LPG Forum


All times are UTC



Post new topic Reply to topic  [ 13 posts ] 
Author Message
PostPosted: Sat Nov 15, 2014 1:29 pm 
Intermediate Member

Joined: Tue Oct 31, 2006 12:16 am
Posts: 1315
Location: Yorkshire
Some very interesting developments in the production of synthetic fuels by Audi.
http://www.digitaltrends.com/cars/eleme ... ectricity/

_________________
Regards

PJPJ



To help identify your Vauxhall LPG model, go HERE


Top
 Profile  
Reply with quote  
PostPosted: Sat Nov 15, 2014 5:25 pm 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 2916
Location: Yorkshire
Interesting, but I don't think we have much to worry about...

Producing hydrogen from water with electricity isn't really viable as it uses too much electricity (and the hydrogen needs mega strong tanks etc). To produce this fuel, seems they need to produce the hydrogen first, split CO2 from air, combine the CO2 and hydrogen at high pressures and temps (even more electricity). Handy if you own your own wind-farm or nuclear power station... But then you'd make more selling the electricity elsewhere?

Simon

_________________
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240


Top
 Profile  
Reply with quote  
PostPosted: Sat Nov 15, 2014 6:16 pm 
Intermediate Member

Joined: Tue Oct 31, 2006 12:16 am
Posts: 1315
Location: Yorkshire
At only 70% efficiency they still have a long way to go but as an alternative to fossil fuels it is an encouraging start.

_________________
Regards

PJPJ



To help identify your Vauxhall LPG model, go HERE


Top
 Profile  
Reply with quote  
PostPosted: Mon Nov 17, 2014 12:31 pm 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 2916
Location: Yorkshire
Does seem a good idea. I'm not a chemist and the plausibility of combining carbon from carbon-dioxide from the air with hydrogen split from water hadn't occurred to me but the method does seem obvious when pointed out...

Still, the problem for this would be - Where would all the electricity come from? Green energy probably wouldn't be plausible - I wonder what percentage of the earth's surface would need to be covered with solar panels and/or wind farms to make enough electricity to produce this bio fuel?

Roll on nuclear fusion reactors, and while we're at it, roll on Star Trek style matter replicators! Mind you, if the latter existed I'd probably just replicate V8 petrol engine components and build myself a muscle car then run it on LPG :lol:

Simon

_________________
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240


Top
 Profile  
Reply with quote  
PostPosted: Tue Aug 18, 2015 9:32 am 
New member

Joined: Mon Jul 15, 2013 7:34 pm
Posts: 50
Location: Bridgend, South Wales.
I remember reading about Shell V-Power diesel containing a percentage of blended LPG. Called Gas To Liquids (GTLs ) or something.


Top
 Profile  
Reply with quote  
PostPosted: Tue Aug 18, 2015 8:58 pm 
Member

Joined: Sun Aug 09, 2015 12:45 am
Posts: 322
LPGC wrote:
Mind you, if the latter existed I'd probably just replicate V8 petrol engine components and build myself a muscle car then run it on LPG :lol:

Simon


Why bother converting it to LPG? Find yourself a few gallons of the old 5 star petrol (105 octane if memory serves correctly) and stick that in the replicator. The rest as they say would be history! :wink: :D

Energy crisis solved while having a lot of fun - win-win situation!

_________________
Cheers,
Dave


Somewhere in Suffolk with a Jeep, 2 Rovers and a V6 Volvo

Image


Top
 Profile  
Reply with quote  
PostPosted: Thu Aug 20, 2015 6:46 pm 
Advanced Member

Joined: Wed Apr 09, 2008 9:00 am
Posts: 7856
Images: 0
Location: Peterborough
LairdScooby wrote:
Find yourself a few gallons of the old 5 star petrol (105 octane if memory serves correctly)
No, it was only 101 RON but you can get 105 RON if you have a local airfield, it's Avgas. Guy I know used to buy it from an airfield and run an MGB in Classic Sports racing on it. The regs were very strict on engine mods and you had to run on pump petrol. When they couldn't understand how he managed to get that much more poke out of his engine than everyone else they looked a bit closer. His argument that the petrol did come out of a pump, just one that was normally used for filling Cessnas, didn't wash......

_________________
'96 Saab 900XS, AEB Leo, sold
'93 Range Rover 4.2 LSE, Lovato LovEco, sold
'98 Ex-Police Range Rover 4.0, Singlepoint AEB Leo, my daily motor
'97 Range Rover 4.0SE, eGas multipoint, a project.....

Proud to be a member of the YCHJCYA2PDTHFH club.


Top
 Profile  
Reply with quote  
PostPosted: Thu Aug 20, 2015 8:48 pm 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 2916
Location: Yorkshire
And, err, where can you still buy a gallon of 5star?

I thought the tetraethol lead played a part in upping the octane of 4 star. I do miss admiring how well my engine was running after a long drive by checking the grey exhaust!

Simon

_________________
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240


Top
 Profile  
Reply with quote  
PostPosted: Thu Aug 20, 2015 9:19 pm 
Advanced Member

Joined: Wed Apr 09, 2008 9:00 am
Posts: 7856
Images: 0
Location: Peterborough
Already told you, from your local airfield......

It'll cost you about £2.50 a litre though!

