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Search found 254 matches

by 4vpc
Mon Feb 24, 2020 5:53 pm
Forum: Electric & Hybrid Vehicle ** NEW **
Topic: Wow , diesel cars and light diesel vehicles banned in Europe!
Replies: 9
Views: 1708

Re: Wow , diesel cars and light diesel vehicles banned in Europe!

They're only banning the sale of cars, everything else will be business as usual. It'll just mark the start of the decline.
No new cars will cause gas stations to close bit by bit....
by 4vpc
Sat Feb 22, 2020 11:05 pm
Forum: Engine Tech
Topic: Running a Diesel with no load and no water
Replies: 11
Views: 554

Re: Running a Diesel with no load and no water

Quite possibly it would, modern diesels run very cool. I remember one diesel I had for 10yrs, in all that time I heard the cooling fan cut in just once as I'd pulled a trailer with car on through some heavy traffic on a hot Summers day and pulled up. I also remember sitting in it one day in freezing...
by 4vpc
Mon Feb 17, 2020 5:23 am
Forum: General Tech
Topic: Ford's Mystery Fix Explained
Replies: 18
Views: 657

Re: Ford's Mystery Fix Explained

I haven't watched the video, because I'm not going to listen to some guy yakking in front of a camera for six minutes when I could read a few paragraphs in less time. I'm one one minute in and am bored stupid by this guy so have switched off, like a lot of people on YT he could have summed it up in...
by 4vpc
Tue Dec 10, 2019 4:27 pm
Forum: Engine Tech
Topic: Port texture and velocity
Replies: 25
Views: 2207

Re: Port texture and velocity

Does it matter what finish you put on an exhaust port anyhow? As soon as you turn the key it's covered in soot and it just gets thicker the more you run it.
by 4vpc
Fri Nov 29, 2019 3:33 am
Forum: Engine Tech
Topic: Wrist pin diameter and rpms
Replies: 21
Views: 886

Re: Wrist pin diameter and rpms

When your subtle campaign falls on deaf ears.
Or blind eyes #-o :wink:
by 4vpc
Tue Nov 26, 2019 9:30 am
Forum: Engine Tech
Topic: Stuck headstuds in aluminum block
Replies: 25
Views: 1306

Re: Stuck headstuds in aluminum block

Heat and lots of it every time. I have never once had any luck with any magic potions on studs which are solid. I'm of the opinion they are largely useless for this as the liquid can't get in anyhow.
by 4vpc
Tue Nov 26, 2019 9:27 am
Forum: Engine Tech
Topic: Cam lobe wear
Replies: 14
Views: 2158

Re: Cam lobe wear

looks normal to me. The original pic for this thread has gone, but still available on Google images and a bit blurred. I thought i'd just tag mine onto this thread and ask if this striation on the nose of this cam is just normal? It is DOHC on buckets, has done just 50 miles and is on the ex cam, b...
by 4vpc
Sun Nov 24, 2019 5:41 am
Forum: Engine Tech
Topic: How to provide oiling to the piston pin in a forged piston?
Replies: 22
Views: 2275

Re: How to provide oiling to the piston pin in a forged piston?

Old thread I know, but IMO the best way is to look at a modern engine and see what they do. One I looked at the other day had 8 oiling points per piston, some of that is because it had the pin pressed into the rod. It had two grooves, one hole drilled below and one from the oil control ring groove d...
by 4vpc
Thu Nov 21, 2019 6:42 am
Forum: Engine Tech
Topic: Rod side clearance oil squirting?
Replies: 45
Views: 1420

Re: Rod side clearance oil squirting?

it seems like that would make it work either direction. Can't put it in wrong, always a wise design choice. A lot of modern stuff is like that, it's because it's robot built. Valve guides now are the same at both ends, I suspect they're fed into some machine a bit like bullets into a machine gun an...
by 4vpc
Wed Nov 20, 2019 5:45 pm
Forum: Engine Tech
Topic: Rod side clearance oil squirting?
Replies: 45
Views: 1420

Re: Rod side clearance oil squirting?

I think the hot rodder needs to carefully study the design and execution of the slots. Haphazard attention to detail will yield haphazard results. Below are two Honda piston and rod assemblies. In "a" the oil is aimed under the piston; in "b" it is sprayed on the cylinder walls. honda a.jpg honda b...
by 4vpc
Sat Nov 16, 2019 7:11 pm
Forum: Engine Tech
Topic: Exhaust Sizing on Turbocharged Engines...??
Replies: 15
Views: 676

Re: Exhaust Sizing on Turbocharged Engines...??

Does an N/A engine need an exhaust system (after the manifold) for power purposes? Serious question as I see performance engines with no exhausts so presume they are just for noise reduction.
by 4vpc
Sat Nov 16, 2019 7:01 pm
Forum: Engine Tech
Topic: Do electric turbo chargers work???
Replies: 22
Views: 1312

Re: Do electric turbo chargers work???

OEM ones do, probably not the one in your link though.
by 4vpc
Sat Nov 16, 2019 6:28 pm
Forum: Engine Tech
Topic: Exhaust Sizing on Turbocharged Engines...??
Replies: 15
Views: 676

Re: Exhaust Sizing on Turbocharged Engines...??

NORSK wrote:
Sat Nov 16, 2019 4:42 pm
rule of thumb is,the exhaust pipe AFTER the turbocharger can really never be too big
^ This. The only reason you fit an exhaust to a turbo car is to quieten it down, from a power perspective it doesn't need one.
by 4vpc
Mon Nov 11, 2019 3:52 am
Forum: Engine Tech
Topic: Modern Engines & Static CR vs. Boost Levels?
Replies: 32
Views: 1210

Re: Modern Engines & Static CR vs. Boost Levels?

An overview of the BMW engines here discussing the differences and modifications needed to make it work: http://youwheel.com/home/2016/03/27/detailed-analysis-the-bmw-b58-inline-6-cylinder-engine/ It has a mechanical water pump and additional electric one. The invention of the electronic wastegate h...