check300

I am currently using the Haltech e6s. The f9 and f9a are older models. The intake is actually the old Cutler unit which I think was bought out by Holley. I do use an o2 sensor and have had no problems with it. I am using 140# injectors to support the hp output. I also have iac motor and tps. Using this set-up I have been able to run a pretty wild cam and still make motor idle at 800rpms. Unlike the Holley system, the Haltech will not "learn." It has to be programed and the program doesn't change unless you change it. Previously had a Cutler system on my old NA motor but it did not like much over 600hp. Don't know if Holley has figured that out. Hope this helps.

cobra marty

Why not just buy a used system off a 454/502 magEFI. Can get complete for about $1000. Then what ever the motor specs and hp have ASM burn a new program in the computer.

Do you need it to be user programmable? Do you have an O2 sensor and A/F ratio meter to tune it? You can convert any manifold to EFI for about $500.

turbo2256

Electromotive is another good choice and prices are not bad and been in the business for longer than most.

KAAMA

iTrader: (1)

From what I was told, Holley FI systems (which is the old Cutler system) has still not been improved upon. The Halteck is a user friendly system and will work well with radical cams. The Halteck computer can bee used with the Holley hard parts i.e. intake manifold, fuel rail kit, throttle body, etc....it's just that the Holley ECU program is not a good system. The guy who dyno'd my engines is an engineer for fuel injection systems. He's well versed in the marine industry and has been hired in the past by Merc for R&D dyno testing. He's in his late 50's, is incredibly intelligent, has vast knowledge and experience what it takes to make a marine engine survive with good drivability, etc, etc. Heck, he even builds twin turbo applications with the Halteck fuel injection system. This guy is no B.S....he does not have time to horse around---very straight forward and is highly respected by those who know anything about marine engines in the western Michigan area.

Raypanic

Talk to ASM They have complete packages. $3400.00 includes even a Distributor.

http://www.azspeed-marine.com/marine-0.html

jspeeddemon

Great idea Kaama! Thanks!

turbo2256

electromotive gets rid of the distributor and has the abilty to program fuel and advance retard

liquid lounge

JS- how much HP are you wanting to make? This should be the determinig factor as to what type of FI system you go with. The plenum/long runner types, for all their advantages, become unhappy in short order when the MAP sensor doesnt receive a stable vacuum signal at low RPM's, resulting in dirty transoms and instability at idle. The long runners and big plenum will magnify any intake reversion present. The nicest running of this type system on a 502 runs a cam shaft profile not much larger than 225/230..... I know this seems small and it might net you 500hp w/ some nice parts. The system on the HP 500 EFI is already at its limits [from an OEM standpoint] with its 230/236 114LSA cam, though you could get a little more w/ better heads and longer exhaust runners.
If you want bigger power, then you need to go with a shorter runner length, say less than 7"[usually found in single plane manifolds] as this type of manifold will be more compatible with the longer duration camshafts.
Also, IMO, I would "can" the o-2 sensor on a boat unless you are running dry exhaust, I just think you find it to be more of a problem. I think that there are many FI specialist out there that can make speed density systems operate just fine without it.
If you want a 600 HP FI engine, call Innovation Marine, I'm sure they would duplicate the sweet little set-up they used on the Volvo 600....with the bugs already worked out of it. Just my opinions- hope it helps. Good Luck!

guillermof

jspeeddemon
If you can wait about 2 weeks i can tell you how the holley system works on the dyno with hp500 and m3sc prochargers, mine have been on order for about 5 weeks that is all i am waiting for.
i had the same exact plroblem with prochargine carbs. making great hp dyno 720 hp with m1 but no way to get the rich lean problem to go away. Hope for this to take care of it.
keep me posted of your progress.
e-mail [email protected]

jspeeddemon

Hey thnks for the input on the fuel injection, I really appreciate it.
Guillermof, it would be great to hear from you how your project with the Prochargers works out, that is about the same boat I'm in, 540 BBC with stage 4 procharger. Please email as soon as you have info. Another boardee, tubrbojack is setting up a stage 4 for his boat and would appreciate the info as well.
Thanks