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You may want to download the software from several manufacturers to see which one works for your application. Single plane intake doesn't matter with EFI. Tunability for marine application is key.
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You could use an aftermarket ECU with your stock set up and have more tunability.
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The ProFlo XT Intake makes great horsepower AND torque. Better than a single plane carb manifold.
The Edelbrock EFI stuff is very limited for advance tuning and is garbage. Smitty (Articfriends) in here has done a bunch of dyno tests with this manifold on marine motors and has messed with their EFI system, I would talk to him. I would use the Pro-Flo XT intake with a different EFI system. |
Self-learning technology--no tuning experience or laptop tuning required |
I'd buy the intake separately and then build a Holley HP system for it.
Smitty says that intake flat out just performs. Check out my Holley EFI thread for build and pricing when all finished. |
Originally Posted by Trash
(Post 4850945)
I don't know why this mantra keeps coming up. Yes SOME people have issues with wide band lasting, but I think placement is key. I run mine full time for the last 12 years. Replaced it once.
I'm one of those guys that can't make O2 sensors last! Now only use them for tuning if needed, and run open loop full time (with O2 removed). System has been 100% reliable for approx 500 hours in my 42' Sport Fish running 509 BBC/Arneson power. Steve |
The proflow front mounted tb intake with some tb work is a great piece itself, it will make outstanding hp and slightly better tq than any open plenum intake on a typical 502 build with marine cam. The software sucks, I would buy just the intake and use holley.
a couple things to note though: , no one has had these intakes in stock for sale for well over a year so that's a consideration, that delivery date of may 2023 has been moving since 2021. Flame arrestor /entry of throttle body: to get most out of that intake, a very good cone filter with a entry taper device is very crucial. The last engine I dynoed and tuned with one, I tested countless cone filters, volutes, etc. a brief synopsis is this: 515 (4.530 bore 502) was making around 650 hp with the proflow, that hat hp dropped to the 620 range with most clamp on cone filters. It went to the 680 hp range with a volute clamped on TB and barely had a hp drop with a 10" cone clamped to that volute. Its very difficult to get a thermostat housing under it, it can be done by clearencing the bottom of TB itself. Forward clearance in your boat is a consideration too, IF you have to put a 90 on the tb, you'll kill the power and it will never make its full potential so you'd really need 11 or 12 " in front of tb to use a non restrictive filter, Smitty |
Originally Posted by articfriends
(Post 4851100)
The proflow front mounted tb intake with some tb work is a great piece itself, it will make outstanding hp and slightly better tq than any open plenum intake on a typical 502 build with marine cam. The software sucks, I would buy just the intake and use holley.
a couple things to note though: , no one has had these intakes in stock for sale for well over a year so thats a consideration, that delivery date of may 2023 has been moving since 2021. Flame arrestor/entry of throttle body: to get most out of that intake, a very good cone filter with a entry taper device is very crucial. The last engine I dynoed and tuned with one, I tested countless cone filters, volutes, etc. a brief synopsis is this: 515 (4,530 bore 502) was making around 650 hp with the proflow, that hat hp dropped to the 620 range with most clamp on cone filters. It went to the 680 hp range with a volute clamped on TB and barely had a hp drop with a 10" cone clamped to that volute. Its very difficult to get a thermostat housing under it, it can be done by clearincig the bottom of TB itself. Forward clearance in your boat is a consideration too, IF you have to put a 90 on the tb, you'll kill the power and it will never make its full potential so youd really need 11 or 12 " in front of tb to use a non restrictive filter, Smitty I always love reading your responses. Your so damn smart it make me feel like i bumped my head. |
Originally Posted by articfriends
(Post 4851100)
The proflow front mounted tb intake with some tb work is a great piece itself, it will make outstanding hp and slightly better tq than any open plenum intake on a typical 502 build with marine cam. The software sucks, I would buy just the intake and use holley.
a couple things to note though: , no one has had these intakes in stock for sale for well over a year so that's a consideration, that delivery date of may 2023 has been moving since 2021. Flame arrestor /entry of throttle body: to get most out of that intake, a very good cone filter with a entry taper device is very crucial. The last engine I dynoed and tuned with one, I tested countless cone filters, volutes, etc. a brief synopsis is this: 515 (4.530 bore 502) was making around 650 hp with the proflow, that hat hp dropped to the 620 range with most clamp on cone filters. It went to the 680 hp range with a volute clamped on TB and barely had a hp drop with a 10" cone clamped to that volute. Its very difficult to get a thermostat housing under it, it can be done by clearencing the bottom of TB itself. Forward clearance in your boat is a consideration too, IF you have to put a 90 on the tb, you'll kill the power and it will never make its full potential so you'd really need 11 or 12 " in front of tb to use a non restrictive filter, Smitty WOW thank you for this well thought out information and I cant believe the back order. As for a cone filter on there yeah your not getting a long one without a 90 degree elbow. Granted if I achieve 550hp out of this rebuild I would be more than happy. How would I adapt the throttle linkage to the new Edelbrock TB and now you have me worried about the clearance with the TB and the stat housing. If I were to go this route if available I would do as mentioned use the intake and use Holley HP as the management system. https://cimg0.ibsrv.net/gimg/www.off...5568a411b2.jpg https://cimg1.ibsrv.net/gimg/www.off...dc9f8462ed.jpg https://cimg2.ibsrv.net/gimg/www.off...ad173c66ff.jpg |
thought about running the stock MPI but I was told it falls on its face CFM wise after high 400hp range or I would just adapt Holley HP to it and be done.
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