Equal Length Headers Anyone?
Discussion
clive f said:
art with a purpose, will be dyno testing soon and expecting between 15 to 25 bhp over standard manifolds hopefully.
Very nice work. Have you thought of doing turbo manifolds?
At the moment, they all seem to be an adaptation of the large flange from manifolds to y-piece.
I'm assuming keeping the pipework small all the way to the turbo input would result in the turbo spinning up faster and creating less lag?
Mr Supercharged said:
I wonder how the under bonnet temperatures will fair with all that extra exhaust tubing surface area able to radiate heat?
I was thinking this too. I suppose you could ceramic coat, or Inconel. But it would take away it's aesthetic appeal somewhat. Mind you, some coated headers do look quite nice.caduceus said:
Mr Supercharged said:
I wonder how the under bonnet temperatures will fair with all that extra exhaust tubing surface area able to radiate heat?
I was thinking this too. I suppose you could ceramic coat, or Inconel. But it would take away it's aesthetic appeal somewhat. Mind you, some coated headers do look quite nice.
so maybe bike itb´s first who knows 
roseytvr said:
Excuse my ignorance but why would there be more heat - surely the engine develops the heat not the exhaust therefore no additional heat generated?
What would happen if you put 3 radiators in a living room, instead of 1? The boiler may produce the heat.... That's one analogy.to answer a few questions, heat wise, when we were carrying out back to back dyno testing of the equal length tuned system I did about 7 years ago we found that as you are dealing with single pipes the whole system cooled down a lot quicker, the standard manifolds on the other hand took a while to cool down before you could handle them, so I think the heat would be slightly less than the standard system to be honest considering individual pipes having the heat of 1 cylinder rather than one big pipe containing all four.A turbo or supercharger will be putting a lot more heat into the exhaust system than a naturally aspirated set up.
price , well I haven't gone public yet with a price on these yet and there isn't much point until I can prove what gains are given on the dyno, if I put a price up now you`d all be asking how much bang for your buck you are getting, so you`ll have to be patient
the equal length headers I did 7 years ago(pic below) were priced at £2700 a set, ok not cheap,but gave a return of an extra 25 - 28bhp over standard, but believe me a lot of work goes into making stuff like this, for example the materials costs in stainless alone with all the flanges, pipes etc was circa £500, and if I were to charge the £50 to £70 per hour that people quite happily pay to have their tvr serviced then these would be priced in the region of £8k to £9k
I`ve had quite a few serious enquiries about this system over the years, and this is why I `ve now come up with a simpler equal length system, there are now only 2 secondary pipes instead of the original 4,2,1 layout, so simpler will mean cheaper, and I am still expecting an increase between 15 to 25bhp, we will have to wait and see.
Turbo`s, yes no problem, my direct replacement for the standard manifolds could be altered for this, the headers merge into a 3" pipe then increase to the 4" to mate with the flange to the y piece, take away the 3-4" increase and just join the 3" to the 3" pipe used on the turbo y piece using a v band clamp and flanges, I`ve made turbo y pieces for tvr Power so its not anything new to me.
price , well I haven't gone public yet with a price on these yet and there isn't much point until I can prove what gains are given on the dyno, if I put a price up now you`d all be asking how much bang for your buck you are getting, so you`ll have to be patient
the equal length headers I did 7 years ago(pic below) were priced at £2700 a set, ok not cheap,but gave a return of an extra 25 - 28bhp over standard, but believe me a lot of work goes into making stuff like this, for example the materials costs in stainless alone with all the flanges, pipes etc was circa £500, and if I were to charge the £50 to £70 per hour that people quite happily pay to have their tvr serviced then these would be priced in the region of £8k to £9k
I`ve had quite a few serious enquiries about this system over the years, and this is why I `ve now come up with a simpler equal length system, there are now only 2 secondary pipes instead of the original 4,2,1 layout, so simpler will mean cheaper, and I am still expecting an increase between 15 to 25bhp, we will have to wait and see.
Turbo`s, yes no problem, my direct replacement for the standard manifolds could be altered for this, the headers merge into a 3" pipe then increase to the 4" to mate with the flange to the y piece, take away the 3-4" increase and just join the 3" to the 3" pipe used on the turbo y piece using a v band clamp and flanges, I`ve made turbo y pieces for tvr Power so its not anything new to me.
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