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  1. J

    Intake is aluminum?

    I didn't have mine bolted down and had no problems with it. The intake is a large enough mass and aluminum has high enough thermal conductivity that I wouldn't expect to see much trouble with warping. I would try to do the welding in small symmetric segments though rather than just hog it on...
  2. J

    Intake is aluminum?

    TIG welded mine when I fabbed up the new intake setup and didn't have any issues with either welding or cracking so far. (~3 yrs now) Didn't preheat it or do any crazy cleaning either, just got all the grease off. Probably helps that I used some fairly thick plate (3/16 - 1/4" iirc) and a decent...
  3. J

    washing advise

    FYI, official info is to not wash the injection pump unless it's dead cold (ie, been shut off for some hours). The reason is that the pump internals will get hot and if the outside of the pump gets hit with cold water from washing it could in theory shrink enough to bind/damage the internals...
  4. J

    Cheap-O clutch master and slave cylinder?

    That spring seems to help return the petal - I suspect it helps make a smooth clutch as well and to keep load off the throw out brg. It's not directly bearing on the petal, but rather through a can setup iirc. It wolnt make the petal that hard to push unless something is afu.
  5. J

    'Bulletproofing' an IDI?

    When I rebuilt mine last time around I got some stronger springs from Russ (typ4) and put shims under them per his recommendation. Not sure I'd want to go for 60 psi though - that's a fair amount of pressure. Would be worried about blowing out exhaust joints and gaskets myself, also not sure...
  6. J

    'Bulletproofing' an IDI?

    I've used an exhaust brake without any trouble. The one I have is the US Gear that has a pressure regulating feature, they offer a 35 & 50 psi setup, mine is 35 psi. Would be caution if you have one of the other types that doesn't really regulate, but I've had no issues at all using mine on a...
  7. J

    'Bulletproofing' an IDI?

    I doubt very much that you'll get that much of a frictional loss decrease with the low rpm that these engine run at and the size/mass of everything else. Much more effect on high rpm low friction engines. Would possibly reduce value guide wear, but on the other hand these engine don't have a...
  8. J

    Anyone know who built/documented this project?

    Yah, me. Nothing special about them though. Had some sort of special spring matching done though that he thought would do something, I forget what exactly. Got his springs in a box somewhere still I think. Only reason I got them was I needed a pair and he had them for sale.
  9. J

    'Bulletproofing' an IDI?

    Head studs, ceramic coat pistons, deck pistons ~0.015", typ4 cam. WG turbo set for 10-12 psi boost and matching pump fuel rate. IMHO special injectors don't do much for you so just a good set of stock ones. Intercooler. Decking/ceramic costing pistons isn't really necessary for ~10 psi boost but...
  10. J

    Anyone know who built/documented this project?

    I believe that's Justin who is not on here anymore but is under racin&drummin (or something similar) on FTE. He has some interesting ideas, but I'd also take his work with a grain of salt - some things he's done/recommended are rather controversial and have struck me as being less than optimal.
  11. J

    Electic Fan Clutch

    It's a nice mod, no complaints. Still have it on a manual switch, am planning to build an automatic controller eventually but haven't needed it - never had the truck get hot enough to need it on except on hills when I already manually kick it on. The 2 speed setup on this type of clutch probably...
  12. J

    HydroBoost Brake System?

    To the best of my knowledge, a 98 unit will *not* directly fit. What you need is a 87(IIRC, not sure on 1st year of F-superduty) - 94 F-Superduty (ie F-450) unit. Certain 97+ trucks ('superduty line') also used a hydroboost, but the firewall bolt holes are different as may be other...
  13. J

    anyone interested in going in on a truck in the SFBA?

    I just love how the ad says it's a 1983 Bronco... diesel. :rotflmao cookoo (right side under map)
  14. J

    Best Turbocharging Options for IDI's

    What is your source for this info? I do not have the references to say with certainly, but my take would be that the critical factor in engine stress is the cylinder pressure, which is a function of fuel, not so much boost - in fact more boost means more air to cool the combustion, so the...
  15. J

    Mechanical fan vs. electric conversion....real numbers to compare

    Before you mess around too much with locking fans try adding oil to the clutch - it's cheap and easy and should help it drag more.
  16. J

    HydroBoost Brake System?

    Fairly cheap and easy mod - worth it for sure. New/reman parts off rock auto aren't bad price wise, so that's the route I'd go. Fairly common in the junkyards, but still hit or miss, and you have no idea if they're any good. Only real difficult part is modding the brake petal to move the pin up...
  17. J

    Would you trust this hitch

    I don't actually thing the bolts are that big of a problem - rear set look like the bumper bolts which are decent sized, and the fronts aren't really under that much load. What I would be more concerned with is that neither the cross piece or the 2 side tube sections are big enough to have...
  18. J

    Mechanical fan vs. electric conversion....real numbers to compare

    Disagree, the main reason you see them in cars is that it allows the fan and engine to be independently located - ie transverse mounted engines. Also allows better control and thus a small increase in fuel economy. That being said, the fuel economy change is much more noticeable in a small high...
  19. J

    Mechanical fan vs. electric conversion....real numbers to compare

    I've noticed a difference between a functioning fan clutch and shot at speed as well, but not too much - something like 185-190 vs 195-200 IIRC. Apparently it helps enough to be noticeable. Not an electric fan issue since my experience was on exactly the same rig w/o any electric fan.
  20. J

    Gaskets

    Used Fel-Pro without any problems myself. I'd just get whatever as long as it's not off brand chinese.
  21. J

    Mileage numbers for c6 to e4od swap?

    Go for it. May as well if you already have everything. One thing to keep in mind is that there's going to be losses associated with all the gearing - that is, a direct drive high geared rear will be more efficient than a double od low gear since you're having to run through 2 od gearsets and...
  22. J

    Mechanical fan vs. electric conversion....real numbers to compare

    I have an aux electric fan on mine mainly because it came with the intercooler kit. Seems like it should work decently at least to help with AC. Doubt it will have much effect on the main fan, but more air is always nice. Just remember that a large portion of your cooling comes from air flow...
  23. J

    Cheap-O clutch master and slave cylinder?

    Carquest at one point had aluminum cylinders with a real bleeder on the slave. Not hard to remove the stock lines, but it is a PIA to bleed the thing. Rock auto appears to have a metal master, but couldn't find a slave in the brief search. (under 84 F250) That being said, I would bet...
  24. J

    Cavitation question (yes, I read the sticky)

    In a 6.9 I wouldn't worry too much about SCAs. Wise to use, since it's cheap and easy, but not at all the end of the world if not. I would be concerned if the coolant hasn't been changed, since old coolant can become corrosion and cause other problems. The reason it's a problem in the 7.3 is...
  25. J

    Best Turbocharging Options for IDI's

    Question - is this based on theory or experience? What I have seen is that the EGTs go down with a WG turbo, having run both on the same truck. Yes, you have more chocking of the exhaust flow, but you also get more boost which means more air flow overall, diluting the hot gasses and reducing...

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