I never added anything to affect the engine performance of my 08 tC, but want too on my tC2. Because the tC2 has higher compression ratio than the tC1,
does that mean more gains in hp and torque when BPU ( basic Performance Upgrades) are added. such as Intake, Header and Exhaust????

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well if you go Natural Aspirated route, high compression is your best friend usually for BPU.

 

Im pretty sure it doesnt.

 

new ecu's r too smart they just correct all the changes u made.

 

higher compression does make more power. also makes more engine heat and stresses parts a bit more. adding bolt ons will net you about the same number of horses sometimes a bit more. i suggest getting 1 step colder plugs, 180* thermostat and a 93 octane tune. timing can be played around with more and get even more power out of the higher compression set up.

im going with a higher compression set up with one of my cars. should be a gain of 75hp+ with a combination of higher comp. heads and cams.

 

A super old thread I know, but came across it by accident, and wanted to add to it.
Back in the day, (60s+ 70s) there weren't many people turboing, because gas was cheap, and full of octane.

High compression, (10-12 to 1) was normal for the gear-head performance orientated, and was common on lots of street cars. 350-400 HP plus, was easy to achieve, and was in many a street driven vehicle. High compression gives great throttle response, and can even increase gas mileage, (when used correctly). It was also needed when performance camming a normally aspirated eng., which would see see higher RPMs, than stock. They were fun times for people who enjoyed driving a performance car.

Unfortunately it all ended (thanks to the tree huggers), that brought us lo-octane unleaded fuel. Needed for cars when Detroit was forced to install that God-awful catalytic converter plug, in our exhaust system. Most performance cars went away for almost 20 years after, until OBD2 came about, and the computer cars became more developed.
Now, with the advent of the ECM, you can run crap gas and not run into the dreaded and dangerous "detonation", that use-ta eat up pistons with regularity. And turbos are the modern answer to "hi-compression", cause you can run lo-compression fuel W/O havoc, and when more power is desired, when the turbo is spooled up, it becomes a hi-compression eng. And if detonation becomes present, then the computer will retard the timing, boost, and fuel accordingly. Of course the power will go down too, that's why you need good gas, when you really plan on beating or racing your engine.

So, in a sense, high compression is good, but today, on a normally aspirated eng., it needs to be calculated into the ECM to use it. (My 2 cents on the topic)