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Thread: CTS Sensor

  1. #1

    Default CTS Sensor

    What's the correct CTS sensor for LSx engines without using the The STANDARD MOTOR PRODUCTS TX3 sensor? This is for a SBC head, not LSx head M12-1.5 fitting, unless an adapter is used. When I bought my Terminator X, I used a 2006 Corvette C6 CTS sensor. Holley Terminator X temp reads 20° lower, vs my Auto Meter gauge which has been spot on for over a year. I was able to use a IR gun to dial it in with the (Offset) built into the Holley EFI software. Just wondering if there's a correct GM LS based M12-1.5 sensor that won't need adjustment? I'm using a Standard Motor Products TX89 Corvette C6 CTS sensor. Also had the same issue with my MAT sensor. Thanks.
    Last edited by Duh Stig; 05-04-2020 at 11:09 PM.

  2. #2
    Join Date
    Dec 2009


    If you don't want to use the Standard Motor Products TX89, then use the OEM GM CTS. The LSx engine very popular, surely you can ascertain the part number (Google).
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 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, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 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 M/T Street Comp tires.

  3. #3


    I returned the Standard Motor Products. Bought ACDelco CTS & MAT sensors. Same issue, had to Offset both the sensors, just seems very odd for them to be off.

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