CK5
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Air fuel gage
- Thread starter Bent77
- Start date
They are a great tool for tuning, assuming you are using a wide band. Why you'd need one when you already (assuming) have an O2 sensor and an ECM to detect problems, I have no clue. But I feel the same about fuel pressure gauges as well...however you don't really have the ability to directly diagnose fuel pressure issues with TBI, like you do with the O2 sensor.
To put it another way, if you are running ~14.7:1 at cruise, and 15:1 under WOT, what are you going to do with that knowledge?
I have always used Innovate Motorsports wideband stuff. Their first generation LC1 was a little finiky at times but I am still happy with it. And their newer LC2 is even more stable. I am/have used them for feedback with my various M.S. builds and also the DB series standalone gauges.
If you’re running 15:1 at wot you better fix that shit fast. Lol.
Cuz I wanna watch it while I drive and not data log everything. I’m also needing fuel pressure between 15-22
I’ll check into those
If you aren't datalogging, what are you going to do with knowing the AFR? If you aren't tuning it (which you need to datalog to do properly anyway) you can't change it "properly", so....? You asked for cons, I'm the devils advocate lol. I wouldn't run EFI if I couldn't trust that it would do what it's supposed to do, and realize that when it fails, I'm going to need to fix it. But you are going to know when something is wrong, without any gauges at all.
Not to stir the pot, but at least once I've heard someone say Innovate is junk. I don't know from personal experience, and perhaps part of the negative they were talking about was first gen stuff, but I have heard that.
It’s a fair assessment that it needs to be data logged to be correct, won’t argue that. But I don’t want to watch the laptop everytime I drive it, and I’m already well beyond what a stick TBI is and is doing anyway.
Part of what I am needing to do is adjust fuel pressure and injector size. Yep I get the math and data log aspect. But I also have a tach and oil pressure gage
Part of what I am needing to do is adjust fuel pressure and injector size. Yep I get the math and data log aspect. But I also have a tach and oil pressure gage
I have an Autometer wideband A/F gauge in my Blazer, seems to work well.
Assuming you use tunerpro, don't you just log, then export the excel spreadsheet to determine where changes need made later? Of course, TBI is pretty slow on the refresh so it can be a bit tougher to dial in.
I won't lie, I'm still using the narrowband and pretty much roughed it all in, minor tweaks made based on what the ECM data was at a specific driving time, but the datalog helps figure out how bad knock is and where to start adding fuel or retarding timing, and I can't remember that while driving.
With the TBI 454 it was apparent pretty quickly that the TBI pump(s) couldn't supply enough fuel, the higher pressure pump (EP381 IIRC) would have worked.
Innovative
Yeah already running the Ep381, and looking and getting more fuel in it still
Hell with the EP381 you can at least quadruple the injectors lb/hr rating, right? You shouldn't have a problem fueling any sort of "normal" engine with that much excess capability.
Too bad Eagle Mark isn't around anymore, he knew this TBI stuff very well.
Are you not able to bump the pressure up enough to get the thing to cruise with the BLM around 128?
Without the WBO2, I watched the narrowband and made sure it didn't go lean under WOT, then bumped the fuel up a hair. WBO2 shines here, but cost had been a factor. I think the WBO2's and the controllers are much cheaper now.
Have you pinched off the rubber return line (assuming you have one) to see if the pump can achieve the pressure dead-headed?
I shimmed the stock regulator on the 454, but was only able to get pressure to 14PSI, the TBI pumps couldn't do better. With an AFPR, you should easily be able to bump it up to damn near anything you like. 385HP probably requires a fair bit more pressure than we should have needed.
The AFPR needs a heavier spring? I thought they were supposed to solve problems like that lol. Is it a TBI regulator designed only for TBI pressures or something? I'm guessing what, maybe 20PSI is what you'd need?
@skunkypoo suggested that as well. I’d need to remove the factory reg, I don’t want two regulators in the system
