What's wrong with AFR's exhaust port?
03-03-2015, 05:05 PM
#121
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https://www.youtube.com/watch?v=xGTbQuhhluY
03-03-2015, 05:40 PM
#122
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I have not read about port sizing...I would think it would be very large cross sectional area with all that fuel and air. If you have a link I would love to read about it...very fascinationg stuff of course.
03-03-2015, 06:13 PM
#123
They have injectors in the hat as well as in the cylinder. Really the only way to make BIG power is to run a dry port and inject into the cylinder. It's funny I was just having a conversation with someone about direct injection. I had some experience with a motor in the past that couldn't make any power injected on alcohol (wet runner) wouldn't go over 1300hp. Injector went in the trash for some out of the box gas Quick Fuels and it went over 1600 first hit on the dyno. This was a N/a billet headed deal.
Last edited by Black Baja; 03-03-2015 at 06:24 PM.
03-03-2015, 08:20 PM
#124
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You know I was thinking about your previous post and about using the larger than optimal intake port and how it you said it still makes good power with the right blower what Darin said about the Pro-mod engines. You know top fuel is the limit. There is nothing more powerful. They run a 525ci motor. About 2 years ago I was in a friend shop and he said let me show you something (it was a top fuel head) I checked that thing out from top to bottom. I couldn't believe how small the ports were I mean with that kind of power and boost I would think you would be able to drive a tractor trailor through them. Surely not. I've worked on Nitrous Pro-Mod stuff been elbow deep in the motors I know what kind of port it takes to support 865ci and 9000rpm (tractor fits). But the top fuel stuff is small. I guess the theory of sizing the port to the cubic inch and rpm applies no matter what's on top of it or what kind of fuel its burning.
03-04-2015, 08:18 AM
#125
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Rail 500" Funny Car 525"
They have injectors in the hat as well as in the cylinder. Really the only way to make BIG power is to run a dry port and inject into the cylinder. It's funny I was just having a conversation with someone about direct injection. I had some experience with a motor in the past that couldn't make any power injected on alcohol (wet runner) wouldn't go over 1300hp. Injector went in the trash for some out of the box gas Quick Fuels and it went over 1600 first hit on the dyno. This was a N/a billet headed deal.
They have injectors in the hat as well as in the cylinder. Really the only way to make BIG power is to run a dry port and inject into the cylinder. It's funny I was just having a conversation with someone about direct injection. I had some experience with a motor in the past that couldn't make any power injected on alcohol (wet runner) wouldn't go over 1300hp. Injector went in the trash for some out of the box gas Quick Fuels and it went over 1600 first hit on the dyno. This was a N/a billet headed deal.
03-05-2015, 07:15 AM
#127
03-05-2015, 08:18 AM
#128
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[ATTACH=CONFIG]537975[/ATTACH][ATTACH=CONFIG]537976[/ATTACH] was chatting with my buddy Jeff Arend this am and he confirmed what the scoop is in Fuel Funny Car ... 8500rpm at the hit and on a good run 81-8250 out the traps ... 500 cubic inch limit 1000' track
03-05-2015, 06:09 PM
#130
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Someday in the future , a man like myself that is researching Air Flow Research heads in particular the 315's for his build , needs to see these pics . Got a present from Marine Kinetics today and took these pics straight out of the shipping box . A picture does speak a thousand words !!! Straight down the exhaust port with an Inconal Tulip Valve at the bottom .
Combustion chamber almost looks hand polished .
Intake side of things .
And I wanted to add that only a top notch company would package their product in such a manner to protect it from careless UPS employees . The damage shown here would have surely resulted in a damaged aluminum head .
Combustion chamber almost looks hand polished .
Intake side of things .
And I wanted to add that only a top notch company would package their product in such a manner to protect it from careless UPS employees . The damage shown here would have surely resulted in a damaged aluminum head .
Last edited by the deep; 03-05-2015 at 06:40 PM.
