90mm Throttle Body Upgrade

[bowtie_pasta]

I'm looking at part# 12605109. Is this a direct fit (no mods) for my '06 5.3L? I did quite a bit of searching/reading of topics before posting, but came away a bit confused for my specific application. A lot of discussion was focused on the '07+ vehicles and the 6.2L.

 

http://www.summitracing.com/parts/nal-12605109/overview/

 

You can see my current upgrades in my sig and am considering swapping the TB if it's that easy. Any considerations? Thanks.

[Chris]

Nope. I'm in the process. You need the intake manifold off a TBSS or an 07+ 4.8/5.3 for it to work. I am doing the TBSS manifold/rails/injectors to get the 87 mm Sent from my Samsung Galaxy S4 using Tapatalk 4

[Jennabear]

Not a recommended mod.

[Chris]

What Jenna said. A lot of money and works best with a cam upgrade from what I was told.

[Jennabear]

I would only recommend going with a larger than OEM throttle body, if you have an FI application (even then, should be a 100mm+ TB). Otherwise, you will see no gains.

 

Keep in mind, the stock TB is good for ~550HP, most vehicles never will see that number.

[Chris]

The 75 mm is good that high? I am still trying to find better than 317 heads to run with a GT2-3 cam

[Jennabear]

Your MAF and your engine will be the limiting factors. I have seen ported/polished TBs that make absolutely no difference. Just throwing money at a part that won't give you much as far as gains, if any.

[Chris]

That's why I have you guys to alter those factors

[Jennabear]

We can't alter the limits of your MAF and your engine though.

 

Your 75mm will flow 63lbs of air/min at standard air pressure and temperature. That is roughly 630HP.

 

The 90mm will flow 80lbs of air/min at standard air pressure and temperature. That is roughtly 800HP.

 

To break it down, you will have better response out of the 75mm

[Chris]

But the MAF can be changed... The setup is still on the garage shelf

[Jennabear]

You planning on having 600+rwhp??

 

Sent from a jelly bean.

 

 

[Chris]

Eventually after I get a new DD

 

Sent from my Samsung Galaxy S4 using Tapatalk 4

 

 

[Gurrzt]

What Jenna said. A lot of money and works best with a cam upgrade from what I was told.

+1 on that, also if your vehicle is an automatic, try a 3600 2.5 str. stall coupled to a sf29 race grade flexplate.

[travishale84]

lots of good info on here, i wish i knew where to find cams and torque converters and other goodies to make my 4.8 wake up... i know id love to get new gears...

[Gurrzt]

lots of good info on here, i wish i knew where to find cams and torque converters and other goodies to make my 4.8 wake up... i know id love to get new gears...

Here is the product company I purchased for Sara (2001 Z28):

 

http://www.converter.cc/

 

If you change your TC, ALWAYS purchase a name brand that is proven.