Full 3" system on newage with no remap.
30 December 2006, 03:30 PM
#1
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Full 3" system on newage with no remap.
I've just bought a full 3" straight through system for my MY01 Bug.
I've discovered that I have to fit the whole system as the exhaust won't mate up to the original downpipe as a "cat back".
If I fit the whole system including the downpipe am I risking damage to the engine if I don't get a remap? There is no way I can aford the £600+ for a remap but would love to fit the exhaust as it just cost me over £300 and is useless otherwise.
Cheers people!!
I've discovered that I have to fit the whole system as the exhaust won't mate up to the original downpipe as a "cat back".
If I fit the whole system including the downpipe am I risking damage to the engine if I don't get a remap? There is no way I can aford the £600+ for a remap but would love to fit the exhaust as it just cost me over £300 and is useless otherwise.
Cheers people!!
Last edited by jimboturbo; 30 December 2006 at 05:15 PM.
30 December 2006, 05:07 PM
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Also have 01 bug, done several search's on here and the overboosting problem kept cropping up if fitting full de-cat,but saying that i know someone on here who has done it with no prob's so far that i've heard.He did have a cell fix fitted though.
30 December 2006, 05:15 PM
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Is yours a WRX Gunner? From what I can gather from searches it seems to be he STIs that have the overboost issue.
I'd love to fit this exhaust but I'd feel a bit of a **** to say the least if the engine went bang because of it.
I'd love to fit this exhaust but I'd feel a bit of a **** to say the least if the engine went bang because of it.
30 December 2006, 05:44 PM
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Friend's car is wrx bug which has been done,i bought prodrive downpipe with the sport's cat to fit to my own as i have several other goodie's as well going on in the new year and will deffo need re-map. PM this guy pauld37 you will find his profile in the meet's section under Southern Dorset meet's . He is the one with the car done.
Last edited by GUNNER; 30 December 2006 at 05:46 PM.
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30 December 2006, 07:25 PM
#8
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my newage sti ran like a bag of spanners and was not happy with the full 3" exhaust in situ. Luckily my mapping session was completed on the same day.
30 December 2006, 07:28 PM
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just remembered I had my 18G fit at the same time which may have had a direct effect (although never used any boost on my way to map). Car idled erratically though in traffic.........
30 December 2006, 07:32 PM
#10
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fit a full 3" system and you do indeed run a risk of boost spikes and DET.
If you do not intend on having a remap straight away then the best thing to stop that boost spike is to fit a dawes device and reign in the boost.
Better safe than sorry.
If you do not intend on having a remap straight away then the best thing to stop that boost spike is to fit a dawes device and reign in the boost.
Better safe than sorry.
30 December 2006, 08:15 PM
#11
She will run.. but det like crazy after 5,500rpm mate.
You will need an uprated fuelpump too. You can fit the fuelpump and exhaust together and it will stop the det but she will be very very rich until you have it mapped.
It will det like crazy with just the pipe fitted. Personally id wait to have it mapped properly.. you say you cant afford £600 for a map... so can you afford £1500+ for a new engine when it melts a piston or ***** a big end bearing because you skimped on a mapping session?
Why not jump on this Group buy @ Mocom Racing.. £399 for a full mapping session.. you'd be nuts to pass it up.
https://www.scoobynet.com/group-buys...ml#post6371793
You will need an uprated fuelpump too. You can fit the fuelpump and exhaust together and it will stop the det but she will be very very rich until you have it mapped.
It will det like crazy with just the pipe fitted. Personally id wait to have it mapped properly.. you say you cant afford £600 for a map... so can you afford £1500+ for a new engine when it melts a piston or ***** a big end bearing because you skimped on a mapping session?
Why not jump on this Group buy @ Mocom Racing.. £399 for a full mapping session.. you'd be nuts to pass it up.
https://www.scoobynet.com/group-buys...ml#post6371793
30 December 2006, 11:32 PM
#12
Hmmm
Not sure if de-catting the WRX Bugeye with a TD04L Turbo will cause a shed load of problems. just not much of an advantage !
The Denso ECU has a lot of spare capacity to cope with changes, as long as the MAF and Lambda are in good order It should deal with a de-cat.
