s4TB to S5 TB...tps question

sen2two · 01-03-2010, 03:59 AM

I did this a looong time ago and now i cant remember... friend is swapping from s4 manifolds/TB to S5 manifolds/TB. cant just plug the TPS in as far as i remember. so what wire goes where?

thanks...

13bboy · 01-22-2010, 10:56 PM

what r TPS?

FerociousP · 01-23-2010, 12:24 AM

the s4 tps is just the "narrow range". watch it move, and the plunger quits moving after 1/2 throttle or so. the s5 tps uses two sensors, a "narrow range" and a "full range"... watch the s5 tps and you will see what I mean. IIRC you should be able to wire up the "narrow range" part of the s5 sensor and leave it at that.

***FWIW, the s5 manifolds make more power because the VDI switches the intake runners (shortens them) at high rpm. If you can't control the VDI (which s4 can't), you aren't seeing any gains... if you use only the short runners, you are losing power down low. also, the other HP gains from s4 to s5 are from the new ECU and higher compression... so just switching the manifolds will probably be more of a hinderance than a help***

01-03-2010, 03:59 AM	#1
sen2two KTEC Join Date: Jan 2009 iTrader: (2) Posts: 642 Rep Power: 0	s4TB to S5 TB...tps question I did this a looong time ago and now i cant remember... friend is swapping from s4 manifolds/TB to S5 manifolds/TB. cant just plug the TPS in as far as i remember. so what wire goes where? thanks... __________________ what I have: 1985 Gs:12a All motor Drag car - 1973 Rx2: Play car What I had: 93 Touring: TRADED - 91 Coupe: TRADED - 90 GTU: RHD - 88 10AE: SOLD - 87 Base: SOLD - 86 Base: SOLD - 1985 GSLSE - 85 Gsl: SOLD - 80 Gs: TRADED - 1972 Rx2

01-23-2010, 12:24 AM	#3
FerociousP I-had-a-bad-experience... Join Date: Feb 2008 Location: M'boro iTrader: (2) Posts: 1,046 Rep Power: 18	the s4 tps is just the "narrow range". watch it move, and the plunger quits moving after 1/2 throttle or so. the s5 tps uses two sensors, a "narrow range" and a "full range"... watch the s5 tps and you will see what I mean. IIRC you should be able to wire up the "narrow range" part of the s5 sensor and leave it at that. *FWIW, the s5 manifolds make more power because the VDI switches the intake runners (shortens them) at high rpm. If you can't control the VDI (which s4 can't), you aren't seeing any gains... if you use only the short runners, you are losing power down low. also, the other HP gains from s4 to s5 are from the new ECU and higher compression... so just switching the manifolds will probably be more of a hinderance than a help* __________________ '15 Juke Nismo '06 MX-5 GT SOLD '04 S Silver RX-8 GT Track Day Use SOLD '90 Black TII vert w/ Sprint RE stock port/turbo DD dyno (242.6whp@5500rpm @12psi 8psi@redline) and (250ftlbtq@4800rpm @13psi) SOLD '89 GTUs 6p TII SOLD, '87 sport SOLD, '79 SA stock SOLD '91 B2600i 4x4 w/ Rx-8 LSD SOLD

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01-22-2010, 10:56 PM	#2
13bboy Rotary Fan in Training Join Date: Jan 2010 Location: australia iTrader: (0) Posts: 71 Rep Power: 15	what r TPS?