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white91gt · 02-28-2004, 02:51 PM

Can someone explain the ratio on a FMU.

If it is 12:1 and you have 6psi of boost this causes the FMU to raise fuel pressure to 72psi, right ?

Is this 72psi in addition to the factory regulators 38-40psi ? or is this 72 psi total ?

Also, what size injectors would be recommended for a stock cylinder head 302 running 6 psi,GT40 intake, 65mm throttle body, 73mm MAS, 1.7 roller rockers, 15/8 equal length shorties, and dynomax exhaust?

Should I ditch the FMU and go with a tune ? What is everyone's opinion ?
Thanks in advance.

02-28-2004, 02:51 PM	#1
white91gt Registered Member Join Date: Aug 2003 Location: Grand Bend Ontario Posts: 14	FMU Ratios and injector sizes Can someone explain the ratio on a FMU. If it is 12:1 and you have 6psi of boost this causes the FMU to raise fuel pressure to 72psi, right ? Is this 72psi in addition to the factory regulators 38-40psi ? or is this 72 psi total ? Also, what size injectors would be recommended for a stock cylinder head 302 running 6 psi,GT40 intake, 65mm throttle body, 73mm MAS, 1.7 roller rockers, 15/8 equal length shorties, and dynomax exhaust? Should I ditch the FMU and go with a tune ? What is everyone's opinion ? Thanks in advance.