more power ......or noise

[tuscandom]

tried this thread on the tuscan forum but not much response ,does a decat produce any more power or just more noise ??
also looking for a tuscan handbook ,4.oL 2001.cheers

[Flintstone]

Good question.

Though I've no idea what the answer is the bible does suggest that loss of power is a possibility. Reduced backpressure and all that.

I'd be keen to hear from anyone who has proof either way.

[W 4.O TUS]

Ive heard that it will give you less power and torque

[Tangoed]

I can only talk about a with knowledge of a 4.5 V8 cerbera. A small gain an loads of noise. I now have a speed six and I'm not looking for that big noise, I'm quite content with the radical shape of the sag instead. Maybe a post on the speed six forum will yealed an answer.

[V8 Kieran]

Mmm nice car pic Neil! Mag shoot or just a lucky b****

[davetherave1970]

V8 Kieran said:

Mmm nice car pic Neil! Mag shoot or just a lucky b****

http://www.candyrun.tv/  in the gallery section

[V8 Kieran]

Cool Thanks Dave

[braders]

Davetherave thats a nice looking motor you have their

[Tangoed]

Managed to go on the shoot, not the Candy run. My Wife would kill me if I did.
I've still got the baby lotion on the front, haven't washed it yet.

[HarryW]

Speak to 'alans' he is currently running a Sag but he had a Tuscan and had de-cat and CCC cans on it, afaik he felt it was slower but noiser.
Short clip here http://www.pistonheads.tv/clip336.

[nelly1]

HarryW said:

Speak to 'alans' he is currently running a Sag but he had a Tuscan and had de-cat and CCC cans on it, afaik he felt it was slower but noiser.

Mine was de-catted and CCC'd by the previous owner so I can't comment on the 'slower' part (although I've never felt short changed in that dept!!!), but I wouldn't change the noise it makes for all the tea.......

[dc53]

De-catted ours today, will tell you if i feel a loss.

(we also have CCC's)

[nelly1]

You finally finished then?

dc53 said:

Biggest pain in the arse EVER! GRRR, pissng cat's it's taken me 4 hours to get through a HALF of ONE pi$$ng cat ARGH!

[davetherave1970]

braders said:

Davetherave thats a nice looking motor you have their

Thank you kindly sir

Tangoed said:

My Wife would kill me if I did.

Mine too.

[That Daddy]

Back pressure never helps power unless its a two stroke(and theres a lot of dynamics involved there)less back pressure more power,although some can help torque.

[tuscandom]

cheers all.

[The Dodger]

Just think about it for a sec. What's the fastest thing on 4 wheels? A Dragster. Do they have cats/silencers etc? NO. That answers the Power question. But, remember these are not road cars so the exhaust 'system' needs tuning for 'driveability' (= torque) so that's why we have silencers and tailpipes.

Like That Daddy said - back pressure is only an aid in two-stroke engines. It doesn't help with 'power' at all.

So decatting etc should not decrease power, but may affect driveability.

[That Daddy]

The Dodger said:

Just think about it for a sec. What's the fastest thing on 4 wheels? A Dragster. Do they have cats/silencers etc? NO. That answers the Power question. But, remember these are not road cars so the exhaust 'system' needs tuning for 'driveability' (= torque) so that's why we have silencers and tailpipes.

Like That Daddy said - back pressure is only an aid in two-stroke engines. It doesn't help with 'power' at all.

So decatting etc should not decrease power, but may affect driveability.

Top man well saidjust waiting for someone to piss on your post now

[HarryW]

That Daddy said:

The Dodger said:

Just think about it for a sec. What's the fastest thing on 4 wheels? A Dragster. Do they have cats/silencers etc? NO. That answers the Power question. But, remember these are not road cars so the exhaust 'system' needs tuning for 'driveability' (= torque) so that's why we have silencers and tailpipes.

Like That Daddy said - back pressure is only an aid in two-stroke engines. It doesn't help with 'power' at all.

So decatting etc should not decrease power, but may affect driveability.

Top man well saidjust waiting for someone to piss on your post now

issingsmiley: Can't fault the logic, back pressure = bad, tuned exhaust encouraging high gas speed = good, remove cats sometimes = exhaust now mismatched from engine mapping & running too rich so chokes on ahigh AFR and goes slower.
Sometimes cars run fine without any further work after decatting sometimes they need remapping to suit. Some more modern high flow cats are already part of the optimised and tuned exhaust and no gains can be had by decatting. If there are proven gains to be had then fine do it, quite often it doesn't provide any benefit, so why decat.

says he, having decatted his last two cars..................