big question

NecroWolf

NecroWolf

lost marbles member
i have a fast xfi system and my factory ecm for my ty. which would be better to use? i would need to buy all the tunning hardware to use my factory ecm or i'd probably have to buy the plug and play harness for the fast system. both will cost about the same new, so which setup do i shell out to use? the fast looks like it'd be easier to use and i think it will support high and low impedence injectors, but there are so many people using the factory setup and with the new code out i could probably get a little more help using it.
 
TYTILIDIE

TYTILIDIE

METH HEAD
Re: big question

Youre probably right. Dig, Jeff, Paul have given me personally great advice on Code 59 and they always seem to go a step further and type these formulas and what not htat I dont understand, point being, they try and help you understand the internals of everything. But set that aside, Code 59 is/can be very easy to use, I have no experience with FAST or anythign else but I highly doubt it costs the same,Im pretty sure it would cost you much less to do a stock ECM set up and you can just sell your FAST stuff. So even if you do find that Code59 is harder to use than FAST, I can almost promise you that its not hard to learn it, especially if you already have some kind of knowledge about what you are doing.
 
NecroWolf

NecroWolf

lost marbles member
Re: big question

i have the fast box already is the reason for the coast being the same at this point
 
JSM

JSM

Active member
Re: big question

Personal preference really. Each system will have an advantage and disadvantage. There are things fast does I wish ours did, things ours did fast should do. In the end the tuning of any computer is similar.

As mentioned having help from several people might push you toward stock ecm. I personally like the stock ecm as I can have a spare laying around for less than $100.
 
ViciousV6

ViciousV6

400HP/550FTLB
Re: big question

I have been running Big Stuff 3 for last 2 years and the car absolutely runs, idles, and performs better then it ever did with Ecm. The BS3 & FAST should have a faster micro-processor to access the need for fuel and air more than a stock ecm. You can control the amount of correction the ECU makes and it runs off Wde Band O2.

I have 3 friends with GN's and all went to FAST XFI and they all got better idle, and performance blew away their previous track times in a matter of 1 day at the track tuning it with the FAST.

Aftermarket is surely my thoughts on the way to go!

Not to mention it datalogs in real time of your information which you can fine tune to just what you want to see on the screen.

Ralph
ViciousV6
 
JSM

JSM

Active member
Re: big question

ViciousV6 said:
I have been running Big Stuff 3 for last 2 years and the car absolutely runs, idles, and performs better then it ever did with Ecm. The BS3 & FAST should have a faster micro-processor to access the need for fuel and air more than a stock ecm. You can control the amount of correction the ECU makes and it runs off Wde Band O2.

I have 3 friends with GN's and all went to FAST XFI and they all got better idle, and performance blew away their previous track times in a matter of 1 day at the track tuning it with the FAST.

Aftermarket is surely my thoughts on the way to go!

Not to mention it datalogs in real time of your information which you can fine tune to just what you want to see on the screen.

Ralph
ViciousV6
Click to expand...

I won't claim aftermarket is not a good alternative to many. But sometimes there is not a fair comparison either.

Did your friends try to tune the stock ECM or just hope an off the shelf chip would be fine? I surely suspect any aftermarket ecm has recieved some type of custom tuning.

I guess you can't expect a stock ecm to just work after you mod a car without some tuning efforts, then go buy aftermarket put in those efforts and claim it was because of the computer and not the fact of the tuning.

Again each has advantages over the other, depends what your after.
 
ViciousV6

ViciousV6

400HP/550FTLB
Re: big question

Well they had a custom burner and would keep making passes and then reburn a new chip make more passes and then reburn a chip.

Now they can look at all the charts find out why or where the fuel is needed or it need more at it at that rpm, map level and rerun without needing another chip pplus its all at you finger tips.

Both cars will be in the high 9's to mid 9's by mid summer and all they did was take out there modded ECM's and throw away the chip burning ideal and there they are going from mid to high 10s to 9's is pretty good as along as your able to know what your looking at with the dataruns. That is the biggest help for my truck is being able to have a comparsion of 20 runs and seeing what we can imporve on in the passes.

Ralph
ViciousV6
 
dgoodhue

dgoodhue

BuSTeD 4.3
Re: big question

Grand Nationals also have a pretty limited ECM as well. It works well for average guy who wants bolt on a few mods and have their ECM compensate, but it lack the ability to fine due the MAF limitation and coarseness and speed of processor.
 
6

6UndrPressr

New member
Re: big question

being as my car is one of them i was able to tune the stock computer quite well but as the weather changed it would get to finicky it was a constant battle to get the tune on the money..once FAST was put on the difference was quite noticeable and the o2 correction is just plain awesome its really kinda idiot proof the system
 
mattw

mattw

Active member
Re: big question

ViciousV6 said:
Now they can look at all the charts find out why or where the fuel is needed or it need more at it at that rpm, map level and rerun without needing another chip pplus its all at you finger tips.
ViciousV6
Click to expand...


You can do all of that with our ECM and few hundered $ in tuning hardware.

I have no hands on experience with any aftermarket ECMs but I have stood over other people's shoulders and watched them tune/work on them.. They look SO similar to what we can do with tuning hardware and tunerpro that there is no way I could justify the cost of buying one.


-Matt
 
turbodig

turbodig

Active member
Re: big question

I'll inject my .02...

Assuming there's no (or very little) cost difference between the two...
(which in real life, there is)

Given the choice between a properly optioned XFI (that is, it has all the features you need- TCC, trans control, wide-band, harness, etc) and the stock system...

I'd pick the FAST. In this particular case.



That being said, the community support for the stock ECU is probably better, at least in our application, anyway.

Aftermarket Factory/Vendor support is, at best, a crap shoot. Get the right guy, and things are great. Otherwise, you're in hold-hell forever, or just plain on your own.

*EDIT*
So, it comes down to $389.95 for the FAST harness vs. $515 for the ostrich/G1/ALDL cable/TunerPro/PLX wideband combo.
 
Last edited:
NecroWolf

NecroWolf

lost marbles member
Re: big question

389 for the harness? a plug and play sy harness? where you see that at? and yeah thats the big decision do i pony up for the harness or the tuning tools? and i do have a quick question about the fast, how do you adjust for the inj imp?
 
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