I'm going to measure between the t'body and blower and see if there's any restriction at WOT. I've heard the t'body can be a restriction on a suck through app when it may not be in a blow through application at the same power level.

 

Oh ya, big difference between a suck through TB and a blow through.

 

Back a few years ago, 90mm t'bodies were an upgrade on the high end MP112/122 builds. Don't remember the numbers, but lots of folks did the upgrade. Based on my vette setup, I'm guessing this one will be over 700 fwhp. That's a lot of air sucking through a t'body designed (LS2) for 400 engine HP. CAI may need an upgrade too. I've seen how, even a dirty air filter, can make a big difference in intake air flow rates.

 

Maybe I'm missing the point, but if you port you TB or even buy a larger one...and then bolt it to the 90mm intake on the blower, aren't you just moving the restriction a few inches? Unless the blower inlet is 100+mm then what is being accomplished?

If I run a 4” pipe and taper it down to a 3 ½” inlet tube..then I’m still restricted.

 

You may be missing the point....or you may be spot on. I don't know. Are you sure I'm wasting time/money? I'm just trying to remove restrictions on the intake side. I've spotted one already (air filter) and am remedying that one this week. I'm going to take vacuum readings between the t'body and blower. I have a ported t'body (from my vette) to swap out and see if there's any difference. It's a grand total of $100 bucks to get a t'body ported. I've heard throttle response is enhanced with the port job. We'll see.

 

I think you could enhance it more just playing with the tune.

 

I've heard response is better as well. I've never had a ported TB to see for myself. If you could get the inlet on the 2300 to be opend up to say 90mm or even 100mm then I think you will be making progress. I dont think you're wasting money at all I just think the porting needs to be carried all the way through the intake tubing (TB, blower inlet) to get the most out of it.

 

I'm just trying to get everything as good as I can get it before fooling with the tune. In the grand scheme of things, 100 bucks is chump change. If you look at a ported t'body vs a stock one, you can see where airflow improvements are possible. An increase of 1.5psi with a better air cleaner tells me that improvements on the intake side can be beneficial.

 

While this is all true, our trucks dont have a IAC. They use the TB blade to control idle airflow, if you hog it out you are going to cause some issues that will need corrected for in the tune. Your engine is going to pull more air around the blade at idle so you will have to command the blade to not be open as far at idle.

 

You're preaching to the choir here. Exactly why I'm try to minimize vacuum/restriction before the blower (through a better air filter and ported t'body) and THEN have the tune tweaked.