by RCCUMMINS89 » Wed Mar 06, 2013 4:53 pm
I'd recommend an injector that is 75% AT MAX over stock with the hx40.....and that is if there is a tremendous amount of timing jammed in there.
So a 5x13 that is flow honed about 15% over..... or a 5x15 size. You can use a 5x18, but the problem is you are gonna have a lot of issues of putting the fire out and keeping it out with that 40. Now, if you are for certain going to upgrade to a larger turbo..... then by all means go with a 5x18, if it is gonna be used for a pulling truck.
NOW THESE ARE MY OPINIONS ON THE MATTER. TURBORAM MIGHT HAVE SOME GOOD ADVICE, AS HE PULLS.
89 RC on shortened 92 diesel frame - NV4500 w/dual disc/4.10s on 37s. - Self built pump, "hot screw", lots of timing, True high volume low pressure lift pump, 62fmw/68/.7gated, 77lpm SAC Inj., Studs/O-rings,- 423/1220 Mustang - 11/16/2013
http://www.TheHungryDiesel.com full line dealer, if you don't see it please ask.