CK5
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EFI showdown
- Thread starter badmix
- Start date
vandelay industries
1/2 ton status
Well, Edlebrock is certainly making it easier.
Another one from the "why didn't i think of that" files; Mechanical fuel pump and rest of the stock fuel line to the pump remains the same, but after the stock pump it goes to a small tank(sump) then goes to the electric pump which then goes to the rail/injectors etc.
Pretty crafty.
Another one from the "why didn't i think of that" files; Mechanical fuel pump and rest of the stock fuel line to the pump remains the same, but after the stock pump it goes to a small tank(sump) then goes to the electric pump which then goes to the rail/injectors etc.
Pretty crafty.
Yeah, the more complicated you can make it the better. Why have only one fuel pump to fail when you could have 2? Troubleshooting a fuel delivery problem might take you as long as dropping the tank to put in a fuel pump would.
I'd think this to be a good kit to retrofit to something that is really difficult or expensive to get specific EFI parts to work...something you have to add multiple fuel lines, filter, tank sump, in-tank pump, etc.
For our trucks, where EFI stuff was used from the factory, and all parts are readily (and cheaply) available, extra parts to fail and add are of no benefit, only detriment.
For our trucks, where EFI stuff was used from the factory, and all parts are readily (and cheaply) available, extra parts to fail and add are of no benefit, only detriment.
Not sure if this is the right thread, but what are people thinking about these new kits relative to 25 year old factory systems? I'm attracted to the compact, new systems with modern tech in them, but it's also nice to have parts you can get at autozone.
I was tempted by Atomic, but they seemed to really be gearing that to retrofits with inline pumps. I don't think my current TBI pump has enough pressure either.
Oh yeah, the other thing nobody talks about it whether these things control the spark...
I was tempted by Atomic, but they seemed to really be gearing that to retrofits with inline pumps. I don't think my current TBI pump has enough pressure either.
Oh yeah, the other thing nobody talks about it whether these things control the spark...
vandelay industries
1/2 ton status
Note: i have never actually used one of these aftermarket units so i can only give my impressions. i do, however, have gm tbi on one of my cars.
To me, the advantages of the aftermarket is all brand new vs. some components of the TBI might be remanufactured, not that there is anything wrong with that. Or, depending on what route you go ALL of the components of the TBI might be sourced from a salvage yard. So now, you've got something 25 years old with unknown history.....
Another advantage of aftermarket is pretty straightforward and clean installation (esp. the Edlebrock in my opinion as stated above), not that TBI is all that complicated to install.
Another big thing is the aftermarket has the laptop and/or touchscreen tuning/communications ability. There may be a way to do that for TBI though.
The aftermarkets might be more flexible/versatile than the factory system.
One advantage from my standpoint that the factory system has is rock solid dependability. i have seen and experienced this first hand.
i guess this is akin to carburetors. Whatever you feel comfortable with is what you should go with.
vandelay industries
1/2 ton status
P.S.
i will address the whole 2 pump vs. 1 pump thing soon. Very busy now. But the short story is i don't think it's a problem.
i will address the whole 2 pump vs. 1 pump thing soon. Very busy now. But the short story is i don't think it's a problem.
Stomis
Professional Amateur
Its really not a problem TBH. Does it make two failure points? Yes. But ALOT of KoH guys run an external lift pump at the tank plumbed right into a correct pressure pump right up at the motor. I asked my buddy when we rebuilt some of his rig why the **** they do that and he kinda just shrugged and said "You cant put a high pressure pump lifting the fuel and pushing it all the way back at the fuel cell so this is how they do it." I guess at the time intank cell setups were a little bit expensive and bling for the average guy.
So I think the sump tank really isnt even necessary. Maybe they just add it if you've got a looping system?
Your TBI pump doesn't supply enough pressure but a Walbro 255 is a direct swap into your existing sending unit. This is how I have mine run.
They all have the ability to control spark except the Edelbrock one.
I have the original FAST EZ-EFI which is a great system, but I still wish I had the 2.0. Its a major improvement over the original.
Cool, so does the FAST plug and play with a Chevy TBI distributor, or how does that work?
I would like to see just a software & programmer package for GM TPI units..
Dynamic EFI goes pretty far, you might check it out.
I know FAST has one. I don't know about the others.
Agreed - this is a big deal. If you have to curve a distributor with weights and springs, you're losing a big part of the EFI benefit. If you have to buy a stand alone spark management unit, now your entry price just went way up. Keeping spark and fuel tables in separate ECUs is also a detriment because it's hard to display them at the same time and tuning out something like a knock becomes very iterative.
