ls1_mast

i have searched about those two injectors here and so far i came across 3 threads about those injectors.
one that it says 630 can go dead on you . one said the SLR injectors are better fit due to the spray orientation and the third one said that the SLR is rated around 520cc and the 630 is great . so i need to get an opinion from long term experience of using both of those . 550 and 630
my current setup is 180 crank pulley , 84 supercharger pulley, secondary cats delete , 010 supercharger pump , split cooling (not sure if there is any benefits from it ) and since i have the S55 so i have 2 heat exchangers so i didnt add any aftermarket .
the question is , reliability wise, 550 or 630 ? and any issues with cold start, idle or closed loop cruising ?

SICAMG

Run the 630's and get it over with. You will not have any drivability problems and will have plenty of injector for the future. What do you see for boost?

ls1_mast

i'm at 14.7 PSI of boost ( with only 180MM crank Pulley )i'm using the stock injectors so far and until yesterday i had only the 180mm crank pulley. my AFR was 10.8 at 6600RPM at 5500RPM the AFR is 11.2
i just installed the 84MM supercharger Pulley today morning and i didnt push the car until i get the injectors.

ls1_mast

i ended up ordering the 630CC bosch and i will be installing them tonight . quick Q thought , can i drive the car ( without tune ) to the tuning shop to tune it ? (1 hour drive )

ls1_mast

well , i have installed the injectors and started the car , after 5 minutes every thing got back to normal and O2 sensors reading fine .

SICAMG

It will drive fine...the o2's take care of everything. Just don't kill it before the tune.

ls1_mast

i just came from the garage and the tuner told me that he only had to change something its called dead time to 1.08 MS that is all , is that true ? sound strange to me . when i changed my LS3 injectors i had to get about 4 complete tables from injector dynamics .
the car drives fine but i wanna be sure that i can go and push it without me having to worry about it

oneslow55

it's called scaling .


Who is the tuner/?

ls1_mast

just a local garage in the country i live in at the moment
but the rescaling is referred to only changing this dead time number ?

ta72

iTrader: (1)

Not sure how you will be running your stacked pulley setup since your lacking major cooling. Your cooling setup will not do much. I only have 180 lower and have the 83 but not installed yet until i have the cooling setup better. I have underhood tank with PLM XLarge heatexchanger with bosch pump and my cooling is not enough. With your setup you need like mine and meth. Or killer chiller with meth setup.

ls1_mast

i have meth installed already but i'm using water only ( no meth ) and i have the 010 bosch pump. but i have the S55 and it comes with two heat exchangers and my intake temps seems moth that high. i only hit 70C when i'm at 240 or 250 KM/H

VictoryRoadPerformance

550cc can max out stock blower on pump, 630cc give you a little breathing room.