2V4V

Lag, true, so very true. There's an unfortunate tendancy to get "it" out there right now and that has killed many a fine idea. I agree 100% that if it ain't as right as you can make it, probably best not to sell it quite yet.

I'm still 'burning in' a couple of beta items of my own, so I can relate to the inevitable delays. Just wish I coulda bought the aux-box 6 months ago.

You going to OCIC?

Greg

BC

Hope this doesn't pull you guys off thread too much (your wideband convo).

Anyway - Yes - most sensors will need to be changed in thier current positions to a different brand, and some others will be ditched altogether and moved to a different location.

The TPS stays put, but its a full range potento-meter type. The DTA needs to use this as an input - the full range of the throttle movement.

Coolant temp stays put, but I think we need a different snesor.

MAF is gone. Replaced by a MAP system *especially* if you are boosting - which I will be. Manifold pressure then gets combined with the TPS for input.

Remember that the LH (well, my 89S4 at least) has two or three temp inputs, and two fo them are for the fan control unit (which, BTW, I am keeping because its a good system - just heavy). One of those temp inputs are infact used for the LH I believe -- but the lH gurus can consult on that.

The crank sensor on the flywheel housing is gone. It will be moved to the front of the engine on the crank pulley. When I get a kit, I will have to have that pulley from the kit modified with some magnets. Same with the cam sensor (there IS one on the S4s - on the passenger cam pulley backing plate - nearly impossible to get to) I will be moving that to the front of the cam belt cover in that area, so that I can change the sensor more easily. That cam/crank sensing combination will allow me nice control with sequential ignition and injection. Individual cylinder trim if I want to put 8 EGT sensors on the car! That way each cylinder is making max use of what it gets fuel-wise.

The ignition will be nice, off the shelf parts, as will the rest of the sensors. The Coils will be for each cylinder, and will be Coil-Near-Plugs from the C5 vette. The cam covers have the perfect pretapped holes to hold them, and there will be a 4-6 inch wire or less between the coils and the STOCK Beru spark plug boots (those big *** things that go down the hole).

Traction control is a nice option that I think I will use from the DTA portfolio as well. My goal is to get just above 525, but in a very safe maner with the sequential control of the engine. Hopefully I'll get 525 with less then 14psi. Way less.

Anyway, HTH. The loom is the big deal with this. Its all custom wiring and placement, and I'm sure as hell not doing that. I have a guy that said he can make it in "milspec" wiring, and also a very nice fire wall plug so I can remove it easier with my future engine removals.

Shane

You could talk to Louie Ott about his Piggyback setup. I believe Goldknight has been running that on his '85, with some success.

2V4V

Brendan,

Sounds like you're on your way! You might want to do a little Googling on wiring (most important would be insulation) for your own edification.

Never forget, "Mil-Spec" means NOTHING. The Mil has lots of specs, many of them have not been updated in decades. Many are not situationally appropriate, some are just plain wrong. It all depends on which "Spec" he's referencing. I would be more comforted by a "Race-Spec" or an "Aero-grade" reference from my harness builder.

Not trying to rip the guy at all, just get annoyed when shops trot out the term "Mil-Spec" as some sort of holy-gold-standard or something. It is just a term/marketing gimmic if the spec does not meet the need.

Find out who he's buying his wire and shrink junctions from (S-Motorsport [Raychem/Tyco]or...) and what flavor of connectors he likes (ie, Lemo or Amp [Tyco again]or...)

Of course, you probably have done all this already, so it's just for the rest of the class...

Greg

SharkSkin

True... a connector that was "Mil-spec" approved for a P-51 mustang might not be the best choice.

Lagavulin

Hmm, what kind of things do you have cookin'?

Right now it's 60/40 that I am; how 'bout yourself?

2V4V

Currently 80/20 in favor will decide in the next week or so- would like to have at least one product done enough to demonstrate when I'm there. My car has a bunch of mechanical updates, but anybody can do GTS brakes and such. I've been focusing spare time/$ on R&D - so I will win no awards for best maintained interior...

