Spoonman Posted April 17, 2014 Share Posted April 17, 2014 What are your arguments against warming up an engine ? Link to comment Share on other sites More sharing options...
MrY Posted April 17, 2014 Share Posted April 17, 2014 What are your arguments against warming up an engine ? The engine's internal components have much larger clearances when cold than when warm, thus more wear on the parts. A light load on the engine is quicker to warm up the engine, so less wear. But this makes approximately zero difference in Thailand as the engine never gets cold enough for this start-up wear to be significant. Living in a properly cold country, I used to observe the oil pressure gauge peg out on engine start and once it started coming down I started driving. Still, it could take 5-10 minutes for the engine to come up to temperature. People warming up their engines at idle wore them out in relatively short order. I'd say give it a good few seconds and just start driving, but don't rev the engine or use full power until warm. Link to comment Share on other sites More sharing options...
techboy Posted April 17, 2014 Share Posted April 17, 2014 "Amazing Thailand" you say- You mean like to single Thailand out for these antics? That is pure and simply asinine. Talk about being "born just last night". Link to comment Share on other sites More sharing options...
bkkjames Posted April 17, 2014 Share Posted April 17, 2014 I found the opposite to be true. Thai genious says one is to put the car into a higher gear when overtaking as 5th is faster than 4th. Sent from my GT-P3100 using Tapatalk My ex Thai g/f let her diesel engine warm up for 20 min. before driving. My arguments against it were ignored. actually she was most likely just trying to get the aircon nice and cool... Link to comment Share on other sites More sharing options...
BKKdreaming Posted April 17, 2014 Share Posted April 17, 2014 there always seems to be someone bitching about what people do to "disturb" their western lifestyle in BKK..... I can just see Clint Eastwood screaming "get off my lawn" is there a ThaiVisa for Thais where they bitch about us and our stupid Western ways Link to comment Share on other sites More sharing options...
bkkjames Posted April 17, 2014 Share Posted April 17, 2014 there always seems to be someone bitching about what people do to "disturb" their western lifestyle in BKK..... I can just see Clint Eastwood screaming "get off my lawn" is there a ThaiVisa for Thais where they bitch about us and our stupid Western ways yes, it's called facebook. 1 Link to comment Share on other sites More sharing options...
worldfun Posted April 18, 2014 Share Posted April 18, 2014 what does it tells about a guy and his choice of thai gf. oh what a can of worms getting warmed up Sent from my GT-I9300 using Thaivisa Connect Thailand mobile app Link to comment Share on other sites More sharing options...
transam Posted April 18, 2014 Share Posted April 18, 2014 I found the opposite to be true. Thai genious says one is to put the car into a higher gear when overtaking as 5th is faster than 4th. Sent from my GT-P3100 using Tapatalk My ex Thai g/f let her diesel engine warm up for 20 min. before driving. My arguments against it were ignored. Hmmmmmm, should start it and drive it, max oil pressure to get all around the engine comes in above idle, also the engine gets to it's recommended operating temperature under load. When starting an engine from cold a fuel enrichment process is used (choke), you let it idle you will just burn more fuel cos it takes much longer for the engine to warm up. Link to comment Share on other sites More sharing options...
Spoonman Posted April 18, 2014 Share Posted April 18, 2014 I found the opposite to be true. Thai genious says one is to put the car into a higher gear when overtaking as 5th is faster than 4th. Sent from my GT-P3100 using Tapatalk My ex Thai g/f let her diesel engine warm up for 20 min. before driving. My arguments against it were ignored. Hmmmmmm, should start it and drive it, max oil pressure to get all around the engine comes in above idle, also the engine gets to it's recommended operating temperature under load. When starting an engine from cold a fuel enrichment process is used (choke), you let it idle you will just burn more fuel cos it takes much longer for the engine to warm up. Really. A diesel pickup has a choke ? Link to comment Share on other sites More sharing options...
