What has happened to my lifters?
Discussion
t, lol.
Certainly no one cares about facts in the two circumstances of religion or politics. Theists continue to think their invisible sky pixie is real despite all evidence to the contrary and Republicans think Trump is innocent for ditto reasons. However in the world of engine theory I would hope we can be more scientific. We can build an engine, change something and test to see if it made things better or worse. When we do that we find that supercharged engines are perfectly happy with the same camshafts as N/A ones. With turbos it's a bit more complex but if we go back a bit to old inefficient turbos like Garrett T3, T4 etc then the build up of exhaust back pressure favoured wider lobe separation angles than with N/A to reduce valve overlap. However with modern ceramic vane, roller bearing turbos they are so much more efficient, lighter, spin up faster and produce less back pressure that again they cope happily with standard N/A cams. In fact in some applications you might want to even tighten up the LSA with a modern turbo to achieve better high rpm pulse tuning and gas exchange.
So the word "understand" is a two edged sword. It can sometimes mean " I comprehend, or have learned", and it can equally mean "I think, I believe without evidence, I heard from a random bloke down the pub, I read in the Beano Children's Guide of Engine Tuning that....."
The word "must" has caused me much aggravation over the years also. When people use the word "must" in a sentence it invariably does not actually apply. "It MUST give more power with more ignition advance, it MUST give more power if you can get more fuel in, wider tyres MUST be better, if that cam is good then a bigger one MUST be better".
I now tend to treat the word "must" as being synonymous with "mustn't" and the word "understand" as being synonymous with " I haven't got a f'ing clue but I'm gonna say it anyway".
I am however an irrascible old curmudgeon so maybe it's possible that once in a blue moon I'm incorrect.
So the word "understand" is a two edged sword. It can sometimes mean " I comprehend, or have learned", and it can equally mean "I think, I believe without evidence, I heard from a random bloke down the pub, I read in the Beano Children's Guide of Engine Tuning that....."
The word "must" has caused me much aggravation over the years also. When people use the word "must" in a sentence it invariably does not actually apply. "It MUST give more power with more ignition advance, it MUST give more power if you can get more fuel in, wider tyres MUST be better, if that cam is good then a bigger one MUST be better".
I now tend to treat the word "must" as being synonymous with "mustn't" and the word "understand" as being synonymous with " I haven't got a f'ing clue but I'm gonna say it anyway".
I am however an irrascible old curmudgeon so maybe it's possible that once in a blue moon I'm incorrect.
DeadCatWalking said:
So the word "understand" is a two edged sword. It can sometimes mean " I comprehend, or have learned", and it can equally mean "I think, I believe without evidence, I heard from a random bloke down the pub, I read in the Beano Children's Guide of Engine Tuning that....."
Mea culpaI do try to avoid claiming something as fact, especially online, unless I can prove it
I will certainly avoid using the phrase "my understanding is" in future
It may even prompt me to do a bit more research before saying anything at all
A commendably logical approach. So clean up those lifters as I suggest and post some more photos. I will no doubt opine again.
Actually maybe not because I know exactly what they'll look like after a quick whizz on 180/240 grit given my mega years of advanced engine knowledge. A lovely dull flat slightly scratched top surface, perfectly flat. Not enough metal removal to alter the shimming.
Actually maybe not because I know exactly what they'll look like after a quick whizz on 180/240 grit given my mega years of advanced engine knowledge. A lovely dull flat slightly scratched top surface, perfectly flat. Not enough metal removal to alter the shimming.
DeadCatWalking said:
Certainly no one cares about facts in the two circumstances of religion or politics. Theists continue to think their invisible sky pixie is real despite all evidence to the contrary and Republicans think Trump is innocent for ditto reasons. However in the world of engine theory I would hope we can be more scientific. We can build an engine, change something and test to see if it made things better or worse. When we do that we find that supercharged engines are perfectly happy with the same camshafts as N/A ones. With turbos it's a bit more complex but if we go back a bit to old inefficient turbos like Garrett T3, T4 etc then the build up of exhaust back pressure favoured wider lobe separation angles than with N/A to reduce valve overlap. However with modern ceramic vane, roller bearing turbos they are so much more efficient, lighter, spin up faster and produce less back pressure that again they cope happily with standard N/A cams. In fact in some applications you might want to even tighten up the LSA with a modern turbo to achieve better high rpm pulse tuning and gas exchange.
