Lateral-g Forums - EFI SBC vs LS Motor

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Quote:

Originally Posted by supremeefi (Post 525513)

You give up some drivability with the 2.0.

I encourage you to download all the different manufacturers software and compare them for yourself before you buy anything..

Mark,
Have you had hands on experience with the FAST 2.0 ? I hear conflicting reports. Some bad, some good. I think factual information if you (or anyone else) has experience ... would benefit us all.

Yes, I've done a few in the last year or so. There's one or two on here that I did via email.

I was all giddy when I got the chance to tune one for the first time. Saw all the advertisements etc. I though I would be impressed. Instead I was very disappointed.
Does it have some neat features? Absolutely, i.e. E85/Flex Fuel capability, traction control (although most say the MSD 7 one works better), self learning etc.

But it only has 2 transient fueling tables, most other systems have 4 or 5, very important for the ultimate in drivability, no secondary MAP sensor and the individual cylinder trim for fuel and spark is an all or nothing calibration. In other words, you can't tailor the individual spark and fuel by rpm and/or load so it's useless in most applications. Plus the self learning can cause problems, and that only saves the tuner an hour or so anyway.

Just remember one thing. Just because something is advertised the most doesn't automatically mean it will be the best. And especially lately I've heard their tech ain't all it's cracked up to be.

Quote:

Originally Posted by supremeefi (Post 525583)

Yes, I've done a few in the last year or so. There's one or two on here that I did via email.

I was all giddy when I got the chance to tune one for the first time. Saw all the advertisements etc. I though I would be impressed. I was very disappointed instead.
Does it have some neat features? Absolutely, i.e. E85/Flex Fuel capability, traction control (although most say the MSD 7 one works better), self learning etc.

But it only has 2 transient fueling tables, most other systems have 4 or 5, very important for the ultimate in drivability. No secondary MAP sensor and the individual cylinder trim for fuel and spark is an all or nothing calibration. In other words, you can't tailor the individual spark and fuel by rpm and/or load so it's useless in most applications. Plus the self learning can cause problems, and that only saves the tuner an hour or so anyway.

Just remember one thing. Just because something is advertised the most doesn't automatically mean it will be the best.

In your experience, does anyone offer a EFI package that has:
1. Tunable fuel curve throughout the rpm range
2. Tunable ignition curve throughout the rpm range
3. Automatically adjusts for load
4. Ignition & fuel tuning for individual cylinders
5. Allows easy transition between fuel types

Thanks for sharing.

Most do the first four real well. However adding the fifth feature narrows the perspective field a bit. I'd say today the best option that covers all five features listed would be the new AEM Infinity and maybe the Holley Dominator.

Quote:

Originally Posted by supremeefi (Post 525587)

What you said in post #32 seems to say the FAST 2.0 doesn't do the individual cylinder tuning very well. Correct?

What are the other things it doesn't do well, that you feel another brand/model does well?

Quote:

Originally Posted by Ron Sutton (Post 525591)

What you said in post #32 seems to say the FAST 2.0 doesn't do the individual cylinder tuning very well. Correct?

Correct, the Accel does individual fueling by load and rpm. The AEM Infinity does fuel and spark by rpm alone. I believe there are others that have more there than the FAST. The FAST has the least on that part.

What are the other things it doesn't do well, that you feel another brand/model does well?

As mentioned it's at a loss when it comes to drivability tuning. Will it run o.k.? Sure it will. However any given application could drive better with a more transient tunable system. Again FAST has 2 tables, most others have twice that.

Hope this helps.

Thanks Mark! :cheers:

While we're hijacking...

Where does the Holley HP EFI fall in your ranking, or do you have experience with that system?

Thanx!

Imo better than the FAST 2.0.

OK, any feedback on Edelbrock Pro Flo 2? :)

Thanks,
Don