who running on svo cooking oil?

[Fez_uk]

do you run separate fuel feeds from the engine bay (supply and return) to the 2nd tank?

 

[Deleted account DD]

If you google "what causes piston ring gumming up" you will find nearly 2 million related links.

Out of those I read (about 2 pages worth) not one was related to svo.

Im not saying in any way that svo wont cause gumming, what i am saying is because that one article has been unearthed it doesnt mean svo is the gumming anti christ of the automotive world.

The last engine i dismantled and had cruddy rings was an 1800 cvh ford engine ie petrol. If engine oil doesnt contribute to gumming up where had it come from on that? as previously mentioned oil does make its way into the upper part of the piston bore on any car.

Diesel isnt warm when it first kicks off, nor is petrol. Why is svo any worse ??????

Its more likely that the lack of detergents in svo contribute to accelerated gumming up.

All of those points are very very very basic engine factors.

 

[Deleted account DD]

sorry i no that gumming will happen but what i was trying to say is that in twin tank the veg oil will never be cold sorry didnt word it correctly:thumb2 but single tank on vegie will gum more than twin tank vegie .think thats better put was never any good at english as u can tell.:lol

no problem with your terminology Im questioning some of your theory :thumb2

any unburnt cold fuel from pigs piss to avtur has the potential to cause problems.

If you use an electric preheater in conjunction with a water heat exchanger you will have warmer svo from kick off.

Therefore no difference to the viscosity and atomised fuel going through the injectors be it cold normal diesel or warmed svo.

Its long been recognised that the lack of lube or detergent in svo can POTENTIALLY cause problems.

 

[Deleted account DD]

do you run separate fuel feeds from the engine bay (supply and return) to the 2nd tank?

No need to run seperate feeds. So long as the switch. Solenoid or manual works! One i worked on had a feed from the diesel tank and the svo tank at the rear to a solenoid then forward from there on the existing line.

Didnt even consider the return , I presume it went into the old big tank. I wouldnt have thought it would upset anything to leave it standard :nenau

 

[geoffdown]

do you run separate fuel feeds from the engine bay (supply and return) to the 2nd tank?

no just feed

 

[geoffdown]

no problem with your terminology Im questioning some of your theory :thumb2

any unburnt cold fuel from pigs piss to avtur has the potential to cause problems.

If you use an electric preheater in conjunction with a water heat exchanger you will have warmer svo from kick off.

Therefore no difference to the viscosity and atomised fuel going through the injectors be it cold normal diesel or warmed svo.

Its long been recognised that the lack of lube or detergent in svo can POTENTIALLY cause problems.

yes gumming come when fuel is not atomised correctly if the petrol engine is not running how it should do that will cause gumming as will if the diesel is ot atomised due to poor injector but svo is thicker than diesel so thats y u run on diesel first the oil when warm ,with a big heat exchange and electric in line heater u will still have cold svo in the ip and most importantely the injectors so more risk of gumming when burning cold hard to atomised svo compared to cold easier to atomised diesel that to me seams like good theroy to me but thats me making it as safe as i can for my truck i also dont like the ip straining on cold thick svo when starting but every1 to their own.:thumb2

 

[Deleted account DD]

This article that seems to have caused such a flap http://www.vegetableoildiesel.co.uk/forum/viewthread.php?tid=8020
is articulately written by somone who clearly has a decent understanding though it lapses almost into a business case for a twin tank system.

It is flawed as his opinions take no account or explain why all engines get the dreaded gum and the practical element is based on one engine strip. The rest is theoretical.

The parameters of that engine were not discussed. Had the thermostat been knackered and it had ran at a low temp? how many miles? what had it been ran on prior? what engine lube had been in? how often had it been changed?

I reckon, and its why i used millers and 2 stroke (which still brought it in cheaper than derv) , its the lack of detergents svo that could cause the problems, but then you know that when you lob it in.

Even so theres no hard comparative evidence to support that

 

[(RIP) PLANK]

I think the best argument in this has been from Daved, and you know we don't always see eye to eye. Did i read somewhere that this problem is associated with the use of synthetic and semi synthetic engine oils, and is less of an issue with mineral oils?