So the word "understand" is a two edged sword. It can sometimes mean " I comprehend, or have learned", and it can equally mean "I think, I believe without evidence, I heard from a random bloke down the pub, I read in the Beano Children's Guide of Engine Tuning that....."
The word "must" has caused me much aggravation over the years also. When people use the word "must" in a sentence it invariably does not actually apply. "It MUST give more power with more ignition advance, it MUST give more power if you can get more fuel in, wider tyres MUST be better, if that cam is good then a bigger one MUST be better".
I now tend to treat the word "must" as being synonymous with "mustn't" and the word "understand" as being synonymous with " I haven't got a f'ing clue but I'm gonna say it anyway".
I am however an irrascible old curmudgeon so maybe it's possible that once in a blue moon I'm incorrect.
Yeah that's all all fine but why are we discussing "lifters" rather than cam followers?So the word "understand" is a two edged sword. It can sometimes mean " I comprehend, or have learned", and it can equally mean "I think, I believe without evidence, I heard from a random bloke down the pub, I read in the Beano Children's Guide of Engine Tuning that....."
The word "must" has caused me much aggravation over the years also. When people use the word "must" in a sentence it invariably does not actually apply. "It MUST give more power with more ignition advance, it MUST give more power if you can get more fuel in, wider tyres MUST be better, if that cam is good then a bigger one MUST be better".
I now tend to treat the word "must" as being synonymous with "mustn't" and the word "understand" as being synonymous with " I haven't got a f'ing clue but I'm gonna say it anyway".
I am however an irrascible old curmudgeon so maybe it's possible that once in a blue moon I'm incorrect.
Anyway, got to run. I've got some problems with my fenders and mufflers. And my frame isn't quite right.
DeadCatWalking said:
Certainly no one cares about facts in the two circumstances of religion or politics. Theists continue to think their invisible sky pixie is real despite all evidence to the contrary and Republicans think Trump is innocent for ditto reasons. However in the world of engine theory I would hope we can be more scientific. We can build an engine, change something and test to see if it made things better or worse. When we do that we find that supercharged engines are perfectly happy with the same camshafts as N/A ones. With turbos it's a bit more complex but if we go back a bit to old inefficient turbos like Garrett T3, T4 etc then the build up of exhaust back pressure favoured wider lobe separation angles than with N/A to reduce valve overlap. However with modern ceramic vane, roller bearing turbos they are so much more efficient, lighter, spin up faster and produce less back pressure that again they cope happily with standard N/A cams. In fact in some applications you might want to even tighten up the LSA with a modern turbo to achieve better high rpm pulse tuning and gas exchange.
So the word "understand" is a two edged sword. It can sometimes mean " I comprehend, or have learned", and it can equally mean "I think, I believe without evidence, I heard from a random bloke down the pub, I read in the Beano Children's Guide of Engine Tuning that....."
The word "must" has caused me much aggravation over the years also. When people use the word "must" in a sentence it invariably does not actually apply. "It MUST give more power with more ignition advance, it MUST give more power if you can get more fuel in, wider tyres MUST be better, if that cam is good then a bigger one MUST be better".
I now tend to treat the word "must" as being synonymous with "mustn't" and the word "understand" as being synonymous with " I haven't got a f'ing clue but I'm gonna say it anyway".
I am however an irrascible old curmudgeon so maybe it's possible that once in a blue moon I'm incorrect.
From an educational viewpoint only there is no such thing as a 'T3' or 'T4' turbo. The label refers to the size and shape of the hot side mounting flange only, nothing else.So the word "understand" is a two edged sword. It can sometimes mean " I comprehend, or have learned", and it can equally mean "I think, I believe without evidence, I heard from a random bloke down the pub, I read in the Beano Children's Guide of Engine Tuning that....."
The word "must" has caused me much aggravation over the years also. When people use the word "must" in a sentence it invariably does not actually apply. "It MUST give more power with more ignition advance, it MUST give more power if you can get more fuel in, wider tyres MUST be better, if that cam is good then a bigger one MUST be better".
I now tend to treat the word "must" as being synonymous with "mustn't" and the word "understand" as being synonymous with " I haven't got a f'ing clue but I'm gonna say it anyway".
I am however an irrascible old curmudgeon so maybe it's possible that once in a blue moon I'm incorrect.
Only one R in irascible too
Nevertheless, it's good to read something interesting on here for a change.
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