_________________
'96 Saab 900XS, AEB Leo, sold
'93 Range Rover 4.2 LSE, Lovato LovEco, sold
'98 Ex-Police Range Rover 4.0, Singlepoint AEB Leo, my daily motor
'97 Range Rover 4.0SE, eGas multipoint, a project.....

Proud to be a member of the YCHJCYA2PDTHFH club.


Top
 Profile  
Reply with quote  
PostPosted: Thu Aug 20, 2015 11:02 pm 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 2916
Location: Yorkshire
Don't doubt you Gilbert mate, I did know aviation fuel was higher octane, but is it to 5 star spec with the lead etc? I know current unleaded is brewed to a higher octane than 4* was before the lead was added too..

No more energy in the MGB's 5* as in 2*, better performance must have come from higher compression / more ignition advance? We can do the compression and advance trick with LPG too (higher octane than 5*), but then LPG doesn't have quite as much energy as (any grade) petrol...

One of the last cylinder head (gasket) jobs I did was on one of my old GV's, anyway at that time I asked the head skimmer bloke to remove X thou from my heads to increase compression to a static ratio I'd calculated. The compression increase would have meant too high a compression for the engine to run at full load on petrol but I wasn't concerned about that and reckoned the SC would have been fine on LPG, increasing mpg and power. I was talked out of it by the head skimmer who told me at the time that removing more metal might weaken the heads or cause valve clearance issues (which I doubt). Looking back,I don't fully believe him, don't think he wanted the work. Wish I'd had the work done elsewhere as an experiment but when my car was off the road and I had the heads to repair it presented on a bench in front of me, which I could simply take away and fit to get the car back on the road, that's what I did. I still aim to modify heads on another car sometime as an experiment though. Problem is, many modern engines have so little valve/piston clearance in the first place, but not the GV.

Years ago I used to mod Ford Pinto heads to 13:1 static compression. With fairly long duration cams they didn't detonate, economy was excellent (didn't breathe well at low rpm but higher compression made up for that), peak power was nearly double standard engine rating. All due to just a bit of head skimming, port work with a dremmel, a 4 branch exhaust manifold and modified distributor. Last one I did was 14 years ago to replace a CVH in a Sierra, felt just as torquey as standard at low loads/rpm (while using less fuel) but went like an XR4 (proper V6 version not the pretending 2L version) at higher rpms.

Simon

_________________
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240


Top
 Profile  
Reply with quote  
PostPosted: Fri Aug 21, 2015 7:55 am 
Advanced Member

Joined: Wed Apr 09, 2008 9:00 am
Posts: 7856
Images: 0
Location: Peterborough
Yup, Avgas has the lead in it too so it is still compatible with older stuff like Austers and Tiger Moths.

The extra grunt in the B came from being able to run more ignition advance, work on the engine internals wasn't allowed so no way of increasing the compression.

I know manufacturers advise against skimming, or skimming more than a certain amount, but it often doesn't weaken the head that much. I know a couple of engines where the way round too much off the heads means you just fit two head gaskets to get the compression down to something that will run and give you back the valve/piston clearance. My P38 engine has had the heads skimmed at least 3 times to my knowledge and runs a consistent 165 psi per pot. Now whether you take off atmospheric so that would be around 150 psi or not I don't know but even then, that would give me a CR of over 10:1. Standard for my engine is 9.35:1 so it has definitely made a difference. I've had to fit 50 thou spacers under the rocker pedestals to stop the hydraulic cam followers bottoming out too (a lot cheaper and easier than shorter pushrods!).

You should take your heads to my local guy. If you told him to skim 50 thou off a head, that's what he'd do. He builds racing Zetec engines for stock cars as well as general machining and quite often is up to his knees in aluminium swarf......

_________________
'96 Saab 900XS, AEB Leo, sold
'93 Range Rover 4.2 LSE, Lovato LovEco, sold
'98 Ex-Police Range Rover 4.0, Singlepoint AEB Leo, my daily motor
'97 Range Rover 4.0SE, eGas multipoint, a project.....

Proud to be a member of the YCHJCYA2PDTHFH club.


Top
 Profile  
Reply with quote  
PostPosted: Tue Nov 10, 2015 8:10 pm 
Installer

Joined: Fri Oct 21, 2005 7:56 pm
Posts: 2578
Location: North Wales
You can also still buy real 4star petrol from a couple of filling stations

_________________
http://www.classicswede.com/
http://www.classicswede.co.uk/LPG/cat17 ... 10800.aspx

LPG installer Anglesey North Wales

DIY LPG Kits

07824887160


Top
 Profile  
Reply with quote  
PostPosted: Sat Nov 21, 2015 9:47 pm 
Installer

Joined: Wed Sep 29, 2010 5:01 pm
Posts: 2916
Location: Yorkshire
Old thread but having a read-about....

I used to get great satisfaction from admiring the grey inside rim of my cars exhausts after a long drive back in the day.. Not running too rich or burning oil, shame to ruin the look on short drives later :lol: Tetra-ethyl, magic stuff for petrol helping make cars viable back then, octane boost and valve protection from same thing, shame about the birth deformities etc...

Simon

_________________
Full time LPG installer
Servicing / Diagnostics / Repairs to all systems / DIY conversion kits supplied with thorough tech support
Mid Yorkshire
2 miles A1, 8 miles M62,
http://www.Lpgc.co.uk
Twitter https://twitter.com/AutogasSimon
07816237240


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 13 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group