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 8604 Posts Member #: 573 Formerly Axel Podland |
13th Jan, 2008 at 04:22:27pm
I've started a new thread to log my trial of the siamesed port injection code.
Edited by Paul S on 13th Jan, 2008. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 4559 Posts Member #: 786 Post Whore Bermingum |
14th Jan, 2008 at 10:57:43am
Hi,
VEMs Authorised Installer / Re-seller. K head kits now available!
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520 Posts Member #: 2093 Post Whore Grenoble, France |
14th Jan, 2008 at 09:12:59pm
Thank you Paul to share your experience. All that is very interesting. std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm |
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Forum Mod 10980 Posts Member #: 17 ***16*** SouthPark, Colorado |
14th Jan, 2008 at 09:51:04pm
Great stuff Paul, I'm jealous of your progress!
On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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520 Posts Member #: 2093 Post Whore Grenoble, France |
15th Jan, 2008 at 01:29:20pm
Paul, you say there are 2 injection per cycle. Do you mean 1 per revolution ?
std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm |
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8604 Posts Member #: 573 Formerly Axel Podland |
15th Jan, 2008 at 02:17:13pm
On 15th Jan, 2008 alpa said:
Paul, you say there are 2 injection per cycle. Do you mean 1 per revolution ? Did you manage to know when exactly the injectors are opened ? Yes, one squirt per revolution. Both ports the same. My best estimate is that they open at around TDC Nos 2 & 3. On the No. 2 cylinder induction stroke, some of the fuel is getting into No. 2 cylinder, the rest in the following No. 1 induction stroke. On the No. 2 cylinder expansion stroke, the fuel sits in the port until No. 2 cylinder inlet valve opens. And vice versa for No. 3. This explains why the inner cylinders are running rich. I think it is worse at idle due to the short pulse width. We also know the the squirt timing retards with revs. Hence, the AFRs are getting closer as the revs rise. It may get better with some load, the theory being that the pulse width will get longer. However as the VE increases, the port velocity increases and more fuel may get into the inner cylinders instead. Hopefully, get the idling issues fixed and log some data this weekend before downloading the siamesed port code. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
15th Jan, 2008 at 06:46:54pm
I think I may be a "few" days behind you Paul...
Schrödinger's cat - so which one am I ??? |
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520 Posts Member #: 2093 Post Whore Grenoble, France |
15th Jan, 2008 at 06:47:25pm
What's your pulse width at idle ?
std 998 A+, g295, MD266, RHF4, 109hp @0.8bar/5400rpm |
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8604 Posts Member #: 573 Formerly Axel Podland |
15th Jan, 2008 at 07:00:39pm
On 15th Jan, 2008 alpa said:
What's your pulse width at idle ? I'm going to test my staff in few days. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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8604 Posts Member #: 573 Formerly Axel Podland |
15th Jan, 2008 at 07:01:42pm
Respect.
On 15th Jan, 2008 retired said:
I think I may be a "few" days behind you Paul... 
Finally arrived today (imported from USA) so I'm obviously going to be watching this thread with extreme interest. Hope it goes well for you. Rod. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
15th Jan, 2008 at 08:39:32pm
On 15th Jan, 2008 Paul S said:
I find the prospect of soldering all those components beyond me. Something to do whilst it's too cold in the garage to do the real bits is the way I'm looking at it... One thing that slightly confuses me, you mention earlier in the thread about the differences between inner and outer cylinder AFRs but I thought you were going to just use thermocouples on the turbo motor rather than risk the wideband lambda probes in the manifold before the turbo? Or have I misread something again. Rod. Schrödinger's cat - so which one am I ??? |
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8604 Posts Member #: 573 Formerly Axel Podland |
15th Jan, 2008 at 08:46:54pm
On 15th Jan, 2008 retired said:
One thing that slightly confuses me, you mention earlier in the thread about the differences between inner and outer cylinder AFRs but I thought you were going to just use thermocouples on the turbo motor rather than risk the wideband lambda probes in the manifold before the turbo? I'm using wideband lambdas on the NA 1275 pictured above to try to get the AFRs equal on the inner and outer cylinders using the siamesed code. Once the AFRs are sorted then I'm going to fit thermocouples in the inner and an outer exhaust branch to measure EGTs. I'm also going to put some thermocouples under the spark plugs to measure CHTs. The hope is that measuring the AFRs and the temperatures will establish a realationship that will transfer to the turbo engine, without having to subject Widebands to exhaust presure on the turbo. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
15th Jan, 2008 at 09:09:08pm
Sorry,
Edited by Rod S on 15th Jan, 2008. Schrödinger's cat - so which one am I ??? |
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8604 Posts Member #: 573 Formerly Axel Podland |
19th Jan, 2008 at 12:39:58pm
It's idling on its own now!
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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8604 Posts Member #: 573 Formerly Axel Podland |
19th Jan, 2008 at 02:29:28pm
You've heard the story, now watch the movie!
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 9258 Posts Member #: 123 Post Whore Betwix Harrogate and York |
19th Jan, 2008 at 02:32:23pm
On 19th Jan, 2008 Paul S said:
I might be able to get it on the road for a datalog, but that depends on the weather. Not that I'm bothered about getting my car wet and dirty, but it's parked behind Axel's immaculate 30 that he will not let me move out the way if there is the slightest hint of rain. I thought you were Axel? Anyway, all sounds good. 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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8604 Posts Member #: 573 Formerly Axel Podland |
19th Jan, 2008 at 02:35:11pm
On 19th Jan, 2008 wil_h said:
I thought you were Axel? Axel is my 19 year old son (one of three who each own a Mini). Originally created the login for him, but ended up using it myself! Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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Site Admin  15300 Posts Member #: 337 Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner & TM legend. |
19th Jan, 2008 at 03:10:10pm
On 19th Jan, 2008 Paul S said:
immaculate 30 that he will not let me move out the way if there is the slightest hint of rain. Tell him bollocks! As robert once said in a thread "My house my rules" LOL!
On 29th Nov, 2016 madmk1 said:
On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else Like fuel 😂😂 |
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152 Posts Member #: 1074 Advanced Member Northamptonshire |
19th Jan, 2008 at 03:50:14pm
I am part way through my conversion to turbo/injection from N/A megajolt.
Edited by matnrach on 19th Jan, 2008. |
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5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
19th Jan, 2008 at 09:20:42pm
matnrach - where are you based ???
Schrödinger's cat - so which one am I ??? |
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152 Posts Member #: 1074 Advanced Member Northamptonshire |
19th Jan, 2008 at 10:21:11pm
I'm UK based.
Edited by matnrach on 19th Jan, 2008. |
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4559 Posts Member #: 786 Post Whore Bermingum |
19th Jan, 2008 at 10:32:58pm
Hi,
VEMs Authorised Installer / Re-seller. K head kits now available!
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8604 Posts Member #: 573 Formerly Axel Podland |
20th Jan, 2008 at 01:00:12pm
Took the first datalog this morning with the EFI fitted.
Edited by Paul S on 21st Jan, 2008. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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8604 Posts Member #: 573 Formerly Axel Podland |
20th Jan, 2008 at 01:01:24pm
On 19th Jan, 2008 Bat said:
Hi, Paul have you noticed any lag in throttle response with the TB that far away from the engine? Cheers, Gavin :) There is a small lag, but nothing to cause any problems and you would soon get used to it. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 6745 Posts Member #: 828 Post Whore uranus |
20th Jan, 2008 at 01:31:23pm
thats really interesting .thanks. Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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