Comments on: Ethanol Boosted Turbocharged Gasoline Engine http://thekneeslider.com/archives/2006/04/25/ethanol-boosted-turbocharged-gasoline-engine/ Motorcycle News for Positive People Thu, 24 May 2012 12:02:49 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Al Fairbanks http://thekneeslider.com/archives/2006/04/25/ethanol-boosted-turbocharged-gasoline-engine/#comment-127489 Al Fairbanks Wed, 21 May 2008 03:15:57 +0000 http://thekneeslider.com/?p=988#comment-127489 Question which I need an answer to ASAP I am about to change the was I am building my3.3 subie motor that is going in my sand buggy. Can we run 10.2 compression ratio on Ethanol and still pull 25 pounds of boost with the proper turbos. Or, would you suggest I go a different way. I am into the motor over $20,000 at this point and am not sure I am going the right way. If you could let me know on my email address. alf@paragonpress.com It would be much appreciated. Al Question which I need an answer to ASAP

I am about to change the was I am building my3.3 subie motor that is going in my sand buggy. Can we run 10.2 compression ratio on Ethanol and still pull 25 pounds of boost with the proper turbos.

Or, would you suggest I go a different way. I am into the motor over $20,000 at this point and am not sure I am going the right way.

If you could let me know on my email address. alf@paragonpress.com It would be much appreciated.

Al

]]> By: Hangtight http://thekneeslider.com/archives/2006/04/25/ethanol-boosted-turbocharged-gasoline-engine/#comment-8052 Hangtight Wed, 26 Apr 2006 09:42:10 +0000 http://thekneeslider.com/?p=988#comment-8052 It should last fine. I've been working with highly tuned drag racing two strokes for a while, and given that the mechanical limits of a component are not exceeded, what kills engines is detonation. Boost the effective octane, raise cylinder pressures and control the inevitable detonation and power densities really start to climb. Combine these characteristics with the apparently superior combustion surface temperature control of the Pivotal engine and things start to get interesting! Mind you, it's going to make life interesting for bike designers. There's going to be plenty of plumbing! It should last fine. I’ve been working with highly tuned drag racing two strokes for a while, and given that the mechanical limits of a component are not exceeded, what kills engines is detonation. Boost the effective octane, raise cylinder pressures and control the inevitable detonation and power densities really start to climb. Combine these characteristics with the apparently superior combustion surface temperature control of the Pivotal engine and things start to get interesting!
Mind you, it’s going to make life interesting for bike designers. There’s going to be plenty of plumbing!

]]> By: C.J. Luke http://thekneeslider.com/archives/2006/04/25/ethanol-boosted-turbocharged-gasoline-engine/#comment-7949 C.J. Luke Wed, 26 Apr 2006 02:02:36 +0000 http://thekneeslider.com/?p=988#comment-7949 hmmm....not to be argumentative, but I was under then impression that turbo charging would also use more fuel. I agree that the higher compression will generate more power using the same fuel and am suprised at the power increase numbers that you listed. But keep in mind that more rpm always = more hp...but it takes more fuel to run the higher rpm. Anyhow...if those numbers are close for an increase in hp due to higher compression ratio...then consider that in my example, we boosted it by 30% with the turbo making it 'look like' an almost 800 cc engine so add those two together and you are gonna make some impressive power while it last :) hmmm….not to be argumentative, but I was under then impression that turbo charging would also use more fuel. I agree that the higher compression will generate more power using the same fuel and am suprised at the power increase numbers that you listed. But keep in mind that more rpm always = more hp…but it takes more fuel to run the higher rpm.

Anyhow…if those numbers are close for an increase in hp due to higher compression ratio…then consider that in my example, we boosted it by 30% with the turbo making it ‘look like’ an almost 800 cc engine so add those two together and you are gonna make some impressive power while it last :)

]]> By: Dodgy http://thekneeslider.com/archives/2006/04/25/ethanol-boosted-turbocharged-gasoline-engine/#comment-7899 Dodgy Tue, 25 Apr 2006 23:46:14 +0000 http://thekneeslider.com/?p=988#comment-7899 Increasing the compression ratio makes your engine more efficient by firstly making more power, for the same amount of fuel (as does turbocharging). So the same displacement engine with these 'improvements' can pull much higher gearing, or be operating at a much smaller throttle opening. A rough calculator http://www.bgsoflex.com/roughhp.html ,given a 100 CID engine gives 91 Hp at 5000 RPM at 10:1, 137 at 15:1, and if we get it to rev to 8000 RPM it gives 218 HP! Just keep in mind that ethanol is just an octane improver (anti-knock additive the same as tetra-ethyl lead was... But clean. Increasing the compression ratio makes your engine more efficient by firstly making more power, for the same amount of fuel (as does turbocharging). So the same displacement engine with these ‘improvements’ can pull much higher gearing, or be operating at a much smaller throttle opening.
A rough calculator http://www.bgsoflex.com/roughhp.html ,given a 100 CID engine gives 91 Hp at 5000 RPM at 10:1, 137 at 15:1, and if we get it to rev to 8000 RPM it gives 218 HP!
Just keep in mind that ethanol is just an octane improver (anti-knock additive the same as tetra-ethyl lead was… But clean.

]]> By: C.J. Luke http://thekneeslider.com/archives/2006/04/25/ethanol-boosted-turbocharged-gasoline-engine/#comment-7820 C.J. Luke Tue, 25 Apr 2006 16:55:27 +0000 http://thekneeslider.com/?p=988#comment-7820 An addendum....I don't see how it will make the engine more fuel effecient. There will be a small increase due to the increase in power created by the higher compression, but in the above scenario, the original 600 running gas and the boosted 600 running gas and ethanol will get very similar milage, with maybe a slight advantage going to the boosted engine. An addendum….I don’t see how it will make the engine more fuel effecient. There will be a small increase due to the increase in power created by the higher compression, but in the above scenario, the original 600 running gas and the boosted 600 running gas and ethanol will get very similar milage, with maybe a slight advantage going to the boosted engine.

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