I want a Le Mans Corvette sounding exhaust !
Discussion
I see the light ! what system does the Range Rover run, 2 pipes ?
so to go back to the original post,does the original TVR exhaust system need to be changed to a 2 pipe system firstly before removing cats and silencers to get the "Le Mans Corvette sounding exhaust" ?
so to go back to the original post,does the original TVR exhaust system need to be changed to a 2 pipe system firstly before removing cats and silencers to get the "Le Mans Corvette sounding exhaust" ?
Edited by dhf on Friday 13th February 12:28
Its not that loud 
dhf said:
so to go back to the original post,does the original TVR exhaust system need to be changed to a 2 pipe system firstly before removing cats and silencers to get the "Le Mans Corvette sounding exhaust" ?
Here's a clip of a RV8 engine on a trolley with just the manifolds and therefore no balance pipe mechanism - I guess this is the sound you're after right?http://www.youtube.com/watch?v=zRk4MdzGlko
I do love the sound but not sure I'd want to sacrifice any horses for it and I believe the TVR system is fairly well designed in principal.
dumbfunk
Right then , I am getting somewhere now.
Spoke first to a friendly MOT man yesterday
. he said that the car may pass without the cats. Depends on the car engine quality. He also said if it was way out then I would have to put the old catted Y piece back in 
, but if its close ( what ever that is) he can “help” it pass the test.
So that’s a result!. He has even offered me the chance to put it on the emissions tester once I have done the work just to see where I am , as it only passed a MOT 2 months ago.
Then I rang a very helpful guy at ACT ( didn’t get his name) and had a long and informative chat about my current exhaust system and what to do about it.
His advice on the matter was to leave my main exhaust system alone as I already have the cherry bombs in my silencer . Wich he said makes it almost the same as the ACT sports exhaust. Leave the ECU alone for the time being . “ if the car is running fine then don’t mess with it” kind of thing.
Fit the new ACT Y piece removing the main cat
( which is the main noise muffler) , then remove the pre-cats if it’s easy enough to do so. ( some times they fall out, sometimes they are a b
d to remove without taking of the manifold which can open up another host of problems.
One thing he did say of interest was “if you do take the pre-cats out , don’t leave any debris of the pre-cats lying around in the manifold shove a hoover up the pipes if you have too but the exhaust doesn’t just blow the st out . It can breath some back in !.”
So I now have a shiny new Y piece in the post ( 2 weeks) and I will post back with the results when I have completed the job. Thanks for all the help !
1 more question ! should I take the bonnet off for easy access?
Spoke first to a friendly MOT man yesterday
. he said that the car may pass without the cats. Depends on the car engine quality. He also said if it was way out then I would have to put the old catted Y piece back in , but if its close ( what ever that is) he can “help” it pass the test.So that’s a result!. He has even offered me the chance to put it on the emissions tester once I have done the work just to see where I am , as it only passed a MOT 2 months ago.
Then I rang a very helpful guy at ACT ( didn’t get his name) and had a long and informative chat about my current exhaust system and what to do about it.
His advice on the matter was to leave my main exhaust system alone as I already have the cherry bombs in my silencer . Wich he said makes it almost the same as the ACT sports exhaust. Leave the ECU alone for the time being . “ if the car is running fine then don’t mess with it” kind of thing.
Fit the new ACT Y piece removing the main cat
( which is the main noise muffler) , then remove the pre-cats if it’s easy enough to do so. ( some times they fall out, sometimes they are a bd to remove without taking of the manifold which can open up another host of problems.One thing he did say of interest was “if you do take the pre-cats out , don’t leave any debris of the pre-cats lying around in the manifold shove a hoover up the pipes if you have too but the exhaust doesn’t just blow the s
t out . It can breath some back in !.”So I now have a shiny new Y piece in the post ( 2 weeks) and I will post back with the results when I have completed the job. Thanks for all the help !
1 more question ! should I take the bonnet off for easy access?
dumbfunk said:
That's what mine sounded like when i fired it up with the y piece removed 
I've not used my decatted dustbin very much, its just too effin noisy!! I put down other people tolerating it to different engine characteristics or just plain deaf?
You don't need to remove the bonnet, but you just might have to drop the exhaust' so you can ease it back. Certainly need to on the early ones ~ but the serps & clamps maybe different?
You don't need to remove the bonnet, but you just might have to drop the exhaust' so you can ease it back. Certainly need to on the early ones ~ but the serps & clamps maybe different?
showcase said:
verysideways , did you take out the main cat whan you removed your Y piece ? i was told that it was the main noise restriction.
No, i left my main cat in place in the Y-piece.Just washed the car and took it up the road to blow dry the crevices, and just to re-confirm: taking the precats out makes a BIG difference to the breathing. My precats were "intact", they didn't appear to be blocked or damaged, but clearly they were strangling the engine because it drives so much nicer now. It's much cleaner through the mid range and it sails past 5k rpm (which it never used to before).
As i said i have the ACT sports exhaust already and removing the precats doesn't seem to have changed the noise (it already sounded great and it still does!).
Sorry for the long wait! , i have been to egypt
and stuff so only managed to do the work this week.
