve
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Old 05-14-2018 | 07:58 PM
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I'm no carb expert, but that seems fat. Maybe a lot of HP on the table .
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