griffith 500's with cats
Discussion
hello,
I'm right now very seriously considering buying a 93 griff 500, it has cats fitted. It's a car that hasn't been used for a good few years.
Are the cats such a problem, do we simply gut them or remove then or what?
Imagine this has been discussed before, did a search here and couldn't find anything.. very grateful for any links, advice etc.
thanks in advance
in fact any pre buy advice for griff 500's would be greatly appreciated
I'm right now very seriously considering buying a 93 griff 500, it has cats fitted. It's a car that hasn't been used for a good few years.
Are the cats such a problem, do we simply gut them or remove then or what?
Imagine this has been discussed before, did a search here and couldn't find anything.. very grateful for any links, advice etc.
thanks in advance
in fact any pre buy advice for griff 500's would be greatly appreciated
Id leave as is until you get the car running for a while- they can run perfectly well with cats. The 5tr motors are not short of performance in the first place, and removing cats can make the noise go up considerably, so Id leave judgement until you have done a few miles. There is no difference in the fuelling patterns above 3400 rpm as the ECU goes open loop, so you dont loose BHP trying to keep the emission down anyway.
What 'blitz' said.
Pre-cats (in manifolds) are essentially for engine in warm-up phase in any event. A number of folks have beaten the matrix out of these.
Main cat is in Y-piece. My only 'concern' might be with a car that is not regularly used/short journeys, where the cat matrix becomes partially or totally blocked.
Get car running smoothly first.
Nick
Pre-cats (in manifolds) are essentially for engine in warm-up phase in any event. A number of folks have beaten the matrix out of these.
Main cat is in Y-piece. My only 'concern' might be with a car that is not regularly used/short journeys, where the cat matrix becomes partially or totally blocked.
Get car running smoothly first.
Nick
very much appreciated
is short are you guys saying it's no biggie if its not a pre cat griffith.. seeing pre cat griffiths advertised as being the preferred i just had to ask
thanks again..
i'm getting very closer to owning this car.. it's always a ride owning and getting these things running smoothly in all respects, part of the entertainment and pleasure of it all i know
is there a buyers guide for griffs here.. body is coming off i know about the corrosion
electrics i suppose .. yes that's a concern of mine, and always electronics
is short are you guys saying it's no biggie if its not a pre cat griffith.. seeing pre cat griffiths advertised as being the preferred i just had to ask
thanks again..
i'm getting very closer to owning this car.. it's always a ride owning and getting these things running smoothly in all respects, part of the entertainment and pleasure of it all i know
is there a buyers guide for griffs here.. body is coming off i know about the corrosion
electrics i suppose .. yes that's a concern of mine, and always electronics
silvertrevor said:
very much appreciated
seeing pre cat griffiths advertised as being the preferred i just had to ask
Really? I suspect the majority of 500's still have pre-cats and cats fitted and their owners are happy with that. There are only a small number of dedicated enthusiasts that can be bothered to swap the cats in for the MOT every year and then out again for a few more db's and bhp's. When selling, again there is a limited market for non-cat cars made after the emission rules were tightened in 1992.seeing pre cat griffiths advertised as being the preferred i just had to ask
Englishman said:
Really? I suspect the majority of 500's still have pre-cats and cats fitted and their owners are happy with that. There are only a small number of dedicated enthusiasts that can be bothered to swap the cats in for the MOT every year and then out again for a few more db's and bhp's. When selling, again there is a limited market for non-cat cars made after the emission rules were tightened in 1992.
let me guess. the people saying that they are preferred are the people selling them? ;-)I never noticed any real difference when I went from a 4.3 to a Griff 500.
That would be reflected in any exhaust modification that reduces back pressure- just like putting straight through pipes in the centre box. A local 4 ltr owner stripped out the cats and centre box, and to say it sounded like a Lancaster Bomber on take off was an understatement, it was crazy.
You should have heard my 4.0 with sleeved exhaust, no pre cats, no main cats and just a couple of cones in the main cat bucket ... bloody hell that was *LOUD*!
New exhaust has been made with silencers in it...
I believe on up to a '94 car cats weren't obligatory as mine seems to have been MOT'd as a "'94 non cat vehicle" according to the MOT emissions test sheet and I'm told it was a 'legit' MOT...
Phil
New exhaust has been made with silencers in it...
I believe on up to a '94 car cats weren't obligatory as mine seems to have been MOT'd as a "'94 non cat vehicle" according to the MOT emissions test sheet and I'm told it was a 'legit' MOT...
Phil
Byker28i said:
What's the heat output like with the cats in and out, does it make any difference to engine temps?
On the cerbera it's good to remove them as they sit next to the gearbox/in the tunnel and heat gearbox/clutch/cabin
Do you have a Spd 6 Cerbie then??On the cerbera it's good to remove them as they sit next to the gearbox/in the tunnel and heat gearbox/clutch/cabin
On the Rover engine cars, the main cat is effectively just behind the radiator.
Probably not such a bad location...but as it's a grp bodied car they do add to the under-bonnet heat.
Nick
nawarne said:
Byker28i said:
What's the heat output like with the cats in and out, does it make any difference to engine temps?
On the cerbera it's good to remove them as they sit next to the gearbox/in the tunnel and heat gearbox/clutch/cabin
Do you have a Spd 6 Cerbie then??On the cerbera it's good to remove them as they sit next to the gearbox/in the tunnel and heat gearbox/clutch/cabin
On the Rover engine cars, the main cat is effectively just behind the radiator.
Probably not such a bad location...but as it's a grp bodied car they do add to the under-bonnet heat.
Nick
Rover engine cars have them in or around the big Y don't they? Which is why I wondered if they added significantly to the under bonnet temps or if the location for airflow or fans when in traffic assisted keeping that down. Just curiosity between the designs.
Byker28i said:
nawarne said:
Byker28i said:
What's the heat output like with the cats in and out, does it make any difference to engine temps?
On the cerbera it's good to remove them as they sit next to the gearbox/in the tunnel and heat gearbox/clutch/cabin
Do you have a Spd 6 Cerbie then??On the cerbera it's good to remove them as they sit next to the gearbox/in the tunnel and heat gearbox/clutch/cabin
On the Rover engine cars, the main cat is effectively just behind the radiator.
Probably not such a bad location...but as it's a grp bodied car they do add to the under-bonnet heat.
Nick
Rover engine cars have them in or around the big Y don't they? Which is why I wondered if they added significantly to the under bonnet temps or if the location for airflow or fans when in traffic assisted keeping that down. Just curiosity between the designs.
The later cars definitely suffered heat sink problems. Never experienced the 'hot gearstick' issue with my previous Chimaera. Actually, the handbrake on the Tuscan gets pretty warm too!
Nick
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