V12 Vantage upgrade...again!
V12 Vantage upgrade...again!
Author
Discussion

SAG6Y

Original Poster:

389 posts

219 months

Friday 1st May 2015
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So I'm currently enjoying my v12v and love the secondary cat delete. I've still found it a little on the quiet side. I was at BR last week and I've decided to get the primary cat delete done as well. He had v12v there with the primary cat deleted and it sounded awesome. Mine will be louder as the secondary cat is out too. It will also give a heathy 30 BHP improvement. Has anyone done this mod? Am I nuts or will it be too loud? Mike thinks it will be loud but will still have the baritone Aston burble. Any thoughts welcome.

downr

3,807 posts

158 months

Friday 1st May 2015
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surely the worst that can happen is that you don't like it after 6 months and reverse one of the cat removals? Or is that not so easy to do?

SAG6Y

Original Poster:

389 posts

219 months

Friday 1st May 2015
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Yup. Reversal is quite a simple process. It's quite an expensive process so it'd be nice not to have to reverse it.

AdamV12V

5,314 posts

207 months

Friday 1st May 2015
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...but necessary every 12mths once the car is old enough for an MOT!

SAG6Y

Original Poster:

389 posts

219 months

Friday 1st May 2015
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I have a friendly MOT guy!

jonby

5,367 posts

187 months

Friday 1st May 2015
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SAG6Y said:
So I'm currently enjoying my v12v and love the secondary cat delete. I've still found it a little on the quiet side. I was at BR last week and I've decided to get the primary cat delete done as well. He had v12v there with the primary cat deleted and it sounded awesome. Mine will be louder as the secondary cat is out too. It will also give a heathy 30 BHP improvement. Has anyone done this mod? Am I nuts or will it be too loud? Mike thinks it will be loud but will still have the baritone Aston burble. Any thoughts welcome.
If I understand correctly, you're not having the replacement manifolds, just having all the cats out ?

Presumably whilst there;s still a lot of labour, it's a lot cheaper than having the manifolds out, which normally would be combined with the rear cats being replaced with sports cats not straight through pipes

I wonder what the power difference is between a car with no cats at all but standard manifolds and a car with the new manifolds, no header cats but sports cats at the rear. I imagine less than 20bhp difference ? But a saving of a good few thousand pounds ...potential food for thought

Will there be a fault code present as I understand normally when the header cats are removed, the sensor is moved to the rear cats to stop a fault showing

AdamV12V

5,314 posts

207 months

Saturday 2nd May 2015
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SAG6Y said:
I have a friendly MOT guy!
Hmmm, I think in the event of an accident you will find that makes your car illegally MOT'd and when the insurers find out you will be then be uninsured! Be careful!

AMDBSTony

1,130 posts

197 months

Saturday 2nd May 2015
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AdamV12V said:
SAG6Y said:
I have a friendly MOT guy!
Hmmm, I think in the event of an accident you will find that makes your car illegally MOT'd and when the insurers find out you will be then be uninsured! Be careful!
That kind of makes any cars that have had their cats removed uninsured?

Surely this cannot be right as if it was the case, the owners must have a right to sue the garages that would be deemed to have knowingly carried out work that makes the cars illegal.

Tricky area......

AdamV12V

5,314 posts

207 months

Saturday 2nd May 2015
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No, its only if they are old enough to need an MOT and new enough for the laws about not reducing the quantity of cats fitted by the factory to apply to a vehicle.

All insurers insist that your car is legal, and getting a dodgy MOT means it isnt.

We may or may not like the MOT rules and we may or may not like the laws, but driving a potentially uninsured vehicle is a bad idea IMHO...

Edited by AdamV12V on Saturday 2nd May 12:48

BamfordMike

1,192 posts

187 months

Saturday 2nd May 2015
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AdamV12V said:
driving a potentially uninsured vehicle is a bad idea IMHO...

Edited by AdamV12V on Saturday 2nd May 12:48
perhaps, but.... the many insurance claims i have managed, assessors check stuff like service records, mileage if restrictions apply and the claim is actually for the car the policy is being claimed against - in other words simple validity because any further detective work is practically beyond them. For example if an inlet cam is 1mm bigger lift or displacement (liner diameter or stroke) 2mm bigger, how the heck is that checked? Dont forget that time is money so anything other than basic checks is all that is practical, and if an assessor holds up a claim whilst checking (a garages absolute dream scenario) the garage will likely apply the industry std £55 day storage charge to the claim. From the outside you might have paranoia, but on the inside the process works to a different beat.

if the car has mot, perhaps owner declared 'sports exhaust' if it has one fitted, that's about as deep as it can go. If the V12 is supposed to have 6 cats, who's is to say a sports exhaust doesn't have them in cascade? Especially so when outside of exhaust looks same as it ever did. This sort of cheat doesn't get picked up by raceday eligibility checks by SRO, so you think an insurance assessor will? There are no such things as dodgy mot's - it either passes to satisfaction of tester and has mot, or does not. You think an assessor holds up an mot and says to himself, do you know what, i think that's dodgy and in going to inspect further??

can you offer a few examples of a claim, say crash, flood, stolen and how you think the process of assessors work to validate a claim? Because in reality the detective work to the fine toothcomb level you intimate isn't how the system works in reality fir reasons given

AdamV12V

5,314 posts

207 months

Saturday 2nd May 2015
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BamfordMike said:
can you offer a few examples of a claim, say crash, flood, stolen and how you think the process of assessors work to validate a claim? Because in reality the detective work to the fine toothcomb level you intimate isn't how the system works in reality fir reasons given
I accept what you say Mike that most of the time the detective work isn't likely to goto the fine toothcomb level as you suggest. I have no direct examples to offer, but I used to work at a top 20 law firm who represented some of the UKs largest well know insurance companies and trust me, when the claims are big they put a lot of cost and effort into avoiding paying out and/or mitigating their losses. So lets imagine a situation where perhaps you are involved in a very unfortunate accident where say a family and their children are all killed in the other vehicle, and the other side have reason to raise questions over perhaps an aspect of the roadworthness of your vehicle. The potential damages claim may runs to hundreds of thousands or millions - at which point they are going to do everything they can to find a loophole to get out of paying, and if you have a dodgy MOT it quite possible they would sniff it out.

I have no issues with cat removal to make the car sound better, indeed I would love to have mine done too - but I wouldn't do it and then run a dodgy MOT, and I suspect the cost of removal/refitting every 12mth would just make me feel it wasn't worth the cost and hassle.

Cockernee

3,059 posts

190 months

Sunday 3rd May 2015
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To be honest I had the manifolds and 200 cell cats and it was ear bleeding loud. I had resonators added and it was perfect.

Look up the Lance story on here and that will give you information on the increase on manifolds and the cams that you need to get the full 60bhp wink