mikesimpalass

I have a h/c gen 3 6.0 truck engine with the original 78mm gen 3 throttle body, my tuner told me that the gen 3 dbw tb's are hard to tune for idle/ drivability, whereas he says that the gen4 tb with an xlink would make tuning much easier. Any truth to this? Thanks!

2xLS1

iTrader: (25)

I've done a lot of those trucks with cams and never had a problem with Gen3 DBW TBs. I think they tune real easy especially compared to cable TBs.

LSX Power Tuning

iTrader: (4)

I agree

MontecarloDrag

iTrader: (3)

I have tuned a lot of them with huge cams, they all idle beautifully.
This is a little video of a cammed 2003 Silverado, cold start. I tuned the idle and part throttle in a couple hours.


If your truck isn't cammed then don't worry about idle tuning.

mikesimpalass

Thanks guys, i think ill keep my gen 3 throttle body then. For a cam i have a texas speed 228r. The engine is actually in an 86 monte carlo ss.

mikesimpalass

If i did upgrade to a gen 4 90mm tb. Which one should i use? I currently have a 04 lq4 dbw throttle body, and i will be using the x-link. Does it matter if i use a ls2 or ls3 tb? I heard of people using the gold blade tb, but i dont dnow much about them.

2xLS1

iTrader: (25)

Are you changing to a 90mm intake manifold too?

mikesimpalass

yes, i would upgrade my intake too