1stGen.org

THE place for 1st gens

Skip to content

J-jets?

How the engine works

Moderators: Greenleaf, KTA, BC847, Richie O

Post a reply

J-jets?

Postby Begle1 » Tue Jun 09, 2009 5:25 pm

Do we have saddle jets or J-jets? Do we have the oil rifle for J-jets?
1990 D-250 Regular Cab: Tweaked injection pump, built transmission, a cataclysmic charlie foxtrot of electronics, the most intense street-ran water injection system in the country, and some more unique stuff.
User avatar
Begle1
14mm rotor
 
Posts: 1968
Joined: Sat Jan 06, 2007 5:31 pm
Location: Kihei, Maui, Hawaii
Top

Postby KTA » Tue Jun 09, 2009 7:06 pm

Unless you put a common rail motor in you have saddle jets and there is no provision for j-jets.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
User avatar
KTA
diesel guru/mod
 
Posts: 1855
Joined: Thu Jan 04, 2007 2:23 pm
Location: Shelby County, Ky
Top

Postby IowaCummins » Wed Jun 17, 2009 8:05 am

can i ask what you guys are talking about? im either thinking oil jets or maybe injector spray something? am i close or way off
1993 Dodge W250 Reg cab. Auto, .010" headgasket, A1 Studs. Just the Lil Ole VE pump Fuelin 7x.014's turnin the Aurora 3000 turbo. 5" Turbo back to Duals. :cbadge:
IowaCummins
14mm rotor
 
Posts: 522
Joined: Tue Mar 17, 2009 2:16 pm
Location: council bluffs iowa
Top

Postby Begle1 » Wed Jun 17, 2009 1:02 pm

Oil jets for the pistons.

Everything before the common rail has saddle jets that get their oil from the main bores. When they went to the common rail they put a new drilling in the block for J-jets that shot oil more directly into the piston.

Common rail 5.9's have provisions for both; lower horsepower engines had the saddle jets and higher horsepower engines had the J-jets. With the 6.7, they all have J-jets and saddle jet provisions no longer exist.
1990 D-250 Regular Cab: Tweaked injection pump, built transmission, a cataclysmic charlie foxtrot of electronics, the most intense street-ran water injection system in the country, and some more unique stuff.
User avatar
Begle1
14mm rotor
 
Posts: 1968
Joined: Sat Jan 06, 2007 5:31 pm
Location: Kihei, Maui, Hawaii
Top

Postby KTA » Wed Jun 17, 2009 1:04 pm

J-jets are the cummins term for the bolt in piston cooling nozzles which do spray oil. In the 6b series they are intended to spray into a gallery in the bottom of the piston that allows more cooling to the piston crown. That is how come they can run continuous 1300+deg EGT and make 325rhwp without melting down.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
User avatar
KTA
diesel guru/mod
 
Posts: 1855
Joined: Thu Jan 04, 2007 2:23 pm
Location: Shelby County, Ky
Top

Postby IowaCummins » Wed Jun 17, 2009 1:38 pm

ahh ic ok cool. i figured it was something like that. thanks guys i get more smarter on here than at skool! lol
1993 Dodge W250 Reg cab. Auto, .010" headgasket, A1 Studs. Just the Lil Ole VE pump Fuelin 7x.014's turnin the Aurora 3000 turbo. 5" Turbo back to Duals. :cbadge:
IowaCummins
14mm rotor
 
Posts: 522
Joined: Tue Mar 17, 2009 2:16 pm
Location: council bluffs iowa
Top
Post a reply

Return to Engine

Who is online

Users browsing this forum: No registered users and 55 guests

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
cron