John P
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| posted on 20/12/05 at 01:56 PM |
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Bike Carbs and Emissions
I'm planning to buld a Zetec engined LoCost and have just bought a set of carbs from an R1 which I intend to use with the MegaJolt unit
I'm building.
I haven't yet bought an engine but suspect getting a pre 1975 unit in good condition is going to be difficult.
Is it possible to get a carburetted engine through the SVA emmissions requirements if using a later engine? I realise I will need a Cat.
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cryoman1965
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| posted on 20/12/05 at 02:03 PM |
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quote:
Originally posted by John P
I haven't yet bought an engine but suspect getting a pre 1975 unit in good condition is going to be difficult.
yes getting a 1975 engine will be difficult
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UncleFista
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| posted on 20/12/05 at 02:09 PM |
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Build it with the Zetec, then before SVA replace it with a crossflow, pass SVA then put any engine you like in and only have to pass the visible smoke
test.
Unless I'm missing something ? 
Tony Bond / UncleFista
Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...
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ChrisGamlin
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| posted on 20/12/05 at 02:22 PM |
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Building a car with one engine and then swapping for another isnt a hugely simple job and makes it a lot more expensive to do, surely it would be far
simpler to just slap a cat on it and play around until you can pass emissions with the engine you actually want?
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UncleFista
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| posted on 20/12/05 at 03:01 PM |
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quote:
Originally posted by ChrisGamlin
Building a car with one engine and then swapping for another isnt a hugely simple job and makes it a lot more expensive to do, surely it would be far
simpler to just slap a cat on it and play around until you can pass emissions with the engine you actually want?
I beg to differ
Take out the Zetec, leaving the gearbox in place, make up some mounts and drop the crossflow in.
It'd be worth it to me just so I could change engines at will with no need to worry about emmisions 
Tony Bond / UncleFista
Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...
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zilspeed
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| posted on 20/12/05 at 03:18 PM |
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And you can re-use the xflow exhaust with minimal fettling.
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John P
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| posted on 20/12/05 at 03:30 PM |
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Opps!
Sorry, I obviously meant to say 1995 not 1975! No wonder cryoman agreed it would be difficult.
I did consider using an older engine just for the SVA and then changing it but it does seem a bit of a nonsense.
Has anyone actually achieved SVA on carbs with a post 1995 engine?
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smart51
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| posted on 20/12/05 at 04:11 PM |
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quote:
Originally posted by John P
Has anyone actually achieved SVA on carbs with a post 1995 engine?
Yes, Me! I used R1 carbs on my R1 engine and (eventually) got through SVA.
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ChrisGamlin
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| posted on 20/12/05 at 04:16 PM |
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quote:
Originally posted by UncleFista
I beg to differ
Take out the Zetec, leaving the gearbox in place, make up some mounts and drop the crossflow in.
It'd be worth it to me just so I could change engines at will with no need to worry about emmisions
Is it really as simple as that though, even if you can reuse the exhaust on both engines, what about electrics and plumbing etc, thats not all going
to be the same is it, and if you run a stock crossflow with the downdraft carb won't it need a bonnet hole?
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zxrlocost
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| posted on 20/12/05 at 04:35 PM |
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i agree with chris what a pain in the ass job
just stick the engine in thats actualy going in the car
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Taz Surfleet
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| posted on 20/12/05 at 08:05 PM |
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Isnt there something to do with mot's and DVLC computers logging all a cars spec that kinda puts a stop to just swapping an engine over ?
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smart51
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| posted on 20/12/05 at 10:05 PM |
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You have to tell the DVLA if you change your engine. You can change the engine on any car though.
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Dusty
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| posted on 20/12/05 at 10:39 PM |
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Pre 95 silvertop zetecs are cheap and easy to find and will be easier to pass on carbs. You can switch to a blacktop very easily later if you want to.
Don't think you would notice much difference.
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russbost
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| posted on 12/1/06 at 11:53 PM |
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Re the MoT, yes all details are now logged, but not usually engine no.'s as they're often illegible anyway. Yes you should tell DVLA if
you change it, but Mot ignores everything but visible smoke on anything "Q" plated. Other than that it's all age related, buy
something pre '95 & all is OK
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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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Avoneer
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| posted on 13/1/06 at 07:37 AM |
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quote:
Originally posted by russbost
Re the MoT, yes all details are now logged, but not usually engine no.'s as they're often illegible anyway. Yes you should tell DVLA if
you change it, but Mot ignores everything but visible smoke on anything "Q" plated. Other than that it's all age related, buy
something pre '95 & all is OK
Only now we are all computerised, when you go for an MOT, your details on the computer will be the same as SVA and you will need to meet the same
requirements - no longer a smoke test for a "Q".
This is what's killing me with my '97 blade - I'll need a cat every year for the MOT.
Pat...
No trees were killed in the sending of this message.
However a large number of electrons were terribly inconvenienced.
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