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Thread: Did I make a mistake?

  1. #11

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    I'll look at the Base Fuel Table. How long does the Learn process take? The timing is not controlled by the Sniper. I was trying to keep this simple for now. It has a MSD magnetic distributor, MSD 6AL & MSD Boost timing controller. Timing is locked at 30° and it starts taking out 1.5° for every 1 psi of boost starting at 4 psi. Probably a bit aggressive, but I'm trying to keep everything safe. It's hard to compare any timing because it was on E85 blow-through carb at 18 psi, locked at 30° no retard. The engine, well keep in mind I didn't build it. It's a 305 Chevy with mild worked heads and a mild cam, JW TH350 turbo with a 3200 converter. It's in a 2600 LB Datsun 280. I'm building a 355, but I thought it'd be good to get used to the EFI and have fun in the meantime. The odd thing is it pulls fine, it's just the instant that you hit WOT and it spits & sputters. I don't even think the RPM matters. Anyway, I have some race fuel in it. I'm going to make a pass at 3/4 throttle and see what happens.

  2. #12
    Join Date
    Dec 2009
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    Quote Originally Posted by Jodirte View Post
    How long does the Learn process take?
    Read this thread: http://forums.holley.com/showthread....7370#post47370 (Closed Loop & Learn Table - Especially posts #2, #6 & #11.)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #13

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    Maybe try more timing. Seems to me you don't have enough timing for it to pull hard. Also seems like you need to add fuel so the ECU doesn't have to use so much compensation. Datalog all of your runs and watch the CL Comp and the Learn Table. If you watch what those two numbers are, you'll be able to figure out what the Base Fuel Table wants and then you can manually adjust the table without waiting for the Learn Table to fill it out.
    Last edited by andyf; 10-15-2019 at 11:42 PM.

  4. #14

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    Quote Originally Posted by Danny Cabral View Post
    Read this thread: http://forums.holley.com/showthread....7370#post47370 (Closed Loop & Learn Table - Especially posts #2, #6 & #11.)
    Thank you. This is helpful.

    Quote Originally Posted by andyf View Post
    Maybe try more timing. Seems to me you don't have enough timing for it to pull hard. Also seems like you need to add fuel so the ECU doesn't have to use so much compensation. Datalog all of your runs and watch the CL Comp and the Learn Table. If you watch what those two numbers are, you'll be able to figure out what the Base Fuel Table wants and then you can manually adjust the table without waiting for the Learn Table to fill it out.
    Timing is not controlled by Sniper, but I do have it retarded pretty aggressively so I'm going to play with it. Someone else suggested the same thing on the Base Fuel Table, I haven't really messed with that portion of the system yet so I'll do some reading up and do that also.

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