Safe RPM for a 408" Magnum?

magnummopar said
besides the pcm flash, what have you done to injection/ignition ? What intake?

I am pulling parts to start a 5.9 with similar cam, just not split pattern. big EQ's, intake undecided, Edel SV EFI or Hughes AG EFI, Big TB etc. Simple drop in 67 GT Vert in place of 318 , Tanks Inc and fuel lines, to demonstrate how easy it is to go EFI with real HP.

Nice build BTW, you ever hit any of the cruises in S OR?

Thanks! I have a Hughes deep ported Airgap with their Big Gulp throttle body feeding a pair of Edelbrock Magnum heads that have been CNC Super prep'd and hand blended by Hughes Engines. The reciprocating assembly is the Hughes Mid-compression cast crank and Hypereutectic piston set-up.

I'm running 39lbs Ford Racing Injectors using a surge tank style fuel system. I currently am using a 3/8" feed and return line from a new stock tank, with a modified 3/8" pick-up and return sending unit that free-flows via a Carter pusher pump through aluminum tube and EFI rated rubber hose & clamps to a pair of Permacool fuel/water separators and then through the Radium Engineering surge tank with an internal high pressure Deutchwerks fuel pump.

The surge tank is mounted up front and flows through a pair of aftermarket fuel rails and back to the surge tank. I've had the fuel level down to less than 2 gallons at the Willow Springs road course with no fuel starvation at all. That is amazing given how easy this system is to convert a car to a high performance EFI rated fuel system with an inexpensive stock tank.

I used a '98 ECM for a 5.9 Ram Pick-up with manual trans from Solo PCM's in Florida without security and a HotWire Auto Hotrod harness. I had Chris at Performance Injection Equipment write the tune, which I loaded with an SCT Tuner. He knows what he's doing, and I can highly recommend him. It's really a cool way to tune a motor using a wideband to provide feedback to him, and then he emails me the updated tunes. I download them into the handheld tuner from my laptop and then load them into the ECM via the OBD2 port. The factory ECM can handle from mild to wild including supercharged etc.

Converting to EFI using this easy to build this style of system is about as plug and play as it gets. I don't have the time and patients to mess with a Megasquirt - figure everything out yourself style system or with custom "baffled" fuel tanks that hardly work better than a stock tank. Some of my buddies went that route and they still can't get below 1/3 tank without fuel starvation issues.

I'll be down in LA for Spring Fling in mid-April and will also hit Track Day at Willow Springs on the Thursday. It would be great if you guys would bring down one of your cars and hang out. It's probably the best hands on Mopar event in the world.