Greg

Lagavulin

SharkSkin

I've often thought that would be an unworkable solution on a positive displacement blower. Seems like a neat idea to save the parasitic HP loss when not needed, therefore saving gas... but how does the engine get air when the blower's not turning? Perhaps a bypass tube with a flappy that closes when the clutch is engaged? I didn't see any such thing on Max's car but it could be done. Would it work well? Who knows? Doubtful anyone will try it, since all of the SC setup seem to more than compensate for the power needed to drive the blower.

Has anyone kept their foot out of their SC shark long enough to get a gas mileage figure for mild driving?

2V4V

*Rob, yes I am...

Just boils down to the 'best layed plans' and such. My "other" gig is doing another record year - not gettin' rich but the 6 days a week it takes out of the schedule means less time for R&D. If I could lock myself in a shop for about 2 months with a couple of credit cards, a phone and my tools, I would make much better progress. Unfortunately, the rest of life intrudes.

L-Jet and general fuel stuff is coming first. LH requires more DA time (read:lotsa mapping) so it's out there on the *maybe* post-Christmas present list.

Just a 'chip' for a blower would require a very limited set of parameters - ie, each blower/exhaust/headwork/piston/injector/etc. Each combo would require a different chip. If you're Powerdyne doing bolt-on Mustang kits, well it'll be better, but still non-optimal. Forced induction will always require some degree of individual tuning to be optimized for any app that has been modded. In fact, unless you've dyno'd the particular combo-plate of parts involved, burning a chip for it is really a shot in the dark.

With advances in tech, nearly self tuning management systems will soon become a reality - next 2-3 years or so. Plug in displacement, injector size, forced induction or not, A/F ratio targets at specific RPMs and you can get pretty darn close to optimal with the computer handling optimizing VE tables and injector openings for a particular throttle angle. You will of course have to decide how close to the "ragged edge" you want the computer to push. But the hardware to do this (relatively) affordably is working it's way down to the hobbyist/geek/driven types who will do it just to prove it can be done.

You can feel safe about the blower clutch. Really not useful on anything but a Roots. Nothing I'd mess with.

Don't worry. I promise you'll see my stuff on Rennlist first.

BTW- I like the idea of hooking the blower to the stereo. It'll be like the scene in 'Apocalypse Now' - the helos cue up the Wagner on the PA then as the "Ride of the Valkyries" kicks in, the blower reaches maximum boost and the 928 vanquishes another Ferrari in a cloud of tire smoke. Oooh, there's a video in that for sure. All I gotta do is get my buddy to drag out his Modena for a round of humiliation. Damn it! More stuff to do....

Greg

Jadz928

Greg,
It seems you have a quite bit of thought in this...
Not to understate... but definitely you do.
My curiosity is striken, and awaiting your new solution.
Cool beans!

2V4V

Originally posted by rob rossitto
beating a pasta rocket sent shivers down my spine...well done!

Thanks, I kinda liked the idea. Might actually pull that one off, the filming will be the trick. Luckily, I have more than a few buddies in local law enforcement, so I might get a wink and a nod if we do it right. And l have them over for a screening/barbeque...


a closed loop FMS w/bigger ranges and real time updating sounds like the ticket...all plug and play, full auto just means more sensors and better logic... just process control stuff... to be really cool, a seperate processor for each cyl. and a master target table, IR interface (can use entertainment system display or palm OS/phone to monitor/ad

Don't get too greedy now. That's still a bit in the future. Better men than I are working on it though.

hate it when work interferes w/fun...but not so sure I'd opt to be locked in a shop w/only credit cards and tools...maybe a couple of hotties and a full bar, "tools"(opener, shot glass, ice machine), credit cards, etc

Don't recall eliminating conjugal visits. I guess I did neglect to mention the drawer in the toolbox that holds the Scotch.

Greg