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  1. Bextreme04

    Varajet Idle stop solenoid part number

    That 214-2138 is the one for a quadrajet.
  2. Bextreme04

    Varajet Idle stop solenoid part number

    Yep. As long as ignition is applied it is holding it up. Thats also how the idle solenoid on my 1980 quadrajet is. The signal that engages the AC compressor also engages the solenoid to raise the idle RPM while the compressor is active.
  3. Bextreme04

    Varajet Idle stop solenoid part number

    I think you have that backwards. Holds it open when running. When ignition power is applied it pushes the throttle open to keep it running at the appropriate position. When the ignition is shut off it retracts and allows the throttle blades to snap all the way shut to prevent run-on(dieseling).
  4. Bextreme04

    Blown head gasket questions

    I didn't... which is why I was putting that on there. He was replying to rustypiles question about when the last time he did a tuneup was. Got to be careful with sarcastic comments like that, especially with a new member that obviously isn't all that familiar with these things and could take a...
  5. Bextreme04

    Blown head gasket questions

    Or a cracked head, or a bad intake manifold gasket can also cause this if it blows between the coolant passage and the runner for #1 or #7 instead of into the valley.
  6. Bextreme04

    Pulling Sucks--2001 Suburban 3/4 ton--6.0

    I just finished assembling the 6.2 for our 2011 Suburban. It currently has the 5.3 and we pull a 6400lb Keystone Crossfire. I get about 6-8mpg currently and the 5.3 is generally just not happy(but I'm also getting garbage mileage unloaded so it's likely just a tired engine issue). I got the L9H...
  7. Bextreme04

    Big 10 Catalytic Converter, lol.

    In 1980 the standard 3/4 tons also ran into needing them due to the GVWR change. That was the reason for the special high gross weight rating RPO that became available at that time. Mine is one of the 8600GVWR K20's that were made around that time... no EGR, no cats.
  8. Bextreme04

    350 vortec 5.7 lower intake leaking vacuum?? Help please

    If you use regular permatex you can't start it up for 24 hours. I use the 90 minute "right stuff" in a tube and it works WAY better. No leaks or seapage even several years later and you can start the engine up 90 minutes after application. The GM "threadlocker" that is called out earlier in this...
  9. Bextreme04

    Small block to big block swap. What do i need to know?

    No, they CAN flow UP TO 750cfm. The good thing about a quadrajet is that the primaries are tiny and give good drivability and efficiency at the low rpm, low throttle, conditions that you will be in 99% of the time. The design of the secondary lets it flow as much as it needs on the top end. On a...
  10. Bextreme04

    350 vortec 5.7 lower intake leaking vacuum?? Help please

    The bolts are not torque to yield... not sure where you got that from. They do not need to be replaced and are not one time use. It looks like you put a ton of RTV on there under the gasket? Don't ever do that... it will more often than not cause a massive leak. The rubber O-rings in the gasket...
  11. Bextreme04

    Small block to big block swap. What do i need to know?

    The only difference on a big block truck for you suspension wise would be a bit heavier front spring. If you have a Big 10 or the F44 front spring option, you would have that heavier spring in there already. The big block weighs about 200lbs more than the small block... so you'll feel the...
  12. Bextreme04

    Small block to big block swap. What do i need to know?

    That's a 454 from a 79 Pickup. Unless you swapped the heads and/or the cam out... its going to be a low compression dog and won't be spinning up past about 4500rpm anyways. 600CFM will be plenty. The only thing you should need is to modify the exhaust to connect to the headers on the big block...
  13. Bextreme04

    Rochester Carb tune ; Which is best method?

    I have a timing light with built in tach, so I have always used lean drop... even with a holley.
  14. Bextreme04

    Rochester Carb tune ; Which is best method?

    You should end up in generally the same area with both methods. Lean drop is easier and more precise if you have access to a tach. If you don't have access to a tach, a vacuum gauge is generally easier to find and cheaper.
  15. Bextreme04

    Rochester Carb tune ; Which is best method?

    I use this tool. I have newer design hex head idle mixture screws on my quadrajet that I put in when I rebuilt it using a kit for my model number from Cliff. https://www.amazon.com/dp/B072K31TJJ/ This is the tool I use, it also has the double D socket. It makes it much easier to adjust the...
  16. Bextreme04

    Rochester Carb tune ; Which is best method?

    I use lean drop. Make sure the engine is FULLY warmed up first and the choke is fully off. Adjust each screw out in 1/2 turn increments side to side until rpm peaks and starts going down again. Adjust the idle screw as you go to keep the rpm around 750 or so. Once you have backed the idle...
  17. Bextreme04

    tow rating - '90 2500 Suburban

    That was one of the evaluation tests when the M-ATV was going through evaluation testing to be the replacement for the HMMWV in Iraq and Afghanistan. When it got selected and we were doing the driver training for the military, every driving course got a 60% slope hill(~31 degree) put on it. The...
  18. Bextreme04

    Greetings from Seattle

    Welcome from Oregon. There are a few fairly active squarebody groups in our area. There are several C10 clubs and also a few squarebody specific ones like "PNW K5s & squarebodies". There are quite a few seattle area locals on here as well. @SirRobyn0 is local to the area and connection with...
  19. Bextreme04

    87 350 TBI running lean

    Vacuum leak. Check all your vacuum lines for cracks/old rubber and spray carb cleaner along the base of the TBI unit and around the intake manifold while running. Any change in RPM while spraying around a specific area shows that you have a vacuum leak in that area.
  20. Bextreme04

    03 Trailblazer Build.

    It's gonna be fun! keep this thread updated, especially with videos of this thing getting down with the boost!
  21. Bextreme04

    Driver's side Cylinders 50-60 PSI, Drinkers side 130-140 5.7L 350 1986 K10 Suburban Crate Engine

    Too tight on tolerance is the biggest issue. Just keep in mind that after each step of assembly, if it doesn't spin free, you messed up. Same thing for ring gaps, if you have too little gap the ring ends will hit each other under load and seize to the cylinder walls. They will then break the...
  22. Bextreme04

    03 Trailblazer Build.

    way more... not even on a hp/cu-in basis. They just make more HP/TQ stock than the 5.3 does. Add boost and it's even more so. I-6 is a very efficient arrangement for low RPM and torque production, the V-8 arrangement does better for higher RPM and HP production. After seeing this, I might...
  23. Bextreme04

    85 K20 4X4 6.0 6L80E swap. What are my fuel delivery options. Rear tank?

    I'm using a rear mounted 91 Blazer 31 Gallon tank and sending unit with an EP381. I used re-bent stock GMT-400 lines and clamps from the engine/trans donor vehicle to run the lines along the inside of the frame rail and then TBI conversion fittings from ICT Billet to convert from the stock ends...
  24. Bextreme04

    New guy with a ton of general questions...

  25. Bextreme04

    New guy with a ton of general questions...

    The two wires to the front will be a 10 gauge orange wire for the 30 amp switched ignition power and a 10AWG blue wire for the trailer brake power. 5 wires to the rear are the T-connector that camaro is talking about and will tie into your rear light harness to provide the stop light, running...

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