Question about California trucks
#21
03-17-2012, 08:28 PM
Diesel Bomber
#22
03-17-2012, 09:23 PM
Diesel Bomber
i know another difference betweem the cali spec and 49 state trucks is the spring in the FPR. the fuel pressure was bumped up on the cali models. there is a seperate part number for the cali spec fpr kit. i came across this looking for info on doing a fpr shim, and someone listed the different part numbers. im not sure what the difference is pressure is, but i will probably be buying the cali spec spring to help smooth out my idle..
oh.. and another thing i just remembered - the timing is different for engines that use single shot vs split.. one uses 1 degree advance timing while the other uses 11 degrees.. the chip in the pcm also has different programming. the water outlet on the water pump on the school bus motors is also on the opposite side of ours, but i would imagine if the motors were swapped they would have changed over to our style pump to make connecting to the radiator easy/normal .
oh.. and another thing i just remembered - the timing is different for engines that use single shot vs split.. one uses 1 degree advance timing while the other uses 11 degrees.. the chip in the pcm also has different programming. the water outlet on the water pump on the school bus motors is also on the opposite side of ours, but i would imagine if the motors were swapped they would have changed over to our style pump to make connecting to the radiator easy/normal .
The timing on ANY POWERSTROKE is the same, and dynamic. It is not set at one point...
#23
03-17-2012, 11:53 PM
Split-Shot vs. Single-Shot:
For emissions purposes, 7.3Ls built for sale in California after April of 1996 came standard with split-shot injectors (AB codes as opposed to AA), which flowed approximately 130 cc of fuel (on a 1,000-count test). By converting to AC-code single-shot injectors, considerable gains in power can be had, as they flow 160 cc of fuel. And because only one injection event occurs (as opposed to a split-shot event), they also require less high-pressure oil to fire.
It should be noted that all of the following modifications can also be performed on all '94 to '97 Power Stroke engines. With a few quick phone calls, a set of single-shot injectors was on the way, as well as a new 17-degree high-pressure oil pump and some fuel system upgrades. While under the hood at John Wood Automotive in Holtville, California, we also took the time to perform a little preventative maintenance on the old Power Stroke.
Tuning For Single-Shot Injectors
One of the most important things to keep in mind when going from split-shot injectors to single-shot units is tuning. To be specific, it's in the timing. Split-shot engines typically use 1 degree of timing advance at idle, while single-shot engines require 11 degrees. After our install was complete, we pulled the F5 chip attached to the powertrain control module (PCM) and had John Wood Automotive reburn it with DP Tuner's programming, which allowed the new, single-shot injectors to work problem-free both at idle, and on the throttle.
---AutoMerged DoublePost---
and before anyone says im wrong about the FPR springs, here:
Fuel Pressure Regulator Repair Kit (contains spring, valve spool & new brass plug)
(Ford) F5TZ-9K061-A (federal emissions; 94-98)
(Ford) F6TZ-9K061-AA (CA emissions; engine serial no. 201681-98)
Fuel Pressure Regulator Spring
(International) 1823643-C1 (federal emissions; 94-98
(International) 1825854-C1 (CA emissions; engine serial no. 201681-98
Last edited by kctyphoon; 03-18-2012 at 12:08 AM. Reason: Automerged Doublepost
#24
03-18-2012, 12:36 AM
that damn truck still causes problems even after I sent it's worthless azz packing.
#29
03-18-2012, 01:10 PM
Diesel Bomber
LOL... Can someone please help me adjust the timing wheel on my powerstroke? I am now running single shot injectors in my split shot motor and I never adjusted the timing wheel...
The timing (I'll repeat it so its clear...) the TIMING on a powerstroke is dynamic. It is not set. Anyone that tells you there powerstroke is running 1* of timing, or 11* of timing or 18* of timing has no idea what they are talking about. This is NOT a mechanically injected motor.
Your free to believe whatever Diesel Power tells you, however it is wrong.
The timing (I'll repeat it so its clear...) the TIMING on a powerstroke is dynamic. It is not set. Anyone that tells you there powerstroke is running 1* of timing, or 11* of timing or 18* of timing has no idea what they are talking about. This is NOT a mechanically injected motor.
Your free to believe whatever Diesel Power tells you, however it is wrong.
