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[firehog383]

My 58 TB just showed up at the door. What a difference between the 58 and 2012 stock CVO TB. Casting is smoother inside and better port runners. I spent a little time smoothing the transitions inside, but really didn't need much work. I'm almost tempted to put the stock one tune it and replace it with the 58 to see how much of a difference it would make.

[FlaHeatWave]

Would be good info to have a "back to back" comparison 

[fastfreddy]

I may have to be corrected but depending on motor work only gains are going to be in the upper RPMs with the 58 

[FlaHeatWave]

I may have to be corrected but depending on motor work only gains are going to be in the upper RPMs with the 58 

Fast, I agree with you, although it would be great to see some back to back Dyno sheets for comparison.

firehog, what injectors are you going to run?

[firehog383]

5.3 injectors.

[TorqueInc]

  58 vs 50

obviously its 8mm larger

the port openings on the 58 are larger....1.725 ish compared to the 50 @ 1.6 something....they are all over the place

spigot diameter is larger CVO diameter needing the larger provided flanges

requires a different backing plate/air cleaner or you can modify the stocker

  There is no reason not to go with the 58 it does not hinder low rpm performance provided the tuner knows what he is doing

[firehog383]

I get the 8mm bigger part. I was pleasantly surprised at how much better the smoothness of the inside casting is compared to my stock one.

[Fullsac Performance]

5.3 injectors.

If your going to run the 58 with stock cams and heads, the stock injectors are more than sufficient.

Steve@fullsac.com

[fastfreddy]

When I had the heads done also had the stock TB port matched, at the time it seemed to be the thing to do

[firehog383]

Its going on a 113 600 lift cam

[Fullsac Performance]

Its going on a 113 600 lift cam

5.3s will be needed at that power level!

Steve

[Gandrtravis]

I have a 113 with the .600 cam and when I changed to a se 58mm and 5.3s this was the difference helped a bit up above 4000rpm a bit

[Gandrtravis]

The numbers may seem low because of the dyno I was on but you can still see the % of gain

[TorqueInc]

The numbers may seem low because of the dyno I was on but you can still see the % of gain

  Knowing that dyno......looks pretty stout 

[Gandrtravis]

Thanks it works really good above 3000 but I'm always looking for more I think we all are lol