shinzon
15+ Year Contributor
- 350
- 72
- Sep 11, 2006
-
St. Petersburg,
Florida
I recently purchased an EVO3 Intake manifold and have been looking at my options for 60mm throttle bodies. There is the venerable 1g turbo throttle body, but I'd prefer to go in a different direction.
I've been studying the throttle body from an EVOIV RS. Everybody knows that with the EVOIV they mirrored the engine so the throttle plate points towards the left side of the car. With a left hand drive car in this configuration, the plate would move in the opposite direction to the throttle plate on a 2G DSM.
The EVOIV is, obviously, right hand drive, and most crucially, where DSM/EVOI,II,III/USDM Evos have the throttle cable and actuator on the firewall side of the throttle body and the TPS on the front, the later JDM Evos (IV-IX) have it facing towards the front of the car and the TPS towards the firewall. This means that when you flip it around to bolt it to an EVOIII intake manifold, it puts the throttle actuator/cable on the firewall side and the TPS on the front just like we have it.
On a right hand drive EVOIII this wouldn't work, but when placed into a left hand drive car with the throttle cable pulling from the left side of the car, it'll open correctly. When the EVOIV throttle body is flipped around, the TPS even points towards the left side of the car like on a 2gT.
The only real hang-up that I can see is that, when mounted to an EVOIII intake, the Fast Idle Air Valve coolant ports are pointed towards the firewall, instead of towards the front of the car.
You could just run some new hoses and I'm sure they'd work fine, but I have a better answer. When searching for the gasket the EVOIV FIAV housing uses to mount to the throttle body, I discovered that it is the same part number as the gasket for a 97+ 2g 4G64 Sypder. In fact, a great many components are shared between the 54mm 97+ Spyder throttle body and the EVOIV. I don't have a 4G64 FIAV to compare, but after looking at pictures, it's the same shape, and bolt locations, with the only difference being the coolant lines point towards the front of the car like a 2gT so in theory a 97+ 4G64 FIAV housing should bolt onto an EvoIV throttle body.
The EVOIV TPS is the same part number as the four wire 2G Spyder TPS, and has the same ECU pinouts/wire order as a 2gT so this should work fine. I am unsure of whether a 97+ Spyder IAC would work in a 2gT as while it uses the same pins at the ECU, they are labeled differently and the wire order is different. The EVOIV IAC, on the other hand, uses the same ECU pins/wire order as a 2gT DSM, and it also seems that the EVOVIII/3GEclipse IACs are bolt in replacements for the EVOIV IAC, sharing the same ECU pinouts and wireorder.
Relevant IV Part Numbers:
Relevant 97+ 4G64 Spyder Part Numbers:
I've been studying the throttle body from an EVOIV RS. Everybody knows that with the EVOIV they mirrored the engine so the throttle plate points towards the left side of the car. With a left hand drive car in this configuration, the plate would move in the opposite direction to the throttle plate on a 2G DSM.
The EVOIV is, obviously, right hand drive, and most crucially, where DSM/EVOI,II,III/USDM Evos have the throttle cable and actuator on the firewall side of the throttle body and the TPS on the front, the later JDM Evos (IV-IX) have it facing towards the front of the car and the TPS towards the firewall. This means that when you flip it around to bolt it to an EVOIII intake manifold, it puts the throttle actuator/cable on the firewall side and the TPS on the front just like we have it.
On a right hand drive EVOIII this wouldn't work, but when placed into a left hand drive car with the throttle cable pulling from the left side of the car, it'll open correctly. When the EVOIV throttle body is flipped around, the TPS even points towards the left side of the car like on a 2gT.
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The only real hang-up that I can see is that, when mounted to an EVOIII intake, the Fast Idle Air Valve coolant ports are pointed towards the firewall, instead of towards the front of the car.
