windmill84

Hi guys,

It's probably been asked a million times before, so I apologise in advance, but is it worth remapping a standard(ish) WRX? What sort of safe/reliable extra power is achievable?

If I were to get a few mods to make the extra HP more reliable (or to get more HP than just a remap), what do you recommend?

The car is a 2005 WRX with a Milltek catback on it currently.

Thanks in advance for your help/suggestions.

Tidgy

hell yeah remap is the single best mod you can do to any of them, peak and responce are both vastly improved

You'll find mapped properly you'll improve reliability and get better MPG as well.

decat and panel filter + map is a nice step up

RS_Matt

My first mod was a remap. Only had a back box de-cat centre and panel filter from previous owner and got to (218.7whp) 260bhp.


Is it worth giving the MAF sensor a quick spray with brake cleaner before a map?

Arch

iTrader: (59)

With thr ight mods and a decent map you can get a safe and reliable 280 BHP from a standard ish WRX with standard turbo.

Suggested mods
1. Remove catted uppipe and replace with STI non cat item
2. Remove catted downpipe and fit prodrive sports cat
3. Remove 3rd cat and fit prodrive cat delete pipe.
5. Straight through centre section
6. Decent back box
7. STI top mount IC for a bit of protection
8. Green or K@N panel filter
9. Remap

280 BHP and MOT and noise friendly.

Jolly Green Monster

iTrader: (4)

Definitely. Normally find they make similar to ppp figures with a custom map

slimwiltaz

I've just had mine remapped with a k&n pannel,sti tmic, decat exhaust, walbro fuel pump. Made 267bhp. rollers are known to be heart breakers to so I was well happy with the result

Jolly Green Monster

iTrader: (4)

I thought the op was talking about remapping a totally standard car with no mods.

slimwiltaz

With it saying ish at the end of standard I gathered light mods like exhaust ect not heavy mods.

Arch

iTrader: (59)

Simon I think the question was in two parts, first option standard car with a remap and a few mods then a remap.

Jolly Green Monster

iTrader: (4)

Oh okay. Well 260ish standard and remapped.

Here's a couple of lightly modded examples I have done this month

Sportscat downpipe and Decat centre section and fuel pump and remap


Just a Decat centre, otherwise standard and remap


Simon

windmill84

Hi guys, first of all thanks to everyone for the responses and suggestions, much appreciated.

Secondly, yeah sorry for the confusion, I was asking 2 different questions. My car currently is standard apart from the Milltek catback and I was wondering if a remap was worth doing on just that? My other question was, should I/do I need to get a couple of other bits (panel filter, STI TMIC, fuel pump etc) before I get a remap on the standard car to make it safer/more reliable?

I also now have a new question (sorry!), do I need to get an uprated fuel pump? What is the benefit of having one, and the risk of not getting one?

windmill84

Hi Arch, thanks for the great reply

I'm guessing if I got all that stuff I would need to get a remap at the same time? I suppose I couldn't drive it much until I got the remap? I'm just thinking of costs because a remap is going to be around £600-£750 including rolling road and I imagine the bits you mentioned aren't going to be cheap either?!

Thanks.

Dave Y

iTrader: (52)

Get all your mods together then pay for one remap.Decide on your mapper have a chat tell them what you want then they can advise what to fit.
Be warned it's a slippery slope this nodding lark. ��

Jolly Green Monster

iTrader: (4)

Fuel pump at this power level is more as a precaution as the standard pump is now 11years old and often struggles when the power and therefore demand for fuel is increased.

The standard tmic is man enough on standard turbo. Better to save the money for a downpipe imho.

Simon

windmill84

Thanks Dave, yeah I can see that I am at the edge of a slippery slope! I bought the car standard a few months ago and said I wasn't going to mod it, but I've already got the catback, whiteline ARB and droplinks! (don't tell the Mrs!)

windmill84

Thanks for the advice JGM/Simon, I'll look into a new fuel pump as well then

Does the STI up pipe mate up with the standard WRX downpipe? I've just seen an STI up pipe on ebay that's going cheap atm.......

RS_Matt

If he got the remap then added a Walbro at a later date would his car need a map tweak?

Maz

iTrader: (34)

If the original pump was okay and flowing well then no. However if it wasn't then the map would need a tweak. As fuelling on the original pump would have been compromised. Common sense dictates fuel pump upgrade first then map.

RS_Matt

Could a mapper tell if a pump had any weakness?

I've had a map on the OE and Walbro, I noticed a distinct change in the car after upgrading the pump, pops and bangs went and mpg improved so I thought maybe there is a need for a tweak. I've read a lot of split opinions in the past.

IainMilford

iTrader: (15)

Sti uppipe will fit and is a good mod, it fixes from the headers and up to the turbo, whereas the downpipe goes down from the turbo so not attached to each other

IainMilford

iTrader: (15)

I asked the same question as the OP once upon a time

Jolly Green Monster

iTrader: (4)

The walbro is a 255litre per hour pump the oe from memory 190 so even if the oe pump is 100% it is likely to run richer on boost and at certain loads with the uprated pump.

Pointless to map it on the oe pump if you intend changing it. Add all intending mods and then get it mapped.

If the pump is weak during mapping its something that can be seen if mapped knows what he is looking for. Which can mean a failed mapping session and more cost once changed or if the mapper has one in stock just the extra cost of the pump.

windmill84

Ahh I see, thanks for the info, now i feel silly!

Thanks again for the info. How do I know if the fuel pump isn't working properly/efficiently? Is there something I can look out for? Is it a common failure then, or do we upgrade them just because the standard pump can't handle the extra power?

Jolly Green Monster

iTrader: (4)

No way of knowing if the standard pump is upto the job until its mapped

IainMilford

iTrader: (15)

We all had to start somewhere

RS_Matt

Short of cutting out, will the car make a few unexpected pops and bangs if the fuel pump is struggling. Due to the car running so lean not even the fuel available ignites and burns in the exhaust?

Does the STI up-pipe fitted to a WRX require the Lambda resistor mod?

Arch

iTrader: (59)

The WRX up pipe has an EGT probe fitted which is essentially a cat on fire warning, once the up pipe is changed the sensor can be binned. The cel can be disabled by the mapper or stick a 2.2k ohm resistor across the plug.

Jolly Green Monster

iTrader: (4)

Not necessarily.

Yes as Arch says regarding uppipe