Another tune after upgrades?

[Ponchopwr70]

Hey guys, have a question. Is another tune from Torrie needed after I added a jtsvp throttle body and underdrive pulley? I bought the truck over a year ago with a cold air intake, headers, 3" mids, and a magnaflow muffler welded in place of stock and a sct tuner with a 93 tune from Torrie. I have since added a magnaflow cat back ( I even cut the 2.5 necked down connection and welded 3" in place,) a jtsvp underdrive pulley, jtsvp throttle body and a jmb catch can. My truck runs really good but if I can gain more out of it I will consider. Just don't want to spend $200 and have it run the same.

 

[rottenronnie]

I would say no, a re-tune is not needed as the Throttle Body and U/D Pulley do not force you to make changes to Air-Fuel nor Ignition Timing.

Now if you added/deleted cats, changed the compression ratio, cylinder heads, camshaft and/or added larger injectors then: Yes.

 

[Ponchopwr70]

Ok sounds good, thank you!