Another Fuse 22 thread !

[GT2man-2]

Am I right in saying that removing Fuse 22 reduces backpressure at low revs and in doing so reduces torque.. so it's a case of trading performance for a nicer sound ?

[bogie]

no - its purely a device to get the car through noise regs

[UH-Matt]

Performance is not involved, its purely to make a nicer noise (exhaust valve).

[GT2man-2]

Now I'm confused.

I've googled it and have seen various posts like

"The only downside to uncorking the exhaust is that you lose ~10 lb/ft of torque below 4,000 rpm (on the V8)."

"Actually there is a torque LOSS by pulling the fuse"

[steve_amv8]

GT2man-2 said:

Now I'm confused.

I've googled it and have seen various posts like

"The only downside to uncorking the exhaust is that you lose ~10 lb/ft of torque below 4,000 rpm (on the V8)."

"Actually there is a torque LOSS by pulling the fuse"

I can't say I have noticed any difference on either my previous or current cars.

[XXXAngelXXX]

engine newbie discussion......

[GT2man-2]

I'm sorry XXANGELXX, if you could point me to the thread on this forum where Fuse22 and it's effect on torque has been discussed I'd be very grateful. I couldn't find it.

[timhum]

GT2man-2

I've had switch fitted to both my 4.3l and 4.7l AMV8s in order to be able to select normal exhaust sound or loud as required. I have heard that there is possibly a slight torque loss with the exhaust on 'loud' but in my opinion it is not at all discernable. The switch is a modification that can be carried out by any AM Dealer at a cost of (choke, choke) around £300.00.

Tim

[GT2man-2]

Ah, that's useful to know, I had been quoted £500 for Works Service to do it.
That said, I think I could fabricate a remote control one myself.

I was more interested from an engineering/mechanical point of view.

[GT2man-2]

Something like this would do it

http://www.jab-tech.com/Remote-control-12v-DC-rela...



Cheap as chips and jobs a goodun.

[MADT350]

well i'm sure my car feels more responsive at lower revs with fuse 22 removed ......?

[Terminator]

GT2man-2 said:

I had been quoted £500 for Works Service to do it.

I'm sure I was charged £180 + vat when I had mine fitted by Works Service last April. Newport Pagnell's inflation rate must be the same as Zimbabwe's.

Anyhow, I don't notice any loss of torque or power, just an increase in the number of admiring glances.

[rick-dms-]

i have been looking through the specs and can not find anything about torque loss when removing fuse 22, secondly fitting a sports exhaust, which do not have the flaps at all, further reduces back pressure, but all the specs graphs from such as larini and quicksilver etc show a torque increase even at low revs, gt where did you get the specs you are referring too, just curious as obviously conflicting reports, i can't say when roadtesting that i have noticed a difference either way, except for that great noise at lower revs,

[AMD1]

With fuse 22 removed, I notice a lot of talk loss in the car......

[Del 203]

Terminator said:

Anyhow, I don't notice any loss of torque or power

Really? I thought you would use this as an excuse for your lack of pace

[Terminator]

Del 203 said:

Terminator said:

Anyhow, I don't notice any loss of torque or power

Really? I thought you would use this as an excuse for your lack of pace

At my age, young Derek, I need no excuses, thanks.

[Del 203]

Terminator said:

Del 203 said:

Terminator said:

Anyhow, I don't notice any loss of torque or power

Really? I thought you would use this as an excuse for your lack of pace

At my age, young Derek, I need no excuses, thanks.

Actually, thinking about it, have you checked WS actually connected the switch

[Terminator]

Terminator said:

Anyhow, I don't notice any loss of torque or power, just an increase in the number of envious glances from owners of silver TVRs.

[David W.]

GT2man-2 said:

Something like this would do it

http://www.jab-tech.com/Remote-control-12v-DC-rela...



Cheap as chips and jobs a goodun.

Wow what a fantastic gadget, not sure what to use it for yet but may get one just to have ready!
DW

[GT2man-2]

David W. said:

Wow what a fantastic gadget, not sure what to use it for yet but may get one just to have ready!
DW

It's a remote control 12v powered relay switch, meaning you can put it inline with your Fuse 22 and use the remote fob to effectively "pull fuse" whenever you want without having to run a wire from the boot to your dash. And it's about £10, so if you're handy with some wirecutters you could do the job in no time yourself. (That particular item may not handle the ampage but you could get one that does)

Edited by GT2man-2 on Wednesday 18th March 09:38