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SVTPerformance's Chain of Restaurants
The Blower Bistro
Compression Ratio affects on supercharging
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<blockquote data-quote="tt54l32v" data-source="post: 8482841" data-attributes="member: 63786"><p>the real question in this matter should be:</p><p>engine A 8.5:1 on the highest octane gas and X amount of boost to the point it detonates</p><p>engine B 11:1 on the highest octane gas and X amount of boost to the point it detonates </p><p>Which of those makes more power</p><p></p><p>if all things are to be equal which obviously can not be simply because. an engine loses more power turning the blower harder to make more boost: so how much more power is lost turning the blower at 20 pounds compared to 10 pounds</p><p>next how much less dense is the that charge at twenty pounds</p><p>regardless of compression ratio a motor will detonate when the charge is hot enough and under enough pressure</p><p></p><p>a point for the low compression guys is that the same engine will have squeezed more air in at 20 pounds than at ten, but how much, boost is measuring restriction not airflow </p><p> </p><p>to say that a lower compression motor has more cly volume than an higher compression one is saying that it is a larger engine, but thats not the case until this volume of air is compressed.</p><p> the higher compression forced a little less air into a smaller place, the low comp forced a little more air into a larger place effectively equaling itself out.</p><p></p><p>I have not seen dynamic compression mentioned yet, which if all things were equal than the dynamic compression would have to be the same. Thus engine with less friction will make more power. The higher the boost the more friction the higher the compression the more friction.</p><p><a href="http://www.wallaceracing.com/dynamic-cr.php" target="_blank">Wallace Racing: Dynamic Compression Ratio Calculator</a> play with this a while changing nothing but the compression and boost and you will soon find that it is tit for tat</p><p></p><p>But all this is not rocket surgery. The piston engine has had its induction forced every way possible and we all know what the best combo is for the desired type of FI and fuel that we are going to run</p></blockquote><p></p>
[QUOTE="tt54l32v, post: 8482841, member: 63786"] the real question in this matter should be: engine A 8.5:1 on the highest octane gas and X amount of boost to the point it detonates engine B 11:1 on the highest octane gas and X amount of boost to the point it detonates Which of those makes more power if all things are to be equal which obviously can not be simply because. an engine loses more power turning the blower harder to make more boost: so how much more power is lost turning the blower at 20 pounds compared to 10 pounds next how much less dense is the that charge at twenty pounds regardless of compression ratio a motor will detonate when the charge is hot enough and under enough pressure a point for the low compression guys is that the same engine will have squeezed more air in at 20 pounds than at ten, but how much, boost is measuring restriction not airflow to say that a lower compression motor has more cly volume than an higher compression one is saying that it is a larger engine, but thats not the case until this volume of air is compressed. the higher compression forced a little less air into a smaller place, the low comp forced a little more air into a larger place effectively equaling itself out. I have not seen dynamic compression mentioned yet, which if all things were equal than the dynamic compression would have to be the same. Thus engine with less friction will make more power. The higher the boost the more friction the higher the compression the more friction. [url=http://www.wallaceracing.com/dynamic-cr.php]Wallace Racing: Dynamic Compression Ratio Calculator[/url] play with this a while changing nothing but the compression and boost and you will soon find that it is tit for tat But all this is not rocket surgery. The piston engine has had its induction forced every way possible and we all know what the best combo is for the desired type of FI and fuel that we are going to run [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
Compression Ratio affects on supercharging
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