Promaxx 320 flow numbers
01-24-2017 | 12:29 PM
#115
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From: Toronto, Canada
I also think there are some advantages just from the rigidity of cast iron, esp on engines running boost or nitrous. You have a cylinder head that expands at the same rate as the iron block they are bolted onto, the decks are extremely rigid , head "brinneling" is really not an issue, etc. When a thick iron head is clamped to the block with head studs, the clamping is excellent.
My old aluminum dart heads, had some sure signs of brinneling after 4 seasons of running. Not surprising, since I was running MLS gaskets with stainless wire fire rings. Felpro themselves admits that with an alumnim head, you will get some dents in the soft aluminum deck with those, as opposed to , a copper wire fire ring, that is softer.
My old aluminum dart heads, had some sure signs of brinneling after 4 seasons of running. Not surprising, since I was running MLS gaskets with stainless wire fire rings. Felpro themselves admits that with an alumnim head, you will get some dents in the soft aluminum deck with those, as opposed to , a copper wire fire ring, that is softer.
01-27-2017 | 07:40 AM
#116
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From: Endicott, NY
So did we get some flow numbers for the final porting? I was wondering how they compared to the CNC version that Promaxx offers. I was wondering if the CNC version would actually be cheaper in the long run because less hand porting and cleanup would have to be done which would save in labor costs. Just wanted to know the flow on these bare heads. I am looking at possibly buying some sets in the future.
01-27-2017 | 08:21 AM
#117
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From: Toronto, Canada
So did we get some flow numbers for the final porting? I was wondering how they compared to the CNC version that Promaxx offers. I was wondering if the CNC version would actually be cheaper in the long run because less hand porting and cleanup would have to be done which would save in labor costs. Just wanted to know the flow on these bare heads. I am looking at possibly buying some sets in the future.
01-29-2017 | 12:27 PM
#118
Neno the mind boggler
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From: toledo oh
Saw a set of these, very nice castings. Hate to say it but China has been refining and investing in their production abilities for years and currently has some of the most state of the art foundries in the world. It's no longer dirt floors and old school sand casting, it's all automated and pretty highly controlled.
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Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
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10 OPA Class 1 National Champion ( happy now Ed! )
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
01-29-2017 | 03:11 PM
#119
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From: Toronto, Canada
The video tour of said foundry showed me some very very surprising things, including product manufacturing , how they're made and for whom!! So this just tells me that its been going on for many years, now thanks to the internet and open markets we can all see it and enjoy the fruits of it as the pricing becomes more user friendly
The AKR/Promaxx head will bump shoulders with the major players of the marine industry...
We have 4 different BBC versions of the 317s, from "as cast" to fully CNC custom ported supercharger heads!! and a E-coated version is in the wings TBA
The AKR/Promaxx head will bump shoulders with the major players of the marine industry...
We have 4 different BBC versions of the 317s, from "as cast" to fully CNC custom ported supercharger heads!! and a E-coated version is in the wings TBA
Last edited by adk61; 01-29-2017 at 03:20 PM.
01-31-2017 | 09:50 PM
#120
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From: Toronto, Canada
[ATTACH=CONFIG]564296[/ATTACH][ATTACH=CONFIG]564297[/ATTACH]
AKRacing/Promaxx 317s... Intake .200 = 155cfm, .300 = 228, .400 = 289, .500 = 336, .600 = 368, .700 = 388 .800 = 392 exh .200 = 117, .300 = 158, .400 = 205, .500 = 228, .600 = 258 (w pipe 277) .700 = 260, (280) .800 = 261 (283)... so this is preliminary done after minor bowl work and marine valve job...
AKRacing/Promaxx 317s... Intake .200 = 155cfm, .300 = 228, .400 = 289, .500 = 336, .600 = 368, .700 = 388 .800 = 392 exh .200 = 117, .300 = 158, .400 = 205, .500 = 228, .600 = 258 (w pipe 277) .700 = 260, (280) .800 = 261 (283)... so this is preliminary done after minor bowl work and marine valve job...
