will my car blow up??
21 September 2011, 09:30 AM
#1
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will my car blow up??
i have a 2003 Subaru Impreza wrx and u have brought a full stainless steel exhaust system with open neck 3 inch down pipe with sports cat and 2 1/2 inch decat centre pipe and back box with 5 inch tail pipeTaken of a 2004 sti uk turbo.
If i fit it will it mess my car up as im not planning to remap it???
If i fit it will it mess my car up as im not planning to remap it???
Last edited by william89; 21 September 2011 at 10:16 AM.
21 September 2011, 06:49 PM
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Yes, you will risk serious damage running it without a remap. Best advice would be to pm Duncan at Racedynamix on here for professional advice on remaps.
23 September 2011, 01:08 PM
#5
Utter nonsense,
Yes it is best practice to get it mapped as it will optimise your set up but to say your car will blow up if you don't is complete cack!
As for 50bhp gains for just an exhaust change , thats more than a little optimistic. Expect to see gains of around 15% tops.
As the car is maf based this should take care of the extra flow required by the exhaust.
So in short, yes get it mapped for best results but you're not going to blow your car to bits if you don't
Yes it is best practice to get it mapped as it will optimise your set up but to say your car will blow up if you don't is complete cack!
As for 50bhp gains for just an exhaust change , thats more than a little optimistic. Expect to see gains of around 15% tops.
As the car is maf based this should take care of the extra flow required by the exhaust.
So in short, yes get it mapped for best results but you're not going to blow your car to bits if you don't
23 September 2011, 01:24 PM
#6
I agree with Daz.
It's highly unlikely it'll blow up, but getting it mapped will definately get the most out of the mods you've fitted, and will make the car drive better, aswell as a power increase.
It's highly unlikely it'll blow up, but getting it mapped will definately get the most out of the mods you've fitted, and will make the car drive better, aswell as a power increase.
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23 September 2011, 01:35 PM
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Doesnt fitting an exhaust with less back pressure mean that you will be running lean?
Something to do with how pressure should push some exhaust gases back into the combuston chamber? it was a while ago i read this but was told its definately worth remapping to prolong engine life.
Something to do with how pressure should push some exhaust gases back into the combuston chamber? it was a while ago i read this but was told its definately worth remapping to prolong engine life.
23 September 2011, 01:46 PM
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agree with Daz the gains will depend on various things and to make the most of any mods the car will need a re-mapped. As for the car blowing up no it won't
23 September 2011, 03:54 PM
#11
Utter nonsense,
Yes it is best practice to get it mapped as it will optimise your set up but to say your car will blow up if you don't is complete cack!
As for 50bhp gains for just an exhaust change , thats more than a little optimistic. Expect to see gains of around 15% tops.
As the car is maf based this should take care of the extra flow required by the exhaust.
So in short, yes get it mapped for best results but you're not going to blow your car to bits if you don't
Yes it is best practice to get it mapped as it will optimise your set up but to say your car will blow up if you don't is complete cack!
As for 50bhp gains for just an exhaust change , thats more than a little optimistic. Expect to see gains of around 15% tops.
As the car is maf based this should take care of the extra flow required by the exhaust.
So in short, yes get it mapped for best results but you're not going to blow your car to bits if you don't
23 September 2011, 05:26 PM
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thanks for your replys, im getting the exhaust system fitted 2more, and the remap done on the 29th, i will let you all konw how its goes.
23 September 2011, 05:48 PM
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50bhp from an exhaust and map certainly isnt out of the question. My classic went from 218 to 274
And newage sti from 265 to 330bhp.
I'll let you do the maths. But people poo pooing a 50bhp increase havent a clue
And newage sti from 265 to 330bhp.
I'll let you do the maths. But people poo pooing a 50bhp increase havent a clue
23 September 2011, 06:42 PM
#15
I have been running a cobra turboback 3" syste, panel filter, fuel pump, perrin intake pipe etc for almost a yea with no remap yet, car has had no problems whatsoever.
I am holding back on fitting my vf24 and classic uppipe until funds allow for a proper remap.
I am holding back on fitting my vf24 and classic uppipe until funds allow for a proper remap.