You could just run some new hoses and I'm sure they'd work fine, but I have a better answer. When searching for the gasket the EVOIV FIAV housing uses to mount to the throttle body, I discovered that it is the same part number as the gasket for a 97+ 2g 4G64 Sypder. In fact, a great many components are shared between the 54mm 97+ Spyder throttle body and the EVOIV. I don't have a 4G64 FIAV to compare, but after looking at pictures, it's the same shape, and bolt locations, with the only difference being the coolant lines point towards the front of the car like a 2gT so in theory a 97+ 4G64 FIAV housing should bolt onto an EvoIV throttle body.
The EVOIV TPS is the same part number as the four wire 2G Spyder TPS, and has the same ECU pinouts/wire order as a 2gT so this should work fine. I am unsure of whether a 97+ Spyder IAC would work in a 2gT as while it uses the same pins at the ECU, they are labeled differently and the wire order is different. The EVOIV IAC, on the other hand, uses the same ECU pins/wire order as a 2gT DSM, and it also seems that the EVOVIII/3GEclipse IACs are bolt in replacements for the EVOIV IAC, sharing the same ECU pinouts and wireorder.
Relevant IV Part Numbers:
- MD345739 THROTTLE BODY ASSY AC60-560 - Throttle Body Assembly
- MF241264 BOLT,ENG FR CASE WASHER ASSEMBLED,8X55 - Throttle Body to Intake Manifold Bolts QTY:4 - SAME AS 97+ 4G64 Spyder
- MD180361 GASKET,THROTTLE BODY - Throttle Body to Intake Manifold Gasket - SAME AS EVOVIII/IX
- MD128002 HOSE,COOLING WATER LINE 8X230 - Throttle Body FIAV hose
- MD160376 HOSE,THROTTLE BODY WATER RETURN 8X185 - Throttle Body FIAV hose
- MD614532 CAP,THROTTLE BODY INR - BISS Screw Cap - SAME AS 97+ 4G64 Spyder
- MD614948 ADJUSTING SCREW,THROTTLE BODY SPEED - BISS Screw - SAME AS 97+ 4G64 Spyder
- MD608806 O-RING,THROTTLE BODY INR - BISS Screw O-ring - SAME AS 97+ 4G64 Spyder
- MD614772 SENSOR,THROTTLE BODY THROTTLE - Throttle Position Sensor - SAME AS 97+ 4G64 Spyder
- MD614528 SCREW,THROTTLE BODY INR - Throttle Position Sensor to Throttle Body Bolts QTY:2 - SAME AS 97+ 4G64 Spyder
- MD614246 CLIP,THROTTLE BODY - Throttle Position Sensor Wire Retainer
- MD614304 ADJUSTING SCREW,THROTTLE BODY SPEED - Throttle Stop Screw - SAME AS 97+ 4G64 Spyder
- MD614305 NUT,THROTTLE BODY - Throttle Stop Screw Nut - SAME AS 97+ 4G64 Spyder
- MD614680 O-RING,THROTTLE BODY FAST IDLE AIR VALVE - Fast Idle Air Valve Housing to Throttle Body Gasket - SAME AS 97+ 4G64 Spyder
- MD614921 VALVE,FAST IDLE AIR - Fast Idle Air Valve Housing
- MF200052 SCREW,FUEL TANK MACHINE,5X14 - Fast Idle Air Valve to Throttle Body Screws QTY:4 - SAME AS 97+ 4G64 Spyder
- MD614715 SCREW,THROTTLE BODY INR - Idle Air Control Motor to FIAV Housing Screws QTY:3 - SAME AS 97+ 4G64 Spyder
- MD614246 CLIP,THROTTLE BODY - Idle Air Control Motor Wire Retainer - SAME AS 97+ 4G64 Spyder
Relevant 97+ 4G64 Spyder Part Numbers:
- MD628046 VALVE,FAST IDLE AIR - Fast Idle Air Valve Assembly. Standard makes this aftermarket: AC599
- MD348399 HOSE,THROTTLE BODY WATER FEED - Throttle Body Feed Hose
- MD173746 HOSE,ENG HEATER WATER BY-PASS - Throttle Body Water Return Hose
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