Why Not Bigger Than 1600?
05-06-2003, 09:31 AM
#12
Senior Member
Join Date: May 2002
Location: Okinawa, Japan
Posts: 4,928
Originally Posted by j9fd3s' date='May 6 2003, 02:37 AM
the crazy pfc guys like dragon are running 850 x 1600 x 720. the pfc can run 6 injectors just fine.
mike
mike
05-06-2003, 11:17 AM
#13
Senior Member
Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by jspecracer7' date='May 6 2003, 06:31 AM
[quote name='j9fd3s' date='May 6 2003, 02:37 AM'] the crazy pfc guys like dragon are running 850 x 1600 x 720. the pfc can run 6 injectors just fine.
mike
mike
i forgot the throw that "this is close to math, answers may vary"
mike
05-14-2003, 10:19 AM
#15
Senior Member
Join Date: Sep 2002
Posts: 2,550
We’ve found that running the 850 secondary injectors in the primary ports doesn't work to good because they sit up to high in the modified primary fuel rail. This causes the spray pattern to get fucked up and the car will idle rich no matter what you do because of poor fuel atomization..
So, I'm running the stock 550's in the primaries to 50%, at that time it does the change over to start firing the 1680's in the secondarys, the same 2 wires are running parallel to run the other 2 720's in the primary runners for a total of 1680cc of fuel to the secondary ports and 1270cc of fuel to the primary ports for a nice balance of air and fuel.. My power fc thinks it has 2400cc injectors in the secondarys..
(ps. I love the datalogit) I get really good gas mileage for the size of the port I'm running and only hit a max of 19 knock according to the commander after 15+ 1.3-1.5 kgcm runs. (Did I say I love my wide band and water injection) I'm also running 2 x walboro fuel pumps with two -6 fuel lines with earls inline filters running to each fuel rail and then in to a aeroquipe fpr and one -6 return line. At 1.5 kgcm boost with the T70 I'm hitting around 78-79% on the injectors at 54 psi base fuel pressure. Now I just need to get a new wastgate spring so we can take the boost up to 1.7 or so and see what happens..
So, I'm running the stock 550's in the primaries to 50%, at that time it does the change over to start firing the 1680's in the secondarys, the same 2 wires are running parallel to run the other 2 720's in the primary runners for a total of 1680cc of fuel to the secondary ports and 1270cc of fuel to the primary ports for a nice balance of air and fuel.. My power fc thinks it has 2400cc injectors in the secondarys..
05-15-2003, 02:30 PM
#16
Senior Member
Join Date: Sep 2002
Location: Dubuque, IA
Posts: 258
Originally Posted by TYSON' date='May 5 2003, 06:37 AM
I think 1600 - 1680 injectors are the biggest commercially available. Methanol guys use 8 - 12 or more of these, if there were bigger ones available I'm sure they would use them. Keep in mind for most cars that 550 cc injectors are HUGE