Question: How Do I Lower The Compression Ratio On My Turbo?

Does high compression make more power?

A higher compression ratio — say, from 12:1 to 14:1 — means higher combustion efficiency.

Higher compression ratios and combustion efficiency mean more power with less fuel, and fewer exhaust gases..

Is high compression better than low compression?

Higher Compression Means More Work But More Pressure It shows, visually, what’s going on in your engine as it burns gasoline. In the diagram above, that lower 1-2 curve shows the compression stroke. The 2-3 line shows combustion.

Is porting and polishing worth it?

Porting – maybe worth it, depending on what you want. It’s easy to make things worse though. Polishing the inner surface of the combustion chamber in the head – maybe some benefit by reducing heat transfer into the head.

What does porting and polishing heads do?

Porting and polishing Larger ports flow more fuel/air at higher RPMs but sacrifice torque at lower RPMs due to lower fuel/air velocity.

What compression ratio is good for Turbo?

9.5:1Today, the average high-performance street or strip turbocharged four-cylinder race engine sports a compression ratio of 9.5:1, with some even running compression ratios as high as 11.5:1 or more on alcohol or E85. Modern technology allows our racing generation to get the best of both worlds.

Can you run nitrous with high compression?

Nitrous complements high compression engines well mainly because of its extremely cool intake charge temperatures. This cooling effect wards off detonation when run on pump gas in high comp engines.

What is a safe compression ratio?

The optimum intake-to-exhaust ratio could range from as little as 0.75:1 (for a low CR supercharged engine) to as much as 1:0.6 (for a very high-compression naturally-aspirated engine).

Does porting heads lower compression?

In general, head porting does not affect compression. Porting the head usually means enlarging the intake and exhaust runners, that’s it. However, some porters “work” the combustion chamber, removing material for whatever reason. This will lower the compression.

How much HP will 5 psi add?

air pressure is 14.7 psi. 5 lb boost makes that 19.7, a 34% increase. BEst case scenario is that you would gain 34% horsepower. On a stock 1600 that’s about a 22 hp gain.

Can a bad turbo cause low compression?

While a turbo leak would affect how the air to fuel ratio, what air is in there should still be compressed at a 18 to 1 ratio, I think thats a 6.0 compression ratio. This would affect the qualty of the combustion burn= power generated by the combustion process but compression should remain the same.

Does higher compression mean more torque?

This is due to the increase in brake torque at high compression ratios. Increase in compression ratio induces greater turning effect on the cylinder crank. That means that the engine is giving more push on the piston, and more torque is generated.

What octane is needed for 11 1 compression?

95 Octane. Gasoline with this octane number is known in Indonesia under the brands Pertamax Plus (produced by Pertamina), Super Extra (produced by Shell), and Primax (produced by Petronas). This type of gasoline is advisable for car engines with compression ratios of 11:1 to 12:1.

Do you want low or high compression for Turbo?

Turbo engines run lower static compression ratios to increase the amount of power they can reliable generate on pump gas. Increasing the static compression ratio greatly increases the temperature of the air:fuel mixture. The increased mixture temps increase the chances of detonation as well as pre-ignition.

What happens if compression ratio is too high?

(1) With high compression ratio, they operate at higher pressures and offer a cleaner and complete burn of fuel leading to better mileages too. However, it’s not ALL good. The higher pressure requires stronger build of the engine (in some cases heavier). Chances of knocking in the engine are higher.

Do high compression engines run hotter?

When air gets compressed, it releases energy, thus increasing the temperature inside the engine. … Hence, higher compression ratios result in higher engine temperature. Diesel engines have higher compression ratio than petrol engines and hence diesel engines are usually hotter during operation.

What does a high compression head do?

High compression heads are made with an additional feature which allows a minimal squished area between the piston and the head around the periphery of the piston which keeps the piston cooler at top RPM for less possibility of seizing and less possibility of detonation (which eats away at pistons).

How much HP gain from porting heads?

Head porting is probably the single most critical piece of adding HP. you can gain 20-30 from a really good port job. don’t polish heads. what do they charge for porting heads ?

How do I lower my compression ratio?

To decrease the compression ratio “remove material” from inside of the Cylinder head or piston top. This increases both the volumes by equal amount and hence the ratio gets decreased.