502 EFI Intake Limitations
02-09-2006 | 09:28 AM
#12
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Re: 502 EFI Intake Limitations
articfriends has it right; if the runners flow more than the ports then air volume is not the problem. But those runners were designed to boost torque on a 502 limited to ~5200 RPM. Bigger cubes, bigger cam, higher RPM may need a different runner length (hence the AS&M mods).
However, at some point you should use a single plane manifold like the Holley EFI intake when you have enough boost or cubes not to worry about bottom end torque. (This is your next step Smitty if you have room for another 4" of height!)
However, at some point you should use a single plane manifold like the Holley EFI intake when you have enough boost or cubes not to worry about bottom end torque. (This is your next step Smitty if you have room for another 4" of height!)
02-11-2006 | 02:32 PM
#14
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From: Cape Coral, FL or Colonial Beach, VA
Re: 502 EFI Intake Limitations
What he is stated above is what Mark says, the intake will start rolling off the HP after 5400RPM quickly. Not that the engine wont spin more than that, just you start loosing HP. I ran mine up to 5800 when it hit the rev limiter.
You really should talk to someone who has a dyno package & follow it exactly so th program will work the first time. No matter what, they can get a program to you that will work but no way as good as one that has been on the dyno.
You really should talk to someone who has a dyno package & follow it exactly so th program will work the first time. No matter what, they can get a program to you that will work but no way as good as one that has been on the dyno.
02-14-2006 | 03:42 PM
#15
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From: MA
Re: 502 EFI Intake Limitations
Originally Posted by articfriends
Kirk,It isn't "ideal" but hey,everyone told me I'd never get much past 800 hp with a blower using the 502 mpi intake. Most "experts" say the runners are too restrictive but even in stock form they will flow around 400 cfm which is more than the majority of most heads you'll find. If you do it and you need some help,you know how to reach me,I gained a little experience last winter doing mine,and I am also curious of its full potential. I managed to exceed what the majority feel it can make in a S/C app by 150 hp,I'd like to see someone break ground and make 700 hp N/A with one,Smitty
02-14-2006 | 06:25 PM
#16
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From: frankenmuth michigan
Re: 502 EFI Intake Limitations
Originally Posted by Kanookstr
Had my manifold done by AZSM for my Procharger Engine. they will modify your rail to handle the bigger injectors as well. They use Bosh type injectors up to 70 lbs. with there recal ECU, 2 bar MAP sensor, 731 cam, AFR heads, and there injectors, I am close to 800 HP. You'll have to get rid of the original merc fuel line that supply's the fuel rail and re-drill to go with a min 1/2 line.
02-14-2006 | 08:05 PM
#17
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From: McHenry, IL
Re: 502 EFI Intake Limitations
Kirk,
I think Keith at Water and Wheels has an HP 502 EFI plenum available. I still think you should have gone with the 741 cam from Crane. All that Jessel/Marine Kinetics billet stuff is overkill on your engine. I've got stock lifters, Crane roller rockers, mild port work from Teague and my motor runs turnkey (ask Calvin, you were too far back to see/notice).
Regards,
Mark S.
I think Keith at Water and Wheels has an HP 502 EFI plenum available. I still think you should have gone with the 741 cam from Crane. All that Jessel/Marine Kinetics billet stuff is overkill on your engine. I've got stock lifters, Crane roller rockers, mild port work from Teague and my motor runs turnkey (ask Calvin, you were too far back to see/notice).
Regards,
Mark S.
02-15-2006 | 01:40 PM
#18
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From: MA
Re: 502 EFI Intake Limitations
Originally Posted by articfriends
3 years ago I modified my stock rail,last year I built new twin rails and put in 63 lb injectors,getting fuel now is not a problem.How much boost are you running,which afrs,Smitty
03-07-2006 | 08:38 PM
#19
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From: IL
Re: 502 EFI Intake Limitations
I would assume that I would get rid of the Cool Fuel. Could I run a different/larger cooler?
I would still be circulating fuel with the regulator so chances are it would heat up a little.
Smitty what are you running for a fuel cooler?
I would still be circulating fuel with the regulator so chances are it would heat up a little.
Smitty what are you running for a fuel cooler?
03-07-2006 | 09:51 PM
#20
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From: frankenmuth michigan
Re: 502 EFI Intake Limitations
Originally Posted by Pantera28-650HP
I would assume that I would get rid of the Cool Fuel. Could I run a different/larger cooler?
I would still be circulating fuel with the regulator so chances are it would heat up a little.
Smitty what are you running for a fuel cooler?
I would still be circulating fuel with the regulator so chances are it would heat up a little.
Smitty what are you running for a fuel cooler?
Last edited by articfriends; 03-07-2006 at 09:54 PM.
