Jasongray5
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| posted on 18/1/09 at 09:18 PM |
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R1 engine Question EFI or Carbs
I have been found for sale, a late ('00) carb'd r1 lump and running gear, but also a '03 R1 EFI lump, money isnt realy the issue,
I just would like to know which is the better engine? And which is going to be easier to get through an IVA
Cheers Guys
Jas Gray
How hard can it be?
http://www.flickr.com/photos/33261515@N03/sets/72157611049241239/
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nitram38
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| posted on 18/1/09 at 09:34 PM |
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I'd go for efi with a power commander. It will make your emissions easier for a start.
That was my choice for the MotaLeira
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Steve Hignett
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| posted on 18/1/09 at 09:36 PM |
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If money isn't really an issue, then why are you limiting youself to just those two engines?
If it was out of those two, then I would choose the Carb'd engine.
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Jasongray5
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| posted on 18/1/09 at 09:43 PM |
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I say money isnt an issue, but I do have a budget to work to (about £1100) and they both conform to it. The carbed engine + all running gear = £500
and the 03 r1 about 1100 from malc
How hard can it be?
http://www.flickr.com/photos/33261515@N03/sets/72157611049241239/
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stuart_g
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| posted on 18/1/09 at 09:56 PM |
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I would go for '03 injected engine.
It will be easier to tune through a power commander where as a carb'd engine will need a dynojet kit and fiddling around to get the best out of
it.
Just my 2p worth.
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Jasongray5
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| posted on 18/1/09 at 09:59 PM |
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quote:
Originally posted by stuart_g
I would go for '03 injected engine.
It will be easier to tune through a power commander where as a carb'd engine will need a dynojet kit and fiddling around to get the best out of
it.
Just my 2p worth.
My guts are telling me to go with the EFI, It would be harder to get it going, but much earier to tune and get through the emmisions...?
How hard can it be?
http://www.flickr.com/photos/33261515@N03/sets/72157611049241239/
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adithorp
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| posted on 18/1/09 at 10:03 PM |
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Injection!
The back up you'll get from Malc is good as well.
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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idl1975
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| posted on 19/1/09 at 10:10 AM |
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Power delivery will be smoother with carbs, and there's less complexity (arguably).
However, using it in a car and having the SVA/IVA to worry about, I would go with injected. It will be much easier to map it properly for the usual
foam filter and car-sized exhaust via a Power Commander or similar. You can easily do a map for the IVA, as well as maps for road v. track use.
Carb setup can also be a massive PITA and take ages if you do it yourself. You'll probably also get it wrong if you do it without a dyno and
something to meter fuel/air ratio.
With EFI and a power commander, you can probably find appropriate maps for kit cars on the web or get them from other forum members - the whole thing
becomes a 5 minute process of downloading the map and then flashing the PC.
quote:
Originally posted by Jasongray5
I have been found for sale, a late ('00) carb'd r1 lump and running gear, but also a '03 R1 EFI lump, money isnt realy the issue,
I just would like to know which is the better engine? And which is going to be easier to get through an IVA
Cheers Guys
Jas Gray
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A1
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| posted on 19/1/09 at 10:17 AM |
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how hard would the 03 be to get going?
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BenB
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| posted on 19/1/09 at 11:32 AM |
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Go EFi. Carbs are nice and simple technology but optimising them is a PITA and although venturi roar sounds great that noise comes takes up energy.
Energy you could have as BHP. TBs don't need venturi's so they don't have a by-default slightly strangled inlet.
The only advantage of carbs is they're easier to get "about right". But as always with carbs its a question of compromise. With EFi
you can't just shim the needles so you need a power commander or a stand-alone ECU.
I don't understand people who say there are advantages in the way cars drive with carbs on... A badly tuned EFi car will drive just as badly as
a badly tuned carb car. With EFi you don't have to compromise and you can get closer to a "perfect" map than with carbs.
You can get a standard carb engine and bodge it to approximately the right zone but for fine tuning EFi and a wide-band is the way to go....
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jimgiblett
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| posted on 20/1/09 at 03:26 PM |
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quote:
Originally posted by idl1975
Power delivery will be smoother with carbs, and there's less complexity (arguably).
Not in my experience. I have had both carbed and FI R1 engined cars. FI gives a much smother power delivery. It is hard work to get the flat spots
covered with a carb set up.
The electrics and fuel sytem (swirl pot and return lines) are the only thing that makes it more complicated to build.
- Jim
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