It will however throw CEL P0420 requiring a CEL fix or re-map to get rid of !!
The spool up should be a "bit" better (the TD04 spools up pretty early LOL) and the sound will change but not sure if there would be a noticable performance gain and possibly some loss due to the lack of back pressure
Personally I'd sell on the 3" exhaust..........then get rid of your centre cat, change the back box, fit a better panel filter and get the car mapped
Shaun
Not sure if de-catting the WRX Bugeye with a TD04L Turbo will cause a shed load of problems. just not much of an advantage !
The Denso ECU has a lot of spare capacity to cope with changes, as long as the MAF and Lambda are in good order It should deal with a de-cat.
It will however throw CEL P0420 requiring a CEL fix or re-map to get rid of !!
The spool up should be a "bit" better (the TD04 spools up pretty early LOL) and the sound will change but not sure if there would be a noticable performance gain and possibly some loss due to the lack of back pressure
Personally I'd sell on the 3" exhaust..........then get rid of your centre cat, change the back box, fit a better panel filter and get the car mapped
Shaun
31 December 2006, 01:38 AM
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Originally Posted by Midlife......
Hmmm
Not sure if de-catting the WRX Bugeye with a TD04L Turbo will cause a shed load of problems. just not much of an advantage !
The Denso ECU has a lot of spare capacity to cope with changes, as long as the MAF and Lambda are in good order It should deal with a de-cat.
It will however throw CEL P0420 requiring a CEL fix or re-map to get rid of !!
The spool up should be a "bit" better (the TD04 spools up pretty early LOL) and the sound will change but not sure if there would be a noticable performance gain and possibly some loss due to the lack of back pressure
Personally I'd sell on the 3" exhaust..........then get rid of your centre cat, change the back box, fit a better panel filter and get the car mapped
Shaun
Not sure if de-catting the WRX Bugeye with a TD04L Turbo will cause a shed load of problems. just not much of an advantage !
The Denso ECU has a lot of spare capacity to cope with changes, as long as the MAF and Lambda are in good order It should deal with a de-cat.
It will however throw CEL P0420 requiring a CEL fix or re-map to get rid of !!
The spool up should be a "bit" better (the TD04 spools up pretty early LOL) and the sound will change but not sure if there would be a noticable performance gain and possibly some loss due to the lack of back pressure
Personally I'd sell on the 3" exhaust..........then get rid of your centre cat, change the back box, fit a better panel filter and get the car mapped
Shaun
Jim
31 December 2006, 10:56 AM
#14
There are three cats on the MY01 bugeye... up-pipe, down pipe and centre. The Downpipe contains the front 02 sensor (pseudo wideband lambda) and the rear 02 sensor is for emissions checking.
I'd get rid of the middle cat and take the exhaust straight back from there keeping the downpipe cat and the front O2 sensor. No need to buy new and check the for sales sections and post in wanted.
Change to a good panel filter and a remap should see you with 245 odd BHP (up from your 215 at present) with better spool up and torque
The re-map can also get rid of the CEL associated with ditching the rear 02 sensor
Does this make sense ?
Cheers
Shaun
Shaun
I'd get rid of the middle cat and take the exhaust straight back from there keeping the downpipe cat and the front O2 sensor. No need to buy new and check the for sales sections and post in wanted.
Change to a good panel filter and a remap should see you with 245 odd BHP (up from your 215 at present) with better spool up and torque
The re-map can also get rid of the CEL associated with ditching the rear 02 sensor
Does this make sense ?
Cheers
Shaun
Shaun
31 December 2006, 11:16 AM
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Originally Posted by Midlife......
There are three cats on the MY01 bugeye... up-pipe, down pipe and centre. The Downpipe contains the front 02 sensor (pseudo wideband lambda) and the rear 02 sensor is for emissions checking.
I'd get rid of the middle cat and take the exhaust straight back from there keeping the downpipe cat and the front O2 sensor. No need to buy new and check the for sales sections and post in wanted.
Change to a good panel filter and a remap should see you with 245 odd BHP (up from your 215 at present) with better spool up and torque
The re-map can also get rid of the CEL associated with ditching the rear 02 sensor
Does this make sense ?
