ACT Y Piece ...vs... Original Y Piece with Cat
Discussion
Hi folks,
Just purchased an ACT Y Piece that I will be fitting next weekend.
I fully appreciate the biggest change will be in exhaust volume & note, not so much a performance improvement.
However I have read a 5-10hp increase is possible from the ACT Y piece with additional improvements to throttle response, the way the engine spins up & a reduction in under bonnet temps.
To be honest this is more of a vanity purchase, ever since I heard "Tom's Dad's" pre-cat Griff I knew I would be doing something to get closer to that glorious pre-cat sound.
My Chim runs the standard silencer box, but I did remove the pre-cats last year.
So, does anyone have direct experience of the HP increases just by fitting the ATC Y Piece in place of the standard Cat one?
Thanks, Dave.
Just purchased an ACT Y Piece that I will be fitting next weekend.
I fully appreciate the biggest change will be in exhaust volume & note, not so much a performance improvement.
However I have read a 5-10hp increase is possible from the ACT Y piece with additional improvements to throttle response, the way the engine spins up & a reduction in under bonnet temps.
To be honest this is more of a vanity purchase, ever since I heard "Tom's Dad's" pre-cat Griff I knew I would be doing something to get closer to that glorious pre-cat sound.
My Chim runs the standard silencer box, but I did remove the pre-cats last year.
So, does anyone have direct experience of the HP increases just by fitting the ATC Y Piece in place of the standard Cat one?
Thanks, Dave.
Removing Pre-cats makes a difference apparantly.
Mine is ACT SuperSports exhaust (straight through), no pre-cats, ACT Y-piece.
I personally really like the sound, but it is very loud so not to everyone's taste.
The noise as the revs go through 3000 and upwards is extremely addictive though ....
Mine is ACT SuperSports exhaust (straight through), no pre-cats, ACT Y-piece.
I personally really like the sound, but it is very loud so not to everyone's taste.
The noise as the revs go through 3000 and upwards is extremely addictive though ....
, get a large tin of elbow grease man!CHIMV8 said:
Chimpafrolic said:
The ACT Y Piece went in today 
Pure pre-cat Griffith sound effects and it feels like another 10hp.
Throttle response is noticeably better too.
Happy Days
Come on Dave wheres the video....Pure pre-cat Griffith sound effects and it feels like another 10hp.
Throttle response is noticeably better too.
Happy Days
By way of compensation here is a little movie of me arriving at my mates place in Italy this summer.
http://www.youtube.com/watch?v=0at_Gn06D5c
Sorry no ACT Y piece at the time
BTW, when are you getting that car on the rollers mate? we all want to know what she makes after Rob worked his magic on it.
TV8 said:
I have just bought the ACT Cherry bomb system to go with the y-piece. Mrs B is less than thrilled about it as she thinks the existing one is too loud and a bit anti-social for the neighbours. I cant wait to get it on the car.
Good work fella, you go for it.I set may first car alarm off at the weekend.
It felt soooo goooood
I actually hate noisy cars, but a V8, well thats different
Cheers Dave. I cant wait to hear it and was gutted not to get it on in time for TiTT 7 last Sunday.
I have done a couple of things to the car since it got 240 on the RR (smooth bore and sorted an HT problem I didnt know I had until put on a krypton tuner) and it definately revs stronger at higher revs.
In an ideal world, I was hoping to get another reading before putting on the new system and then again afterwards to see what difference the different bits and pieces made. I was expecting it to be the up with things above but not sure what the ACT system would do to the power. Any thoughts on the ACT system?
I have done a couple of things to the car since it got 240 on the RR (smooth bore and sorted an HT problem I didnt know I had until put on a krypton tuner) and it definately revs stronger at higher revs.
In an ideal world, I was hoping to get another reading before putting on the new system and then again afterwards to see what difference the different bits and pieces made. I was expecting it to be the up with things above but not sure what the ACT system would do to the power. Any thoughts on the ACT system?
Chimpafrolic said:
CHIMV8 said:
Chimpafrolic said:
The ACT Y Piece went in today
Pure pre-cat Griffith sound effects and it feels like another 10hp.
Throttle response is noticeably better too.
Happy Days
Come on Dave wheres the video....Pure pre-cat Griffith sound effects and it feels like another 10hp.
Throttle response is noticeably better too.
Happy Days
By way of compensation here is a little movie of me arriving at my mates place in Italy this summer.
http://www.youtube.com/watch?v=0at_Gn06D5c
Sorry no ACT Y piece at the time
BTW, when are you getting that car on the rollers mate? we all want to know what she makes after Rob worked his magic on it.
Will defo fit in asap
Chimpafrolic said:
The ACT Y Piece went in today
Pure pre-cat Griffith sound effects and it feels like another 10hp.
Throttle response is noticeably better too.
Happy Days
Very nice.... the sound alone has got to be worth at least 10BHP Pure pre-cat Griffith sound effects and it feels like another 10hp.
Throttle response is noticeably better too.
Happy Days
Mine certainly more responsive with it on but I am not sure how much of that is all the extra noise clouding my judgement.
MPoxon said:
Chimpafrolic said:
The ACT Y Piece went in today
Pure pre-cat Griffith sound effects and it feels like another 10hp.
Throttle response is noticeably better too.
Happy Days
Very nice.... the sound alone has got to be worth at least 10BHP Pure pre-cat Griffith sound effects and it feels like another 10hp.
Throttle response is noticeably better too.
Happy Days
Mine certainly more responsive with it on but I am not sure how much of that is all the extra noise clouding my judgement.
Whatever the power improvements are is almost academic, its the way the car feels, and makes you feel when driving it.
I measure my car in smiles not horsepower, & the ACT Y piece makes me grin like a fool
Chimpafrolic said:
I measure my car in smiles not horsepower, & the ACT Y piece makes me grin like a fool
same here. The decat Y just makes the already large TVR silly grin even bigger when you boot it. Like you say you do tend drive the car differently any opportunity to get the hammer down and hear the glorious sound.In fact here is a very small clip of my drive home today. A very congested and slow moving Dartford tunnel at 16:30 today but still managed to get a tiny bit of acceleration
http://youtu.be/CjzUqDfm-YM?hd=1
I seem to use a lot more fuel now
MPoxon said:
same here. The decat Y just makes the already large TVR silly grin even bigger when you boot it. Like you say you do tend drive the car differently any opportunity to get the hammer down and hear the glorious sound.In fact here is a very small clip of my drive home today. A very congested and slow moving Dartford tunnel at 16:30 today but still managed to get a tiny bit of acceleration
http://youtu.be/CjzUqDfm-YM?hd=1
I seem to use a lot more fuel now
And for that I salute you sir
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