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  1. L

    Sniper fuel line return

    ok yall believe it or not im still on this lol. my tranny shop has had the truck since late November doing a throttle bracket for it... the builder wanted to check over the truck to make sure the tranny didn't get smoked again and he found out that my bracket that holds the tv cable was flexing...
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    Sniper fuel line return

    I went and checked on the cable and it’s not too loose or anything so ima get ahold of the shop on Monday and ask ab the whole sniper setup and even thinking ab letting them have the truck to sort out the tranny so I won’t have to worry ab it while worrying ab the motor, one less thing to worry...
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    Sniper fuel line return

    It did run better, but I only drove it maybe 5 miles, tranny is 700r4 so it could be, I just gotta check it. The trans got less than 1000 miles on it as well, so fingers crossed. had to get it rebuilt right after the new motor, the only thing they did differently than stock rebuild is put a...
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    Sniper fuel line return

    So I ran that tune to the shop to put new gaskets and wires on otw back I did a baby ripper buuuuttt I think I lost 3rd gear, so ima check the cable to see if it’s loose or what, if my transmission is screwed then it’s still under warranty hopefully the shop will go thru with it, I haven’t...
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    Sniper fuel line return

    i didnt like how rough the graph was so i hit smooth all then saved the smooth version as a separate file to not lose the original, here is after the smooth, i would assume the graph would be better if it were smooth but i have no idea :)
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    Sniper fuel line return

    Alright so after some beers and alone time I got that timing table brought over, got some gaskets coming in and the thicker spark plug wires that is recommend for the sniper/hyperspark system, there were some numbers almost impossible to read but that’s just for the decimals, here’s what I got
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    Sniper fuel line return

    I’ll have to look up some videos for an example, just so I know what I’m listening for, right now I probably won’t be able to hear it cause of my header gasket but I’ll try out that table
  8. L

    Sniper fuel line return

    Sorry had a eventful weekend, I haven’t touched the truck in a while but I can put a data log overlay on the timing table and move it around yes, I still have been doing some digging ab this and i created a forum on gearhead efi as well...
  9. L

    Sniper fuel line return

    and I did some digging on this and it turns out the sniper doesn’t have a knock input and/or can’t read it
  10. L

    Sniper fuel line return

    So I checked this video out and made a base table with my numbers, but idk how this looks and I don’t want it to be stupid and mess something up so here it is
  11. L

    Sniper fuel line return

    It doesI can’t snap WOT or itll backfire, sometimes it’ll catch itself others it’ll die, and even easing into it will not “drop a gear to disappear” should I make that red area higher timing in a smaller area, I feel like even when I got wide open I’m still on the top right edge of the 0 deg boxes
  12. L

    Sniper fuel line return

    So I checked the wire for the knock sensor and it is not in the sniper so I’ll get that connected here soon but I was driving it at 18 degrees and noticed a difference but something still off so I pulled logs and the configuration and this is the timing table that the sniper made, now like I...
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    Sniper fuel line return

    What’s the knock sensor labled as in the logs, it’s not tied in with stock still is it?
  14. L

    Sniper fuel line return

    Before work I went and drove ab 20 miles and got some data logs, this is at the timing shown in the pic, it backfired when I tried to snap WOT but gradually opening let me get all the way open, def felt the timing could be raised. I then set the cranking timing down and raised idle started it...
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    Sniper fuel line return

    I’ll def keep an eye on all that I do run 93 octane in the motor cause that’s what the motor manual calls for, I’ll also play with the timing after a learning drive to see how that works is that your WOT timing? What are your timing values set at on the sniper screen, cranking was one that I...
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    Sniper fuel line return

    Yes I have the hyperspark which I was actually thinking a bit, the motor manual calls for 10 degrees idle 32 WOT for vacuum wouldn’t it differ from hyperspark timing? I don’t remember if it was this forum or my other that said they had a sniper on a 350 with vortec heads, was gonna see what kind...
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    Sniper fuel line return

    The only thing that I think read funny in the data log was my rpm it said it was like 64 million or sum crazy, it showed proper rpm on the 3.5 display while driving but the log file must’ve got messed up somehow I’m gonna get some more in my free time and when it’s road legal ofc
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    Sniper fuel line return

    It did some learning on the drive home but I don’t have tags or insurance so I wasn’t driving it anymore than I needed to, right before I pulled in the parking lot it died on me, I believe the computer learned a lil and set my idle a lil lower, we did adjust my throttle screw, I’m not to worried...
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    Sniper fuel line return

    I was SOOO close that pic was with the engine off but I ended up doing a box swap for the throttle bodies and the new one has no leaks, got it home but the wizard tune for the sniper isn’t enough, so if anyone has any tips or sites for a FIRST EVER time tuning I’d appreciate it, I’ve looked at...
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    Sniper fuel line return

    it’s strange bc we ran it the first day without and throttle linkages and just sitting there opening the throttle to see how the engine sounded (we had issues with stock timing control) and there were no leaks, it was when I was burping the coolant, letting it run on idle, my gpa came over and...
  21. L

    Sniper fuel line return

    So I’ve got a 90 k1500 with a mild built 350, I put a sniper and hyperspark ignition kit in it and the sniper is leaking fuel out of the return side, not near or out of the line or outlet but deeper in the throttle body dumping it down the side of the unit, Holley says a 3/8 return line is...
  22. L

    Please help! ‘90 k1500 tbi Chevy performance mild build crate motor

    I was also thinking ab doing an aftermarket ignition system, would that help the timing at all? I’ve done all the research as for what I’d need to install it, but can’t find anything on non-stock 350 tbi applications
  23. L

    Please help! ‘90 k1500 tbi Chevy performance mild build crate motor

    This is the best data pull we can do, both or knowledge and hardware restricts us from pulling more
  24. L

    Please help! ‘90 k1500 tbi Chevy performance mild build crate motor

    So we've been doing some thinking and getting wrenches thrown at us by life but I am still going on this, we marked the harmonic balancer and found out that the timing isn’t advancing, so at 2,000 rpm we set it to 32 degrees BTDC (as per the motors specs) drove it around and it doesn’t backfire...
  25. L

    Please help! ‘90 k1500 tbi Chevy performance mild build crate motor

    So I put a gauge behind the tbi and when we changed it with grips from when we had no gauge we blindly set it to 14psi (as seen in pic) So i cleared the screw head in the regulator and started to adjust it, going from 14-16 a 180 degree turn on the screw was ab half a psi gain, once I got to...

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