Search found 607 matches

by AbeFM
Thu Mar 25, 2010 10:26 pm
Forum: FreeEMS Hardware Dev
Topic: We need to lay out a basic board
Replies: 44
Views: 58544

Re: We need to lay out a basic board

Yep, agreed. It certainly IS going to change though, so getting the ground work in and figuring out what the pin state anomoly is is pretty important in my eyes. Before I noticed them doing weird things at start up I wasn't concerned. But since then I want to understand the hardware, if not, we are...
by AbeFM
Thu Mar 25, 2010 10:04 pm
Forum: Pit Lane
Topic: Gauges, what and why?
Replies: 10
Views: 17249

Re: Gauges, what and why?

Depends what it is - some stuff a gauge is a lot better - you don't have to think to interpret it (about the middle is right), and, it's easier to integrate a sweeping motion in your head.

Now, 4-ish idiot lights and a two line alphanumeric might rock, it'd pop up the issue when there was an issue.
by AbeFM
Wed Mar 24, 2010 11:21 pm
Forum: FreeEMS Hardware Dev
Topic: We need to lay out a basic board
Replies: 44
Views: 58544

Re: We need to lay out a basic board

Requirements: 1) Power supply 2) 6 analog inputs (CLT, MAT, TPS, MAP, TP, Batt) I'd love to see lots of inputs. This allows maximum flexibility and playing with now. How much overhead is involved? 3) 6 injector outputs 4) 6 low current ign outputs *no high level coil drivers on board, these should b...
by AbeFM
Wed Mar 24, 2010 10:51 pm
Forum: FreeEMS Hardware Dev
Topic: Injector Control Options
Replies: 245
Views: 217369

Re: Injector Control Options

Water hammer in the fuel rail would be hard to detect if there is a fuel pressure dampener on there. Also depends on the injection setup ie sequential vs batch. I've certainly heard tales of injector starvation due to this - people removing the damper and losing a piston/valve. So perhaps you can r...
by AbeFM
Wed Mar 24, 2010 9:06 pm
Forum: Pit Lane
Topic: Gauges, what and why?
Replies: 10
Views: 17249

Re: Gauges, what and why?

I, too, find my gauges good mainly for getting stuff set up. Learning the car, making calls on new set ups. Things like over/under boost are really handy to know, as is speedo. Temps are great on street car/long trips use. I would love to have a ECU with enough inputs (perhaps the thing pictured abo...
by AbeFM
Sat Mar 20, 2010 9:49 am
Forum: Pit Lane
Topic: Gauges, what and why?
Replies: 10
Views: 17249

Re: Gauges, what and why?

I've always really wanted to just have one screen, running tuning software, and an ECU capable of dealing with ALL the sensors I want. Then fuel pressure, GPS coords, or whatever I want would all live on a screen where the factory gauges now are. My sound system would be controled by that, as well. ...
by AbeFM
Sat Mar 20, 2010 9:47 am
Forum: Pit Lane
Topic: Gauges, what and why?
Replies: 10
Views: 17249

Re: Gauges, what and why?

http://abefm.smugmug.com/Miata/Modifications/Guages-and-cockpit-photos/IMG1909/814488018_FTTy7-XL.jpg Left to right: Fuel, Speedo, Odo, idiot lights, (under these the unseen row of LED's for wideband with a fast response), tach, with CEL replaced with the knock sensor light, coolant temp Then the t...
by AbeFM
Wed Dec 16, 2009 1:02 am
Forum: For Sale
Topic: DIYEFI (Fred's) 1990 Volvo 740 Wagon [SOLD!]
Replies: 7
Views: 26768

Re: DIYEFI (Fred's) 1990 Volvo 740 Wagon

Sad!!! I'll miss the old girl.

You shoulda got the turbo. :-)
by AbeFM
Fri Dec 04, 2009 1:50 am
Forum: Lounge
Topic: Daily WTF
Replies: 267
Views: 553064

Re: Daily WTF

Wow, 62/38% Weight dist? Good lord. :-)

Curious, you mentioned big gains on engine management alone - what are the before/after numbers with the VEMS?
by AbeFM
Wed Dec 02, 2009 10:08 pm
Forum: DFH
Topic: DFH - Defacto FreeEMS Hardware in KICAD
Replies: 376
Views: 350026

Re: freeEMS_1.0 rev A KICAD

I'd say that sounds reasonable, but I'm also still flying blind on much of the overall circuit. For example, just because a CPU pin can drive 20ma doesn't mean it won't do it with out some resistance. So your 12V signal may be less than 12V. I might also guess that the 12V signal isn't a CPU pin, s...