russbost
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| posted on 20/4/17 at 01:12 PM |
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Are 2 CAT's better than 1
Just thinking out loud here.
Car I'm currently building for a customer has the latest 2016 ZZR1400 engine which already has a small CAT built into the first section of the
exhaust where it goes 4 into 1, I normally keep the headers & this first section of exhaust & then add to it as required,
My question is this, if I simply add my normal IVA exhaust system which has a CAT built into it & use a power commander in the usual way, is there
any reason why 2 CAT's in series would actually produce a worse result in terms of the right balance of gases for IVA than just having my normal
single CAT?
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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SPYDER
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| posted on 20/4/17 at 01:26 PM |
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Hi Russ. Will the second CAT get hot enough to operate properly?
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Stevie_P
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| posted on 20/4/17 at 03:05 PM |
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A few cars have precats as well as the main cat.
My old TVR Chimaera and Toyota MR2 being a couple.
I assumed it was to get the emissions down ASAP as the precats will heat up really quickly being in the manifold.
Don't think this helps the OP question mind.
Steve
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Dick
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| posted on 20/4/17 at 03:58 PM |
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I hate the pre cat that they fit into the headers have seen to many engines go bang due to them breaking up up and being drawn in via egr's
systems or back firing engines. Take them out and bin them
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Stevie_P
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| posted on 20/4/17 at 04:02 PM |
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This is a bit of a problem with the Toyota engine for sure.
Plenty stories of them being ruined by dragging bit of wayward cat ceramic into the chamber..
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russbost
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| posted on 20/4/17 at 04:21 PM |
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quote:
Originally posted by SPYDER
Hi Russ. Will the second CAT get hot enough to operate properly?
Well, I guess that's my question, or at least a part of it, I'm not sure that the first CAT being only a small bike CAT is enough to do
the job on its own, the gases should be good & hot coming out of that CAT (not that bike headers ever run exactly cool!!), but I guess the Q is
whether they still have enough CO & HC's to make the 2nd CAT start working, I don't think temp itself would be a problem, looking at
the lack of any paint left on the first exhaust box of any of my cars, but will a CAT still work if there is only a limited amount of the gas to work
with?
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
Dick
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| posted on 20/4/17 at 05:39 PM |
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quote:
Originally posted by Stevie_P
This is a bit of a problem with the Toyota engine for sure.
Plenty stories of them being ruined by dragging bit of wayward cat ceramic into the chamber..
Yep these and the merc v engine had a few of these in bits in the workshop
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indykid
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| posted on 21/4/17 at 05:25 PM |
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Does the bike have another cat in series?
If not, it's no more engine so shouldn't need any more cat...
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Ugg10
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| posted on 21/4/17 at 06:42 PM |
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quote:
Originally posted by Stevie_P
This is a bit of a problem with the Toyota engine for sure.
Plenty stories of them being ruined by dragging bit of wayward cat ceramic into the chamber..
Also a Maserati problem, had a friend with a quattroporte that had this issue, bit more expensive to change the engine than a Toyota.
---------------------------------------------------------------
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russbost
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| posted on 22/4/17 at 11:52 AM |
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quote:
Originally posted by indykid
Does the bike have another cat in series?
If not, it's no more engine so shouldn't need any more cat...
,
not unless there is anything within the actual rear pipes, which I don't think there was, but I strongly suspect that the bike probably
doesn't have such strict emissions criteria to adhere to, I guess it's going to be a case of suck it & see
I no longer run Furore Products or Furore Cars Ltd, but would still highly recommend them for Acewell dashes, projector headlights, dominator
headlights, indicators, mirrors etc, best prices in the UK! Take a look at http://www.furoreproducts.co.uk/ or find more parts on Ebay, user names
furoreltd & furoreproducts, discounts available for LCB users.
Don't forget Stainless Steel Braided brake hoses, made to your exact requirements in any of around 16 colours.
http://shop.ebay.co.uk/furoreproducts/m.html?_dmd=1&_ipg=50&_sop=12&_rdc=1
|
NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
|
