So, to my understanding, an engine basically works like an air pump, as in the more air/gas you can get to flow through it, the more power you can generate.

I'm looking into either an L98 or LT-1 swap for my Firebird at some point when I can swing it. I've been told the HSR is a great way to get a good power increase on a stock L98, even if it's not smog legal.

Since the amount of torque a stock L98 generates is pretty massive compared to it's top end HP, it made me curious - is part of the reason for such torque because the engine is so choked up from the stock TPI intake that it can't turn this torque into HP? In other words, will a more free-flowing intake like an HSR increase both the HP and TQ? Or will it change the power band in favor of HP w/a slight TQ decrease?

I'm curious, because if that were the case, I'm thinking I could get away with using my T-5 with an L98. Any input is welcome!

 

In short form....Yes your right. The L98 is fairly restricted with TPI thus creating more torque.By switching to a free flowing induction like hsr or mini ram etc.Not only will you gain more HP potential..but you will be shifting up your torque curve as well as making it more flat and consistent. Alot will depend on your motors combination of parts to greatly affect how much of a gain or loss you will see.

With TPI that is designed to create raw bottom end torque but limit top end redline gave these cars a notorious name for eating other cars off the line...but would fall on its face past 4500+ rpm. This is why the factory hp/tq numbers were near 200hp but with near 300tq. Tpi can be made to flow more air uptop with a good amount of modding to balance things out.

Slap on a hsr or better and things really start to breathe with a good exhaust system heads and cam and you got yourself a all new animal to deal with.The hsr alone will pull to 6000rpm and still make hp, torque wont be as raw from 1000-2500 as before with tpi...but the midrange will be very strong.

Go over to the TPI forums and read the stickies about comparing tpi and other intakes to greatly explain the advantages and disadvantages to each.Based on your goals for the car keeping the tpi might meet your goals ..just dont beat too hard on a t-5 and launching with all that torque,they tend to break easy.

 

You should understand that torque and HP are one in the same and related by Power = Torque x RPM. Torque itself is NOT a function of engine speed under ideal conditions but in reality friction and flow characteristics make this untrue, which is why torque curves fluctuate. HP is an unmeasurable quantity and is simply a calculated number based on the torque, so increasing torque will inevitably increase HP as well.