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Whizbang · 09-10-2008, 09:48 PM

S4 vs. S5 Compatibility Guide

The following are items that are not swappable between generations. Or advantages to swapping a part.

Engine and Components
-Alternator: You must change the wiring to use an S5 unit on an S4. The plug is different as is a signal wire to the ecu. No one would want to use an S4 on an S5, but the same is true if you wish to retrogress. The S5 is the same style as an FD alternator. I do not have the wiring chart for this! If someone has it, please let me know! Another good bit of information is that the alternator connecting plug on the S5/S6 cars are the same as a mid 90s Neon. See the thread here -> HERE

-ECUs: Ecus are different between years and models. See Ecu Codes above.

-MAF sensors: Quasi Swappable. They are of different design, and swapping requires changing the connector as well. Advantages are subjectional. The S5 version takes less space and by some considered "better".

-Engine (complete): The S5 engines were higher compression motors and are not a direct swap per say but can work with a little research (ie MOP change, etc).

-NA Manifolds: Swappable with modification. VDI system must be disconnected or modified to operate. Not too worthwhile.

-Throttle Bodies: There are some differences due to the difference in the Meter Oil Pump differences, but will bolt up in place of each other.

-TPS (Throttle Position Sensor): No, different.

-MOP: No. S4 are mechanical. S5 are electrical.

-Turbocharger: Sorta. The S4 and S5 have some fundamental differences which make it a little bit of extra work inorder to get to operate correctly. To use either, you need the entire setup with manifold (including the canister if using the s4).

Engine Parts
-Housings: There are a few differences:
1. For the Turbo Housings, the S5 rear housing has a threaded hole for the knock sensor. This is on the intermediate plate for the S4 models.

2. The placement of the spark plug holes is different between the S4 and S5 housings.

-Rotors: The S5 rotors have a higher compression ratio and lower weight than the s4 rotors.

S4 13b 6PI: 9.4:1 compression ratio ~10lbs
S5 13b 6PI: 9.7:1 compression ratio ~9.5lbs

S4 13b Turbo: 8.5:1 compression ratio ~10lbs
S5 13b Turbo: 9.0:1 compression ratio ~9.5lbs

Suspension

-Rear Sway Bar Links: S5 models use plastic ones, S4's use metal. A good idea is to upgrade to the metal ones. Or buy after market from Racing Beat.
-AAS(Auto Adjusting Suspension): Requires all controls to be swapped as well. Can only use factory struts. Not worth the time for the results.

Interior and Body Components
-The Stereo Surround: S5, made from rubber, doesn't crack like the S4 models.
-Idiot Lights and Cover Piece: Maybe be swappable as a set.
-Tail Lights: Yes, but putting S5 lights onto a S4 requires very minor alterations to make them fit.
-Gauge cluster: the S5 models have a different RPM limit (s5's have a redline of 9k)
-All body panels, spoilers, and related are interchangeable.
-All interior components unless otherwise stated should be checked for interchange before purchese due to differences in seat belt style and other nuisances.

Thanks to "josh18_2k" for information donations to this section.

09-10-2008, 09:48 PM	#1
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp Posts: 3,190 Rep Power: 20	S4 vs. S5 Compatibility Guide The following are items that are not swappable between generations. Or advantages to swapping a part. Engine and Components -Alternator: You must change the wiring to use an S5 unit on an S4. The plug is different as is a signal wire to the ecu. No one would want to use an S4 on an S5, but the same is true if you wish to retrogress. The S5 is the same style as an FD alternator. I do not have the wiring chart for this! If someone has it, please let me know! Another good bit of information is that the alternator connecting plug on the S5/S6 cars are the same as a mid 90s Neon. See the thread here -> HERE -ECUs: Ecus are different between years and models. See Ecu Codes above. -MAF sensors: Quasi Swappable. They are of different design, and swapping requires changing the connector as well. Advantages are subjectional. The S5 version takes less space and by some considered "better". -Engine (complete): The S5 engines were higher compression motors and are not a direct swap per say but can work with a little research (ie MOP change, etc). -NA Manifolds: Swappable with modification. VDI system must be disconnected or modified to operate. Not too worthwhile. -Throttle Bodies: There are some differences due to the difference in the Meter Oil Pump differences, but will bolt up in place of each other. -TPS (Throttle Position Sensor): No, different. -MOP: No. S4 are mechanical. S5 are electrical. -Turbocharger: Sorta. The S4 and S5 have some fundamental differences which make it a little bit of extra work inorder to get to operate correctly. To use either, you need the entire setup with manifold (including the canister if using the s4). Engine Parts -Housings: There are a few differences: 1. For the Turbo Housings, the S5 rear housing has a threaded hole for the knock sensor. This is on the intermediate plate for the S4 models. 2. The placement of the spark plug holes is different between the S4 and S5 housings. -Rotors: The S5 rotors have a higher compression ratio and lower weight than the s4 rotors. S4 13b 6PI: 9.4:1 compression ratio ~10lbs S5 13b 6PI: 9.7:1 compression ratio ~9.5lbs S4 13b Turbo: 8.5:1 compression ratio ~10lbs S5 13b Turbo: 9.0:1 compression ratio ~9.5lbs Suspension -Rear Sway Bar Links: S5 models use plastic ones, S4's use metal. A good idea is to upgrade to the metal ones. Or buy after market from Racing Beat. -AAS(Auto Adjusting Suspension): Requires all controls to be swapped as well. Can only use factory struts. Not worth the time for the results. Interior and Body Components -The Stereo Surround: S5, made from rubber, doesn't crack like the S4 models. -Idiot Lights and Cover Piece: Maybe be swappable as a set. -Tail Lights: Yes, but putting S5 lights onto a S4 requires very minor alterations to make them fit. -Gauge cluster: the S5 models have a different RPM limit (s5's have a redline of 9k) -All body panels, spoilers, and related are interchangeable. -All interior components unless otherwise stated should be checked for interchange before purchese due to differences in seat belt style and other nuisances. Thanks to "josh18_2k" for information donations to this section. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook Last edited by Whizbang; 03-31-2009 at 09:40 PM.