Cold Air Intake

[DVS LT1]

Originally Posted by GTR2b

Yeah, there are lot's of mods for cars that are expensive that have relative small gains. Take the BBK Throttle Body for the LT-1 Chevy, it's $309 from Summit and a gain of what 7-10hp.
So what? If someone wants to get a performance upgrade for their car, what's wrong with that?

OK, bigger TB on a stock car - now there's a mod that can wait. What some people don't realise (at least in the case of an LT1) is that the intake manifold itself should be ported to match the larger TB.

And most people who replace their stock twin-48mm TB with an aftermarket twin-52mm TB don't even bother port-matching the manifold. If going with a really big twin-58mm TB its even more necessary to port-match. But unless you're taking the entire manifold off to port the intake runners as well who is going to want to do this?

This is why you'd wait until new or ported heads are purchased before getting a bigger TB. Now the intake has to come off and be port-matched to the heads (so you can port-match it to the TB as well), most likely a new fuel pump and fuel pressure regulator will be needed (possibly new injectors as well), and some pretty major PCM and dyno tuning to get the timing and air-fuel mixture just right.

Who would want to do some or all of this crap just to get the most out of a new throttle body???


Just bolt on a CAI instead.

[4ss4s1n]

So,in the end.My post was right,right?

[White Dragon]

right.