only gettin 8 miles to the gallon

Raysupra · 02-16-2010, 12:57 AM

hey If I were U and you not going for any crazy upgrades... got Get some stock 440cs again or if you research it u can maybe go 550. just remember that whatever the number is, is about what the max output hp that those injectors can handle. look around on that. your best bet is to check your timeing first.. then fuel filter then injectors

cre · 02-16-2010, 01:45 AM

How about we start with checking for diagnostic codes? http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx

It seems the accepted rule of thumb with injectors on OUR engines is desired HP + ~20% overhead. Sure, a 550 CAN do 500RWHP, but it's at a higher duty cycle than most injector manufacturers will guarantee (most people you talk to will recommend 650's for 500RWHP). Flow ratings are peak, not the max sustainable flow.

EDIT: Oh, and if you're running so rich you're shooting fireballs, I'd completely forget the fuel filter and expect to spend time troubleshooting the knock sensors and ignition system.

02-16-2010, 12:57 AM	#1
Raysupra 3" Exhaust Join Date: Aug 2009 Location: Camp Lejeune Posts: 59	hEY hey If I were U and you not going for any crazy upgrades... got Get some stock 440cs again or if you research it u can maybe go 550. just remember that whatever the number is, is about what the max output hp that those injectors can handle. look around on that. your best bet is to check your timeing first.. then fuel filter then injectors

02-16-2010, 01:45 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	How about we start with checking for diagnostic codes? http://www.cygnusx1.net/Supra/TechTi...ror_codes.aspx It seems the accepted rule of thumb with injectors on OUR engines is desired HP + ~20% overhead. Sure, a 550 CAN do 500RWHP, but it's at a higher duty cycle than most injector manufacturers will guarantee (most people you talk to will recommend 650's for 500RWHP). Flow ratings are peak, not the max sustainable flow. EDIT: Oh, and if you're running so rich you're shooting fireballs, I'd completely forget the fuel filter and expect to spend time troubleshooting the knock sensors and ignition system. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar ---> Last edited by cre; 02-16-2010 at 01:47 AM.

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