Y piece project
Discussion
Some advice please if I may...
I have a plan in mind to cut open the original TVR Y Piece, remove the CAT, and weld it back together. At the same time I want to relocate (remove and fit a new one) the boss for the wide band lambda sensor from the right hand manifold to the central section of the pipe at the base of the Y as it currently only gets readings from one bank. The lambda sensor is connected to a MS2 ECU. I know the lambda sensor has to go before the CAT, but as there will not be any assume it is ok to go at the base of the Y. Is relocating the lambda sensor worth the effort?
I have a willing helper who can help do the cutting and welding, given it is outside of my comfort zone. This is also where I need the most advice.
So, first of all is decatting the Y piece like this a good idea or not? The PreCats have already been taken out. Yes I know it is going to be noisier but the car is not exactly quiet at the moment, Whilst I would like to get an ACT of Clive decat Y price, my available budget will not stretch to that at the moment and I long list of jobs that need attention.
Secondly, how easy is the main CAT to get out?
Thirdly, what is the original Y piece made from? Is it stainless steel, does anyone know what type of stainless it is?
Finally, and this might really highlight my ignorance, I assume from a welding point of view the sensor boss needs to be the same type of metal as the Y piece. Is that correct, or can you weld stainless and mild steel together?
I am aware that this can cause issues with the MOT, and have already taken that in to account.
Thanks in advance of your help and advice.
I have a plan in mind to cut open the original TVR Y Piece, remove the CAT, and weld it back together. At the same time I want to relocate (remove and fit a new one) the boss for the wide band lambda sensor from the right hand manifold to the central section of the pipe at the base of the Y as it currently only gets readings from one bank. The lambda sensor is connected to a MS2 ECU. I know the lambda sensor has to go before the CAT, but as there will not be any assume it is ok to go at the base of the Y. Is relocating the lambda sensor worth the effort?
I have a willing helper who can help do the cutting and welding, given it is outside of my comfort zone. This is also where I need the most advice.
So, first of all is decatting the Y piece like this a good idea or not? The PreCats have already been taken out. Yes I know it is going to be noisier but the car is not exactly quiet at the moment, Whilst I would like to get an ACT of Clive decat Y price, my available budget will not stretch to that at the moment and I long list of jobs that need attention.
Secondly, how easy is the main CAT to get out?
Thirdly, what is the original Y piece made from? Is it stainless steel, does anyone know what type of stainless it is?
Finally, and this might really highlight my ignorance, I assume from a welding point of view the sensor boss needs to be the same type of metal as the Y piece. Is that correct, or can you weld stainless and mild steel together?
I am aware that this can cause issues with the MOT, and have already taken that in to account.
Thanks in advance of your help and advice.
This may not help, but it may........
I considered the same path you are thinking of taking.
After I weighed up all the pros and cons, I decided to stick with removed the pre cats from the manifold myself and just bought a clive Y Piece.
Glad I did - worked for me and the car sounds very nice
Each to his own though....
Keep us all posted on what you decide to do (and please update any work you do).
Regards
Nosh.
I considered the same path you are thinking of taking.
After I weighed up all the pros and cons, I decided to stick with removed the pre cats from the manifold myself and just bought a clive Y Piece.
Glad I did - worked for me and the car sounds very nice
Each to his own though....
Keep us all posted on what you decide to do (and please update any work you do).
Regards
Nosh.
Why not just swap he main cat for a piece of stainless steel pipe and weld it back up. There are plenty of options on eBay for diameter and length.
I don't know what grade SS the exhaust is but SS is pretty easy to weld and quite forgiving to grade mismatch as long as you have a good filler and all is clean. Make sure all carbon is removed or you will get cracking.
You can weld MS to SS if the filler is SS.
I don't know what grade SS the exhaust is but SS is pretty easy to weld and quite forgiving to grade mismatch as long as you have a good filler and all is clean. Make sure all carbon is removed or you will get cracking.
You can weld MS to SS if the filler is SS.
I have heard that the TVR Y piece, decatted, has all the harmonic subtlety of a large dustbin farting.....but I have not heard it myself.
If you want to listen to/ride in a Chim with the pre-cats removed and a Clive Y, plus standard exhaust, Jeremy, just ping me an email and we can meet up no trouble.
If you want to listen to/ride in a Chim with the pre-cats removed and a Clive Y, plus standard exhaust, Jeremy, just ping me an email and we can meet up no trouble.
QBee said:
I have heard that the TVR Y piece, decatted, has all the harmonic subtlety of a large dustbin farting.....but I have not heard it myself.
If you want to listen to/ride in a Chim with the pre-cats removed and a Clive Y, plus standard exhaust, Jeremy, just ping me an email and we can meet up no trouble.
That's what I had heard that's why I put the cone in to stop it If you want to listen to/ride in a Chim with the pre-cats removed and a Clive Y, plus standard exhaust, Jeremy, just ping me an email and we can meet up no trouble.
jojackson4 said:
QBee said:
I have heard that the TVR Y piece, decatted, has all the harmonic subtlety of a large dustbin farting.....but I have not heard it myself.
If you want to listen to/ride in a Chim with the pre-cats removed and a Clive Y, plus standard exhaust, Jeremy, just ping me an email and we can meet up no trouble.
That's what I had heard that's why I put the cone in to stop it If you want to listen to/ride in a Chim with the pre-cats removed and a Clive Y, plus standard exhaust, Jeremy, just ping me an email and we can meet up no trouble.
QBee said:
I have heard that the TVR Y piece, decatted, has all the harmonic subtlety of a large dustbin farting.....but I have not heard it myself.
If you want to listen to/ride in a Chim with the pre-cats removed and a Clive Y, plus standard exhaust, Jeremy, just ping me an email and we can meet up no trouble.
...all being well you'll get to hear mine on Friday. If you want to listen to/ride in a Chim with the pre-cats removed and a Clive Y, plus standard exhaust, Jeremy, just ping me an email and we can meet up no trouble.
No precats, no main cat, cone in the main bucket, sleeved silencers ... It's 'kin loud!
QBee said:
Bassfiend229hp said:
...all being well you'll get to hear mine on Friday.
No precats, no main cat, cone in the main bucket, sleeved silencers ... It's 'kin loud!
Sadly mine has to pass the 100 dB noise test at Castle Combe.....No precats, no main cat, cone in the main bucket, sleeved silencers ... It's 'kin loud!
Gassing Station | Chimaera | Top of Page | What's New | My Stuff