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The Pub For General Automotive Related Talk |
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#1 | ||
FF.Com.Au Hardcore
Join Date: May 2006
Posts: 1,104
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Hi Guys.....On the older engines, I am interested to know the difference in compression ratio of the closed chamber compared with the open design.
There is obviously a diffence in chamber volume. |
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#2 | |||
FF.Com.Au Hardcore
Join Date: Jan 2010
Posts: 11,271
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Quote:
two links to get you on your way 1. Compression ratio calculator. http://www.wallaceracing.com/cr_test2.php 2. Ford cylinder head data heaps of them. https://www.enginelabs.com/engine-te...sting-numbers/ |
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#3 | ||
FF.Com.Au Hardcore
Join Date: May 2006
Posts: 1,104
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Thanks for the reply....very informative, unfortunately no mention of horsepower.
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#4 | |||
FF.Com.Au Hardcore
Join Date: Jan 2010
Posts: 11,271
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Quote:
and then you risk hitting either oil or water… David Vizard has done quite a few videos on porting SBC and SBF. Years ago, he ported a 289 and got phenomenal power out of the thing Link here to start you https://www.youtube.com/watch?v=ttGQjpyAH1M Most people now go aftermarket with either AFR or TFS Twisted Wedge (beautiful) as they Unlock a ton of power in the Windsors. One of the agonies of a 347 is the amount you have to spend just to equal what a GM LS 5.3 truck motor can put out with just a cam and good headers. |
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#5 | ||
Mad Scientist!
Join Date: Jan 2005
Location: Newcastle
Posts: 2,839
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https://www.youtube.com/watch?v=RsxV4LZWlJc
I love watching the vids from these guys. The parts are listed as well. |
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#6 | |||
FF.Com.Au Hardcore
Join Date: Sep 2015
Location: nz
Posts: 1,846
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Quote:
__________________
Fgx xr8 winter white manual, gone but not forgotten 22 mitsubishi outlander XLS PHEV Au11 fairmont Ghia ported gt40p heads ,comp springs and locks Xe 264 cam,custom intake,pacemaker tri y headers 524nm torque 19 Triton GSXR manual |
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#7 | ||
FF.Com.Au Hardcore
Join Date: Sep 2015
Location: nz
Posts: 1,846
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Google T Moss head porting , he has quite a bit of info in locating water jackets and where to port for home DIY , on mainly E7TE, GT40 , and P heads
__________________
Fgx xr8 winter white manual, gone but not forgotten 22 mitsubishi outlander XLS PHEV Au11 fairmont Ghia ported gt40p heads ,comp springs and locks Xe 264 cam,custom intake,pacemaker tri y headers 524nm torque 19 Triton GSXR manual |
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#8 | |||
FF.Com.Au Hardcore
Join Date: Jan 2010
Posts: 11,271
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Quote:
Porting some GT40P heads for my 302, milled them 0.30” and got a nice bump in compression in my EB, feels nice in a mildly modified 5.0 but if you’re chasing really good power, those TFS 11R twisted wedge heads are almost essential if you’re gong 347 stroker route… Many guys on here have experience with them and can attest to the performance. |
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#9 | |||
FF.Com.Au Hardcore
Join Date: Sep 2015
Location: nz
Posts: 1,846
|
Quote:
__________________
Fgx xr8 winter white manual, gone but not forgotten 22 mitsubishi outlander XLS PHEV Au11 fairmont Ghia ported gt40p heads ,comp springs and locks Xe 264 cam,custom intake,pacemaker tri y headers 524nm torque 19 Triton GSXR manual |
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