jono300

iTrader: (8)

Guys planning on getting my 2005 blobeye uk wrx mapped within the next few months, car is standard apart from Blitz nur spec cat back exhaust and k+n panel filter fitted, so okay keep hearing so many off you running your cars with sports cats etc thats it has now got me a bit confused ??!! dont want to go full decat as to be honest could not be bothered with the hassle off finding a friendly mot tester every year so just wonder if there is actually much to be gained by changing over to an mot friendly sports cat centre section or whatever it is I would need to go with the Blitz nur spec already fitted ??

if I keep the car as it is and just have it remapped am I deffinatly going to notice an immediatte all round difference ??
the last thing I want to do is have it remapped and then decide I should have really fitted a sports cat centre section and then have to have it mapped again if I decide to have one fitted.

so really all I am asking is would I notice a 100% difference in my car if keeping it as it is with just the Blitz cat back + k+n panel filter and having it remapped by one off the many highly recommended uk mappers ??

any other uk blob owners had a remapp on a similar spec car as my own- just wonder what difference you found with the remapp ?? appreciatte the quoted expected BHP figures that are given for before/ after the map but again real life terms want to know the day to day driving diference ??

daz1968

iTrader: (13)

Depends what you want really but if you just fit an uprated intercooler hose and 2nd cat delete pipe you should get similar results to ppp about 260bhp, if you also add a sports cat and sti decatted uppipe you may see another 15bhp, when I had my wrx I modded to ppp spec and yes it is much better than standard, I didn't think the extra expense and hassle was worth it for 15bhp. If I had wanted more I would have combined sportcat with turbo and injector upgrade, but I sold the car before doing any more to it

fingerscooby

I have a 2001 wrx bug, I am in the process of upgrading the engine and initially I had a ecutek remap along with a walbro fuel pump, green panel filter , tsl exhaust still had 2 cats. Saw an extra 50 bhp and Similar torque figure, well worth it. I am now getting fitted bigger tubo, pink injectors, sti uppipe, 3 port boost valve and remap should see a safe 330-340 bhp.

I would recommend getting as many upgraded parts you can afford and then do the remap, saves you cash in. the long run. Hope this helps.

fingerscooby

I have a 2001 wrx bug, I am in the process of upgrading the engine and initially I had a ecutek remap along with a walbro fuel pump, green panel filter , tsl exhaust still had 2 cats. Saw an extra 50 bhp and Similar torque figure, well worth it. I am now getting fitted bigger tubo, pink injectors, sti uppipe, 3 port boost valve and remap should see a safe 330-340 bhp.

I would recommend getting as many upgraded parts you can afford and then do the remap, saves you cash in. the long run. Hope this helps.

jono300

iTrader: (8)

Okay cheers mate appreciatte that, my uk wrx is supposdly running 225BHP, so would certianly not think I would see 260BHP with just the intercooler hose and sports cat mod !!

no as I say if I thought there was not really much to be gained by fitting a sporst cat and deffinattly having the remapp I would be more than happy at that level off tune.

basically dont want to change the exhaust from what it is but is that false ecconomy if spending on a remap ??!!

as I say looking to here from blob owners who have been in a similar situation and here there remap views ??

Jolly Green Monster

iTrader: (4)

Normally see ppp figures on a wrx on standard exhaust and remap and upto 280bhp and 280lb with sportscat or decat etc.

Well worth having mapped, it actually accellerates in 5th once mapped

Simon

tubbytommy

iTrader: (20)

until the gearbox breaks

Jolly Green Monster

iTrader: (4)

If box breaks at that its either well abused or faulty / old oiled etc

Run wrx blob box at 400bhp no issues.

Simon

andythejock01wrx

Yeah, I remember being chuffed at having a car that didn't require a downchange to pass something on the motorway after remap on a sports cat annd other cats removed on my old 2001 WRX (273 bhp in my case).

andythejock01wrx

Not at 280bhp/280ft/lb

andythejock01wrx

Hey Simon.

