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.
Just to close this thread off.
Got a Clive Y Piece from Barrie. Many thanks.
A local TVR owner, Alan641, popped over today and helped me remove the nearside manifold (gaskets needed changing) and replace the old standard Y piece for the new one. Getting the old Y piece out was more of a struggle than getting the manifold off which was a welcome turn of events given the bad experience some have had with the manifold bolts. Job done in about 4 hours, including a bacon sandwich break. Thanks Alan for your help.
Sound is pretty impressive compared to the original.
Got a Clive Y Piece from Barrie. Many thanks.
A local TVR owner, Alan641, popped over today and helped me remove the nearside manifold (gaskets needed changing) and replace the old standard Y piece for the new one. Getting the old Y piece out was more of a struggle than getting the manifold off which was a welcome turn of events given the bad experience some have had with the manifold bolts. Job done in about 4 hours, including a bacon sandwich break. Thanks Alan for your help.
Sound is pretty impressive compared to the original.
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