{"product_id":"aeromotive-66138-vaporworx-dual-pump-returnless-pwm-controller","title":"Aeromotive VaporWorx Dual Fuel Pump Returnless Pulse Width Modulation Fuel Module Controller Kit","description":"\u003ch4\u003ePrecision Dual Pump Fuel Control for Returnless High-Horsepower Street and Forced Induction Builds\u003c\/h4\u003e\n\u003cp\u003eThe Aeromotive 66138 is the VaporWorx PWM controller kit designed for returnless dual fuel pump applications in forced induction and high-horsepower street builds. Operating without a return line, this controller modulates two brushed fuel pumps via pulse width modulation, ramping output up and down with demand to keep pumps running at the lowest speed necessary for the current throttle and boost condition. The result is lower pump temperatures, quieter operation, and extended pump life compared to a constant full-voltage dual pump setup. A 3-bar MAP sensor provides boost reference for automatic output scaling across the entire boost range.\u003c\/p\u003e\n\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAeromotive 66138 returnless PWM controller for dual fuel pump configurations\u003c\/li\u003e\n\u003cli\u003ePulse width modulation matches pump speed to real-time fuel demand\u003c\/li\u003e\n\u003cli\u003eReturnless system compatibility, no return line routing required\u003c\/li\u003e\n\u003cli\u003e3-bar MAP sensor for boost-proportional pump speed control\u003c\/li\u003e\n\u003cli\u003eRemote mount design for flexible chassis placement\u003c\/li\u003e\n\u003cli\u003eCompatible with brushed-type fuel pumps in surge tank or in-tank configurations\u003c\/li\u003e\n\u003cli\u003eReduces pump heat and noise at cruise and idle\u003c\/li\u003e\n\u003cli\u003eSuitable for supercharged, turbocharged, and high-power naturally aspirated builds running dual pumps\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number (MPN)\u003c\/td\u003e\n\u003ctd\u003e66138\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eAeromotive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Line\u003c\/td\u003e\n\u003ctd\u003eVaporWorx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Type\u003c\/td\u003e\n\u003ctd\u003eReturnless PWM Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eDual Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMAP Sensor Included\u003c\/td\u003e\n\u003ctd\u003eYes, 3-bar type\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMount Style\u003c\/td\u003e\n\u003ctd\u003eRemote Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump Compatibility\u003c\/td\u003e\n\u003ctd\u003eBrushed-type fuel pumps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProp 65\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1 Aeromotive 66138 returnless dual pump PWM controller\u003c\/li\u003e\n\u003cli\u003e3-bar MAP sensor\u003c\/li\u003e\n\u003cli\u003eWiring harness and hardware for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eAbout Aeromotive\u003c\/h4\u003e\n\u003cp\u003eAeromotive has been at the forefront of high-performance fuel system engineering since 1994. Based in Lenexa, Kansas, Aeromotive designs and manufactures fuel pumps, regulators, filters, fittings, and complete fuel system solutions for street performance, drag racing, road racing, and extreme high-power builds. The VaporWorx line represents Aeromotive's demand-matched PWM fuel control technology for modern high-horsepower applications.\u003c\/p\u003e\n\n\u003ch4\u003eRelated Parts on Our Site\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/aeromotive-66171-vaporworx-returnx-triple-quad-pump-pwm-controller\"\u003eAeromotive 66171 VaporWorx ReturnX Triple\/Quad Pump SC Controller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/aeromotive-vaporworx-returnx-pulse-width-modulation-controller-kit-dual-pump-na\"\u003eAeromotive 66166 VaporWorx ReturnX Dual Pump NA Controller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/aeromotive-vaporworx-gen-2-cts-v-returnless-pulse-width-modulation-fuel-module-controller-kit\"\u003eAeromotive 66141 VaporWorx Gen 2 CTS-V Returnless Controller\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cstrong\u003eWhat is the Aeromotive 66138?\u003c\/strong\u003e\n\u003cp\u003eThe Aeromotive 66138 is the VaporWorx returnless dual fuel pump PWM controller kit. It uses pulse width modulation to manage two brushed fuel pumps in a returnless fuel system, scaling pump speed with boost pressure via an included 3-bar MAP sensor to match fuel delivery precisely to engine demand.