Hi Fellas.
My exhaust manifold is cracked. It has been cracked for about five years with little change, but now seems to be getting worse.
My muffler also has a loose baffle. Its probably time for a new exhaust system.
I was thinking of buying a set of extractors from ebay. New $175 . They have a 2inch outlet , quite a bit bigger than the standard system.
Is this a good idea for my car, or would I be better off getting another manifold and standard system.
Also, is there a fire risk from a sporty exhaust system? (risk of starting a bush fire I mean)
Regards, Wayne.
extractors
Moderator: Committee
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jonfromhamilton
- Posts: 1238
- Joined: Sun 29 Jan, 2012 8:23 pm
Re: extractors
considering you can get second hand sierra manifolds I think you should do that and stick with your standard stuff
muflers themselves are pretty cheap you could just rpelace that.
I spent between 4 and 5 hundred doing my whole exhaust including extractors off ebay (althought they were 200)
so ask yourself this, is it worth 300 bucks to have a tiny bit more performance ?
muflers themselves are pretty cheap you could just rpelace that.
I spent between 4 and 5 hundred doing my whole exhaust including extractors off ebay (althought they were 200)
so ask yourself this, is it worth 300 bucks to have a tiny bit more performance ?
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christover1
- Financial Member
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- Joined: Thu 09 Aug, 2007 5:18 pm
- Location: Croydon Victoria Australia
- Contact:
Re: extractors
I have always found extractors to be more reliable than manifolds on my cars.
Have broken a few manifolds and broken exhaust ends off where the bolt to manifold.
Have only split one set of extractors, but the were seem welded.
Power increase isn't fantastic, but I have always been happier with extractors.
My exhaust shop told me not to go too big on pipes, as you lose power.
Have broken a few manifolds and broken exhaust ends off where the bolt to manifold.
Have only split one set of extractors, but the were seem welded.
Power increase isn't fantastic, but I have always been happier with extractors.
My exhaust shop told me not to go too big on pipes, as you lose power.
ZOOKS RULE DA BUSH
Re: extractors
Just to add my thoughts.
There is no additional fire risk from using extractors and a bigger exhaust. The biggest fire risk in the bush is a catalytic convertor which you may not have? Perhaps you do. Extractors will put a lot more heat into the engine bay area (particularly if unshielded) so be careful about the placement of plastic parts close to the exhaust. Not really a fire risk just the risk of melting stuff. Of most concern in a Jimny where space is a little tighter but maybe not so bad in a Sierra. Since more heat is dissipated in the engine bay (this is how they work) in theory the exhaust pipe will be cooler and therefore a lower fire risk.
Extractors are generally thinner walled than a manifold and in my experience tend to corode faster and so not last as long as a stock manifold. Not sure about cracking.
A bigger exhaust will usually mean a louder exhaust because to get any benefit from it you will need to use a more free flowing muffler otherwise there is no point. (You are just using a big pipe and then blocking up the end of it.) Consider how much louder you want it to sound.
If you want to improve performance I would say stick with the stock manifold and exhaust size but go for a tripple flow muffler, one that is slighltly more free flowing than the stock one but not too noisy. In my opinion the muffler is doing more to restrict a 1.3 litre engine than the 1 1/2" exhaust pipe. The difference may be very small and hardly noticeable but then I have not seen any evidence that extractors actually improve performance on a stock Sierra either, just make them sound louder (better?).
A stock exhaust will most likely be cheaper.
Just my opinions to throw into the mix.
Mike
There is no additional fire risk from using extractors and a bigger exhaust. The biggest fire risk in the bush is a catalytic convertor which you may not have? Perhaps you do. Extractors will put a lot more heat into the engine bay area (particularly if unshielded) so be careful about the placement of plastic parts close to the exhaust. Not really a fire risk just the risk of melting stuff. Of most concern in a Jimny where space is a little tighter but maybe not so bad in a Sierra. Since more heat is dissipated in the engine bay (this is how they work) in theory the exhaust pipe will be cooler and therefore a lower fire risk.
Extractors are generally thinner walled than a manifold and in my experience tend to corode faster and so not last as long as a stock manifold. Not sure about cracking.
A bigger exhaust will usually mean a louder exhaust because to get any benefit from it you will need to use a more free flowing muffler otherwise there is no point. (You are just using a big pipe and then blocking up the end of it.) Consider how much louder you want it to sound.
If you want to improve performance I would say stick with the stock manifold and exhaust size but go for a tripple flow muffler, one that is slighltly more free flowing than the stock one but not too noisy. In my opinion the muffler is doing more to restrict a 1.3 litre engine than the 1 1/2" exhaust pipe. The difference may be very small and hardly noticeable but then I have not seen any evidence that extractors actually improve performance on a stock Sierra either, just make them sound louder (better?).
A stock exhaust will most likely be cheaper.
Just my opinions to throw into the mix.
Mike
2009 Manual Jimny
Re: extractors
Wayne, I have a set of brand new Genie extractors if you're interested.
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jonfromhamilton
- Posts: 1238
- Joined: Sun 29 Jan, 2012 8:23 pm
Re: extractors
Are they shiny Matt?
Re: extractors
Nah, they're blue. Although the genie badge on them is shiny.
Re: extractors
Hi Fellas.
Thanks for all the advice. I reckon there's wisdom in all of it. The thing I hate about exhaust manifolds is the 2 studs on the flange. Whenever I have to take my exhaust pipe off I never know if the nuts will turn or the studs will break. One has already been drilled out.
Thanks for the offer of the Genie extractors Matt. Pm me a price for them. ( got any jousting sticks?)
Regards, Wayne.
Thanks for all the advice. I reckon there's wisdom in all of it. The thing I hate about exhaust manifolds is the 2 studs on the flange. Whenever I have to take my exhaust pipe off I never know if the nuts will turn or the studs will break. One has already been drilled out.
Thanks for the offer of the Genie extractors Matt. Pm me a price for them. ( got any jousting sticks?)
Regards, Wayne.
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Richardnclark
- Financial Member
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Re: extractors
Hi Wayne,
A second hand SS LROR extractor is up for sale on ebay at the moment. The LROR web site has a useful video on their product also.
Cheers Richard
A second hand SS LROR extractor is up for sale on ebay at the moment. The LROR web site has a useful video on their product also.
Cheers Richard
Re: extractors
Hi Fellas.
I now have a new and very neat exhaust,thanks to Matts Genie extractors and Performance Exhausts in Vermont. It is inch and three quarter with a tri flow muffler.
The large tri flow muffler is mounted sideways and tucked high up beside the fuel tank, well out of the way.
But I can't help thinking it is a bit close to the fuel tank.
Does anyone know if there is a minimum distance an exhaust should be from the fuel tank? Is 3 inches acceptable?
Regards, Wayne.
I now have a new and very neat exhaust,thanks to Matts Genie extractors and Performance Exhausts in Vermont. It is inch and three quarter with a tri flow muffler.
The large tri flow muffler is mounted sideways and tucked high up beside the fuel tank, well out of the way.
But I can't help thinking it is a bit close to the fuel tank.
Does anyone know if there is a minimum distance an exhaust should be from the fuel tank? Is 3 inches acceptable?
Regards, Wayne.