The new Grams 70 mm Drive-By-Wire Electronic Throttle Body for MX-5 2.0L NC-Miata is the perfect upgrade for the restrictive factory 65 mm Miata throttle body. The Grams throttle body is a Plug-n-Play direct OEM replacement that doesn’t require wiring or mounting adapters. These units are not remanufactured. Each throttle body includes all new components including a CNC machined billet 6061-T6 aluminum housing with a precision-honed oversized bore, a high-torque servo motor, and a proprietary Non-Contact Hall Effect TPS sensor. To ensure the best performance, throttle response and driveability, each TPS sensor is calibrated to meet the specific requirements of the vehicles engine management system. The Grams electronic throttle body is the perfect upgrade for both modified and stock engines with increased airflow and reliability demands.
· 30% increase in airflow over the stock 65 mm Throttle Body
· Precision Honed Oversized 70 mm Bore
· CNC machined billet 6061-T6 aluminum housing
· Aluminum Throttle Plate
· Factory Programmable Non-Contact Hall Effect TPS
· Optimized TPS Response Curve
· High-Torque Precision Servo Motor
· Plug-n-Play; No adapters needed
Bought this from Fab9, took a while to get here due to COVID no doubt. Once I had it, quick install in under 10 min. All required bits were in the box. Setup is quick and easy if you follow the instructions.
I have Cosworth SC NC Miata will the optional smaller pulley. I was making about 11.4 psi boost before fitting this and I make about 12psi now. Does not sound like a lot, but you can feel it. I intend to get the car re-tuned to take full advantage.
One thing to note is that if you are running a boosted NC, with close to 12psi you may get an engine code complaining about slow response from your MAP sensor. Fab9 has a fix for that, a new higher capacity sensor. I will hopefully receive mine soon to fix the engine code.
The throttle body is great. It arrived without the spacer and gasket. Once they arrived, installation was easy.