My bug box went at 301bhp, but I'll never know how it was used before I bought it of course (FSH). Used to rev it pretty hard when warmed it up, launched it twice. 3rd stripped on heavy acceleration!

I have no plans to launch my 2006 T20 Spec C with 360bhp!

DonNedly

iTrader: (10)

The remap was by far the best spend i've my made on my car. You cannot get more horses per pound spent.
My blob is decat, K&N panel filter, walbro fuel pump and went from 225bhp to at least 280bhp. You will definitely feel the difference. Its a totally different car. The difference in torque is immense and the delivery of power throughout the rev range makes it so much more drivable.

Jolly Green Monster

iTrader: (4)

Unusual to go at that.

Spec box will take a lot more

jono300

iTrader: (8)

Okay cheers guys really do appreciatte tehe above advice glad I asked now !!

okay if I do decide to go for a second cat delete pipe what is my options to mate up with the Blitz nur spec cat back exhaust thats on its just now ie. what is the recommended makes / prices ??

is there two cats on the blobeye as it is ?? and just to confirm removing the one cat is mot friendly ?? any louder with cat removed / any notice with regards mpg ??

lastly- estimated 15BHP with just one cat removed what you talking with a full decat exhaust on the blobeye ??

Norman Dog

iTrader: (1)

There are 3 cats on the Blob WRX, you're best off removing them all and adding a Sportscat.

Someone on here selling a prodrive cat which will fit your car with minor adjustments.

https://www.scoobynet.com/subaru-par...age-parts.html

Click on My Car, I have a similar setup.

jono300

iTrader: (8)

Okay cheers, so there are 3 cats on the car as standard, does a sportscat take care off them all or do you have to by a sportscat to replace each section you are removing ??


and just to confirm removing the three standard acts and replacing with sportscat will pass mot ??

daz1968

iTrader: (13)

Yes if you fit sti up pipe then a sti prodrive sportcat down pipe and a second cat delete pipe will pass an Mot no problem, also if you keep your up pipe and down pipe and just fit a second cat delete it will also pass Mot, also if you leave your standard downpipe cat and fit decatted up pipe and second cat delete this will also pass, I tried all on my wrx, but I found that just following prodrive wrx spec of intercooler hose second cat delete and backbox along with a prodrive map a good set up. So if you just fit intercooler hose and second cat delete followed by a remap will be very good for little expense,

jono300

iTrader: (8)

Excellent mate again really do appreciatte the advice- sorry for all the newbie questions but with you now !!

as I say already have the excellent Blitz nur spec cat back exhaust, the intercooler hose has been changed also ( thought the change off hose was 99% cosmettic anyway ?? !! ) so to be honest was not really wanting to start making big changes prior to remapp.

will probably just change the second cat delete , fit a Walbro pump and then get it mapped and leave it at that.

any idea the cheapest second cat delete pipe ( whats the official name so I know what I am looking for in parts catalogues ?? ) I could buy to mate with my Blitz nur spec back box - rough price ??

daz1968

iTrader: (13)

If your exhaust fits to standard 2nd cat then will fit to any cat delete pipe, I picked up a genuine prodrive one used for about £50, it is very good quality and fits perfect, even still has cat heatshield in place so looks like cat, it has a tube to hold the sensor out of main exhaust flow so didn't throw a cel even with STD map, other than getting one of these Haywood and Scott are good if you want new,

kewe

iTrader: (4)

Haven't done this yet, but I thought you could get decent gains (240-250bhp?) with just the following mods:-

SS Backbox with straight (de-resonated?) centre pipe
Good Replacement Panel Filter i.e. K&N
Walbro Fuel Pump
Remap

But that would leave all the Cats in place.

