Thank you! This helps a lot. Excited to play with this. So all I have to do is go to my coolant enrichment table/graph tool and position 100% enrichment at a lower temp and learn will then kick in? I will experiment to make sure this is true so don't feel like you're being held responsible here, LOL, but just wondering on the process. Thanks again, very helpful.

That`s not my actual tune just pulled up the software on my PC
I never see more than 110* and learn is what actually screwed us up for idle tuning so as far as I know learn works at any temp.
My compensation limits are set at 15% . I monitor those and if I start to see them getting closer to 15% (usually around 5% unless it`s a cold start) then I`ll know my 02`s are going to $hit.
Either way not having a stat has not affected anything and learn kicks in right away even at 50* temps, no thermostat necessary
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Like Kris said .. (no temp requirement)

I don`t think I gave that table a whole lot of thought .. I believe that was a base tune from Haxby.

Well, that's a bit different than what the manuals say for the Sniper. Maybe they assume the Sniper is more aimed at non-professional tuner users.

From my brief research, it looks like if I turn the Enrichment to 100% at X temp and turn the A/F Ratio Offset to 0 at X temp, it will then enter learn mode at that X temp. Definitely something to utilize for a marine application.

*EDIT*

Just wanted to add, I appreciate the input! This has helped a lot already.

If you are not using the Sniper for your dash you could run a resistor and trick the computer into thinking it's at 160°F when it is more like 120°F. Did this with the Fast EZ efi system when running a 140°F thermostat.

I'm going to be installing my Holley HP systems soon. Probably going to be asking questions here shortly. I am new to this system.
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Good time to start a fight. LOL Wet or dry,TBI or Runner injector ?
I have all the N/A 840 BG stuff with a Victor Jr . So I don't really need to have a new manifold,but ?

I was pretty happy with my Sniper on my 509. Don't skimp on the fuel system and with careful wiring it's pretty much plug and play. Due to a short season and other gremlins (alternator cable was broken in the jacket) I didn't get much time with it but it was pretty straightforward. A couple of challenges were I was not able to get the IAC down under 30% where it's suppose to be under 10 or 12 or so (It's been a long while since I've looked at the manual) so it whistles at idle. Jeff Harris commented that this can be a common challenge.

A side note is the fuel smell is actually worse than the carb that I had. Perhaps it can be tuned out but I've even tried setting the idle AFR to 14.2 and it's still there, and a quick look on the internetz shows that it's a common issue with injectors so close to the top of the TB.

Genvi 509, airgap intake, 525EFI cam. 10:1CR

Just don't under any circumstances buy a Fitech, cheap, Chinese built GARBAGE!. I built a 550 hp sbc for a customer, e85 deal. I ran it on my dyno carbed then with the customer provided (new in box) 1200 fitech. Everything seemed ok, a few things that I wasn't fond of though. Got it in the vehicle, have accell settings, gain settings etc maxed out, still lean on a quick tip in. Then things just got ALOT better (yeah right), a injector stuck even with a 10 micron inlet filter. Pulled injectors out and flowed them on my ASNU injector machine, one of the 4 on one side has such a weak coil it does not EVER fire above 35/36 psi (system runs at 4 bar/58 psi) , flows fairly even up to THAT point, its NOT dirty. Flowed the 4 from other side, 2 of the 4 do not fire above 50/52 psi, so I essentially dynoed it on 5 injectors. I did wonder why my idle pw was quite high but the linkage is 1-1 , open plenum intake and 2" carb spacer so there was enough fuel from the 5 75# injectors it never went lean. I have seen this before, about 2 years ago I bought a set of "genuine merc oem" magghetti marrelli injectors for a 454/502 mag off ebay to test, well, they DEFINITELY were NOT "genuine" anything, they were EXACT Chinese copy's, hence the 180$ a set price new. What they did is started clipping or failing to lift the pintle around 35 to 40 psi, I hear the Chinese use less copper or whatever in the coils so they are "weak", by 45 psi non of them would flow at all, literally shut off. A "good" siemans deka injector doesn't do this even at 85 or 90 psi. Well, I joined the Fitech forum on FB, posted up the video I took of my testing and quickly heard from several people theve seen the same issue. Even Fitechs good ones quit at 62 to 65 psi, JUNK! I went thru great pains to retrofit different injectors into it (whittling away on TB to get it to bolt together). I have NOT used a Holley Sniper yet so I have no opinion on them as of right now but thought Id pass on my findings! Smitty

That's just what I don't want to do. Thinking that maybe the Edelbrock Pro-Flo 4 may be a way to go ? But would like to use all my old stuff.

Valako (JimV) has been running the Fast EZ EFI 2.0 system on a customers/his new boat since 2014. Pretty nice system and very user friendly. Keep the O2s dry with the extensions and it has been very relaiable.

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