I ported my Throttle body this weekend. I was relatively easy I just followed some of the threads here and on Tech.. The biggest PIA was trying to get the springs all put back on in the right locations...

As far as tunning I had to lower the following tables a good amount to prevent the startup from going up to 2200rpm... The correction table kept the rpm from flaring, the delay helped it from hanging, and the decay helped it come back down faster...

{B4343} Startup Friction Airflow Correction
{B4345} Startup Friction Airflow Delay
{B4344} Startup Friction Airflow Decay

I did notice a decent amount of difference in the Off-idle acceleration, but the mid range is kinda flat now.... Hopefully tomorrow I will be able to do some VE tuning to get the mid range back in sync, WOT is about the same... All in all it was a decent mod, nothing drastic, but it was fun to do....

Here are some pics


Before


After

 

i cant tell but did you cut the shaft?? if not that gives alot like 300cfm more airflow

 

Looks great!!

 

Nice!

Dustin

 

Looks good. You've got a pm. while its off, you might as well do the coolant bypass.

 

Yep I cut the shaft!

I will see if I can find them again. The ones I found where over on tech or you can search for TXsilverado car domain page.

 

http://www.cardomain.com/ride/993398

i think page 3 has a full write up.

 

Found it on page 4. Thanks.

 

I hate to tell you this, but in picture 2 your shaft is put in backwards!!! You should not have to adjust any tune settings for idle as the flow difference with the blade closed is very minimal. The only ones I've ever had problems with had the blade slightly cocked and just needed adjustment. Something is not right... and it may leave you stranded like my first one did.

FYI, here's the how to I did with pics. https://www.performancetrucks.net/fo...light=throttle

 

Hmmm backwards, that might explain a few things.... I took the TB off and it is sitting on my bench, I am really not concerned if I screwed it up, but I followed all the thread, I marked the TB blade on the TB housing and I did not go over that line.. Hmmm, how can the shaft be in there backwards???