Last edited by brendy76; 23 September 2011 at 06:46 PM.
23 September 2011, 07:24 PM
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William, heres some adviced based on my recent experience with a friends 2001 wrx.
When we bought it the car had a 3" decat exhaust system and panel filter, no remap, thats it.
When Duncan came to do a remap he said the car felt like it was making less than 200bhp.
We fitted a walbro pump (£50) which took about 40 mins and Duncan fitted a 3 port boost solenoid which we supplied (£25).
After this Duncan did an on the road map for Emma, running standard 95 RON unleaded and the car was transformed. Predicted figures are around 265bhp/270lb ft torque.
If you're going to have a remap do as much as you can before hand to save paying for tweeks later. A Walbro pump, air filter and 3 port solenoid are a MUST to get the best from the exhaust and map and will cost less than £100.
Hope this helps
When we bought it the car had a 3" decat exhaust system and panel filter, no remap, thats it.
When Duncan came to do a remap he said the car felt like it was making less than 200bhp.
We fitted a walbro pump (£50) which took about 40 mins and Duncan fitted a 3 port boost solenoid which we supplied (£25).
After this Duncan did an on the road map for Emma, running standard 95 RON unleaded and the car was transformed. Predicted figures are around 265bhp/270lb ft torque.
If you're going to have a remap do as much as you can before hand to save paying for tweeks later. A Walbro pump, air filter and 3 port solenoid are a MUST to get the best from the exhaust and map and will cost less than £100.
Hope this helps
23 September 2011, 07:38 PM
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Utter nonsense,
Yes it is best practice to get it mapped as it will optimise your set up but to say your car will blow up if you don't is complete cack!
As for 50bhp gains for just an exhaust change , thats more than a little optimistic. Expect to see gains of around 15% tops.
As the car is maf based this should take care of the extra flow required by the exhaust.
So in short, yes get it mapped for best results but you're not going to blow your car to bits if you don't
Yes it is best practice to get it mapped as it will optimise your set up but to say your car will blow up if you don't is complete cack!
As for 50bhp gains for just an exhaust change , thats more than a little optimistic. Expect to see gains of around 15% tops.
As the car is maf based this should take care of the extra flow required by the exhaust.
So in short, yes get it mapped for best results but you're not going to blow your car to bits if you don't
23 September 2011, 08:13 PM
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23 September 2011, 10:44 PM
#25
Interestingly I mapped one on the rollers last week - 2001 wrx where the owner had fitted a sports cat and decat centre and backbox and the peak power on the rollers before mapping was 215bhp over 2 runs that were both within about 2bhp of each other. Fueling was off the scale rich but no det.
After the remap it made 278.1 bhp which for a bug wrx still with sports cat was pretty pleasing.
2003 wrx are more likely to boost spike than a bug wrx and that may cause issues but at the very least wont feel good to drive and will certainly be a pita to have the CEL come on all the time and hoping that all is good. A remap will at least let you know all is good and will make it all sing together for more power and more power safely.
After the remap it made 278.1 bhp which for a bug wrx still with sports cat was pretty pleasing.
2003 wrx are more likely to boost spike than a bug wrx and that may cause issues but at the very least wont feel good to drive and will certainly be a pita to have the CEL come on all the time and hoping that all is good. A remap will at least let you know all is good and will make it all sing together for more power and more power safely.
26 September 2011, 12:19 AM
#30
You have a point Daz:
pundit mode: DON'T fit the exhaust and get a remap. Then see what BHP you get (a big gain because the mapper's wound up the boost and leaned off the excessive richness).
Then fit the exhaust and remap again. Then see what gains you get at the same boost levels.
The point will be obvious then: That being the exhaust doesn't do much - you'll get spool up at lower revs, but peak bhp isn't that much different.
pundit mode: DON'T fit the exhaust and get a remap. Then see what BHP you get (a big gain because the mapper's wound up the boost and leaned off the excessive richness).
Then fit the exhaust and remap again. Then see what gains you get at the same boost levels.
The point will be obvious then: That being the exhaust doesn't do much - you'll get spool up at lower revs, but peak bhp isn't that much different.