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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
28th Jun, 2012 at 08:21:52pm
PMSL!!
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 7265 Posts Member #: 1268 The Boom Boom speaker Police! Essex |
28th Jun, 2012 at 08:47:47pm
Ahhaaaa In the 13's at last!.. Just |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
28th Jun, 2012 at 09:06:16pm
There is a theory that if you run an alloy head you can get away with a higher CR. I ignored this advice though. Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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7265 Posts Member #: 1268 The Boom Boom speaker Police! Essex |
28th Jun, 2012 at 09:40:12pm
On 28th Jun, 2012 wil_h said:
There is a theory that if you run an alloy head you can get away with a higher CR. I ignored this advice though. In the 13's at last!.. Just |
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326 Posts Member #: 1323 Senior Member |
29th Jun, 2012 at 07:50:02am
On 28th Jun, 2012 Paul S said:
My computer says quite the opposite when you use tuned length runners. More space in the combustion chamber allows more air to be burnt. You just need to make sure it is clean air :) But more space in the chamber = less squish area = less efficient combustion |
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 3329 Posts Member #: 184 Senior Member Melton Mowbray, Pie Country |
29th Jun, 2012 at 10:06:17am
Oh, god lets not get into the whole squish debate again. http://www.twin-turbo.co.uk
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326 Posts Member #: 1323 Senior Member |
29th Jun, 2012 at 12:30:35pm
On 29th Jun, 2012 Ben H said:
Oh, god lets not get into the whole squish debate again. its only one of the myriad of parameters that make the thread question sort of irrelevant Compression ratio is only one factor in a specific engine spec. unless the detailed spec. of the engine is given , then the thread question is basically open ended |
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520 Posts Member #: 2093 Post Whore Grenoble, France |
16th Jul, 2012 at 02:39:01pm
Unless you are aiming at fuel economy at light loads the CR basically defines how close you can reach the best power ignition timing at high loads before engine starts pinging. But this data depends on so many parameters that it's difficult to predict without known experience on very similar engines.
std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm |
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 834 Posts Member #: 2017 Post Whore Warwick. |
16th Jul, 2012 at 06:13:57pm
I read these kinda topics with interest. Did briefly skim over the otto cycle in uni' but iv since forgotten most/all of it.
David. |
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 1137 Posts Member #: 1450 Post Whore Near Paris - France |
16th Jul, 2012 at 08:37:09pm
For a limited power expectation, you're better off with a higher CR and low boost (as you said : off-boost drivability, economy)
Rusty by nature
On 23rd Jun, 2008 paul wiginton said:
They said "That sounds rough mate." I said "Cheers it cost me a fortune to make it sound like that!" |
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