FE Power Forums
FE Power Forums => FE Technical Forum => Topic started by: driveamerican on July 03, 2020, 09:27:00 PM
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I am building a 390 with edlebrock heads hyd roller cam pro flow 4 nv4500 3,73 gears I don't remember all specifications for cam by it was ground for pulling a travel trailer and machinist said for efi, my question is should I port match the intake or just leave it alone I will find cam specifications if needed.
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What intake manifold? If RPM, then match the sides and top, leave the bottom alone on the intake manifold. Only go in about 1/2" or so and blend out. Be careful that you do not break through the push rod holes. Joe-JDC
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Sorry the manifold that comes with the pro flow system looks like a Victor with injector brings and thank you for the reply
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I’m not expert, not by a long shot, so please defer to others ( the real experts )if their advice is different
If I remember jays work correctly, on some manifolds it helped and on others, not so much. And your application is a low rpm torque motor so I imagine it would be less of an issue either way.
My gut instinct is that I doubt a good port match to the roof and walls won’t hurt anything, and may or may not help, so why not? if you have the tools and a little time go for it.
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I am just finishing mine up, I port matched mine, it was pretty bad in terms of both port entry and shape. FYI I dyno'd mine with a carb first. Really just a cam breakin and a pull to determine total timing, and even with a set of ported iron truck heads, made 490 hp
I recommend if you are going to run a heater and the stock gauge, you add a bung for the coolant temp sensor. I do a second weld-in bung right next to the factory temp sender hole.
I also added a fitting for the PCV so I didn't have to run one in front, but that's just for looks, the front or rear port would work fine
It's a slow install, hopefully it runs well. Edelbrock did some odd things, throttle linkage and ball location is much different than a Holley without a lot of additional holes/options, the injector harness doesn't seem too well thought out, and I don't love their crossover line and dead-head injector rail feed. However, all that whining will go away if it runs well.
I think I will have it running in 2 weeks or so, other paying projects in the way, but coming along
(http://i.postimg.cc/XJYdYpsP/61531074870-53-A47-E98-1413-4-F2-C-96-D3-912-AA70-A475-E.jpg)
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I would definitely do the port match on that manifold, top and sides as Joe suggested. The Victors that I've done have had a very small port exit, and appeared to be designed to allow port matching.
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First I want to say thanks I don't post much but I read this forum all the time so when given advise I take it. Ross I hope my old pickup is that clean when done I am also more concerned about performance and reliability than looks.