Started sunday , little monday and a couple of hours tonight.
The beast is back in the garage now fully de-catted, pre and main with the new ACT replacment y-piece.
As you may have all read , removing the pre-cats was the worst job i have done in a long time. it was a of a job. I used many tools but long masonary drill and v long screw drivers ripped it apart in the end.
( average 3h each i would guess). Had to remove the hole exhaust system to get the new Y-piece in including the rear ARB.
I havent taken it to my MOT guy yet for the emmissons cheak yet.(doing that saturday hopfully). Anyway i fired it up and it sounds bloody fantastic !
, just what i was looking for.
loud,deep,burbling,grunting.....and that was just on the drive.I would have taken it for a spin but for the fact i have the bonnet in my dinning room still.
(I will use this as a oppertunity to clean the bits of body and engine bay that dont normaly get cleaned!). I will then drive it at the weekend and report back.
so far so good!
and stuff so only managed to do the work this week.Started sunday , little monday and a couple of hours tonight.
The beast is back in the garage now fully de-catted, pre and main with the new ACT replacment y-piece.
As you may have all read , removing the pre-cats was the worst job i have done in a long time. it was a
of a job. I used many tools but long masonary drill and v long screw drivers ripped it apart in the end.( average 3h each i would guess). Had to remove the hole exhaust system to get the new Y-piece in including the rear ARB.I havent taken it to my MOT guy yet for the emmissons cheak yet.(doing that saturday hopfully). Anyway i fired it up and it sounds bloody fantastic !
, just what i was looking for.loud,deep,burbling,grunting.....and that was just on the drive.I would have taken it for a spin but for the fact i have the bonnet in my dinning room still.
(I will use this as a oppertunity to clean the bits of body and engine bay that dont normaly get cleaned!). I will then drive it at the weekend and report back.
so far so good!
Mad Mitch said:
On the yank V8`s each bank of 4 cylinders has its own exhaust. On TVR all eight run into one pipe then split into two at rear. The uneven pulseing of the yanks is down to the seperate exhausts. They sound fantastic but interestingly one of the performance upgrades is to fit an "X" pipe to blend the flow of the gases from each bank. The theory being that when onev bank fires the gases passing across the "X" pipe cause a suction drawing the pulse from the other bank and therefore speeding up exhaust gass expulsion.
Yank V8s like a balance pipe,well road going motors do 
showcase said:
Sorry for the long wait! , i have been to egypt and stuff so only managed to do the work this week.
Started sunday , little monday and a couple of hours tonight.
The beast is back in the garage now fully de-catted, pre and main with the new ACT replacment y-piece.
As you may have all read , removing the pre-cats was the worst job i have done in a long time. it was a of a job. I used many tools but long masonary drill and v long screw drivers ripped it apart in the end.( average 3h each i would guess). Had to remove the hole exhaust system to get the new Y-piece in including the rear ARB.
I havent taken it to my MOT guy yet for the emmissons cheak yet.(doing that saturday hopfully). Anyway i fired it up and it sounds bloody fantastic !, just what i was looking for.
loud,deep,burbling,grunting.....and that was just on the drive.I would have taken it for a spin but for the fact i have the bonnet in my dinning room still.
(I will use this as a oppertunity to clean the bits of body and engine bay that dont normaly get cleaned!). I will then drive it at the weekend and report back.
so far so good!
So hows it been,taking pre-cats out next month interested in the ACT Y piece option any fitted pics. and stuff so only managed to do the work this week.Started sunday , little monday and a couple of hours tonight.
The beast is back in the garage now fully de-catted, pre and main with the new ACT replacment y-piece.
As you may have all read , removing the pre-cats was the worst job i have done in a long time. it was a
of a job. I used many tools but long masonary drill and v long screw drivers ripped it apart in the end.( average 3h each i would guess). Had to remove the hole exhaust system to get the new Y-piece in including the rear ARB.I havent taken it to my MOT guy yet for the emmissons cheak yet.(doing that saturday hopfully). Anyway i fired it up and it sounds bloody fantastic !
, just what i was looking for.loud,deep,burbling,grunting.....and that was just on the drive.I would have taken it for a spin but for the fact i have the bonnet in my dinning room still.
(I will use this as a oppertunity to clean the bits of body and engine bay that dont normaly get cleaned!). I will then drive it at the weekend and report back.
so far so good!
You have problems with MOT emissions??
Edited by Golflion on Saturday 17th October 12:14
Have any of you who have gone down the full decat route also got a sleaved exchaust?
I keep being tempted to go for a decat Y piece, I don't mind it being loud! I currently have the precats removed and a sleaved exhaust, but original cat Y piece still in place. It sounds great, pops and bangs loads, but is just a tad on the quiet side when out on runs with some of the decat SP6 boys (who drown me out!). Wouldn't want to loose the pops and bangs though.
Arran
I keep being tempted to go for a decat Y piece, I don't mind it being loud! I currently have the precats removed and a sleaved exhaust, but original cat Y piece still in place. It sounds great, pops and bangs loads, but is just a tad on the quiet side when out on runs with some of the decat SP6 boys (who drown me out!). Wouldn't want to loose the pops and bangs though.
Arran
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