Exhaust manifolds
Discussion
Can I ask, are they regular tvr headers?
Only asking as the headers on my 4.2 range river are puny in comparison to those short primaries and drain pipe size collector!
Vapour blasting would work really quite well and remove less excess metal than mechanical/ grinding/ wire brush methods. Once cleaned as much as possible you could use electrolysis to ‘get between the tubes’ both inside and out.
Either find a company that can do so or make an electrolysis tank yourself. I made one to totally strip some front inner wings for my Range Rover classic prior to having them zinc plated and it worked a treat! Just a large plastic drum filled with water and some laundry soda, a car battery charger clipped one cable to part to be de rusted and the other to a sacrificial piece of steel dunked in the tank. Leave it for a day or two and watch the magic happen!
Only asking as the headers on my 4.2 range river are puny in comparison to those short primaries and drain pipe size collector!
Vapour blasting would work really quite well and remove less excess metal than mechanical/ grinding/ wire brush methods. Once cleaned as much as possible you could use electrolysis to ‘get between the tubes’ both inside and out.
Either find a company that can do so or make an electrolysis tank yourself. I made one to totally strip some front inner wings for my Range Rover classic prior to having them zinc plated and it worked a treat! Just a large plastic drum filled with water and some laundry soda, a car battery charger clipped one cable to part to be de rusted and the other to a sacrificial piece of steel dunked in the tank. Leave it for a day or two and watch the magic happen!
I would definately try the electrolysis method and spend the other £1150 elsewhere on the car!
When you lift them out of the tank you will need to dry and rust protect them immediately as the metal will be very open to surface rusting before before your eyes. Wipe or heat gun them dry and if nothing else spray a coat of wd40 on them until you can have them coated in whatever you prefer. Once dried I left parts sitting around for a few weeks before having them plated and they were perfect. 12 years on the inner wings I did don’t yet have a single spot of rust on them. Wish I could say the same for the rest of my car..
When you lift them out of the tank you will need to dry and rust protect them immediately as the metal will be very open to surface rusting before before your eyes. Wipe or heat gun them dry and if nothing else spray a coat of wd40 on them until you can have them coated in whatever you prefer. Once dried I left parts sitting around for a few weeks before having them plated and they were perfect. 12 years on the inner wings I did don’t yet have a single spot of rust on them. Wish I could say the same for the rest of my car..
Unlucky48 said:
I would definately try the electrolysis method and spend the other £1150 elsewhere on the car!
When you lift them out of the tank you will need to dry and rust protect them immediately as the metal will be very open to surface rusting before before your eyes. Wipe or heat gun them dry and if nothing else spray a coat of wd40 on them until you can have them coated in whatever you prefer. Once dried I left parts sitting around for a few weeks before having them plated and they were perfect. 12 years on the inner wings I did don’t yet have a single spot of rust on them. Wish I could say the same for the rest of my car..
The car above had almost 400hp so that £1200 was money well spent matey! When you lift them out of the tank you will need to dry and rust protect them immediately as the metal will be very open to surface rusting before before your eyes. Wipe or heat gun them dry and if nothing else spray a coat of wd40 on them until you can have them coated in whatever you prefer. Once dried I left parts sitting around for a few weeks before having them plated and they were perfect. 12 years on the inner wings I did don’t yet have a single spot of rust on them. Wish I could say the same for the rest of my car..
Do you have pictures of the results of your method and coating.
Classic Chim said:
Unlucky48 said:
I would definately try the electrolysis method and spend the other £1150 elsewhere on the car!
When you lift them out of the tank you will need to dry and rust protect them immediately as the metal will be very open to surface rusting before before your eyes. Wipe or heat gun them dry and if nothing else spray a coat of wd40 on them until you can have them coated in whatever you prefer. Once dried I left parts sitting around for a few weeks before having them plated and they were perfect. 12 years on the inner wings I did don’t yet have a single spot of rust on them. Wish I could say the same for the rest of my car..
The car above had almost 400hp so that £1200 was money well spent matey! When you lift them out of the tank you will need to dry and rust protect them immediately as the metal will be very open to surface rusting before before your eyes. Wipe or heat gun them dry and if nothing else spray a coat of wd40 on them until you can have them coated in whatever you prefer. Once dried I left parts sitting around for a few weeks before having them plated and they were perfect. 12 years on the inner wings I did don’t yet have a single spot of rust on them. Wish I could say the same for the rest of my car..
Do you have pictures of the results of your method and coating.
look how those longer primaries merge into the collector for starters compared to what we have 
To me it’s money well spent on the stainless manifolds even though they are expensive they look fantastic under the bonnet.
If the car means something to you and is a keeper it’s a fit and forget solution, whatever you do to the existing ones they will start to look crap after a year or two.
A nicely made system is a thing of beauty to me !
If the car means something to you and is a keeper it’s a fit and forget solution, whatever you do to the existing ones they will start to look crap after a year or two.
A nicely made system is a thing of beauty to me !
And moved the power peak up by 500 rpm.
Edited to add:
Peak power moved up the rev range which is good as the old RV8 is a bit of a plodder.
The manifolds also added about 12+ bhp
The exhaust note changed to a crisper more angry sound which I liked!
Edited to add:
Peak power moved up the rev range which is good as the old RV8 is a bit of a plodder.
The manifolds also added about 12+ bhp
The exhaust note changed to a crisper more angry sound which I liked!
Edited by phazed on Sunday 7th February 13:41
As a petrol head I would completely agree that a well made set of headers look fantastic. At least when new, maybe not so once tarnished and been in the car for a while unless you are going to brasso them regularly.
A friend of mine makes a lot of titanium bike stuff and it’s a work of art!
That said if originality and sensible spends are key then £1200 for a set of headers is a lot of money.
400bhp may well be possible from very well fettled rv8 but not by an exhaust alone! If a set of headers alone added more than 10% increase I would be amazed.
The method is very simple, I outlined it above and a quick google will tell you all you need to know, it’s not rocket science and I ain’t selling it just suggesting a cost effective rust removal method which is what was asked for.
A friend of mine makes a lot of titanium bike stuff and it’s a work of art!
That said if originality and sensible spends are key then £1200 for a set of headers is a lot of money.
400bhp may well be possible from very well fettled rv8 but not by an exhaust alone! If a set of headers alone added more than 10% increase I would be amazed.
The method is very simple, I outlined it above and a quick google will tell you all you need to know, it’s not rocket science and I ain’t selling it just suggesting a cost effective rust removal method which is what was asked for.
a lot of that goes on, unfortunately 
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