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  1. Crazydavez28

    488 8.0l GM Crate Motor -- Any experience?

  2. Crazydavez28

    488 8.0l GM Crate Motor -- Any experience?

    Very good point! I had to go check this and the only item on the 7.4 that bolts to the block and head is the Cast Iron AC bracket with the power steering pump tab to boot.
  3. Crazydavez28

    488 8.0l GM Crate Motor -- Any experience?

    I picked one of these up locally from an industrial LP application. This is a Gen 6 BBC tall deck with all the $$ upgrades: -fully adjustable valvetrain on Gen 6 heads -8.1L Camshaft and firing order -58x reluctor on the snout -4x cam pickup on the front cover -oil pump drive stub shaft (no...
  4. Crazydavez28

    1998 7.4 Vortec EGR tube replacement/repair

    it won't but you can switch it out for a copper washer
  5. Crazydavez28

    7.4L EGR Information

    Ok had time to mess with it. If you are messing with your EGR setup here are some facts. Fittings in the manifolds are both the same 6400-14-12 7/8"JIC to 3/4"ORB This translates to a 1 1/16"-12 thread size in the intake and exhaust manifolds. EGR Tube is 7/8"ID and 20" Long Discontinued by...
  6. Crazydavez28

    1998 7.4 Vortec EGR tube replacement/repair

    Ok had time to mess with it. Fittings in the manifolds are both the same 6400-14-12 7/8"JIC to 3/4"ORB Tube is 7/8"ID and 20" Long Alternatives might be a 1"x18" SS Supply hose and 3/4" ORB to 1 1/4" MNPT Adapters in each manifold.
  7. Crazydavez28

    1998 7.4 Vortec EGR tube replacement/repair

    Like someone said take the fittings out of each end Intake and Exhaust manifold. figure out the pipe thread sizes and then order stainless hydraulic fittings to adapt to a JIC size you can obtain. Then update this thread with the results. If I get a chance I'll measure the female pipe threads...
  8. Crazydavez28

    96 K3500 7.4l Vortec

    Check your rotor again. I have had the center tab break off and cause a misfire. Cheap crap off Amazon didn't last.
  9. Crazydavez28

    Stock 7.4L turbo capabilities

    I am approaching 200k on my 2000 K3500 with stock 454 and plan on dropping in a new motor once the clock rolls over. Has anybody strapped some turbos or boost to one of these in stock trim and had reliable results? It's a CCLB so I have acres of room under the cab to rear mount some turbos...
  10. Crazydavez28

    0411 swap done, did crank relearn...now it doesn't run

    I had the same problem with a brand new distributor off Amazon. The tab on the rotor broke and amazingly it still ran.
  11. Crazydavez28

    0411 swap done, did crank relearn...now it doesn't run

    Since you did 0411 swap Check the injector bank assignments in your tune. Also LS firing order is different than SBC.
  12. Crazydavez28

    1998 7.4 Vortec EGR tube replacement/repair

    Good luck finding a tube. Fittings are -14 JIC. A feller might try cannibalizing a 5.7 hose or a stainless steel MagnaFlex Pipe and weld the ends to some female swivel fittings.
  13. Crazydavez28

    No Noises, Not moving in any gear

    Well the limited fix has held up to 650 miles of Rocky Mountain Race Week. No quarter mile passes but I did find out going into limp mode with a transgo stage 2 shift kit is rather strange. I could get 1st gear with no apply pressure, 2nd gear and 3rd gear worked as normal. Fixed the wire and...
  14. Crazydavez28

    No Noises, Not moving in any gear

    Update... Got the tranny back in and it seems to be working now. Had a mishap with a thrust bearing and forward sprag washer trying to occupy the same space. Had to order some additional parts. One thing I did notice was that when the pump went it deformed the notches on the converter pushing...
  15. Crazydavez28

    No Noises, Not moving in any gear

    The pump body and cover are usable in my opinion not perfect but no deep gouges. The transmission center .net only sells billet or OEM rotors as they claim aftermarket rotors fail early. I measured the old ones and ordered new AC Delco parts of rockauto. Toatl cost will be around $100
  16. Crazydavez28

    No Noises, Not moving in any gear

    Looks like a total pump explosion. I do not see any pieces anywhere else in the tranny. I’m planning on reusing the housing because if I have to build a tranny it’ll be the 4l80e core I have sitting around. Any recommendations on pump kits?
  17. Crazydavez28

    No Noises, Not moving in any gear

    None at all.
  18. Crazydavez28

    Air Conditioner: what would you do?

    I've replaced a couple condensers (rocks hit them) and the new ones from rockauto already had the orifice tube installed. IIRC The rear air condenser has nothing in the condenser and has seperate ones for the front and rear lines. In my case I had to pull the orifice tube out and put it in the...
  19. Crazydavez28

    No Noises, Not moving in any gear

    I checked that and changed the filter...not so lucky.
  20. Crazydavez28

    No Noises, Not moving in any gear

    Can they break the ears off? I am seeing very little debri that is non magnetic.
  21. Crazydavez28

    No Noises, Not moving in any gear

    Ok, got a new filter put in and refilled. It does not pull fluid on startup and I get a slight rattling noise coming from the bell housing. Triple checked all the linkages and I'm not that lucky.
  22. Crazydavez28

    No Noises, Not moving in any gear

    Just pulled the pan and the filter was in its rightful place. I have a self installed drain plug and I only got 5 1/2 quarts out. I'm not sure how much is in the converter but it seems like not enough fluid. Anyway, I did see some evidence of pump failure so I guess it can happen without any...
  23. Crazydavez28

    No Noises, Not moving in any gear

    I've got a 97 Tahoe Engine and Tranny sawpped into a 79 El Camino stock PCM built tranny with a shift kit 1800 stall converter. I drove into town and parked the truck like normal. Came back outside and started up fine but will not move at all in any gear. Fluid is in great shape and when...
  24. Crazydavez28

    Fuel Pressure for 7.4L vs 5.7L

    Just a follow-up. Finally got around to changing the FPR on the 7.4 and now I get 45psi Key on, 40 psi idle, and 50 when quickly burping the throttle. Not the numbers I was hoping for so I may do a fuel pump as preventative maintenance. Replaced the reference line as the old one was cracking...
  25. Crazydavez28

    E85 500 HP 383 with a L31 truck intake

    I'm not saying they would fit easily but a man on a mission could make it happen. I have some stock L76 injectors laying around and I know the LS3 injectors I replaced them with are 1/4" shorter. A guy would need a custom fabbed tubular fuel rail but if you ream the material out the spider...

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