V5 V4 Cam differences? LINK G4+ ECU
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V5 V4 Cam differences? LINK G4+ ECU
Hi All,
I have a Link G4+ WRX V5/V6 ECU and need some help.
I own a UK spec Subaru Impreza GC8 V5 Turbo 2000 and am fitting a V7 STI block with V4 STI Heads into it.
This block and head combination came out of a V4 Impreza where it was working great.
I am using a V4 manifold but all the existing parts from my V5 including throttle body which I have retrofitted and is simply plug and play with the cars electronics.
Now I have asked someone online about compatibility and have been told that the problem will be that the cam gear for timing underneath the oil filler has a different configuration on the V4 than the V5.
I don’t quite understand this nor do I know if it’s true as the engine was working in a V4.
Is there a difference in cam gear between the V4 and V5?
If so how do I modify my previously professionally mapped G4 + ECU to recognise the difference in the cam gears whilst keeping the existing electrical setup of the V5?
Many Thanks
I have a Link G4+ WRX V5/V6 ECU and need some help.
I own a UK spec Subaru Impreza GC8 V5 Turbo 2000 and am fitting a V7 STI block with V4 STI Heads into it.
This block and head combination came out of a V4 Impreza where it was working great.
I am using a V4 manifold but all the existing parts from my V5 including throttle body which I have retrofitted and is simply plug and play with the cars electronics.
Now I have asked someone online about compatibility and have been told that the problem will be that the cam gear for timing underneath the oil filler has a different configuration on the V4 than the V5.
I don’t quite understand this nor do I know if it’s true as the engine was working in a V4.
Is there a difference in cam gear between the V4 and V5?
If so how do I modify my previously professionally mapped G4 + ECU to recognise the difference in the cam gears whilst keeping the existing electrical setup of the V5?
Many Thanks
#2
Scooby Regular
can't assist ECU wise but yes in general terms they are correct in terms of the cam gear / heads / cams being totally different on MY89 - MY98 cars
you also can't use 99> ph2 cam gear on earlier heads as the physical fitment is different
suggest you talk to your mapper
you also can't use 99> ph2 cam gear on earlier heads as the physical fitment is different
suggest you talk to your mapper
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#5
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I think the Link G4+ should be flexible enough to make it work but you'd better ask on the linkecu support forum. The trigger type selection seems to suggests it works the same on version 1-6. Maybe the connector on the cam sensor itself is different but perhaps the sensor type is similar. Comparing the base maps for V3-V4 and V5-V6 there are some differences in trigger arming threshold tables. It's better to ask the experts about this. Maybe Enginetuner will be able to answer this as well.
I use V8 JDM AVCS heads on my V5 G4+, for that I had to use the newage crank trigger wheel and then choose V7-V10 JDM trigger setting in the ecu (and some wiring changes for this of course).
I use V8 JDM AVCS heads on my V5 G4+, for that I had to use the newage crank trigger wheel and then choose V7-V10 JDM trigger setting in the ecu (and some wiring changes for this of course).
Last edited by Turbovin; 25 November 2022 at 12:39 AM.
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