D.b.w vs. D.b.c

[CamaroChris]

Who has what, and what do you like better? I have a 2000 PCM and harness and a 2004 DBW PCM and harness trying to decide which to use. my camaro is a DBC and I love it. how is the DBW for responsiveness when you give it a quick bump of the throttle? is it laggy? I know DBW is a cleaner looking set up and the cruise is easier to set up. dut how is the drive? also I am one day going to turbo my suburban to be kinda out there of a burb' does the DBW work well with boost?

[BR3W CITY]

I run dbw and actually ended up loving it. Once I figured out my initial TAC problem, its been easy to work with. It was nice just tucking a wire and running it to the pedal where ever I wanted, plus it allowed me alot of freedom in pedal location. Mine is extremely responsive, IMO more so than most dbc cars I've had before. Because the only resistance against the pedal is the spring tension, its a "soft" pedal. Going down the road it seems to function well, the biggest issue is that sometimes it can feel a bit touchy if your just trying to tip-in on a big cammed engine..but after an hour or 2 behind the wheel you kinda tune it out with your foot.

[Shon]

its all in the programming!

[duwem]

Anyone got cruise control to work with the DBW setups?

Looking at the schematics it looks like its handled by the TAC module and ECU and you just wire up the 3 wires for the switch on the column to the Tac module.

Is it that simple or is there a bunch more involved?

Thats one of the big reasons I'm leaning towards leaving the DBW setup on the engine I just picked up.

For responsiveness you can control the throttle blade opening speed in the computer on the DBW setup.

[usmcchevy]

DBW CC how to:

http://67-72chevytrucks.com/vboard/s...d.php?t=398006

[duwem]

Thanks!

So if it I didnt want to wire it into the column, 3 switches on the dash and a switch on the brake pedal all wired into the TAC module would do it then?

[usmcchevy]

Originally Posted by duwem

Thanks!

So if it I didnt want to wire it into the column, 3 switches on the dash and a switch on the brake pedal all wired into the TAC module would do it then?

Yep, 3 switches. 1 on/off and 2 normally open/momentary close. The 4 connection brake switch is used to enable torque converter lock up. For CC the TAC just needs 12V when the pedal is pushed, which your normal brake switch would do.

[68GMCCustom]

def in the programming. The DBW setups have delay built into the program...so a quick punch and let off...and it doesn't even move.

[softballnrd27]

You got a DBW how to w/o the cruise?

[usmcchevy]

Originally Posted by softballnrd27

You got a DBW how to w/o the cruise?

As far as how to hook up DBW?

[softballnrd27]

Yep, lt1swap.com was very vague

[usmcchevy]

Originally Posted by softballnrd27

Yep, lt1swap.com was very vague

Its vague because its simple If you start with a DBW harness there are plugs for the TAC and throttle body that you just plug in. Then there is another harness that connects the TAC to the gas pedal-it really is plug and play.

If you are missing anything in the system. The only way I know to get the correct pedal/TAC or PCM is to have the VIN from the donor vehicle so you can get the right part number for the missing part form the dealer. I'm sure there are other ways, but after reading some hoar stories (Jim_PA and others) mixing components just sounds like a nightmare I do not want to have. If I were in your situation I would get on car-part.com and find a salvage yard that has the pedal/TAC and PCM all from the same 04 truck. The yard I got my TAC from sells all "computer boxes" for $25 each and gas pedals for $30.

[TR65]

Guys,

There is a big problem with the cruise on late model engines (mine is a 2005 LS2). The late model cars have the cruise interlocked with the emergency brake. The cruise won't engage unless the ECM has a signal that the e-brake is off.

The problem is that the ECM is not connected to the e-brake. It picks up the signal on the serial bus from the BCM or other module.

I haven't figured out how to get around that yet, short of trying to hook up a BCM. The tuning software doesn't seem to be able to disable that either that I know of.

(You can try it on a late model car. On mine one click of the e-brake while the cruise is engaged and it drops the cruise. If the e-brake is one click on the cruise won't engage.)

(The same problem occurs with the case learn procedure. The ECM requires a signal that the e-brake is set before it will run the case learn.)

If anyone figures this out please let me know.

TR

[usmcchevy]

TR65, Gen III with a TAC are very easy to hook up, Gen IV like your LS2 sound like a pain. This might help if you haven't already seen it, Good luck:

http://www.ls1tech.com/forums/conver...rol-w-dbw.html

[TR65]

Originally Posted by usmcchevy

TR65, Gen III with a TAC are very easy to hook up, Gen IV like your LS2 sound like a pain. This might help if you haven't already seen it, Good luck:

http://www.ls1tech.com/forums/conver...rol-w-dbw.html

Thanks Marine,

That gives me some things to think about. My E40 is flashed to the VIN of the 2005 SSR that it came from, then I modified the tune from there. I was using the old first rule of engine swapping, "make the engine think it is still in the car it came from". Maybe if I went with a 2006 Trailblazer SS it might not require the e-brake interlock.

TR

[CamaroChris]

So my DBC harness is from a 2000 yukon, the DBW is from a 2002 yukon. Neither use the serial data **** right?

[ls1nova71]

Originally Posted by CamaroChris

So my DBC harness is from a 2000 yukon, the DBW is from a 2002 yukon. Neither use the serial data **** right?

Not for cruise. But since your DBW is from a 2002, you need all of it to be from a 2000-2002. Is tour TAC the all plastic type?
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[CamaroChris]

Originally Posted by ls1nova71

Not for cruise. But since your DBW is from a 2002, you need all of it to be from a 2000-2002. Is tour TAC the all plastic type?
Posted via Mobile Device

I could not tell ya, I will look when I get down to my shop.