Has anyone had any problems converting the 4afe to diesel? I have a buddy Jack who is raising the compression to 19:1 so he can run on waste oil.
I told Jack I didn't think it would work so good but that isn't stopping him. I'm sure someone has done this, because of all the v-8 diesel conversions done in the 1980s.
He wants to drive for free.
I didn't think it was possible to turn a gas engine into a diesel... the compression ratio's are nuts on diesels. Like the jetta I have is 30:1 I think it's something insane like that lol
Better off to just ride a bike and grab a hold of bumpers...
Seriously, the diesel engines I have seen have many differences to make them work, too many for a practical conversion.
he's just better off buying an old vw, not just taking the engine. they don't have sparkplugs but you could probably fill those holes with the glow plugs diesels have. But you know I would think a diesels block would have thicker walls and so fourth. Because a diesel aluminum block that is smaller that the 4A block weighs more (I have a 1990 vw jetta, turbo diesel). you would need high compression pistons, if they made them for such a high compression for the 4afe engine. everything inside would have to be flawless because your clearences would have to be so close... just... not worth it lol. Buy the jetta. But even with the turbo they only have 63 hp. They are more roomy and have a larger trunk than the corolla's. Only car I've seen that is front wheel drive yet looks like it has the rear wheel drive trans, just because it's so long.
not only the hight compression rates but the temperatures. Most diesels run at extremely high temps to facilitate the burning of the diesel fuel. THey have to have the high compression to get the heat built up where it needs to be. Just converting a gas engine to diesel is not going to be very cost effective. The entire fuel system will have to be replaced, the injectors will not work taht come with the Corolla because they do not operate at high enough pressures either. You will need some kind of injection pump to pressurize the fuel before it is injected into the cylinder. MOre than likely the bottom end of the engine is not going to hold up either. Those little 4A's were not meant to run at that high of compression and will do some pretty good damage probably.If you go with some kind of Electronicn diesel injection then you are going to have to have an ECU to control it. If you go with mechanical pump then you ahve to mount it somewhere nad then figure out some kind of chain or gear setup to run it off of the engine.
The list goes on and on as to what would probably need to be done to make it work.
As for diesel to gas conversions inthe 80's. most of those were people that tok the diesels engines out of their cars and then dropped a SBC in instead.
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Chris
PLEASE DO NOT GET RID OF THE OLD TN AS WE KNOW IT.
fuel likes will have to be made of steel for diesel. My jetta doesn't have many rubber lines because of the presure everything has to be at. If that V8 thing is true, about converting to diesel. a 80's V8 block is alot more beefy than a 4afe engine, since weight didn't seem to be much of an issue back then for those cars and trucks.
I had completely forgot about the higher temp that diesel's run at, good point Cyorke
Actually diesels run cooler than gasoline engines, Ever wonder why diesel cars suck during winter
Only way to convert a gasoline engine to diesel efficiently is to swap in a toyota 2C or 1C engine. Too much work for a 4A-FE to be converted.
Actually diesels run cooler than gasoline engines, Ever wonder why diesel cars suck during winter
Only way to convert a gasoline engine to diesel efficiently is to swap in a toyota 2C or 1C engine. Too much work for a 4A-FE to be converted.
they do run ALOT hotter than gas engine! They suck in the winter because their oil is so thick to begin with that when it gets cold it's more like a gel than anything and it makes it hard for the engine to crank. The fuel also does the same thing which is why you have to add conditioner after a certain temp otherwise forget starting the car.
After the car is started withing 10 min all the snow is melted on the hood and if you have the heater running all the snow is melted on most of the car too lol.
they do run ALOT hotter than gas engine! They suck in the winter because their oil is so thick to begin with that when it gets cold it's more like a gel than anything and it makes it hard for the engine to crank.
No they actually dont, the exhaust gas temp is on average 200C cooler than a gasoline engine, they suck in winter time, because the temperature of the coolant doesnt reach that high of a temp. Fuel gelling problem isnt an issue, we have "winter grade" diesel in finland, which goes down to about -40C and light oil can be used such as gasoline cars.
No they actually dont, the exhaust gas temp is on average 200C cooler than a gasoline engine, they suck in winter time, because the temperature of the coolant doesnt reach that high of a temp. Fuel gelling problem isnt an issue, we have "winter grade" diesel in finland, which goes down to about -40C and light oil can be used such as gasoline cars.
Yeah he's right exhaust temps on a diesel are almost half the gas engine temps. Lots of people i know have burnt out probes for diesels on their gas powered cars for the EGT gauge.
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1986 Mazda Rx7, was base n/a model, now a 290rwhp, pos monster
1991 Corolla LS, 5spd. Sold
1995 Toyota Tacoma, 3" Lift, Bilstein HD's up front 5051's out back, 265 75 15 Toyo OC A/T's.
2009 Toyota Corolla "S" Magnetic Grey, and oh sooooo Stock.`
the diesel engine runs great after you get it started. it sucks in the winter because of the fuel and oil getting thicker. it's alot easier to ignigite something with a spark in the cold then it is with thick ass oil and trying to compress it. A block heater and some diesel conditioner will fix that problem.
now I am not sure whats up with this... but everything I have ever read about the diesel says it runs hotter than the gas engine. Fuel/air mixture will ignigite at 250 deg C, where as with a diesel that is what you want to do! http://www.clubb5.com/b5beat/article...k_is_tdi.shtml
"a small quantity of fuel is injected to raise the trap temperature to as high as 1100°F, incinerating the soot in about 15 minutes, according to Gary Smith of General Motors Powertrain Division." http://www.popularmechanics.com/auto...tml?page=3&c=y
doesn't take much to light gas fumes on fire. diesel on the other hand if you throw a lit match into a container of it the match will hit the diesel and go out :p
Now maybe the exaust temp is lower, not sure how but maybe. I have a diesel jetta and I am telling you it warms up faster than my corolla does! just saying that because flashmn said something about how the diesel engine running cooler makes them run shitty in the winter. The exaust manifold alone on my vw is at least twice the thickness of the 4af engine's. Maybe the newer tdi engines have lower exaust temp... but that might be because their exausts have more to go through. also make sure you are comparing engines of the same size.
Everything on the diesel is thinker because of the violent explosion when the fuel combusts, anything that is that unstable when compressed is bad. Kinda like lograde nitro Gliserin. Kinda but not really.
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1986 Mazda Rx7, was base n/a model, now a 290rwhp, pos monster
1991 Corolla LS, 5spd. Sold
1995 Toyota Tacoma, 3" Lift, Bilstein HD's up front 5051's out back, 265 75 15 Toyo OC A/T's.
2009 Toyota Corolla "S" Magnetic Grey, and oh sooooo Stock.`
Now maybe the exaust temp is lower, not sure how but maybe. I have a diesel jetta and I am telling you it warms up faster than my corolla does! just saying that because flashmn said something about how the diesel engine running cooler makes them run shitty in the winter.
My friends Diesel Vento has an electric heater element parallel to the heatercore, to make it "nicer" in winter time, however the gauge rarely goes even up to 90 on normal driving from what I've observed. I think the Jetta (american version of the vento) has the same heating element there.
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Everything on the diesel is thinker because of the violent explosion when the fuel combusts, anything that is that unstable when compressed is bad. Kinda like lograde nitro Gliserin. Kinda but not really.
Its not that violent, anything volatile is gonna be unstable when you compress it, diesels just are made to ignite the fuel by heating the air up when you compress it and then spraying the diesel into the combustion chamber at the correct moment to ignite it, its still controlled operation, unlike detonation in gasoline engines. Mainly the reason is that you only compress the air, not diesel and air mixture.
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