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  1. Bextreme04

    No fuel in carb at start up

    But it runs fine after it starts? What carb do you have?
  2. Bextreme04

    Want to build a good horsepower, good fuel economy engine for a 1978 c20 with stock 350. I don't know much and need help.

    The early quadrajets that used the thermostatic spring for the choke operation have the manifold vacuum in the spot he has it hooked up at. That is the correct location. When they went to the hot air choke in ~78, you end up with the big choke piece on the side that covers up that port and is...
  3. Bextreme04

    Useful parts on a '96 K3500 for a Squarebody?

    I used the fuel pump, fuel lines, wiring harness, vapor canister, radiator, radiator lower support, trans cooler, windshield washer tank, secondary battery tray, overflow tank, and a few other odds and ends when I did my swap. I bought the donor for $500 and sold ~$1000 worth of parts off it...
  4. Bextreme04

    Fuel injection conversion

    The 305 is notorious for being super sensitive to detonation when the ESC is not functioning properly and also being a total dog if you retard the timing enough to not detonate without it. You need to see if the FiTech documentation actually tells you what the spec is on the TPS. If it doesn't...
  5. Bextreme04

    Fuel injection conversion

    Holley owns MSD... it's the same one(even has the same part numbers). You can even see in the pictures that everything is labeled MSD and the TBI has MSD molded into the end of it.
  6. Bextreme04

    Fuel injection conversion

    Maybe we are all confused on what is being asked here. I read his initial post as his original quadrajet has an electronic TPS and he doesn't know what he is supposed to do with the original wire going to that when he swaps the FiTech on there. It seems like the GM TPS signal has always been...
  7. Bextreme04

    Fuel injection conversion

    86 is a Quadrajet with the electronic idle mixture valve. I think the TPS is only used for that and the ESC system... I don't think it has much of a "computer" like an 87 did.
  8. Bextreme04

    Advice and Parts recommendations for some 6.2 cam/valvetrain work?

    I used GM trays and Delphi LS7 lifters sourced through Michigan Motorsports. I used factory GM 6.2 headgaskets from Summit. They are only ~$30 each I think. I also did an ARP headbolt kit at the same time, because why not. You might want to run a compression test on it, both to see what the...
  9. Bextreme04

    Fuel injection conversion

    The FiTEch would replace that system, but I'm pretty sure it is used for the ESC system on those 305's... probably not the same signal. You DO know that you won't pass california smog with that system... right? The only CARB legal Carb to EFI conversion I know of is the MSD Atomic EFI...
  10. Bextreme04

    LS swap fuel system

    It has more to do with flex fuel and pump design. The newer stuff is PWM controlled and doesn't have a "regulator" at all. It is a returnless system that uses a fuel pump control module, PWM, and a fuel pressure sensor to keep the inlet pressure where it wants it at all times. My 2011 Suburban...
  11. Bextreme04

    Fusible Link?

    Interesting... you should have had a bunch of other inoperative stuff too then.
  12. Bextreme04

    Ruh roh Raggy! I hear you knocking…

    It's still at the shop? From when they did the work? And it didn't make that noise when you dropped it off? I just went back to he first post and re-read it... so the shop did a clutch replacement, then when you went to pick it up it is making this noise... and the tech who did the clutch...
  13. Bextreme04

    1985 K5 350 always running rich?

    Yep, properly tuned carb and put some cats on it. I'm running dual 3" heavy duty flowmaster cats right after the collector on the long tubes. H-pipe is right after the transfer case. This is on a slightly hopped up L29 454 and I'm using the same setup on my 2011 Suburban with the 6.2 LS setup...
  14. Bextreme04

    8.1 Vortec VS 383 Stroker VS 6.0 Iron LS

    Sooo... best case, you have a poorly tuned carb and you are getting 10mpg. If you drive your truck 20,000 miles in a year(not likely), you burn 2000 gallons of fuel in that year. If you spend the $1800 on the sniper(not including any engine work... which is going to be A LOT for a 383) you MIGHT...
  15. Bextreme04

    Ruh roh Raggy! I hear you knocking…

    Valvetrain noise and rod knock would be very similar speed, and yes.. much slower than that. That speed sounds like something hitting at crank RPM, but it isn't deep enough of a sound to be rod knock in my opinion. Sounds light and tinny to my ear in that video. Rod knock will be much deeper and...
  16. Bextreme04

    Ruh roh Raggy! I hear you knocking…

    My thought is that if you just had a shop do a clutch... did they maybe install too long of a bolt in the flywheel and its whacking something? dust cover bolts? It sounds too fast to be a rod and I'd be suspicious of the latest work being the issue.
  17. Bextreme04

    Big block Chevy valve lift

    I was thinking that at first, but he said he has check springs installed... which shouldn't compress much of anything
  18. Bextreme04

    Big block Chevy valve lift

    That's a hell of a cam for a truck... you mud bogging this thing? I bet it's gonna sound like an absolute beast... please post some pics and videos when you get it going. I don't really have anything for your problem.. maybe the lifters are collapsed? Have you primed it yet? Did you degree in...
  19. Bextreme04

    8.1 Vortec VS 383 Stroker VS 6.0 Iron LS

    You're gonna spend more for a holley sniper system than you would to just get an 8.1 or 7.4 with the trans, wiring harness, and computer included... Just saying. Also, the sniper system has it's limitations. Most of the really efficient head designs don't have a heat crossover and the TBI style...
  20. Bextreme04

    Alternator amps

    Nobody really makes a good readily available option. I would recommend that you look around and see if you can find a motor rewinder locally. They are usually right around the same cost as buying a new one, but they actually care about doing a good job and using quality parts. Not sure where you...
  21. Bextreme04

    8.1 Vortec VS 383 Stroker VS 6.0 Iron LS

    No. Testing conclusion is that you will make more absolute power with a carb properly tuned for the exact circumstances being tested. Efficiency is not even close. The EFI will beat out the carb hands down for efficiency in every situation. You don't go for EFI with the intention of more...
  22. Bextreme04

    Opinions on grounds needed

    Yes, and because the amperage is pretty low, they don't need much connection to the bed or core support to be totally fine. All turn signal and headlight issues I've had on two different squares were able to be tracked down to the way the ground wire itself was connected into the socket. The...
  23. Bextreme04

    Opinions on grounds needed

    Most light harness related ground issues are caused by the socket internally having an issue to the ground cable in my experience. Adding ground connections from body panels to the frame can be helpful, but it is usually due to the socket itself not having a decent ground.
  24. Bextreme04

    A couple more sensor questions

    I've seen lots of people use that port only because they are always jumping on the transmission forums to ask why their temps read so weird. If you use that port for the trans sensor you will only read what the case temp is, there is no fluid flow in that area, so the fluid at that port is...
  25. Bextreme04

    High Flow cats on a Blueprint 383

    I agree you won't hurt anything by putting on high flow cats. I just put a pair of 3" stainless flowmasters on with a set of long tubes to replace some worn out ones on my 2011 Suburban. It immediately jumped my fuel trims up 20%, so they definitely aren't taking anything away flow wise. I still...

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