Porting standard headers.....
#2
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Note: I haven't done this yet.
I was quoted £150 to port them with another £150 to remove/fit. I assume that includes the up-pipe too.... So not cheap as chips.
Compared to aftermarket...
- The power gains (if any) aren't as large.
- You retain the exhaust rumble, most aftermarket headers sound different. (though it's often said that aftermarket headers make the car quieter).
- Turbo spool-up should improve, aftermarket headers will typically make it worse.
- Fitting aftermarket headers should probably be followed by a remap.
J.
I was quoted £150 to port them with another £150 to remove/fit. I assume that includes the up-pipe too.... So not cheap as chips.
Compared to aftermarket...
- The power gains (if any) aren't as large.
- You retain the exhaust rumble, most aftermarket headers sound different. (though it's often said that aftermarket headers make the car quieter).
- Turbo spool-up should improve, aftermarket headers will typically make it worse.
- Fitting aftermarket headers should probably be followed by a remap.
J.
#4
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Compared to aftermarket...
- The power gains (if any) aren't as large.
- You retain the exhaust rumble, most aftermarket headers sound different. (though it's often said that aftermarket headers make the car quieter).
- Turbo spool-up should improve, aftermarket headers will typically make it worse.
- Fitting aftermarket headers should probably be followed by a remap.
- The power gains (if any) aren't as large.
- You retain the exhaust rumble, most aftermarket headers sound different. (though it's often said that aftermarket headers make the car quieter).
- Turbo spool-up should improve, aftermarket headers will typically make it worse.
- Fitting aftermarket headers should probably be followed by a remap.
If ported properly as shown in tests the standard headers can almost have as good gain as the cheaper aftermarket sets.
Aftermarket headers again depending on which ones will improve spool up. And dramatically with a remap.
The power gains if done correctly can be 25bhp/25lb-s torque. Which is considerable!
Aftermarket headers do change the note, but not quieter. Sounds more like a motorbike on full chat.
#5
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£150 to remove and refit...
Depends on the older car they are a **** to remove the heatshields to get the turbo sometimes.
Normally takes an hour to remove and refit the headers, if the uppipe is coming out then that obviously takes alot longer. Just porting the std items though you will leave the uppipe in place.
Depends on the older car they are a **** to remove the heatshields to get the turbo sometimes.
Normally takes an hour to remove and refit the headers, if the uppipe is coming out then that obviously takes alot longer. Just porting the std items though you will leave the uppipe in place.
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Originally Posted by BOB'5
AFAIK turbo is slower to spool with aftermarket headers.
Sorry for being a bit dim in this area
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I've got some ported headers for sale here...
http://bbs.scoobynet.co.uk/showthread.php?t=441983
I will fit them for a lot less than £150![Wink](https://www.scoobynet.com/images/smilies/wink.gif)
PM me if interested
http://bbs.scoobynet.co.uk/showthread.php?t=441983
I will fit them for a lot less than £150
![Wink](https://www.scoobynet.com/images/smilies/wink.gif)
PM me if interested
#12
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Originally Posted by BOB'5
AFAIK turbo is slower to spool with aftermarket headers.
#13
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Ported headers are on my to do list to accompany a bigger turbo. I'm a bit confused by the terminology. I have been told about polished oem headers, ported oem headers and ported and matched oem headers. As far as I can understand it, ported and matched is the best option, as matching optimizes the gas flow and headers are best left a bit rough to get the gases flowing - not too polished. Aftermarket headers is different again - I likes me burble so am quite happy with unequal length. However, is there a quality unequal length aftermarket option giving significant gains over oem ported. Bit of a ramble, but anyone??
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