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat is the difference between a returnless and return-type fuel system?\u003c\/strong\u003e\n\u003cp\u003eA returnless system regulates fuel pressure at the pump or fuel module and does not route excess fuel back to the tank through a dedicated return line. A return-type system uses a pressure regulator near the injectors and returns excess fuel to the tank via a return line. The 66138 is designed exclusively for returnless configurations, while the 66166 and 66171 are return-type (ReturnX) controllers.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat vehicles is the Aeromotive 66138 compatible with?\u003c\/strong\u003e\n\u003cp\u003eThe 66138 is a universal remote-mount controller compatible with any vehicle running a returnless dual brushed fuel pump configuration. Common applications include late-model GM LS and LT-swapped builds, Mustang and Dodge Challenger high-horsepower builds, and any custom chassis where dual in-tank or surge-tank brushed pumps are used in a returnless setup.\u003c\/p\u003e\n\n\u003cstrong\u003eHow does the 3-bar MAP sensor improve fuel pump control?\u003c\/strong\u003e\n\u003cp\u003eThe 3-bar MAP sensor reads intake manifold pressure and provides a real-time boost signal to the 66138 controller. As boost pressure climbs, the controller automatically increases PWM duty cycle to ramp both pumps toward full output. This eliminates manual tuning for most applications and ensures pump speed always matches actual fuel demand rather than running at fixed full speed.\u003c\/p\u003e\n\n\u003cstrong\u003eCan the Aeromotive 66138 be used with a surge tank?\u003c\/strong\u003e\n\u003cp\u003eYes. The 66138 supports dual brushed pumps in surge tank configurations as well as dual in-tank pump setups. Ensure your surge tank and pump selection are compatible with a returnless pressure control strategy before installation.\u003c\/p\u003e\n\n\u003cstrong\u003eIs the Aeromotive 66138 compatible with brushless fuel pumps?\u003c\/strong\u003e\n\u003cp\u003eNo. The 66138 is designed for brushed-type fuel pumps. Brushless pump controllers use a fundamentally different drive signal and frequency, and are not compatible with Aeromotive's current PWM VaporWorx controllers. Confirm your pump type before purchasing.\u003c\/p\u003e\n\n\u003cstrong\u003eWhat boost levels does the Aeromotive 66138 support?\u003c\/strong\u003e\n\u003cp\u003eThe included 3-bar MAP sensor covers boost levels up to approximately 29 PSI above atmospheric (approximately 43.5 psia absolute), suitable for most street and moderate track forced induction builds. For builds exceeding these boost levels, consult Aeromotive's technical team about alternative MAP sensor options.\u003c\/p\u003e\n\n\u003cstrong\u003eDoes the 66138 work with factory OEM fuel system control modules?\u003c\/strong\u003e\n\u003cp\u003eThe 66138 is a standalone controller and is not designed to piggyback OEM fuel system control modules (FSCM). If your vehicle uses an OEM FSCM, consider Aeromotive's BoostWorx or OEM piggyback series controllers that are specifically designed for FSCM-equipped platforms.\u003c\/p\u003e\n\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eConfirm your vehicle uses a returnless fuel system before installing the 66138.\u003c\/li\u003e\n\u003cli\u003eSelect a remote mount location for the controller with adequate clearance and away from heat sources.\u003c\/li\u003e\n\u003cli\u003eInstall the included 3-bar MAP sensor in the intake manifold or plenum.\u003c\/li\u003e\n\u003cli\u003eConnect PWM output wiring to each of the two fuel pump relays or directly to pump terminals per the included wiring diagram.\u003c\/li\u003e\n\u003cli\u003eRun the main power feed with appropriately gauged wire and fusing for dual pump current draw.\u003c\/li\u003e\n\u003cli\u003ePower up the system and verify MAP sensor signal at idle.\u003c\/li\u003e\n\u003cli\u003eConfirm fuel pressure stability at idle and partial throttle before full-power testing.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"Aeromotive","offers":[{"title":"Default Title","offer_id":46048607797327,"sku":"AER66138","price":668.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/Aeromotive_VaporWorx_Dual_Pump_Returnless_PWM_Kit.png?v=1784035009","url":"https:\/\/www.blackopsautoworks.com\/products\/aeromotive-66138-vaporworx-dual-pump-returnless-pwm-controller","provider":"Black Ops Auto Works","version":"1.0","type":"link"}