bkkjames Posted April 18, 2014 Share Posted April 18, 2014 I found the opposite to be true. Thai genious says one is to put the car into a higher gear when overtaking as 5th is faster than 4th. Sent from my GT-P3100 using Tapatalk My ex Thai g/f let her diesel engine warm up for 20 min. before driving. My arguments against it were ignored. Hmmmmmm, should start it and drive it, max oil pressure to get all around the engine comes in above idle, also the engine gets to it's recommended operating temperature under load. When starting an engine from cold a fuel enrichment process is used (choke), you let it idle you will just burn more fuel cos it takes much longer for the engine to warm up. Really. A diesel pickup has a choke ? on a chipped v8 vigo apparently Link to comment Share on other sites More sharing options...
transam Posted April 18, 2014 Share Posted April 18, 2014 I found the opposite to be true. Thai genious says one is to put the car into a higher gear when overtaking as 5th is faster than 4th. Sent from my GT-P3100 using Tapatalk My ex Thai g/f let her diesel engine warm up for 20 min. before driving. My arguments against it were ignored. Hmmmmmm, should start it and drive it, max oil pressure to get all around the engine comes in above idle, also the engine gets to it's recommended operating temperature under load. When starting an engine from cold a fuel enrichment process is used (choke), you let it idle you will just burn more fuel cos it takes much longer for the engine to warm up. Really. A diesel pickup has a choke ? Would have thought any engine has a cold start enrichment system, don't ask me how it works on a diesel though. All gas engines do, just in case you didn't know...... Link to comment Share on other sites More sharing options...
seedy Posted April 18, 2014 Share Posted April 18, 2014 Would have thought any engine has a cold start enrichment system, don't ask me how it works on a diesel though. All gas engines do, just in case you didn't know...... Diesel - add fuel via the ECU to get richer mixture. New gas cars - the same. Old gas cars - use a choke, which restricts air, making the mixture more rich. 1 Link to comment Share on other sites More sharing options...
Ace of Pop Posted April 19, 2014 Share Posted April 19, 2014 Early Jap imported Nissan Big Ms had a pull out Choke. A Car Like thing marked Cold Start...Never used it though. Link to comment Share on other sites More sharing options...
seedy Posted April 19, 2014 Share Posted April 19, 2014 Early Jap imported Nissan Big Ms had a pull out Choke. A Car Like thing marked Cold Start...Never used it though. Must have had mechanical FI - never seen a choke on a diesel, but I'm young yet !!! Link to comment Share on other sites More sharing options...
WarpSpeed Posted April 19, 2014 Share Posted April 19, 2014 (edited) Would have thought any engine has a cold start enrichment system, don't ask me how it works on a diesel though. All gas engines do, just in case you didn't know...... Diesel - add fuel via the ECU to get richer mixture. New gas cars - the same. Old gas cars - use a choke, which restricts air, making the mixture more rich. Doh! Yep, sensors tell the ECU the engine is cold and automatically adjust the fuel mixture accordingly.. It is also actually better to run the engine a few minutes and then shut it off a few minutes instead of idling long time, this saves fuel and the trapped water in the engines block will transfer the heat quicker and it will warm up quicker with the water sitting trapped in the block and head with a closed thermostat. Edited April 19, 2014 by WarpSpeed Link to comment Share on other sites More sharing options...
Ace of Pop Posted April 19, 2014 Share Posted April 19, 2014 The Early Big M had an entirely different engine to todays fancy ones. The Body weighed in at 250 Kilos more than the Thai built ones. Drew quite a crowd back then. Link to comment Share on other sites More sharing options...
Spoonman Posted April 19, 2014 Share Posted April 19, 2014 The Nissan was only called the Big M in Thailand so if the one you are talking about 250kg more what was it ? Link to comment Share on other sites More sharing options...
MrY Posted May 16, 2014 Share Posted May 16, 2014 What are your arguments against warming up an engine ? The engine's internal components have much larger clearances when cold than when warm, thus more wear on the parts. A light load on the engine is quicker to warm up the engine, so less wear. A bit of an exaggeration there to say "much bigger clearances".. Well, then let me put it differently to make it clear. Most engine parts have slightly larger clearances cold vs hot. Most pistons (there are exceptions) have massively larger clearances when cold due to piston and cylinder having been [usually] manufactured from materials with different expansion rate and having a different operating temperature (piston runs much hotter and thus expands more than the cylinder wall due to thermal conductivity differences). Capisce? Link to comment Share on other sites More sharing options...
