Unhooked ksb on N/IC

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Unhooked ksb on N/IC

Postby Remps » Fri Dec 14, 2018 8:48 pm

The last couple weeks I was using my truck I was running it with the ksb wire unhooked as it seems to run cleaner and has more power. Is this going to hurt the pump any? Should I hook it back up and add more timing instead? Timing is bumped 1/8 or 3/16 already.
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
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Re: Unhooked ksb on N/IC

Postby spencerdiesel » Sat Dec 22, 2018 7:42 pm

Ive Been super curious of the answers to this too. Won’t hurt anything electrically I’d say because non IC (as you stated) takes no elec power for timing to stay advanced.

But I’d love opinions on pump health internally with full time advance.

You say it has more power with the KSB unplugged even being 1/8” advanced from stock already? What sticks and pump setting does this truck have?
1992 W250, 5 speed, 4.10, Ext. cab Ext. bed, 12.5k winch, 75 gal. fuel tank

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Fuel: THD 6x10 VCO sticks, THD 12 psi piston pump, THD fuel pin, 366 spring, fuel screw 2 turns in, timing to the head/ >1/4”
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Re: Unhooked ksb on N/IC

Postby 79Powerwagon » Sat Dec 22, 2018 7:49 pm

I dont see how it could harm the pump at all. It doesnt make any difference as far as wear/stress, just rotates the roller housing.
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Re: Unhooked ksb on N/IC

Postby Remps » Mon Dec 24, 2018 6:22 am

Fuel screw is about 1/4 turn from runaway, 3200 spring, grinded fuel pin, stock 4x12's, will hit close to 50 psi with a leaky lift pump, ksb hooked up or not. I hooked it back up again the last couple times I used it to go to work, but couldn't really tell any difference now due to a complete lack of traction with the snow now. I could get on the throttle more aggressively without making a cloud of smoke with the ksb unhooked, and gained power from bottom to top. I'm assuming the difference is the timing, and not the change in case pressure?
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
Bring back the Bank of Canada, PRE- 1974.
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Re: Unhooked ksb on N/IC

Postby cougar » Mon Dec 24, 2018 9:40 am

Won't hurt a thing. However, keep in mind the non-IC engines use a wax motor type KSB vs the solenoid type on the IC engines. Even with power removed, engine heat will eventually close the KSB and reduce timing. So, I would be hesitant to add more timing. Best option would be remove the KSB and add timing.
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Re: Unhooked ksb on N/IC

Postby Remps » Sun Dec 30, 2018 8:42 am

Hmm..didn't think about heat soak affecting the ksb.
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
Bring back the Bank of Canada, PRE- 1974.
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Re: Unhooked ksb on N/IC

Postby Remps » Mon Jan 14, 2019 6:21 pm

Can one put a ksb off an intercooled pump onto a non-intercooled pump?
'90 D250 R/C,727,IC,6x.009's,1/8" bump,fuel psi,straight pipe w/5" stack.
'90 W250 R/C,47rh,K@N,HX35,1/8" bump,2nd gen IC,boost,egt,trans temp.3.07's.
'96 2500 S/C L/B,2wd,NV5600,3.54 L/S,cai,egt,pacbrake,mbrp exhaust,10 plate.
Bring back the Bank of Canada, PRE- 1974.
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Re: Unhooked ksb on N/IC

Postby DMan1198 » Mon Jan 21, 2019 3:21 pm

I’m going to say yes.
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Re: Unhooked ksb on N/IC

Postby 2uphill » Tue Jan 22, 2019 10:06 pm

I recently installed rebuilt I/C/IP on my crew cab, I never hooked up ksb and it runs rougher than a cob for first 5-10 minutes in this cold weather then smooths out after that... it’s an industrial injection with m/h spacer +hair timing,
90 d350, SRW, 2wd, 727, stock, except banks i/c, 85K
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