Polar Performance chip
03 July 2010, 08:44 PM
#1
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Polar Performance chip
Hi all, I have just fitted the sender for my oil temp gauge - what a PITA !! - not gone over 90 degrees yet, so now I can see the oil pressure and temp I decided to fit my Polar Parformance chip. The car is a 96WRX with full decat, K&N Induction kit and a Turbosmart DV, it had a Z4 ECU and I had a RR printout with 287bhp 
.
After fitting the chip - I used a 7D ECU with the resistor cut and the chip fitted, I have to say I was not as impressed as I thought I would be. The boost has gone up from 12psi to 16psi but the car didn't feel any quicker anywhere, I didn't notice the supposed quicker turbo spool - in fact if I didn't know I had fitted it I would not have known
Cant tell if the 112mph limiter has been removed yet 
I cant even say its the weather cos it was not as hot today as it has been - if anything a degree or two cooler.
Maybe all I have gained is the ability to use 97 RON fuel instead of 99RON??
Any comments/observations would be much appreciated.
.After fitting the chip - I used a 7D ECU with the resistor cut and the chip fitted, I have to say I was not as impressed as I thought I would be. The boost has gone up from 12psi to 16psi but the car didn't feel any quicker anywhere, I didn't notice the supposed quicker turbo spool - in fact if I didn't know I had fitted it I would not have known
Cant tell if the 112mph limiter has been removed yet I cant even say its the weather cos it was not as hot today as it has been - if anything a degree or two cooler.
Maybe all I have gained is the ability to use 97 RON fuel instead of 99RON??
Any comments/observations would be much appreciated.
03 July 2010, 08:59 PM
#2
Well, you already had 287bhp - very healthy BTW, as the Z4 is rated at 260PS (256bhp) IIRC. But the decat and the fact that you no doubt have a healthy engine is responsible for the high figure. Although I'm a bit sceptical it's putting out a 'real' 287bhp with just those mods and at the Z4's boost level... You sure that's not 267?! 
...I think the Z4's boost level is either 0.9 or 1.0bar - 13 or 14.5psi, not 12 - so the PP chip has improved on this by 'only' 0.2bar at best.
Ultimately, your horsepower will be pretty much capped by the TM and/or 380cc to what you already had... although I would have thought you'd have 'felt' slightly keener acceleration through the low-mid rev range, with the PP's extra boost.
...I think the Z4's boost level is either 0.9 or 1.0bar - 13 or 14.5psi, not 12 - so the PP chip has improved on this by 'only' 0.2bar at best.
Ultimately, your horsepower will be pretty much capped by the TM and/or 380cc to what you already had... although I would have thought you'd have 'felt' slightly keener acceleration through the low-mid rev range, with the PP's extra boost.
Last edited by joz8968; 03 July 2010 at 09:28 PM.
03 July 2010, 10:08 PM
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It was definately 287, I have the RR printout in the cars' folder 
. I seem to remember that 12.7psi was quoted for a 96WRX and the Polar chip was 16.something, and the boost gauge sort of bears this out - it certainly hits the first mark after the 15 but you cant stare too long at the gauge!!!. I have a V4STi TMIC taht might help a bit but I can't really change the injectors as the chip was not designed for that - I will be in an ESL daughter board and loads more cash.
I reackon its as far as I can go with what is there, the engine seems to be OK as oil pressure is around 80psi when giving it some and the temp is below 90 degrees! cant be bad for nearly 110K miles.
. I seem to remember that 12.7psi was quoted for a 96WRX and the Polar chip was 16.something, and the boost gauge sort of bears this out - it certainly hits the first mark after the 15 but you cant stare too long at the gauge!!!. I have a V4STi TMIC taht might help a bit but I can't really change the injectors as the chip was not designed for that - I will be in an ESL daughter board and loads more cash.I reackon its as far as I can go with what is there, the engine seems to be OK as oil pressure is around 80psi when giving it some and the temp is below 90 degrees! cant be bad for nearly 110K miles.
04 July 2010, 10:28 AM
#5
Yeah, go for ESL Live (cheapest option - but excellent), stick some 440cc in there then get mapped. Should get around 310-320bhp on the v.4 TMIC (limiting factor of your hardware). If you approach dynamix on here, I think he can supply the MAFless based ESL! It's what you want fella.
You'll defo notice the jump from 287 to c.310-320!
Also, prob wise to stop at this bhp level as you have an old WRX with 110k on the clock - i.e. a 110k old weakest 'box and 110k old non-forged internals!
You'll defo notice the jump from 287 to c.310-320!
Also, prob wise to stop at this bhp level as you have an old WRX with 110k on the clock - i.e. a 110k old weakest 'box and 110k old non-forged internals!
Last edited by joz8968; 04 July 2010 at 10:32 AM.
04 July 2010, 10:42 AM
#6
Yeah, go for ESL Live (cheapest option - but excellent), stick some 440cc in there then get mapped. Should get around 310-320bhp on the v.4 TMIC (limiting factor of your hardware). If you approach dynamix on here, I think he can supply the MAFless based ESL! It's what you want fella.
You'll defo notice the jump from 287 to c.310-320!
Also, prob wise to stop at this bhp level as you have an old WRX with 110k on the clock - i.e. a 110k old weakest 'box and 110k old non-forged internals!
You'll defo notice the jump from 287 to c.310-320!
Also, prob wise to stop at this bhp level as you have an old WRX with 110k on the clock - i.e. a 110k old weakest 'box and 110k old non-forged internals!
and a 3 bar map sensor
04 July 2010, 10:58 AM
#7
Ha. Yes of course.
OP, your OEM MAP sensor is rated to 1.2 bar, so you can only run 1.15bar. You prob need to run >1.3bar to get that bhp, so as my94wrx eludes to, you need a OEM MAP sensor from a MY97/98 or MY99/00 car.
OP, your OEM MAP sensor is rated to 1.2 bar, so you can only run 1.15bar. You prob need to run >1.3bar to get that bhp, so as my94wrx eludes to, you need a OEM MAP sensor from a MY97/98 or MY99/00 car.
Last edited by joz8968; 04 July 2010 at 11:00 AM.
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04 July 2010, 02:42 PM
#11
But that said, you may as well get a 3bar one, as if you get the modding bug, then you will have future proofed yourself to nearly 2bar boost! i.e. you're not likely to need to run any replacement turbo higher than that, for road car usage!
Last edited by joz8968; 04 July 2010 at 02:57 PM.
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