hey guys finally got my rotary bug project started. just a recap 13b NA 720cc SE primary injectors, 460cc secondary injectors, MS2 extra with zeal card, s5 intake. as of now the port actuators are not operating. tuned it per aaron cakes ms write up.

i got it to start and run if i keep my foot into it, but its very rich across the board. like AFR's of 7.5-9 i attempted to keep it running long enough to get warmed up so i can play with my fuel bins but it will eventually flood out and die. does anyone have a fuel map for a similar setup with those injectors? or any pointers on where i can start adjusting my map?

here is a video of the start up

http://www.youtube.com/watch?v=94Iaw..._order&list=UL

thanks in advance. im off to read the mega manual for the 10th time.

 

ok so i played with it some more today. i cant keep it fro totally flooding out before i can warm it up enough to jack with the fuel bins. i checked my ASE and realized it had te defaults in the bins so i dropped em all down to 0 and was able to get a better response. my afr on my gauge LC1 and my laptop display do not match up there always a few numbers off. ie gauge reads 10ish and the laptop will be at 7.5-8. can this be causing my issue? my primary injectors came out of a smooth running car so i assume they are in good shape but i am kicking myself for not having them rebuilt and flow tested now.

 

Sounds like you need a lower req fuel.

Out of curiosity, why did you put the bigger injectors in as primaries? Usually you want the primaries smaller and the secondaries larger.

 

my req fuel fuel is 10.0 i used the larger injectors as my primary's out of necessity. i didnt have the plastic ?defusers?? that the pintle caps fit into for the 460cc's i had and assumed that since it came with the 720's i could tune around it eventually. if i need to change it thats easy as removing the manifold. should i get 2 of the defusers and run all 4 injectors the 460's? that can happen as well.

after my earlier post i lowered my WUE percentage by 15% in each bin and got better results. im still learning here and i appreciate everyone's patience. ill post my trials, tribulations and successes so maybe it will help someone else in the future.

 

Well, to start, make sure that you're running the correct "conversion factor" for the wideband in megatune or tuner studio; this allows it to convert the voltage signal that the MS recieves from the sensor into a number that you can understand. If the numbers are varying between the gauge & the laptop, then one of them is reading incorrectly, and if the gauge (meant for a wideband) came with the sensor, then its probably the laptop.

So as it warms up, it floods out? What does your ASE look like? It should be a fairly steep slope from roughly 250% at -20*C down to 100% at 80*C. If its flat at 100%, & you've adjusted the req_fuel to get it to run at cold temps, it'll be WAY too rich as it warms up. I'd drop the req_fuel value a bit (8ish), and go with more ASE around the temperature that you are typically starting at.

 

i dropped the ASE bins to 0% just to try and ge t her running. i conformed with a multi meter that the voltage signal is the correct range and is reaching MS, it is setup for the LC!1in mega tune.

ill try dropping the req fuel if i have time today and see what happens.

 

whoops, sorry, I meant the warm-up enrichment WUE, not ASE (after-start enrichment)... sorry about that! What do you have for the WUE? it should be roughly a straight line from 250% at -20*C to 100% at 70 or 80*C, and then 100% up to 120*C

 

The easiest way to keep it running on the first start is to just play with the VE table to keep it going as it warms up. Then once it is warm, try to set your idle to a reasonable RPM and AFR.

The next start is annoying though becuase you'll probably have to add a load of fuel to the ASE and warmup enrichment as you pulled it all out of the VE table.

This may help:
http://www.aaroncake.net/rx-7/megasq...rstStartup.asp

 

using 10.0 for req fuel on 720 cc injectors will result in running very rich. You should be running something more like 5-6 with those injectors.

Also, while you can run larger primaries than secondaries, the code will stage to secondaries more smoothly with things the other way around, and low-load operation will be easier to tune with the smaller injectors running as the primaries.

Ken

 

Thanks for the insight. Ill swap my injectors this week and keep the 10.0 req fuel to start. Should I have the aux ports in the open or closed position? I'm waiting on solenoids to wire them up to opperate.

Thanks to yall for your help guys.

 

The aux ports should stay closed at low revs, and open up around 3800-4000 rpm.

Ken

 

ok so iv been busy, i got another project car a 1973 trans am that i inherited from my aunt and it needs a lot of love so iv been juggling both cars. i finally ordered all the correct air bleeds and new injector o rings. i moved the 480cc injectors to the primary location and the 720cc injectors to the secondary location and starting with 10 for req fuel. i finished at 1030 tonight so i was only able to run the car for about 30 seconds and it seems most of my issues have cleared up. just on a base tune but it was holding 11.7 AFR's so i know im on the right track to start the tuning process tomorrow. this is probably a question for ken, but im using 12v solenoids to trigger 5/6th ports. using the zeal card where do i get my signal for the spare ports from to trigger the relay for the solenoids? i dont expect you to hold my hand through the process but if someone can point me in the direction to find the literature i need to figure it all out i would appreciate it.

thanks

 

OK playing with the car today here is whats goin on. the massive flooding issue is gone but it seems im still way rich according to my afr gauge. still seeing numbers around 8ish on afr unless i pull a ton of fuel from the bin, ie dropping a bin from 47 to 15 which seems crazy amount to me. my req fuel is at 5.8 so this seems odd. also i started with req fuel at 8 and went down to the 5 range and didnt get a huge response on my afr gauge. occasionally it will jump upto 11 or 12 for a second and then fluctuates. starting to think i might have soiled or damaged my o2 sensor by flooding the **** out of it. my brother is at the auto part store getting some o2 sensor cleaner and were going to try cleaning it and re cal it. my afr is too low for the mega tune gauge to read so i cant verify if its reading matches the gauge. i re entered my wue percentage to what was suggested in this thread and im going to give it another go shortly. could my issue be my fuel pressure reg possibly? i was able to warm the engine up above 160f and according to my afr nothing changed. is there any easy way to test my o2 sensor to make sure everything is working properly?

 

dont know if this could be my issue but i found i had my ve table set to 16x16 rather than 12x12

 

got it after checking a few things i got it right and followed aaron cakes first start and got a good idle at 12.7afr . time to adres a small oil leak when she cools down and begin the full range tuning process

 

i know im post whoring today but i dont care. i got it to run right. couple videos.

easy start up
http://www.youtube.com/watch?v=fu0b-...dfYU7I&index=3


running
http://www.youtube.com/watch?v=acVnn..._order&list=UL