Flowed OEM headers versus aftermarket ?
#1
Flowed OEM headers versus aftermarket ?
I have flowed original headers at the moment, but paranoia is taking over again and i think I might have a leaking centre joining pipe.
I know some aftermarket tubular header are much larger in volume which doesn't help torque lower in rev range.
Does anyone have a experiance of how this single component helps / hinders power / torque?
I have a 97UK car with hybrid TD04 + supporting mods. It's 99% road use.
Thanks
I know some aftermarket tubular header are much larger in volume which doesn't help torque lower in rev range.
Does anyone have a experiance of how this single component helps / hinders power / torque?
I have a 97UK car with hybrid TD04 + supporting mods. It's 99% road use.
Thanks
#3
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Depending on length/diameter of course, but yes, most AM tubular headers do as 500 says, ported headers with only a small diameter and volume increase have little effect on spool (maybe small positive effect) but reduce some of the higher end deficit to the tubulars.
Simon
Simon
#4
Thanks guys.
Pretty much as I thought, although I remember seeing some AM headers advertised with low volume as a feature to help torque.
Just wondering if anyone had a before / after comparison.
To be honest I haven't the funds or time to swap at the moment, so it's a bit accademic until I really need to do something.
Thanks though
Pretty much as I thought, although I remember seeing some AM headers advertised with low volume as a feature to help torque.
Just wondering if anyone had a before / after comparison.
To be honest I haven't the funds or time to swap at the moment, so it's a bit accademic until I really need to do something.
Thanks though
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Why do you think your centre pipe is leaking clint ? I ask as I have the same suspicions - when they went on there was more 'flex' than I thought right....
Steve
Steve
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#9
My suspicion is down to noise - I can't pin point it - it's not that obvious but occasionally I think there's a leak from somewhere at the front and the link pipe is pretty flimzy.
I was porting some OEM headers (my original ones actually) and the link pipe just broke, it was pretty corroded so it didn't surprize me.
It might be because i don't stand outside the car with the engine running much and I have been recently, as I said paranoia kicking in again. I'd thought I'd finished so it's probably the 'mod bug' kicking in subconsiously
Interesting to hear your result Lunar trick - cheers.
I was porting some OEM headers (my original ones actually) and the link pipe just broke, it was pretty corroded so it didn't surprize me.
It might be because i don't stand outside the car with the engine running much and I have been recently, as I said paranoia kicking in again. I'd thought I'd finished so it's probably the 'mod bug' kicking in subconsiously
Interesting to hear your result Lunar trick - cheers.
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