 

[geoffdown]

I think the best argument in this has been from Daved, and you know we don't always see eye to eye. Did i read somewhere that this problem is associated with the use of synthetic and semi synthetic engine oils, and is less of an issue with mineral oils?

i am not sure if hes 100% correct i will keep using my system as i know it releaves the strain on ip when starting with cold svo in the system but you forget i run on pure diesel every morning so i do get the deterants from that cleaning things out as some people have said before else where on here with single tank running 100% svo u still have to start with cold svo in the ip and injectors but not with a twin tank i am ot selling anything so not promoting twin tank i will just be here if peeps need any help on the matter i bought all my thing from diff people of ebay and found the bits cheaper thats all:thumb2

 

[(RIP) PLANK]

i am not sure if hes 100% correct i will keep using my system as i know it releaves the strain on ip when starting with cold svo in the system but you forget i run on pure diesel every morning so i do get the deterants from that cleaning things out as some people have said before else where on here with single tank running 100% svo u still have to start with cold svo in the ip and injectors but not with a twin tank i am ot selling anything so not promoting twin tank i will just be here if peeps need any help on the matter i bought all my thing from diff people of ebay and found the bits cheaper thats all:thumb2

I wasn't disregarding your point of view, just agreeing with the 'all engines gum up eventually' bit. I am sure it is to a greater or lesser degree depending on how you go about it :thumb2

 

[solarman216]

Well just my thoughts on the matter, if you are running twin tanks, then you need to make sure the return goes to the correct tank, but also if you want to start on derv in the morning you will need to switch to derv a few minutes before you shut down for the night or your pump will be full of whatever it is in the second tank, I do not think I could be doing with all that messing around, Rick

 

[makeitfit]

All the more reason for bio
However there is a three way auto switching gizmo that does all that return to the right tank thing so no big deal really. Just remember as you say Rick to switch to diesel before bed

 

[zippy656]

would running deisel one tank in 4 make some diference, help clean the inside?

 

[geoffdown]

Well just my thoughts on the matter, if you are running twin tanks, then you need to make sure the return goes to the correct tank, but also if you want to start on derv in the morning you will need to switch to derv a few minutes before you shut down for the night or your pump will be full of whatever it is in the second tank, I do not think I could be doing with all that messing around, Rick

hi well u dont have a return to the small tank in the boot when running on diesel the return gets looped back to the surply line then when u switch to veg oil it returns to the same tank it cam from as makeit fit says you just flick a switch 1-2miles before bed:thumbs

 

[geoffdown]

would running deisel one tank in 4 make some diference, help clean the inside?

u have to be care full as u have a heat exchanger on a single tank which means if u filled up with diesel, diesel would be going through the heat exchanger and u dont want to heat neat diesel up too much as it loses it lub propties and thats bad for the ip

 

[Deleted account DD]

i am not sure if hes 100% correct i will keep using my system as i know it releaves the strain on ip when starting with cold svo in the system but you forget i run on pure diesel every morning so i do get the deterants from that cleaning things out as some people have said before else where on here with single tank running 100% svo u still have to start with cold svo in the ip and injectors but not with a twin tank i am ot selling anything so not promoting twin tank i will just be here if peeps need any help on the matter i bought all my thing from diff people of ebay and found the bits cheaper thats all:thumb2

Im not claiming to be 100% correct, farrrrrrrr from it.

The main advantage of a twin tank system seems to be that cold diesel, ie at the viscosity the engine is designed to run on, means smoother cold running. Makes sense.

Progressing that point though raises the question how can you replicate the viscosity of diesel with svo particularly from cold. The answer seems to be that different engines will tolerate different ranges of viscosity. The T2 seems pretty cool with a wide range so hot running isnt a problem.

However the logical answer to cold starting is either use diesel ie twin tank or heat the svo ie electric heater supported by a properly installed water heat exchanger.

I cannot find any evidence (including that flawed article) to demonstrate as opposed to express an opinion , that a twin tank will prevent gumming. It will no doubt be more efficient than a heater on its own for very cold starting of course but does it make that much difference over and above other potentially cheaper measures, I dont KNOW and nor does it appear any one else :thumb2

I am open to be persuaded it does though :thumbs

 

[Deleted account DD]

would running deisel one tank in 4 make some diference, help clean the inside?

yes :thumb2

 

[Deleted account DD]

and you know we don't always see eye to eye.

:naughty:naughty:naughty:naughty:naughty

Did i read somewhere that this problem is associated with the use of synthetic and semi synthetic engine oils, and is less of an issue with mineral oils?

I seem to recall that too, not sure of the details :thumb2 I was told years ago that regular changing of oil using a decent quality can reduce gum and sludge for minimum effort :thumb2

 

[Deleted account DD]

if you want to start on derv in the morning you will need to switch to derv a few minutes before you shut down for the night or your pump will be full of whatever it is in the second tank, I do not think I could be doing with all that messing around, Rick

That comes with the kit instructions :thumb2

however theres a very easy way to deal with at least some of the human factor for just a few quid if youre using an electrical solenoid.

All you have to do is wire in a thermostat so it switches over once the engine reaches a certain temperature. For pre shut down (and this is back to manual operation) you put an override switch into the circuit to switch back to diesel. Once youve switched off the ign switch the switch back so once you start up next its back to auto.

still a faff but only about 50% of previous plus takes the guess work out of switching onto svo :thumb2