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pump timing

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4 posts • Page 1 of 1

pump timing

by jbelcher7681 » Tue Aug 25, 2009 8:45 am

i did a 1/8 in bump timing advance, and i lost 10 psi of boost and didnt really see a difference in my fuel milage. is this normal?

jbelcher7681: smoke screw?; Posts: 1; Joined: Tue Aug 25, 2009 8:22 am

by MMeier » Tue Aug 25, 2009 5:10 pm

Ummm no, you did bump it the right direction, correct?

'93 W250CC, 5 speed, 3.54's, pump tweaks, NV4500 conversion, straight piped, 33's. Also, have '03 3500 QC 4WD dually, 551HP/ 1008 TQ @ MATS '07

MMeier: fuel screw!!!!; Posts: 227; Joined: Sun May 27, 2007 11:13 am; Location: Vegas

by Richie O » Tue Aug 25, 2009 5:14 pm

It is normal to lose a little boost but not 10 psi.

1989 W250 727, 3.07 L/S, S300, P/S Intercooler, Stans exaust, Pump adjustments, 127k miles,297 hp
1993 W250 extended cab, rag, 4.10 l/s, 6x16's, HTT 62/71/14 piston l/p, Isspro EV series tach, fuel pressure, boost, oil pres, water temp, volt, pryo, 132k/ 301 hp
1992 W250 with NV4500, 3.54's, 16cm 60mm GDS H1C, ground stock cone, Isspro tach, pryo, boost, fuel pressure, slow, rusty, dented,180k

Richie O: Administrator; Posts: 4171; Joined: Sat May 17, 2008 9:01 pm; Location: New England

by peobryant » Tue Aug 25, 2009 5:28 pm

Do you notice a loss in power? More smoke?

Parker
1991 Dodge Ram D350, Cummins Turbo Diesel, A518
1972 Mercedes-Benz 220D, OM615 Diesel, 4 Speed Manual

peobryant: 14mm rotor; Posts: 1946; Joined: Thu Dec 27, 2007 1:07 am; Location: Goshen, Ky

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