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| Home > Help Needed / General Tech Chat > SC 7 port head - emmisions levels | |||||||
 5 Posts Member #: 9360 Junior Member Malmö, Sweden |
13th Feb, 2011 at 09:22:16pm
Hi all
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4309 Posts Member #: 1321 Post Whore Wiltshire |
13th Feb, 2011 at 09:25:27pm
I'm clearly talking bollocks as sprocket has pointed out Edited by minimole23 on 14th Feb, 2011. On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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133 Posts Member #: 9277 Advanced Member Nottingham |
13th Feb, 2011 at 11:18:58pm
And for the tight bhp per kg rubbish, just set the rev limter low for the test lol, and if you had a turbo lower boost and turn it up after lol |
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3596 Posts Member #: 655 Post Whore Northern Ireland |
13th Feb, 2011 at 11:41:11pm
On 13th Feb, 2011 minisilverbullet said:
Hi all I am seriously planning a SC 7 port head on TB, on a 1380. I am in Sweden and the whole engine, tuning, swapping business is pretty difficult at the best of times, now my car is a 1996, so things are even stricter. After looking at various engine swaps, i decided against them as I would need to request the car as a modified vehicle. Also power is limited to 20bhp per 100kg, which adds to the problem. So the SC 7 port engine, seems a perfect choice, as the car wont need to be re-registered, However it may need a registering MOT equivalent. It will pass this, if the emissions levels meet what the car currently needs to meet. CO 0.5 HC 100 Lambda 0.95 - 1.09 Having spoken to John at SC, he doesn't foresee a problem, which is great news. However having spoken to a couple of engine builders they haven't been so sure. Probably on Johns advice I will be using the RE13PP cam. Anyone any opinions? Cheers! Emissions will be down to your ability to control fuel entering the engine, and camshaft choice. ( ignition timing will help too. If anything, a 7 port will help that situation. There could be no negative aspect from fitting a 7 port head in terms of emissions. With hydrocarbon target so low, you'll either need to use a very mild cam, or use a mild cam in conjunction with a catalytic convertor. Although at 1996....I'm assuming you need a CAT anyway ? I assume you are fuel injected ? limiting power could be easy. Either block the exhaust before the test, or use low ignition timing and very rich mixtures for the test. Or if you have a plenum style intake, fit a very small restrictor or something Either way, there will be multiple options to limit power Edited by stevieturbo on 13th Feb, 2011. 9.85 @ 145mph
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
14th Feb, 2011 at 12:30:56am
On 13th Feb, 2011 minimole23 said:
Maybe have an mot time only engine map, then upload a hot one afterwards. with the fuel injection though I don't see a problem anyway. Never understood this and its something a lot of people talk about. Why do you need diferent map for the engine to be economical, pass an MOT or for power? All three can be done in one map as each uses a different area of that map. On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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5 Posts Member #: 9360 Junior Member Malmö, Sweden |
14th Feb, 2011 at 10:24:56am
The power weight ratio is fine as i will be spot on.
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 10023 Posts Member #: 1456 Mongo Barnsley, South Flatcapshire |
14th Feb, 2011 at 10:37:28am
hydrocarbons are measure in parts per million.
If something is worth doing, it's worth doing half of. |
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
14th Feb, 2011 at 11:06:41am
as sprocket says, there's no reason for different maps. The hydrocarbons will be measured at idle, so you just make sure you idle mixture and ignition are right, On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
14th Feb, 2011 at 01:03:12pm
an interesting 5 gas graph. On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
14th Feb, 2011 at 01:33:18pm
That's really interesting Joe.
Fastest 998 mini in the world? 13.05 1/4 mile 106mph
On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination, talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry. |
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11046 Posts Member #: 965 Post Whore Preston On The Brook |
14th Feb, 2011 at 01:59:32pm
On 14th Feb, 2011 wil_h said:
That's really interesting Joe. Although setting your fuelling to 15-16:1 AFR at the critical points for MOT purposes has always been my aim. When you look at that graph and the requirements in the first post. It is apparent that if you have one, you'll meet the rest. What that graph cannot show however is the inefficiencies of an internal combustion engine, even with an ideal combustion, there will always be a HC volume in the exhaust as a result of the general desing of an piston engine, which is why there are cat converters. The amount of HC should be minimal. The thing with programable fuel injection is getting the injection angle, ignition advance, lambda and volume of air right to ensure a quality idle with as low emissions values as possible. Any one of those will have an effect on the final result. As has already been suggested, cam profile is a big part of achiving those emissions pass results. If the emissions are so tight, I would suggest either the SW5 cam, Kent 274 or the Kent 274SP, giving you a better chance. Any wilder and you are in danger of flunking the emissions test. A sports cat will also aid things. Removing the cat completely will only make it that bit harder every year to pass. On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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3596 Posts Member #: 655 Post Whore Northern Ireland |
14th Feb, 2011 at 08:38:51pm
Yes use a higher cell count.
9.85 @ 145mph
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