DBW to DBC
06-27-2018, 04:15 PM
#1
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DBW to DBC ICan you use a DBW ecm to run a now DBC lq9 with an ls 6 intake? If so, is it just a matter of having it flashed or??
i apologise if this is a repeat question. I made an attempt to find something like it so if somebody can point me in a direction that would be great.
i apologise if this is a repeat question. I made an attempt to find something like it so if somebody can point me in a direction that would be great.
07-08-2018, 09:14 PM
#3
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i bought a gen 4 ls 5.3 sight unseen turns out its dbw i want dbc the ecm numbers are 12589463 hdw numb 12589162 yhzs what ecm do i need to make it work i have an dbc intake and throttle body that will fit the dbw intake there both 862 cathedral port heads one was a 02 4.8 and my 05 5.3 from a roll over got ecm with the 05 didnt with the 02 can someone help me with info please
07-10-2018, 02:04 PM
#5
07-10-2018, 03:13 PM
#6
TECH Senior Member
I wonder if the OP is talking about a Gen III ECU? SOME of them, though originally DBW, can do DBC if reprogrammed if not mistaken.
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07-10-2018, 03:56 PM
#8
There really isn’t any benefit to DBC unless you simply can’t fit the gas pedal in your car. Once you turn off torque management and raise the soft rev limiter, you’d never know it was DBW. And with DBW, you can keep your cruise control.
07-10-2018, 04:26 PM
#10
Launching!
The LS6 intake allows DBC. Any DBC intake is trivially DBW as well; you just don't use the throttle cable bracket. 
The 3-bolt DBW throttle bodies fit right on the LS6 intake. I'm using such a setup. I just needed to cut the coolant barb off the bottom of the truck throttle body to make it fit. DBW has its drawbacks, but the GM implementation responds pretty quickly, and it combines the functions of throttle, IAC, and cruise into one device, with fewer wires and cables.
Assuming you're using a P59 ECM, most of those don't have the necessary circuitry to run an IAC. You may find yourself needing to swap ECMs to get one that has the necessary components.
The 3-bolt DBW throttle bodies fit right on the LS6 intake. I'm using such a setup. I just needed to cut the coolant barb off the bottom of the truck throttle body to make it fit. DBW has its drawbacks, but the GM implementation responds pretty quickly, and it combines the functions of throttle, IAC, and cruise into one device, with fewer wires and cables.
Assuming you're using a P59 ECM, most of those don't have the necessary circuitry to run an IAC. You may find yourself needing to swap ECMs to get one that has the necessary components.
07-10-2018, 05:25 PM
#11
TECH Senior Member
iTrader: (7)
No. The LS 6 was a Corvette only engine and all C5 Corvettes were DBW. The ls6 intake also found it's way on many 2002 f-bodies and thus has provisions for the cable bracket .
As was said above, all 3 bolt intake and TBs are interchangeable. As are all Gen IV 4 bolt intakes and TBs...etc...
Andrew
As was said above, all 3 bolt intake and TBs are interchangeable. As are all Gen IV 4 bolt intakes and TBs...etc...
Andrew
07-10-2018, 05:53 PM
#13
No. The LS 6 was a Corvette only engine and all C5 Corvettes were DBW. The ls6 intake also found it's way on many 2002 f-bodies and thus has provisions for the cable bracket .
As was said above, all 3 bolt intake and TBs are interchangeable. As are all Gen IV 4 bolt intakes and TBs...etc...
Andrew
As was said above, all 3 bolt intake and TBs are interchangeable. As are all Gen IV 4 bolt intakes and TBs...etc...
Andrew
What do you mean? Are you saying that the LS6 intake you have came off of a DBC car? As stated, the intake is either DBW or DBC depending on what TB and PCM you use. I think you mean that you want to use that intake with a DBC throttle body.
07-10-2018, 06:07 PM
#14
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iTrader: (7)
I'm sure you meant all '01-'02 Fbodies.
What do you mean? Are you saying that the LS6 intake you have came off of a DBC car? As stated, the intake is either DBW or DBC depending on what TB and PCM you use. I think you mean that you want to use that intake with a DBC throttle body.
What do you mean? Are you saying that the LS6 intake you have came off of a DBC car? As stated, the intake is either DBW or DBC depending on what TB and PCM you use. I think you mean that you want to use that intake with a DBC throttle body.
Andrew
07-10-2018, 11:01 PM
#15
Yes u can take a dbw harness and ecu and make it dbc setup. Ive done this on alot of swaps. U just gotta rewire the iac and tps into the ecu and retune for the swap. Just tuned a truck ecu like this for a guy in montana. Shipped ecu back to him last week.
07-12-2018, 10:42 AM
#19
TECH Senior Member
07-12-2018, 11:31 AM
#20
Launching!
As was stated above, it is not strictly necessary to convert from DBW to DBC. If you are replacing a truck DBW intake manifold with an LS1 or LS6 style intake manifold, you can just change to a water pump with front outlets, do something about the accessory routing, slice the coolant barb off the bottom of the truck TB, bend the steam line out of the way, and stick the truck TB right onto the car intake manifold. Done.
If he wants to convert to DBC for some other reason, that is fine, but there is nothing about swapping to a car style intake manifold that requires him to do so. Since he is most likely using a "0411" ECU, he can modify the wiring harness to run a TPS and IAC, but this is more work.
If he wants to convert to DBC for some other reason, that is fine, but there is nothing about swapping to a car style intake manifold that requires him to do so. Since he is most likely using a "0411" ECU, he can modify the wiring harness to run a TPS and IAC, but this is more work.
Last edited by lemming104; 07-12-2018 at 11:39 AM.