Edelbrock Pro-Flo XT EFI system BBC in a marine application
11-08-2022 | 02:10 PM
#13
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Joined: Oct 2010
Posts: 922
Likes: 128
From: Hemlock, MI
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.
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.
11-08-2022 | 06:52 PM
#15
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Joined: Jan 2003
Posts: 6,023
Likes: 1,522
From: Grand Rapids, MI
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.
Smitty says that intake flat out just performs.
Check out my Holley EFI thread for build and pricing when all finished.
11-09-2022 | 11:49 AM
#16
artselectricinc.com
Joined: Dec 2000
Posts: 703
Likes: 27
From: Longview, WA, USA
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
Last edited by Steve H; 11-09-2022 at 11:52 AM.
11-10-2022 | 06:51 AM
#17
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Joined: Jun 2004
Posts: 7,321
Likes: 1,039
From: frankenmuth michigan
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
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
Last edited by articfriends; 11-12-2022 at 05:41 AM.
11-11-2022 | 06:27 AM
#18
Gold Member
Joined: Mar 2003
Posts: 2,376
Likes: 94
From: Grosse ile michigan
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
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.
11-14-2022 | 10:37 AM
#19
Thread Starter
Registered
Joined: Jul 2020
Posts: 323
Likes: 55
From: Cortlandt Manor NY
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
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.
