tt plenum vs na plenum

[nd_aussie]

ok so i have a na plenum and i was wondering if i swap it with a tt plenum would it make a differance it also comes with the throttle bodies. also i was going to install the tt injectors in my na just for a little more umph. let me know if either of these is a good choice

[BigTDogg (MA)]

NA and TT plenums are the same.

TT throttle bodies are designed for boost, and are not the same as NA TBs.

TT injectors won't do anything for your NA without boost or nitrous.

[marty1mc]

The TT plenum has an extra vacuum port on it for the clutch booster. All you have to do it put a plug on it.

[nd_aussie]

so its a waste to get either

[BigTDogg (MA)]

The TT plenum has an extra vacuum port on it for the clutch booster. All you have to do it put a plug on it.

Right, but technically that's a fitting for the plenum. The actual one piece plenum is the same.

[marty1mc]

^Correct, only requires and end cap that you can get at any Autozone or Advance for cheap.

so its a waste to get either

If you need a plenum, then either is fine. I have the TT plenum on my conversion. I just put a plug on that end since I don't have the clutch booster. However, there is no difference in performance between them. I'm not sure what you are hoping to accomplish with new larger injectors. Unless you significantly increase the airflow through the motor, then stock injectors would be fine. You would be better off upgrading the ECU for the NA, adding headers, cat back, pop charger intake. In other words, help move air through the motor. That is about all you can do with an NA.

[nd_aussie]

already have intake exhaust ecu and chip, one piece driveshaft

[marty1mc]

Since you have everything else, headers, gutting cats, lightened flywheel would be the next improvements you can make.

[BigTDogg (MA)]

Since you have everything else, headers, gutting cats, lightened flywheel would be the next improvements you can make.

IMHO, testpipes would be better than gutting cats for two reasons: 1) if he has inspections, he can throw the cats on for inspection and run TPs the rest of the year. 2) if he doesn't have inspections, he can send them to Z1 for core credit and get products.

I'd also add a UR or ASP underdrive pulley and an HI water pump overdrive pulley to that list.

[nd_aussie]

Since you have everything else, headers, gutting cats, lightened flywheel would be the next improvements you can make.

IMHO, testpipes would be better than gutting cats for two reasons: 1) if he has inspections, he can throw the cats on for inspection and run TPs the rest of the year. 2) if he doesn't have inspections, he can send them to Z1 for core credit and get products.

I'd also add a UR or ASP underdrive pulley and an HI water pump overdrive pulley to that list.

yea the next thing i was going to do was test pipes, pulleys, flywheel

[BigTDogg (MA)]

yea the next thing i was going to do was test pipes, pulleys, flywheel

Just the crank and HI WP pulley is all you need. Anything else is just for show, and a waste, IMHO.

[marty1mc]

IMHO, testpipes would be better than gutting cats for two reasons: 1) if he has inspections, he can throw the cats on for inspection and run TPs the rest of the year. 2) if he doesn't have inspections, he can send them to Z1 for core credit and get products.

Good point. We only have visuals here, so gutted cats slide right through...