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Username Post: RamJet and MegaSquirt or MicroSquirt        (Topic#366654)
rjdimaggio 
Newbie
Posts: 3

Reg: 10-10-21
10-10-21 10:17 AM - Post#2828913    

I own one of the original RamJet setups. It was intended for a marine application. I got disgusted with having to send the controls back for reprogramming (at my expense) and the supplier of the setup (who shall remain nameless) did not ever give me satisfaction on the operation. After several attempts to get the setup running correctly I ripped it off and went with a carburetor. They wanted to charge me 50% restocking fee.
I now have a new place to use it as I am building a 39 Chevy coupe. Has anyone had any experience with putting the aftermarket FI controls from MegaSquirt to make this RamJet work? Looking for any input as to which version to purchase.
Many Thanks



 




cbernhardt 
Senior Member
Posts: 575
cbernhardt
Loc: Lexington,NC
Reg: 08-28-00
10-19-21 03:14 AM - Post#2829459    
    In response to rjdimaggio

The original Ram Jet injection system was an MEFI3. Is that the one you have?
What problems were you having with the original tune?



 
rjdimaggio 
Newbie
Posts: 3

Reg: 10-10-21
10-19-21 02:49 PM - Post#2829495    
    In response to cbernhardt

yes...that is the brain I had. I experienced backfire on downshift and hesitation on acceleration. I sent the unit back three different times for reprogramming, but experienced the same result. I am of the opinion that since this was meant for a boat application, and boats don't downshift, that the person who was reprogramming the control had no idea as to what they were doing.




 
cbernhardt 
Senior Member
Posts: 575
cbernhardt
Loc: Lexington,NC
Reg: 08-28-00
10-19-21 04:50 PM - Post#2829502    
    In response to rjdimaggio

  • rjdimaggio Said:
yes...that is the brain I had. I experienced backfire on downshift and hesitation on acceleration. I sent the unit back three different times for reprogramming, but experienced the same result. I am of the opinion that since this was meant for a boat application, and boats don't downshift, that the person who was reprogramming the control had no idea as to what they were doing.



I had a Ram Jet 350 (in a car)with the MEFI3 controller and it ran fine, a little rich, but no hesitation, no backfires. I ran the MEFI3 for several years and upgraded to the MEFI4a. I doubt that you had a programming problem, more likely a bad sensor or bad wiring connection. Only way to check would be to run a scan and see what is happening when the problem occurs.



 
cbernhardt 
Senior Member
Posts: 575
cbernhardt
Loc: Lexington,NC
Reg: 08-28-00
10-20-21 03:17 AM - Post#2829516    
    In response to cbernhardt

A little history on your engine may help diagnose your problem.
1. How long have you had the engine?
2. Has it always had this problem?
3. Did you install the engine?
4. Did you (or someone else) go through the initial timing procedure using the Diagnostic Trouble Code (DTC) tool as outlined in the installation instructions?
5. Does your engine have an O2 sensor?



 
rjdimaggio 
Newbie
Posts: 3

Reg: 10-10-21
10-20-21 08:49 AM - Post#2829530    
    In response to cbernhardt

The question I had was if anyone has or had experience putting the Mega or Micro squirt on the Ramjet setup. Could have had bad (brand new) parts I guess on the original setup and the wiring was extremely straight forward, so I doubt there were wiring issues. Thanks for the input tho.



 




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