So I guess it's that original question of the cost of removing and replacing the cats being worth it?

richgreenscooby1

iTrader: (2)

Yeah your right , if you read enginemappers thread in project section thats exactally what he is up to , checking to see what actually makes a difference , have a read ,, will kill a couple of hours ..

kewe

iTrader: (4)

Cheers I'm off for a read - should be interesting!

jono300

iTrader: (8)

**************
240-250BHP ?? would be looking for slightly more than this figure with all the above mods you listed !! car is 225bhp standard. a very expensive extra 15-25BHP extra !!

kewe

iTrader: (4)

Yeah just reading the thread Rich posted they were getting these figures with just a remap and no modifications at all. IIRC Whealers Dealers got about 245BHP with mostly above mods mentioned, begging the question how much difference do mods make? I'm sure there's plenty folk getting 270-280BHP with the mods. Then up to 300bhp with decats etc.

richgreenscooby1

iTrader: (2)

I think that sums it all up really

EngineMapper @ Group B Motorsport

Had a blob wrx on the dyno Fri morning with a cat-back and filter which made 282bhp and 300lb/ft. Now to be honest that's rare to get those figures just from a map with those mods, but 250-270 is usual with a healthier increase in torque usually.

Very noticeable, much more drive-able and the cheapest pound per bhp mod that you could do.

Graham

jono300

iTrader: (8)

Okay thanks mate 282BHP with just a cat back and filter now that is impressive !!

bit confused when you say mods what mod is a cat back ?? my understanding was a cat back is just a replacment back box and length off pipe ie from the last cat backwords - yep ?? always thought a replacment cat back - in my case the Blitz nur spec did not actually improve BHP just gave a healthier noise ??

if I decide to change the fuel pump to a Walbro can this be done after the car is mapped or would it require a tweek once fitted ??

if I leave the front cats on up pipe and down pipe and just change the last one on the blobeye can I do away with the cat altogether or does it have to be a sports cat to still pass an mot emissions test ?? a sports cat just replaces each original cat ie the blob has 3 original cats so would require three seperate sports cats / or a total decat or !! just a sports cat at the back ??

with me ??!!

going to keep the Blitz nur spec cat back so just want a few links to suitable sports cat or de cat pipes if anyone could advise ??

daz1968

iTrader: (13)

If you just fit a 2nd cat replacement pipe as per wrx ppp will pass mot no issues with standard up pipe and downpipe cat still in place this is exactly how a wrx ppp is. This pipe along with an intercooler hose and your exhaust as is and a prodrive equivalent remap should see about 260bhp. If you think the expense and hassle of a decat up pipe and sports cat downpipe on top of this along with a fuel pump is worth an extra 20bhp then go for that, but I chose to just go to ppp spec only exhaust bit you need is as per this item
http://www.haywardandscott.com/subar...-cat-pipe.html

Or you may get a used genuine prodrive pipe for around half this price.
Just get it fitted at an exhaust place as the sensor can be a pig to get out and is much easier to change on a ramp

The wrx ppp doesn't upgrade the fuel pump but for the sake of about £70 might be worthwhile in case yours is worn but not essential. It will defo make the car a lot better. I fitted all ppp parts to my car, intercooler hose, 2nd decat and backbox then had a remap and must say was good value for money, you can fit the 2nd decat and car will run fine then get a remap when you can.

lloyd6240

On MY03STI ppp blob I have 3" zero cats, panel filter and Ecu tek remap and running at 323 HP and 298 torque.

jono300

iTrader: (8)

***

Perfect mate really do appreciatte your excellent advice, sorry if I took a bit off a while to fully understand it all but with you now !!

reading back your earlier reply yes I think for the hassle off changing / price of changing the front up / down pipes for relativly little gain - 15BHP ?? I think I will just keep to the one change as you recommend.

according to another thread I started the PPP kit did have the uprated walbro fuel pump ?? but no probs anyway may just get that and the new exhaust section and then that will be it ready for the remap.

thanks again guys as always really appreciatte the info given.