Would a ported TB be good for a tenth and 1 mph in the 1/4 mile, on an intake/catback car?

 

Yes, if the engine is modified and needs more air; IMO on a totally stock engine its a waste of money

 

The stock throttle body can support up to 400 hp, so a ported TB would not help you at all...

 

Your money would be much better spent on Longtube headers, 1.6 RR's, Madwolf Tune, Electric Waterpump or gears.

-Dustin-

 

If you port the TB thats gonna cause problems I believe. Because the throttle positioning sensor is gonna say your 25% open when your flowing 28% air?

I don't see how thats going to work out.

Also Madwolf stated he actually experienced a loss in power and does not recommend them. Some people say they are good, but I've not seen any definitive dyno testing.

- Z28WannaB

 

My own experience:
Hooker cat back exhaust - not much difference
K&N Filtercharger - not much difference
52 mm ported stock TB - woke up the car.
Probable cause - finished opening up the flow of air/fuel. The exhaust and intake allowed more air, but the tb was a bottleneck. When the ported tb was installed, it allowed the other components to work to their potential.
I gained .1 to .2 in the quarter mile.
Just my $0.02 worth.

 

Yep, lost about 15 RWHP and 10 RWTQ from a ported TB on a cammed car. This was done on separate days, however, (both runs SAE corrected) so it cannot be taken as a rule. I will do another test on the same day when I do my heads and a larger cam.