waltc10

Can anyone give me some instructions on how to delete the butterfly plates yourself? What changes do I need to make with my SCT tuner to get the best possible performance from this mod. I already have the 93 octane JLT cold air intake tune from Fred at Evolution Performance.

pcdrj

You might want to do a search on this as this topic has been covered recently here... and over there.

waltc10

I saw a brief overview on how to do it, but i was looking for a little more detailed approach. If any one could help out by telling me how to remove the plates or to adjust the tune it would be greatly appreciated.

CrazyAl

You can't make the changes with the tuner yourself. You have to get a tune that is designed for the butterflies being removed. I know Brent @ Brenspeed has this, I would assume that you could get it from some of the other big name tuners also. Ask Fred @ Evo, he can probably get you the tune you need.


As for removal, it is pretty straightforward. Have a look at the install directions at the magazine website that I linked above. As you can see, the "delete kit" looks identical to the stock parts, just the butterflies are gone and they painted it black.

So, to do it yourself:

Remove the OEM butterfly assemblies from the car so you can work on them. Remove the rivets/screws that secure each butterfly "disc" to the central shaft, then take off the discs themselves. Once all the butterflies are gone, slide out the central shaft along with the levers and such that are attached. Now you have two metal castings that have holes in them from where the shafts traveled. You then have to block off these shaft holes. I would weld them up, then grind the weld smooth with the ports. I suppose you could also clean everything very well and then fill the holes with high-temp epoxy, such as JB weld.