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 8604 Posts Member #: 573 Formerly Axel Podland |
22nd Jun, 2008 at 01:58:12pm
Took the first logs of Exhaust Gas Temperatures and Cylinder Head Temperatures this morning.
Edited by Paul S on 22nd Jun, 2008. 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 |
22nd Jun, 2008 at 02:19:56pm
EGT same due to one probe recording 2 cyls worth of gas and other probe on one cyl ?
Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
22nd Jun, 2008 at 02:26:29pm
how are you measuring the CHT?
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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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Jun, 2008 at 02:59:40pm
On 22nd Jun, 2008 robert said:
EGT same due to one probe recording 2 cyls worth of gas and other probe on one cyl ? (whereas one would expect them to be higher on the lean outers .) head temp, higher on outers as expected . outers running leaner ,(as well as being due to all the other stuff talked about) ,poss aided by long primary runners creating more scavenge so more air flow and hence leaner ?. I dont really think that we can draw too many conclusions from this data. The AFRs need to overlap at least to make comparisons. Although the centre exhaust port carries twice the heat, the gas temperature should be much the same, but the outer sensor has more time to cool between gas pulses. I certainly did not expect the EGTs to be much the same whatever load though. Interesting that they blip through a gearchange, indicating that they are quick to react. The CHTs move very slowly. I might swap the sensors over to double check the readings, but they were the same at start/warm up. 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 |
22nd Jun, 2008 at 03:02:30pm
On 22nd Jun, 2008 mini13 said:
how are you measuring the CHT? have you measured all four or just one inner one outer? what im getting at is if you have just measured 3&4 4 might be hotter than 3, 3 but 3 might be hotter than 2 and 2 hotter than 1. although I'm sure you've thought of that. I have a thermocouple in No. 1 and the centre exhaust ports. I also have washer type thermocouples under the spark plugs of cylinders 1 & 2. I could measure 2 & 3 plugs to see if they run the same or not. EGT Thermocouple: 
CHT Thermocouples: 
In the car: 
Edited by Paul S on 22nd Jun, 2008. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
22nd Jun, 2008 at 03:07:27pm
I think a log on 2&3 or 1&4 is wel worth a go, I think 1&4 are most likly to be different. 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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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Jun, 2008 at 03:09:09pm
Bugger, the cables wont stretch to No. 4. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
22nd Jun, 2008 at 03:10:07pm
sods law! 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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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Jun, 2008 at 03:22:16pm
Acsherly, they will just.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
22nd Jun, 2008 at 03:30:22pm
well, make sure the engine wont move and fuck them. 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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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Jun, 2008 at 05:24:59pm
No. 3 CHT does run slightly higher than No. 2 under load.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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 8297 Posts Member #: 408 Turbo Love Palace Fool Aylesbury |
22nd Jun, 2008 at 05:31:13pm
Is it worth checking the CHT's on the head of a carbed engine to get some idea of what temperature difference you can get away with?
https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel
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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Jun, 2008 at 05:47:34pm
On 22nd Jun, 2008 matty said:
Is it worth checking the CHT's on the head of a carbed engine to get some idea of what temperature difference you can get away with? At least then it would give you an idea if you've made an improvement over the carb setup?  I can see your point, but that assumes that the carb gives equal AFRs, but we now know it does not. My current EFi setup needs a cam sensor and an ECU mod before we can make further improvements to the fuel distribution. With closer AFRs, the temperatures will have more meaning. 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 |
22nd Jun, 2008 at 08:55:16pm
yep that trace to 5600 rpm shows what looks like a diverging pattern , supports the inertia loading of fuel inot 3/2 and the problem changing direction for 1/4 as gas speed goes up ?ooooorrrr
Edited by robert on 22nd Jun, 2008. Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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