Patrico777 Posted October 31, 2016 Share Posted October 31, 2016 Hi wanted to ask it got colder these days and my st150 feels a lot faster is it because of the cold air ?? Quote Link to comment Share on other sites More sharing options...
MPX309 Posted October 31, 2016 Share Posted October 31, 2016 Well cold air is more dense, and the denser the air the more "explosive" the fuel mixture (Nitrous) . . . Not sure weather it's turned cold enough to be able to tell a difference in performance? Could be. Someone else might know. Quote Link to comment Share on other sites More sharing options...
Pullock Posted October 31, 2016 Share Posted October 31, 2016 I doubt it has made any difference besides allowing your engine to run a little cooler, the performance increase is probably psychological. Quote Link to comment Share on other sites More sharing options...
biff55 Posted October 31, 2016 Share Posted October 31, 2016 2 hours ago, Patrico777 said: Hi wanted to ask it got colder these days and my st150 feels a lot faster is it because of the cold air ?? are you being serious ? it was 18 deg C in kent today lol. 1 Quote Link to comment Share on other sites More sharing options...
Dan P Posted October 31, 2016 Share Posted October 31, 2016 It may feel different owing to a change in the fuel mix. I suspect that the mix of hydrocarbons in petrol is different in summer and winter owing to their different volatilities. Short hydrocarbons are cheaper to produce but evaporate at a lower temperature so you don't want too high a mix of them in warm conditions. Short hydrocarbons have a lower calorific value too so mpg would probably go down too. 1 Quote Link to comment Share on other sites More sharing options...
Pullock Posted November 1, 2016 Share Posted November 1, 2016 34 minutes ago, Dan P said: It may feel different owing to a change in the fuel mix. I suspect that the mix of hydrocarbons in petrol is different in summer and winter owing to their different volatilities. Short hydrocarbons are cheaper to produce but evaporate at a lower temperature so you don't want too high a mix of them in warm conditions. Short hydrocarbons have a lower calorific value too so mpg would probably go down too. And today I learnt Dan is a petrol chemist, if it exists. The actual name escapes me, I hate colds and being sleepy :( 1 Quote Link to comment Share on other sites More sharing options...
GaryPL Posted November 1, 2016 Share Posted November 1, 2016 8 hours ago, Pullock said: And today I learnt Dan is a petrol chemist, if it exists. The actual name escapes me, I hate colds and being sleepy :( Petrolologist. (Joking for the more serious of us :-P) Quote Link to comment Share on other sites More sharing options...
Pullock Posted November 1, 2016 Share Posted November 1, 2016 41 minutes ago, GaryPL said: Petrolologist. (Joking for the more serious of us :-P) After a quick google its petroleum chemist, that's such a boring title. Quote Link to comment Share on other sites More sharing options...
Patrico777 Posted November 1, 2016 Author Share Posted November 1, 2016 I started to use v power nitro instead of normal Shell petrol could it be that ? Quote Link to comment Share on other sites More sharing options...
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