Aftermarket EFI systems.....My practical experience

[70chall440]

Oh I am sure you would see that as well, more efficiency = more power. However I do not know if you would feel/see it without a dyno or time slips perhaps.

[GoodysGotaCuda]

what is advantage of multi-port?

Better drive ability and more precise fuel delivery. This is still being used today in modern cars, but is being phased out by direct injection. We won't see direct injection as a retrofit, likely ever. Due to the injector needing to be within the cylinder, similar to a diesel.

Peak power between TBI and multi port will likely be the same, I suspect you will have better throttle response and perhaps more area under the curve with multi port.

Peak power and torque is cool if you are drag racing or holding that rpm a high percentage of the time. But it's not the only thing that makes a good street car.


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[cudabob496]

Better drive ability and more precise fuel delivery. This is still being used today in modern cars, but is being phased out by direct injection. We won't see direct injection as a retrofit, likely ever. Due to the injector needing to be within the cylinder, similar to a diesel.

Peak power between TBI and multi port will likely be the same, I suspect you will have better throttle response and perhaps more area under the curve with multi port.

Peak power and torque is cool if you are drag racing or holding that rpm a high percentage of the time. But it's not the only thing that makes a good street car.


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Good info!

[Mickm]

I have been keeping up with thread but may be missing something, so I will just ask.

I have a stock 340 in the 'Cuda and have gotten a complete F.A.S.T. V1.0 EFI and a Tanks tank, fuel pump and sender.

Am I going to be happy with this??? Any advice, experiences, thoughts are appreciated.

Cheers!
Mickm

[70chall440]

it will depend on what you expect/want. It will be awesome over your carb/s, but if you are EFI smart and are trying to build a big HP/Drag car that you intend to milk every ounce of HP, I would say maybe not as you would need a more robust package. That said, I cannot speak with a lot of authority on the FAST system as I don't have enough experience with one to say (I do have one, just haven't installed it yet).

[cudabob496]

Come on China, make EFI systems even cheaper!

China could probably produce the whole system and sell it for $100.

I think the first VCR player was $3000

[Mickm]

Thanks for the insight,
I am not build a track car , only a driver.

Anyone have experience with the F.A.S.T. system?
Cheers,
Mickm

[EMCD]

Fast, Holley & MSD all collectively stink.

[cudabob496]

Fast, Holley & MSD all collectively stink.

Aren't they all about a $1000 or more expensive as well?

[70chall440]

Guess it depends on the systems being compared. You would have to list it all side by side to really see, however FAST and Holley are generally more expensive that FI Tech or perhaps MSD.

I like my Holley system thus far, we will see how the FAST system compares in performance once I get that sorted on my Cuda.

[Mickm]

I agree about the high price but I actually have had one, in the box, for the last three years so I  just wanting to get input towards do I want to install it, sell it aND go wit the fitch or sTay wit my Holly carb setup. I know very little about efi so I am seeking knowledgeable input.
I have also read where some have purchased the tank setup from TANKS and I have purchased that as well  but I have not read thoughts after it was installed.
Any input is appreciated.
Cheers!
Mickm

[dfrazz]

I have also read where some have purchased the tank setup from TANKS and I have purchased that as well  but I have not read thoughts after it was installed.
Any input is appreciated.
Cheers!
Mickm

I have the Tanks system on my Cuda (although it is a 392 Hemi) and it works great!  Very knowledgable and nice to work with and everything fit perfectly.

[EMCD]

How did you run your main and return lines? Do you have any pictures? Did you upgrade the fuel pump unit?

[73cudabr]

When I told 440 source that I was looking to purchase a TBI system such as fiTech they cautioned that "overlap" on the more aggressive street cams may mess with the computer controls (vacuum readings) on them and cause the car to not run as well? I would think that if this was a problem, nobody would ever buy one, but nonetheless Id rather ask now. Any issues at WOT and 6000 RPMs with those that run these units?

[EbodyMod]

With the self learning and tuning systems they are only as good as the programming, there are limits to what they will spend time on as far developing tuning for wild cams due to the limited size of the market. with a programmable system the only limit is the guy playing with the computer. With my MSD setup they do not recommend using a cam with a duration over 250, but it is a self tuning system.  mine is a bit over 250, but seems to be ok.
 

When I told 440 source that I was looking to purchase a TBI system such as fiTech they cautioned that "overlap" on the more aggressive street cams may mess with the computer controls (vacuum readings) on them and cause the car to not run as well? I would think that if this was a problem, nobody would ever buy one, but nonetheless Id rather ask now. Any issues at WOT and 6000 RPMs with those that run these units?