Cheers
Shaun
Shaun
I'd get rid of the middle cat and take the exhaust straight back from there keeping the downpipe cat and the front O2 sensor. No need to buy new and check the for sales sections and post in wanted.
Change to a good panel filter and a remap should see you with 245 odd BHP (up from your 215 at present) with better spool up and torque
The re-map can also get rid of the CEL associated with ditching the rear 02 sensor
Does this make sense ?
Cheers
Shaun
Shaun
you can get rid of the cell light by fitting a resister on your rear o2 sensor (cost about a £5) which will clear any alarms,but you may still get overboost,(my sti8 did untill it was mapped)not sure that wrx would be any different.
Other option remove cat up pipe replace with magnex,panel filter ,and re map and fit your exhaust will cost a bit more but should give 270 bhp approx and be "safe" with no issues
31 December 2006, 11:34 AM
#16
The car is a bugeye My01 WRX so came with 215 BHP out of the box
The TD04L turbo will simply be blowing out superheated air at high flow rates so best to exploit early spool up and low down pick up. 250 Odd BHP probably likely after re-map.
No need to get rid of the cat in the up-pipe as again TD04 not likely to generate enough hot air to desintigrate it. Mapping out the CEL is far more secure than a CEL fix IMHO.
The STi's were prone to boost spikes on de-cat before re-mapping but the smaler turbo on the WRX not such of a problem.
It all boils down to wether you want the car to be MOT friendly. If not bothered about MOT then decat from the turbo back, if you want to pass MOT then keep the downppe cat (either OEM or replace with a high flow).
Shaun
The TD04L turbo will simply be blowing out superheated air at high flow rates so best to exploit early spool up and low down pick up. 250 Odd BHP probably likely after re-map.
No need to get rid of the cat in the up-pipe as again TD04 not likely to generate enough hot air to desintigrate it. Mapping out the CEL is far more secure than a CEL fix IMHO.
The STi's were prone to boost spikes on de-cat before re-mapping but the smaler turbo on the WRX not such of a problem.
It all boils down to wether you want the car to be MOT friendly. If not bothered about MOT then decat from the turbo back, if you want to pass MOT then keep the downppe cat (either OEM or replace with a high flow).
Shaun
01 January 2007, 06:30 PM
#20
Scooby Regular
My brother in law has a 02 WRX with a Milltek 3" decat and a Powerstation remap and his car produces around 270/270
Another friend has an 03 WRX with a Magnex 2.5" decat downpipe/decat first centre section, plus a Janspeed backbox, KN Panel filter and a Powerstation remap and his car is 280/275
Both cars still have the cat in the uppipe.
Another friend has an 03 WRX with a Magnex 2.5" decat downpipe/decat first centre section, plus a Janspeed backbox, KN Panel filter and a Powerstation remap and his car is 280/275
Both cars still have the cat in the uppipe.
01 January 2007, 09:46 PM
#21
Jimboturbo
My apologies......I should have typed 265 BHP well spotted
IIRC the PPP for the early MY01 Bugeye was an extra chip and gave about 240 BHP...on a cold day....with a following wind....LOL
It's not all about BHP, what you want is a good spread of the powerband with the greatest area under the torque curve to give good drivability *cough* Bob Rawle *cough*
You still also want some safety margin against det given the small intercooler and hot air the small turbo kicks out.
Cheers
Shaun
My apologies......I should have typed 265 BHP well spotted
IIRC the PPP for the early MY01 Bugeye was an extra chip and gave about 240 BHP...on a cold day....with a following wind....LOL
It's not all about BHP, what you want is a good spread of the powerband with the greatest area under the torque curve
to give good drivability *cough* Bob Rawle *cough* You still also want some safety margin against det given the small intercooler and hot air the small turbo kicks out.
Cheers
Shaun
02 January 2007, 09:11 AM
#22
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Originally Posted by Midlife......
Personally I'd sell on the 3" exhaust..........then get rid of your centre cat, change the back box, fit a better panel filter and get the car mapped
Can't recomment it enough.
Richard.
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