I'm looking at power options

[steve86gt]

Literally!!! Some people do search and nothing pops out or even answers the question!
So sometimes people have to ask and its people like you cole that drive people away from forums.

OP , ive had a avo stage 2 kit put on my 86 roughly around 4 months ago and its a daily driver , no problems what so ever
Even going to put a e85 tune at the end of this month

[Spartarus]

Originally Posted by 3ndagor

would you care to explain more on the positive slope and lack of linear power on centrifugal superchargers?

Yes. The term "linear" is thrown around very loosely, and it's tough to explain without writing a book. I'll give you the highlights, and it can be further discussed if you lose me.

Centrifugal superchargers are just a belt-driven centrifugal compressor. On these units, boost increases from almost zero at idle, to maximum at redline. This variable boost is just how centrifugal compressors work. The only way to speed up the compressor is linear acceleration, along with the engine. Airflow from centrifugal compressors increases quadratically in relation to speed. The engine is a fixed-displacement air pump. It's airflow (in a very simple sense) increases in a linear fashion as revs climb. Functionally, this disparity creates a torque curve with a positive slope. More on why that matters later.

Take a positive-displacement supercharger. It moves a fixed amount of air per rev, much like the engine. Functionally, this means fixed boost as revs climb, and therefore a flat torque curve. (In real life it's not perfectly flat, for reasons I can get in to, but it's close enough)

Why does that matter in a car? Put it this way:

Very simply put, Power = torque x speed.

"Speed," in the case of an engine, is revs. If you look at a dyno graph, you have revs on one axis and power on another. (the torque is almost always graphed the same way.) Remember all the way back to algebra class. In order for power to be linear, only one variable can change at a time. This means any linear section of the power curve is the result of a dead-flat torque curve.

Power doesn't accelerate a car, it's just a metric. Torque does, specifically, torque at the wheels. Remember back to physics class. Force = Mass x Acceleration. Force and torque are functionally identical.

Cars have a clever trick to turn power into usable torque. Gearboxes. If P = TS, then if you lower Speed, torque must increase. Eventually, you reach the axle and the wheel. Axle speed is less than engine speed, and torque is higher. Voila, power becomes useful.

Your car has 6 fixed reduction ratios that don't change. (and 1 final drive but it doesn't change either so forget about it.)

Now, apply this logic to a race car. You're coming out of a corner, you put the car in any gear, and put your foot down. If the torque curve is flat, then regardless of engine speed, the torque delivered to the wheels in that gear will always be the same. This makes for a very good, very predictable race car.

Now take a centrifugal supercharger. Boost climbs as revs increase. The overall reduction ratio in a given gear is fixed, so torque at the wheels increases as engine speed increases. With each climbing rev, the car pulls harder, all the way to redline. This makes a centrifugal supercharger "feel" very rewarding to drive on the street, but can contribute to less predictable, and therefore less desirable, track handling.

Imagine coming out of the same corner, right at the limit, and burying the gas pedal. How much torque is going to be delivered? Dunno, it depends. Better straighten out as the torque comes up, too, or she'll break loose. That, or modulate the pedal carefully. Either way, it's going to mean more work, and more variables.

I hope that clears the waters a bit.

[Captain Snooze]

Originally Posted by 3ndagor

Cops in my region are anal

I hope they are gentle.

[Sleepless]

Originally Posted by rookie

1. Sell your 86
2. Buy Mustang
3. More power

This is a fine option, but I hate the extra 1000 lbs penalty

[OkieSnuffBox]

Originally Posted by steve86gt

Literally!!! Some people do search and nothing pops out or even answers the question!
So sometimes people have to ask and its people like you cole that drive people away from forums.

site: (enter the web site address here) then type your keywords.

The google search of a forum is typically better than the vBulletin software.

[3ndagor]

Originally Posted by Shark_Bait88

I know plenty of NA Toyobarus chasing down much "faster" cars at track days.

yes I know