2007 LS 2.2L high pressure fuel pump
10-15-2012, 12:54 PM
#12
Senior Member
Join Date: 08-06-2007
Location: Edison, NJ
Posts: 359
Direct injection of fuel into the combustion chamber occurs when the air charge has been almost entirely compressed by the upward stroke of the piston. You need fuel pressure of well over 1000 psi to drive the fuel into the already compressed air charge.
It is a clever way of entirely eliminating pre-ignition, thus allowing turbochargers to work more efficiently with lower compression ratios.
It is a clever way of entirely eliminating pre-ignition, thus allowing turbochargers to work more efficiently with lower compression ratios.
10-15-2012, 04:35 PM
#13
Senior Member
Join Date: 10-06-2011
Location: Mesa, AZ
Posts: 1,150
Direct injection of fuel into the combustion chamber occurs when the air charge has been almost entirely compressed by the upward stroke of the piston. You need fuel pressure of well over 1000 psi to drive the fuel into the already compressed air charge.
It is a clever way of entirely eliminating pre-ignition, thus allowing turbochargers to work more efficiently with lower compression ratios.
It is a clever way of entirely eliminating pre-ignition, thus allowing turbochargers to work more efficiently with lower compression ratios.
I think you mean to say HIGHER compression ratios then past non di motors since turbo motors tend to use low compression due to the pre ignition issue created by the excessive heat in the charged air.
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