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advice to be faster lighter better (like aol)
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Old 07 Apr 2004, 09:37 PM   #1 (permalink)
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advice to be faster lighter better (like aol)

:twisted: HI i just bought a 2004 wrx (yeah) and after that a turbo guage, turbo timer, cat-back, short throw shifter, and cold-air intake. im looking now at Manual Boost controls and Bov's what do you think about go fast bits atomic boost control and the wrx specific BOV by GFB. I'd also like to get a pulley set but don't know if there is a set out there for the 2004. what do you think about grounding kits, engine management, and getting lighter. I'd appreciate any help as " im an excellent driver" but dont know too much about engines.
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Old 07 Apr 2004, 10:07 PM   #2 (permalink)
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Hows it?

Fair play to your mods - i think you need to register here and help out!

Looks as if AEM have produced a pulley kit for the 2002 + WRX http://www.wrxtuners.com/parts/default.php?cPath=47

Unorthodox doesnt seem to have produced one yet as they have quoted "This set will not work with 2004 models because of differences in the power steering pulley, a new setup for the '04s will be released shortly from UR"

Cant say i tried the BOV yet (soon i promise :shock: ) but all the reviews are impressive -
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Old 08 Apr 2004, 06:42 AM   #3 (permalink)
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Turbo smart bov are available for the 2004 wrx from Demon tweeks if i remember correctly

got ot go for the supersonic though m8
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Old 13 Apr 2004, 06:45 PM   #4 (permalink)
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To be honest, all the BOV will do for you is make noise- there is virtually no performance benefit from changing out your stock BOV. Regarding the pulleys, the GFB set for the older New Age bodystyle cars will fit your 04 fine.
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Old 13 Apr 2004, 10:02 PM   #5 (permalink)
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Sorry guys but I have to disagree with the BOV not making any difference to performance.....

I ran the stock oem recirc valve since buying the car 6 months ago and had always been a bit disappointed by the Lag. However a month ago I purchased a HKS SQV Blow off valve and it has made quite a difference to the way the car drives. It has virtually eliminated the Lag factor and unlike other VTA's I have had no problems with idling etc. When changing up under fast road conditions I find that the revs don't drop so quickly and I can keep the car in the power band so much easier. I can however say that I ran with a Forge VTA on my prev WRX and it was cr@p to be honest. I took it off and sold it having only had it fitted for a week. This is talking from honest recent experience.

Hope this helps ?
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Old 14 Apr 2004, 07:54 PM   #6 (permalink)
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Nelson
I read with interest your comments about the Forge vta bov. How did you feel it affected the performance of your car?

I'm asking because in october 03 i fitted a forge, it was done at the same time i changed to an induction kit, magnicor leads and hks iridium plugs.

If i'm honest over the last 2 months the car isn't running as good has it should ie when on gentle acceleration it feels like it slightly holding back, but uder harder acceleration it seems ok. Does that ring any bells to you?

i thought that maybe it was the induction kit but now you have planted a seed :?
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Old 14 Apr 2004, 10:28 PM   #7 (permalink)
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Well Newie I don't want to be the bearer of bad news but thats exactly what happened to mine. I believe it has something to do with the Forge VTA being sold stock with a weak spring....what happens is that under light/part throttle the VTA begins to open leaking valuble boost pressure, with heavy throttle the problem is overcome. You can however contact Forge direct and they will send you Free of Charge an upgrade kit for your Dump Valve which has a different coloured spring (Red I think) and it is a lot stronger which in turn should stop the problem. Apart from the holding back I was also finding the Forge to cause jerking when lifting off the throttle and after a short while I removed it and actually fitted a Forge Recirc...which restored the car to its former glory

Hope this helps ?
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Old 14 Apr 2004, 10:39 PM   #8 (permalink)
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Karl
your spot on with that diagnosis 8)

Do you reckon ( being our technical leader) you could construct a letter for me to said to Forge...... pretty please
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Old 14 Apr 2004, 10:47 PM   #9 (permalink)
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Leave it with me Newie - I'll see what I can do for you

Can you pm me with when you bought it and from where - if you can remember that is - so I can quote this in the letter
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Old 14 Apr 2004, 10:53 PM   #10 (permalink)
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still got the receipt will sort it out tomorrow

Thanks mate
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Old 14 Apr 2004, 10:55 PM   #11 (permalink)
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Itsa no problem

I will no doubt draft the letter over the weekend and mail it to you
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Old 14 Apr 2004, 10:58 PM   #12 (permalink)
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Cheers again for that
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Old 15 Apr 2004, 07:14 PM   #13 (permalink)
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Re: advice to be faster lighter better (like aol)

I think the BOV is a waste of your hard-earned money...unless you've upgraded to a much larger turbo...or just want to hear the "whoosh" when you shift gears. Otherwise, the stock unit is completely sufficient. But, if I were going to by an aftermarket BOV, it would be the Forge unit, or the Go Fast Bits one. Whatever you do, don't get a 100% atmospheric BOV. Your Subie needs the recirculation the stock BOV provides.

Also, your American counterparts have determined that the cold air intakes are not a good idea on a WRX...without proper tuning. For reference, see this thread at NASIOC. http://forums.nasioc.com/forums/show...hreadid=477393

There's also a FAQ on BOVs there...
http://forums.nasioc.com/forums/show...hreadid=468038

I have a home-made grounding kit on my wagon. It made a noticible difference in the smoothness of the car.

The turbo timer is also unneccessary on the WRX, as the turbo has a cooling chamber that eliminates the need for a timer. You can read about it on Subaru's site.

I highly recommend aftermarket engine management...especially if you do much modding. But, I've heard that COBB's ECU reflash is also a good way to go. I have a unichip, myself...though I haven't installed it, yet. I also have a TXS manual boost controoler that will go on at the same time as the chip. I'm waiting until I can make a trip to Dallas to get the car dyno-tuned before I do the install.

As far as pulleys go...I'd stay away from the underdrive units. A lightened stock diameter set will free up some hidden HP...with no electrical issues (like dimming headlights).

Happy Motoring...

Richard
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Old 15 Apr 2004, 09:53 PM   #14 (permalink)
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Richard

Interesting post mate - noted about your thoughts on the BOV but speaking from experience I can honestly say that the BOV for me definitely made a big difference to the way the car drives. As I say I have fitted a HKS SQV and the amount of Lag I get between gear changes is now minute. There is a big debate about whether recirc or VTA are the best way to go but having tried various setups on my prev WRX and my current Scoob I can say that the HKS is by far the best valve I have fitted....this is said having fitted a Forge VTA, oem Denso recirc, Forge recirc in the past. I have not upgraded my Turbo as I am running with the standard smaller TD04 unit and the car is running about 16.5psi via the Prodrive ECU, certainly not 'Monster' power
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Old 16 Apr 2004, 05:29 PM   #15 (permalink)
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To throw my pennies worth in, had my scoob for about 6 months and have just fitted a bailey dump valve. Straight away I noticed a difference, taking it up through the gears it does seem to pull better as there is less lag.

Having read the above post from westside, I will be fitting my pipercross induction kit very soon, do you recon a ecu reset would be a wise idea then???

Buzz
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