Mopar Magnum 360

[BigPoppa]

I have a Mopar Magum 360/380 HP crate motor vintage 2000 it is backed by a 4 speed overdrive Chrysler Auto transmission.  The motor is going into a customized 1955 Plymouth 2 door wagon with a Fatman front clip, 4 link rear suspension and airbags.  This is going to be a cruiser more than a Muscle car.

I read several posts about the various aftermarket EFI' for the Mopar.  The most popular seems to be the FAST EFI system.  It appears that FAST offers a single quad and dual quad setup.  Can anyone tell me the difference between the single and dual quad setup.  How much more gas mileage will I get with the single versus the dual system and what will be the change in Horsepower be between the single and dual setup.  Along the way I also saw a setup with what appeared to be a Triple Duece setup, how would this compare to the single and dual quad systems.

Finally or there any other options for EFI that are more cost effective?

[Chryco Psycho]

Welcome
EFI is expensive , no way around it .
 you can piece a system together , Eddy likely has an intake & rails , you can use quiet Walbro pumps . I used a SDS EFI computer http://www.sdsefi.com/, you can often save some $$ doing it this way . There is a number of throttle body asmeblie available from Accufab for one , single or dual 4 & 6 pack , you will get batter fuel milage with EFI over a carb once it is tuned correctly even with dual 4 bbls or 6 pack as only enough fuel to run correctly is injected & it is far more accurate than a carb . Expect to make more power as well , the engine with given parts will only make agiven amount of power but with more accurate fuel delivery the optimum power can be acheived

[BigPoppa]

Thanks for the quick response.  I understand the cost of EFI is more expensive but I need to make a decision before I purchase a carburetor.  You feed back is helpful.

BigPoppa

[Chryco Psycho]

If you can stomach the cost EFI is definatly worthwhile

[jimynick]

If you have to have it so that you reach in the door and start it, efi is hard to beat, like CP says; but for a quarter of the cost of that same efi, you can put a carb on it. North Americans have been doing ok with carbs for over a 100 yrs and the cost of all the gear required to get an efi engine to run in closed loop configuration, is going to run you any where from $2500 and way up. You'll probably have to buy a trans controller unless you pop for an efi setup with all the bells and whistles and it usually requires you to get to know a "tuner" nearly as closely as your wife. I'm not anti-efi, I just come from a Scottish ancestor and can't see the advantage of it over a carb for the money. Hoot mon! 

[BigPoppa]

Jimmynick, thanks for your feedback, I'm in a unique situation in that I'm buildng a custom wagon and I want the engine to perform well, get good gas mileage and  look a little different from a standard Mopar Magnum.  So I actually agree with you that I could probably get by with a good Carb but then all I have is another Morpar Magnum with a 4 barrel carb.   Again, thanks for your response

[MJS73]

http://www.cuda-challenger.com/cc/index.php?topic=67945.msg724416#msg724416