Kwasaki Posted May 16, 2014 Share Posted May 16, 2014 If you've got hypereutectic alloy pistons your be OK then. Link to comment Share on other sites More sharing options...
Ace of Pop Posted May 16, 2014 Share Posted May 16, 2014 All the First Big Ms were imported from Japan, the steel gauge was thicker than the Thai ones, and had an old clonker that looked like a Benz Saloon Taxi from the seventies. Jeez the rear door was drop down crash unless you new the beast. Kept it for 17 years as a Go For , superb old chap. Link to comment Share on other sites More sharing options...
MrY Posted May 16, 2014 Share Posted May 16, 2014 If you've got hypereutectic alloy pistons your be OK then. For sure, most high-perf engines run them from the factory now. Subie STI engine clearances (for ex.) are low to nil cold. The next step up is forged pistons, which tend to be a bit noisy when cold due to large clearances. You of course could make forged pistons out of hypereutectic alloy to avoid that, but in an extreme application it's the ultimate strength that matters more. Diesel engine pistons are often hypo-eutectic (low in the alloying material, in this case silicon) due to the required knock resistance (pliability without incurring damage) and have extremely bad cold wear characteristics [offset by the usually longer run times of such engines]. Link to comment Share on other sites More sharing options...
transam Posted May 17, 2014 Share Posted May 17, 2014 (edited) What are your arguments against warming up an engine ? The engine's internal components have much larger clearances when cold than when warm, thus more wear on the parts. A light load on the engine is quicker to warm up the engine, so less wear. A bit of an exaggeration there to say "much bigger clearances".. Well, then let me put it differently to make it clear. Most engine parts have slightly larger clearances cold vs hot. Most pistons (there are exceptions) have massively larger clearances when cold due to piston and cylinder having been [usually] manufactured from materials with different expansion rate and having a different operating temperature (piston runs much hotter and thus expands more than the cylinder wall due to thermal conductivity differences). Capisce? I had forged in my engine, think it had 5th clearance, no slap noise, but they were fully floating. Edited May 17, 2014 by transam Link to comment Share on other sites More sharing options...
transam Posted May 17, 2014 Share Posted May 17, 2014 That was stock was it? You're in rare form T/A.. Correct, I can still remember stuff . No not stock, but the 455SD engine did have forged rods and pistons from factory....... Link to comment Share on other sites More sharing options...
Ace of Pop Posted May 17, 2014 Share Posted May 17, 2014 Jesus T.A,s ride was Forged. How about His Visa................ Link to comment Share on other sites More sharing options...
transam Posted May 17, 2014 Share Posted May 17, 2014 Jesus T.A,s ride was Forged. How about His Visa................ Wish it was.......... Link to comment Share on other sites More sharing options...
Ace of Pop Posted May 17, 2014 Share Posted May 17, 2014 No one makes a better Forged Piston than Mahle, but Correct Earthing is Essential. 1 Link to comment Share on other sites More sharing options...
Spoonman Posted May 17, 2014 Share Posted May 17, 2014 No one makes a better Forged Piston than Mahle, but Correct Earthing is Essential. CP do, and so does Wiseco. but it is subjective to the end use though. Link to comment Share on other sites More sharing options...
craigt3365 Posted May 18, 2014 Share Posted May 18, 2014 Several off topic and bickering posts have been removed from view. Please be civil to each other. Link to comment Share on other sites More sharing options...
Ace of Pop Posted May 18, 2014 Share Posted May 18, 2014 I only know of Mahle, because Cosworth raved about them, and so did Evo Tweakers. My ERA.Im out of touch with things revvvy these days. Link to comment Share on other sites More sharing options...
cgphuket Posted May 18, 2014 Share Posted May 18, 2014 Every time i got annoyed at the Thai motorheads, I just recall myself between the ages of 16-20 and I suddenly feel more tolerant.... 1 Link to comment Share on other sites More sharing options...
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