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  1. Thewespaul

    Failed 26 year old original db2, what’s inside? What goes wrong?

    Next the main advance piston is removed. This is a hardened steel slug with a chromium coating sliding in an aluminum housing, it depends on the tolerance between the bore and piston to create a differential of pressures between the driver side with housing pressure and the passenger side with...
  2. Thewespaul

    Failed 26 year old original db2, what’s inside? What goes wrong?

    Next I remove the advance system, the light load advance arm showed pretty good wear with the roller worn down to the point of damaging the face cam. The roller will need to be replaced along with the face cam in this situation. Next comes off the advance piston plugs, the driver side...
  3. Thewespaul

    Failed 26 year old original db2, what’s inside? What goes wrong?

    Tearing down some cores today and found I had a factory sealed db2831-5028 in my pile. This is a non turbo calibration for 92.5-94.5 7.3 idis with a torque screw housing. When these pumps fail, it typically starts out as driveability issues, non functioning advance, poor idle, smoking exhaust...
  4. Thewespaul

    How it Works - Fuel Selector Valve (FSV) and IDI Fuel Math AKA "What fuel pump should I run?"

    For a fuel transfer setup between both tanks, @krogo has the best setup I have seen.
  5. Thewespaul

    How it Works - Fuel Selector Valve (FSV) and IDI Fuel Math AKA "What fuel pump should I run?"

    Yep, which is why I started pushing the single tank kits with the sump, the largest pump I could support with factory fuel system plumbing was a 150 and I had to use a 105p pushing into a gsl392 with a bypass reg to keep it from dropping pressure in the higher rpms. The factory line size as well...
  6. Thewespaul

    How it Works - Fuel Selector Valve (FSV) and IDI Fuel Math AKA "What fuel pump should I run?"

    Awesome work! A general rule of pump I've been giving guys for flow requirements is to consider the stock 30 gph mech pump to be matched for a 50-60cc pump, if you have a 130 pump pusing 150cc at peak, youre going to need at least a 90 gph pump to keep up, I prefer to oversize the fuel system...
  7. Thewespaul

    Do I have a limited slip rear diff?

    Look at the diff tag for an L after the gear ratio, or look at the center section when you have the cover off.
  8. Thewespaul

    Brass caps!!!

    There's many other parts that will run out of availability sooner than the plastic return line caps would, like much of the fuel injection parts which are out of production now, my return caps are made here in the usa by delphi and they dont plan on slowing down production anytime soon since its...
  9. Thewespaul

    blakpete91 88 F-250 IDI Build thread

    Possibly, I’ve already got 50 products with various options and add ons I stock inventory for so depending on how 2021 goes I may be adding to the product line or keeping it about the same, we’ll see how the new year goes!
  10. Thewespaul

    Project: The New CDD Shop Truck

    For a daily driver I don’t think lower compression is a good option, don’t really want an ether baby and I think you loose a good bit of power potential with lower comp. I plan to limit torque with my charger sizing to keep power out of lower rpm range. To use psd rods you just need to machine...
  11. Thewespaul

    Project WA5MOE 91 F250 4x4 IDIT Build

    I degree the cam with cam wheel comp4787, used idi lifters converted to solid lifters to take the hydraulic portion of the lifter out of the equation, use comp cams adjustable pushrods 7706-1 to take any lash out of the valve train, comp cams 4758-2 checker springs in place of the valve springs...
  12. Thewespaul

    blakpete91 88 F-250 IDI Build thread

    Well we officially have a 4x4 now, Ford shift boot came in so made a hole in the floor and used the factory delete panel screw holes to mount the cover, new cover is very well insulated and fits the body well even with the vinyl floor. Once the shifter was in we had issues getting every gear...
  13. Thewespaul

    Project Jerry

    94 idit, cclb dually truck with a clean title, was used by a concrete company in its later years on the road, it’s pretty rough
  14. Thewespaul

    Project: The New CDD Shop Truck

    Sorry for not having more data and tear down pics, I lost a phone that tumbled off the mill stand and most the pictures from when we did the tear down. The rods were definitely origin of the failure, the one with the broken piston was from the rod getting jammed up sideways in the bore and...
  15. Thewespaul

    Project WA5MOE 91 F250 4x4 IDIT Build

    HHP sabotages again, wrong piston rings showed up saturday and replacements are delayed with the holiday this week, so bottom end is waiting on rings so it can be ball honed and assembled for checking piston to valve clearance with the torque cam. Crank is final installed with the caps torqued...
  16. Thewespaul

    blakpete91 88 F-250 IDI Build thread

    Fuel pump relay harness wired down to fuel pump on the frame.
  17. Thewespaul

    blakpete91 88 F-250 IDI Build thread

    Engine is wired, new 4/0 marine starter cables and grounds, fuel pump relay kit, 220 amp alternator wiring kit and manual glow plug kit installed, wire tucked the engine bay harness under the battery tray and mounted the connector for the engine harness right off the tray. intercooler...
  18. Thewespaul

    Help! Smokey Pete is too smokey. LOTS of white smoke

    Pump timing sounds plenty advanced, looks like its burning oil or coolant. I would pressure test the cooling system make sure you dont have a headgasket issue. If you vacuum fill the cooling system you will not have any air pockets. If it fails the cooling system test I would pull the crossover...
  19. Thewespaul

    Any new fuel sending unit suppliers?

    trex, gas tank supply depot, ebay and rockauto are just selling MTS sending units with a markup, most dont have any inventory they are just drop shipping from MTS which is the sole manufacturer. http://www.mtscompany.com/sendingunits.htm
  20. Thewespaul

    Any new fuel sending unit suppliers?

    Mts makes American made new sending units for about $55 plus shipping.
  21. Thewespaul

    Broken ring floating in IP?

    You will notice there’s only two stock calibrations on my site, turbo and non turbo. For the non turbo pumps I use the 92+ non turbo calibration spec which is a modest upgrade for any of the older engines that used previous outdated calibration specs. The non turbo calibration will be the right...
  22. Thewespaul

    Project: The New CDD Shop Truck

    Pulled the engine out a couple months ago, bottom end was pretty much scattered, all the rods were bent but no bearing or valve damage. If I haven’t mentioned it already in this thread I plan on going with a different turbo configuration and it happened that my current turbo setup is for...
  23. Thewespaul

    Why can't I adjust my timing while my engine is running?

    The DB2 should never be run without the mounting flange nuts tight. The db2 rotating assembly consists of two main parts, the rotor attached to the driveshaft and the head that it rides inside which is attached to the housing. These two parts have a clearance of +/- .00003" for lubricity between...
  24. Thewespaul

    Excessive Blowby/Crankcase pressure.

    Valve guides can be a tremendous source for blow by especially with the 7.3 guides. I would pop a valve cover off and see where you notice gasses coming from. Valve guides wear tends to put heavy carbon deposits on the valve springs if run that way awhile.
  25. Thewespaul

    Luk or South Bend?

    You should be fine as long as you’re not launching at the track with sticky tires and a prepped surface, like I said not really “normal” use. The national and timkin bearings are good, recent Luk kits I’ve gotten are unbranded Chinese to bearings.

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