6x13 or similar injector tuning

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Re: 6x13 or similar injector tuning

Postby spencerdiesel » Tue Mar 28, 2017 3:26 am

How's your 518 liking you these days :D
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

Fuel: THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw bottomed @ 3 turns, timing bumped 3/16"
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Re: 6x13 or similar injector tuning

Postby 79Powerwagon » Tue Mar 28, 2017 8:38 am

I was worried it was going to be miserable to drive after I put the 35s on. But it really didn't affect it too badly.

The 6x13s, yeah I have to ease into it a bit more on a hard pull rather than just blow through the converter but the trans itself bangs gears without a hiccup. I have a build sheet on it from previous owner , built with "hd" parts.

I rolled into it hard on the highway last night at about 65 and it actually set me back a little. I was pretty surprised :shock:

Trying too take it easy til I have the head clamped down good. Oh and a functional egt gauge :lol:
1979 Dodge Warlock, I/C 12v, 518, TCS89% Converter, 6x13 injectors, HE351cw, Piston lp
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Re: 6x13 or similar injector tuning

Postby Remps » Tue Mar 28, 2017 12:57 pm

The pink/green afc spring in the IC pumps suck once one puts bigger injectors in. A green/black out a N/IC pump or a stiffer spring from the hungry diesel will allow the afc to actually limit low end fuel, instead of beginning movement at 2 psi and bottomed out by 8 psi, for example.
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
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'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
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Re: 6x13 or similar injector tuning

Postby cougar » Fri Apr 28, 2017 9:12 am

I made a .090" spacer for mine. I'm not running as big an injector, 7X.010 SAC but still hazes at idle. The spacer stopped most of the warm idle haze, still does a little when cold.
RIP 91.5 W250 5 speed. The great experiment.
92 W250 HD 47RH with Compushift. Upgraded H1C to 60/60/16, modified fuel pin, and DAP 7X.010 injectors.
01 2500 "the work truck".
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Re: 6x13 or similar injector tuning

Postby 79Powerwagon » Wed Nov 22, 2017 8:08 am

I was reading through some older threads and read something that Eric had said,

He was running a 72lpm injector and found that backing off the timing actually cleared up haze. Now maybe that could have been the 155* spray angle...

Feel I'm getting mixed info on this.


Im going to be plowing with this truck again and want to try to get the idle cleaned up as best I can. (Cold temps,short run time)

What is the best to clean up larger injector haze. Retard timing or skip a tooth(advance)?
1979 Dodge Warlock, I/C 12v, 518, TCS89% Converter, 6x13 injectors, HE351cw, Piston lp
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Re: 6x13 or similar injector tuning

Postby BC847 » Wed Nov 22, 2017 3:51 pm

As far as cleaning up the burn, you might consider raising the injector's pop-pressure.
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Re: 6x13 or similar injector tuning

Postby 79Powerwagon » Wed Nov 22, 2017 6:54 pm

They are set at ppump pop pressures, more than that?
1979 Dodge Warlock, I/C 12v, 518, TCS89% Converter, 6x13 injectors, HE351cw, Piston lp
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