Nice work Danny.
Have you done any mpg testing?
Dave
Have you done any mpg testing?
Dave
I'm no longer using a -45° injector end angle value. The end angle has a diminishing effect as the injector duty cycle reaches 90%, however, it's nice to tune this for best idle and lower RPM ranges. I spent the last week trying to determining why the right bank of my engine, always ran about half a point leaner AFR (air/fuel ratio) than the left bank, at idle and low RPMs. I needed to determine if this was an inherent characteristic of most engines or if it was EFI tuning related (meaning it's my fault).Danny Cabral said:I also spent some time tuning the injector end angle timing. Long story short, I settled on -45° end angle because it used slightly less fuel at idle. I like the idea of injecting fuel a little earlier during the intake stroke. ECUs have different end angle software parameters, so here's an excerpt of how Holley does it:
Holley EFI manual said:Fuel Injector Information - Injector End Angle
Description: This is the crankshaft angle in degrees when the injectors will finish their injection event. A value of 0° will end the injection event at BDC (Bottom Dead Center) before the compression stroke. A negative value moves the event before BDC and a positive value moves the event after BDC. There could be some improvements in cylinder to cylinder fuel distribution by tuning this parameter. If modifying, it is best to move this value in a negative direction to start.
Thanks. Nice work on your intake manifold. I'm on vacation this week, maybe afterwards. I'm using Holley's new EFI System - Dominator ECU. Which EFI system are you using and are you using computer-controlled ignition timing?If you get time make a short video of it running and post a link for YouTube... I'm very interested in your set up.
Im just using a a9l ford setup from the early 90's EEC IV will more than likely not spray the motor until Im able to upgrade to a Big stuff 3 setup or something like you have.... Untill then I will spend some time on dyno tuning chips lol not the best way but will get me by untill funds allow for more tech.Thanks. Nice work on your intake manifold. I'm on vacation this week, maybe afterwards. I'm using Holley's new EFI System - Dominator ECU. Which EFI system are you using and are you using computer-controlled ignition timing?
Hey Blackbird, I see from your post that your in NJ (my former home state). how are you getting your ride through state inspection? if it is strip only, then I suppose the cold start is not such big deal.NICE work! I made the swap from my prosystems 1000 billet carb to the FAST EZ EFI 2.0 and can't express the world of difference its made. My only issue is cold start where Ive got my IAC counts (15 - 20) perfect for warm idle of 850rpms but at dead cold start I peg the IAC counts at 160 and max the IAC out which only allows a 1100rpm cold start which results in a slightly rough engine warmup vibration. This was explained with engines over 500cuin and mines a 521. Only thing I can do is bump the idle rpm to 900-950 (eat more gas at idle) which will allow slightly higher cold start RPMs. Ive tried messing with the cold start enrichment and timing to see if I could get alittle more rpms but to no avail.
Other than that very SMALL minisule hiccup the EFI is truly a blessing.
I can't actually tell u but I will say there is no way in HEIL it would pass lol. But I'm looking to switch it over to QQ plates since it's a classic and since they made all those changes to QQ cars and no longer a limited driving etc.Hey Blackbird, I see from your post that your in NJ (my former home state). how are you getting your ride through state inspection? if it is strip only, then I suppose the cold start is not such big deal.
PS. I was looking at the MSD "Atomic" TBI system since I also run the MSD 6AL and MSD distributor, and the MSD system does timing control and is compatible (has spark retard) with nitrous systems. Does anyone have any experience with the MSD EFI stuff?
Maybe I should ask this in a new posting.
Agreed but your still maxing out the capability of that'll type of EFI shortly after that. In other words if your planning to make decent power look at a different system.
I'll continue thinking of it the same way I have been...my engine runs flawlessly.Think of bumping the fuel pressure as putting a bandaid on the problem.
Not saying your wrong in your thinking and it will work. When u max out an Injector above 80% duty cycle your going to wear it out fast and overheat it. By increasing pressure you allow it to squirt more fuel at a lower duty cycle but that's going around the problem which is the flow rate required at the standard fuel pressure. Extra pressure puts extra stress on the pump, regulator, lines, injectors and not to mention fuel volume decreases as pressure increases.I'll continue thinking of it the same way I have been...my engine runs flawlessly.
You really should do more reading & less typing, & anyone reading this thread should skip right over that most.Not saying your wrong in your thinking and it will work. When u max out an Injector above 80% duty cycle your going to wear it out fast and overheat it. By increasing pressure you allow it to squirt more fuel at a lower duty cycle but that's going around the problem which is the flow rate required at the standard fuel pressure. Extra pressure puts extra stress on the pump, regulator, lines, injectors and not to mention fuel volume decreases as pressure increases.
I'd rather run the correct sized injectors at standard pressure so it's easier on parts, or slightly larger with a lower duty cycle as long as it doesn't affect low rpm fuel flow (can't slow the pulse width enough to lean it out more at idle and low rpm).
Holley's latest EFI system is their best ever. Many EFI enthusiasts are changing over to Holley EFI from FAST & BS3. It's that good.Danny, what is your opinion on the new over the counter Holley EFI? Seems every time they roll a new kit out it gets better.
LOL! Yes, I have Holley's Dominator EFI system on my BBF, and I've helped hundreds of people (literally) setup their Holley EFI system.I'm considering a bigger CI engine again & the new Holley setup is intriguing.
Have you had the chance to play with an "out of the box" kit yet?
You'll be able to find answers to most of your questions here: http://forums.holley.com/forumdisplay.php?13-Holley-EFIHelped anyone setup/tune theirs? If so, I'll hit you up with a few specific questions I have.
I wasn't sure what system you were running, last I had seen you were running individual coil packs & I was un aware that was available from Holley,LOL! Yes, I have Holley's Dominator EFI system on my BBF,
I won't be doing anything to crazy, just a little 10:1 514 if I decide to dabble in the after market EFI again.With a big boosted engine like yours, I highly suggest Holley's Coil-Near-Plug (coil per cylinder) ignition system
At first, I was running the new Holley EFI system with TBI (Throttle Body Injection). I later converted to MPFI (Multi-Port Fuel Injection) LINK, and then DIS (Distributorless Ignition System).I wasn't sure what system you were running, last I had seen you were running individual coil packs & I was unaware that was available from Holley.
Sorry, I'm not at liberty to answer that.Pretty sure you were running that setup before it was readily available, correct?
What? No offense taken at all. I enjoyed the question. LOL!That was the reason for the "out of the box". I meant no offense.
Holley HP or Dominator EFI all the way! If you were here, experiencing my engine firsthand, you'd agree.I won't be doing anything too crazy, just a little 10:1 514 if I decide to dabble in the aftermarket EFI again.
Yeah, I've never actually used the Terminator TBI system (950 CFM). I used their other 900 CFM four barrel TBI unit. I'm now MPFI with Holley's 1000 CFM throttle body. Although, as you can imagine, I've helped many people (on the Holley EFI Forum) with their Terminator EFI system; it works great!(Edit) After reading through your link I believe I was confusing the Dominator system with the Terminator TBI system.