Cats are gone.......
Discussion
Well after following Del to the Essex Jan meet I booked my Griff into Taylor TVR (Dan and Colin) to have the pre cats removed and fit a de-cat Y piece.
So here is some info for those that are thinking about doing the same.
Noise level at idle measured at 45 degrees and 500mm away: -
Before 96 dB
After 103 dB
Temperatures using IR thermometer: -
Before
NS pre cat area = 280c
OS pre cat area = 290c
Main cat area = 195c
After
NS pre cat area = 240c
OS pre cat area = 220c
Main cat area = 90c
Main cat area temperature is down by a long way!!!!
I’ve put a video on youtube showing before and after although the after is a little too loud for the microphone to cope with, it distorts
Link http://www.youtube.com/watch?v=N-IWH4h39fU
So here is some info for those that are thinking about doing the same.
Noise level at idle measured at 45 degrees and 500mm away: -
Before 96 dB
After 103 dB
Temperatures using IR thermometer: -
Before
NS pre cat area = 280c
OS pre cat area = 290c
Main cat area = 195c
After
NS pre cat area = 240c
OS pre cat area = 220c
Main cat area = 90c
Main cat area temperature is down by a long way!!!!
I’ve put a video on youtube showing before and after although the after is a little too loud for the microphone to cope with, it distorts
Link http://www.youtube.com/watch?v=N-IWH4h39fU
good imformative bit of film that Dave, should give a few people an insight into decatting
needs to be a little crisper though, like this
http://tinypic.com/player.php?v=14nhcea&s=3
needs to be a little crisper though, like this
http://tinypic.com/player.php?v=14nhcea&s=3
Well I've been out for a "proper" drive now and you know how the louder the engine the faster you feel you're moving???
Well I'm sure I have more torque now.
I'm gonna have to get it on a power run!
When Dan (Taylor TVR) removed the pre cats he did tell me the NS had shot forward putting a hole in the lambda sensor. It was blocking the flow also.
I didn't think I'd notice the return of the lost power but
I must have been missing some horses for a while!
Day off tomorrow so more
Well I'm sure I have more torque now.
I'm gonna have to get it on a power run!
When Dan (Taylor TVR) removed the pre cats he did tell me the NS had shot forward putting a hole in the lambda sensor. It was blocking the flow also.
I didn't think I'd notice the return of the lost power but
I must have been missing some horses for a while!Day off tomorrow so more
Edited by davetherave1970 on Thursday 12th February 15:36
davetherave1970 said:
Well I've been out for a "proper" drive now and you know how the louder the engine the faster you feel you're moving???
Well I'm sure I have more torque now.
I'm gonna have to get it on a power run!
When Dan (Taylor TVR) removed the pre cats he did tell me the NS had shot forward putting a hole in the lambda sensor. It was blocking the flow also.
I didn't think I'd notice the return of the lost power but I must have been missing some horses for a while!
Day off tomorrow so more
Thats exactly what happened to one of my pre/cats,i did notice though purely because one bank of cylinders had gone on to limp mode due to the Lambda tip being torn off and it no longer giving feedback to the ECU Well I'm sure I have more torque now.
I'm gonna have to get it on a power run!
When Dan (Taylor TVR) removed the pre cats he did tell me the NS had shot forward putting a hole in the lambda sensor. It was blocking the flow also.
I didn't think I'd notice the return of the lost power but
I must have been missing some horses for a while!Day off tomorrow so more
Edited by davetherave1970 on Thursday 12th February 15:36
low speed cruising was awful 
bet your car sounds sweet now davetherave1970 said:
Nice Vid. What camera mount are you using? The picture was very still, but the dash moved up and down...I Had a hugely entertaining drive the other day chasing friends in a Lotus Exige and Lotus Europa round the country lanes. Love the slippy roads
davetherave1970 said:
davetherave1970 said:
Well after following Del to the Essex Jan meet I booked my Griff into Taylor TVR (Dan and Colin) to have the pre cats removed and fit a de-cat Y piece.
So here is some info for those that are thinking about doing the same.
Noise level at idle measured at 45 degrees and 500mm away: -
Before 96 dB
After 103 dB
Temperatures using IR thermometer: -
Before
NS pre cat area = 280c
OS pre cat area = 290c
Main cat area = 195c
After
NS pre cat area = 240c
OS pre cat area = 220c
Main cat area = 90c
Main cat area temperature is down by a long way!!!!
I’ve put a video on youtube showing before and after although the after is a little too loud for the microphone to cope with, it distorts
Link http://www.youtube.com/watch?v=N-IWH4h39fU
Just wanted to say what a Superb comparative video that is Dave So here is some info for those that are thinking about doing the same.
Noise level at idle measured at 45 degrees and 500mm away: -
Before 96 dB
After 103 dB
Temperatures using IR thermometer: -
Before
NS pre cat area = 280c
OS pre cat area = 290c
Main cat area = 195c
After
NS pre cat area = 240c
OS pre cat area = 220c
Main cat area = 90c
Main cat area temperature is down by a long way!!!!
I’ve put a video on youtube showing before and after although the after is a little too loud for the microphone to cope with, it distorts
Link http://www.youtube.com/watch?v=N-IWH4h39fU
Well Done Mate
Chimjunkie said:
What camera mount are you using? The picture was very still, but the dash moved up and down...
Home made 
Two bits of wood bolted together between both head rest posts.
The seats flex which moves the camera
Pasco said:
Just wanted to say what a Superb comparative video that is Dave
Well Done Mate
Well Done Mate
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