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		Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Superchargers \| Turbos \| N2O
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01-14-2004, 14:49	#1 (permalink)
mongrelEB Look! A flying orangutan! Join Date: Mar 2003 Location: perth Age: 30 Posts: 3,104	no title Just curious as to whether there's some sort of magic equation to determine the best compression ratio for a certain level of boost? Alex __________________ Proud TQE Operator and President of SEFAG - the Society for the Elimination of Ford Automatic Gearboxes Pacemaker headers + 2.5" exhaust EF Fairmont interior MP3 player Lowered King springs 5 speed manual EF motor Newest mod: EF Ghia wiring loom and dash

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01-15-2004, 00:55	#2 (permalink)
ebxr8240 Two SC 61's = trouble Join Date: Jul 2001 Location: Penrith,nswAus/Morrinville.NZ Age: 59 Posts: 6,360	Re: no title Hmm that depends.. Like 4 valve motors can get away with heaps of compression. But as a rule of thumb under 9 to 1 0ver 10 Lp imo...Unless you have good management and fuel is up to it etc.... __________________ Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic! . Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp.. Passengers, myocardial infarction material.. R.I.P Possum...

01-15-2004, 01:13	#3 (permalink)
not ford Registered User Join Date: Jul 2003 Location: Gold Coast Posts: 529	Re: no title Ray Hall Turbocharging has a few online calculators you might find helpful. I think the site is www.turbofast.com.au Also while you there check out the turbocharged boats :) Last edited by not ford; 01-15-2004 at 01:19.

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« NOS for 5 litre efi | Fitting blower - does compression need to be lowered? »

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