Which System for budget

[Taylor1969]

For the $3000 dollars that a fully running system costs you may be better off finding an LS1 and having it rebuilt...



Edit...

its early - I realized that you aren't running a SBC - please disregard my post.

[MonzaRacer]

As for disregarding megasquirt and "open source code" it really isnt super open unless your int oprogramming C+ programming language.
Megatune is a completely written program just dont try to use it with Vista yet.
I have seen 3 very large engines (540, 777 and a 803) all run on Megasquirt.
The basics you need to look at are what your trying to produce power wise and match injectors and as for the differences between batch fire and sequential is moot at 8000 rpm under boost.
After seeing the 777 run with a dual injector (ie 8 injectors and NOS fogger setup ran through propane injectors) with a Megasquirt I was VERY impressed and the fact it made 900+hp at theflywheel off the bottle and 1398hp on and it was very tractable around town as the guy had to cruise it at some local cruise joint before running at a track.
The 3300 lb car ran tire smoking 5.40s and got 11 mpg cruising town(had to make 5 complete trips through that town and it had about a 9 or 10 mile circuit.
You can order MSII built and ready to install from DIY and they carry the Innovative wideband and as for not needing it on the street for cruising and for regualr use ,that completely silly.
If you want to look at it take a graph paper and run a 10 by 10 square and plot AF/R on it ,,,then take some graph paper and do it over a 50 by 50 (actually you should use 100 by 100 graph to be true).
See if you lookat a 10 by 10 you only have 4 up and 4 down to correct, tons of easy over under fuel potential.
Now if you look at an O2 sensor (regardless of the computer used to read/operate) your band range for high/low is above .8 volts and below .2 volts,,,not a very good plot point and very crude.
Now with 2.5 volts on both sides the computer has a much greater chance of seeing a potential lean out AND being able to correct for it or give warning/shutdown. The computer is goingto read in .100 v over a larger scale and give you better runnig AF/R and be able to protect your engine.
Your willing to spend up to $3k on a system but sweat the fact that a
$150 dollar sensor can/will give you better control/protection from fuel problems?
While you may spend ,what $350 over using narrow band but the WBO2 can keep you from frying an engine/component completely, I wouldthink this would be a pretty much nobrainer and as for spending $3k on a system because you dont understand the reason for open source code is kind of narrow minded.
DIY has several setups and what you buy depends on what all you want to control and theneat thing about the MSII is that the ability to upgrade it is nearly endless and continuos. Heck they are gettingthe bugs worked out of COPS ignition and everyone is using those on LSx engines. I am just saving for my MS as I sat back and decided that I like the dare to be different motto.
I also liek that if pretty much anything in my MS can be bought at local electrobnis store or from DIGI -KEY for chump change to repair but if your set up is well though out rather than well bought out you should have very few problems and the other reason I like it isI am working on a set up to allow flex fuel be incorporated into it.
I had a guy tell me his BS3 could do it and it wouldnt even start,, man was he POed. And he spend about $5k on his BS3 and assorted hardware and went to one of the big shops to have it installed and tuned.
So far the limit I have reached in tuning is with injector sizes and being compatable with both E85 and gasoline.
And we found that being able to run a fuel sensor kept the AF/R much closer.
Good luck in your search.
Lee

[dannyho]

yea, I've come a long way since i started this thread. But I've leaned towards something in the realm of MSII. check out VEMS, it came out of the megaquirt project but they took it to a whole different level. Not open source, anymore. and the forum support isn't there, but they have a wiki. www.vems.hu

[Monzsta]

Bump. So what did you end up with?

[dannyho]

I didn't get to get anything done until this summer because I was finishing up an engineering degree and it left me with no time. At any rate I'm going to be getting VEMS. But I won't be able to give an eval of it for a long while. I'm going to paint it soon before it gets cold, then put the efi in it.

[Monzsta]

I'll be trying out the Megasquirt2Extra, driving two Ford EDIS coils directly for ignition. Launch control, flat shifting, and table switching (for E85 use) was the appeal to me.

[68Formula]

I'll be trying out the Megasquirt2Extra, driving two Ford EDIS coils directly for ignition. Launch control, flat shifting, and table switching (for E85 use) was the appeal to me.

You may have already thought about this, but be careful switching fuel types. If you're not running the tank dry you won't have E85 after it mixes with the gas (you'll have something in-between depending on what residual was in the tank).

[Twentyover]

Running a Pro Flow on my ZZ4. They have 4 vacuum maps that let you adjust timing and injection pulse width (as a percentage of their baseline.) They also have outside services that can locally modify the prom that establishes the baseline.

Think the intent of pro-flow is to get it running acceptably well and reasonably tunable with a minimum amount of work. Some don't like to, or have time to, or expertise to spend hours fiddling to get the best pulse width for a given engine rpm and manifold vacuum, some are happy with pretty close. Those that want more will ask for more maps and finer controls, and will probably spend time on the rollers to optimize the system



Note- this message is in response to #19. Didn't rea;lize this thread was this old