Anyone here promoting or running the 19:1 CR philosophy? - page 2 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.
-
#15 by Turbinepowered on 11 Aug, 2009 20:51
-
So if I were to make a frankenmotor.. Living in Canada what Could i do for winter starts? Good starter, wires, Gp's and battery?
will it suffice when i need it to start on a -15c day? I mean like i hear of some people having troubles with just a normal 1.6... What do you guys think? I would have to plug it in?
Prolly plug it in and maybe run an intake air grid heater, timered with your glow plug circuit? Cummins uses them, as do several other big engine manufacturers.
I don't really have to worry about cold start issues around here, coldest we get (for maybe a day) is -5C...
Usually our winters are 3-7C, honestly.
-
#16 by Rabbit on Roids on 11 Aug, 2009 22:38
-
So if I were to make a frankenmotor.. Living in Canada what Could i do for winter starts? Good starter, wires, Gp's and battery?
will it suffice when i need it to start on a -15c day? I mean like i hear of some people having troubles with just a normal 1.6... What do you guys think? I would have to plug it in?
in a word...
YES!
lol -
#17 by klang on 12 Aug, 2009 07:49
-
50 psi eh?
how you gonna hold that head down?
how ya gonna keep the gasket from shooting out the side of the head?
i talked to some people on here, about my 2.0 audi (same engine as yours, minus one cylinder)
and they told me it could run 40 pretty reliably. but not with a stock head gasket or bolts.
I'll take some pics of my modifications of the block... =)
And I'm not the first to run at 50 PSI on these engines, but people are also full of ***, thats why I have a spare block
Are you sure the BMW M21 is Audi? Your not talking VAG? (I know its a VAG forum, but I like my BMW =)
And I'm not planning on running at 50PSI all the time, everyday. Everyday boost will be around 40PSI. With electronic controlled boost/boostcontroller.
My clutch is going to leave my at 800NM anyway.
Ive run 27PSI in my standard 1,6GTD.
Ive run around 30 PSI in my standard M21D24. (Then I added loads of Methanol+Water, and the *** went boom@43PSI)
Still, I cant tell you if its going to work, but I know atleast one guy running at 50PSI today, and the finnish guys run mercedes engines at 50PSI. (Youtube Mynä Diesel)
http://www.youtube.com/watch?v=ep-soNJ8D8Y&translated=1
Or do it this way http://www.youtube.com/watch?v=qcDztfFXPww&translated=1
And this is a album from a swedish guy who drives at 50PSI with the same engine as me: http://www.helgonet.ath.cx/album04
// klang -
#18 by Rabbit on Roids on 12 Aug, 2009 10:29
-
with 50 psi of boost, you are going to need LOTS AND LOTS AND LOTS of fuel to even make that boost work for you. and your cylinder pressures are going to be off the charts. what compression are you going to run? cause if you run 50 psi with roughly enough fuel for 30 psi to burn clean, its you will be making more power with the same amount of fuel and less boost. i used to run 30-40 in my rabbit 1.5, with almost no black smoke ever. had it just barely over stock fueling. then i turned down my boost to 20 psi , intercooled it and upped my fuel so it smoked like a freight train. way way more power than with 40 psi. i could never pull 3 gears of rubber with 40 psi.
and yea, im pretty sure BMW used the D24 also, just like volvo. just a 1.6 and a half. and if they did use the D24, then my audi engine will bolt right into your car. all the 5/6 cylinder engines had the same bell housing pattern. -
#19 by burnt_servo on 12 Aug, 2009 12:49
-
your comparing apples to oranges here .
just because one engine will do 50 psi boost DOES NOT mean another engine will reliably run at 50 psi .
the other problem you will run into , any turbo that will give decent spool up will be off it's map and overspooling at 50 psi and will eventually self destruct .
one of the bigest reasons the old mercedes can run very high boost pressures .... they have a cast iron head , which allows a more even clamping force onto the head gasket ......
anyways , i thought this was a vw forum , and a thread on boost pressure in the vw engine ?50 psi eh?
how you gonna hold that head down?
how ya gonna keep the gasket from shooting out the side of the head?
i talked to some people on here, about my 2.0 audi (same engine as yours, minus one cylinder)
and they told me it could run 40 pretty reliably. but not with a stock head gasket or bolts.
I'll take some pics of my modifications of the block... =)
And I'm not the first to run at 50 PSI on these engines, but people are also full of ***, thats why I have a spare block
Are you sure the BMW M21 is Audi? Your not talking VAG? (I know its a VAG forum, but I like my BMW =)
And I'm not planning on running at 50PSI all the time, everyday. Everyday boost will be around 40PSI. With electronic controlled boost/boostcontroller.
My clutch is going to leave my at 800NM anyway.
Ive run 27PSI in my standard 1,6GTD.
Ive run around 30 PSI in my standard M21D24. (Then I added loads of Methanol+Water, and the *** went boom@43PSI)
Still, I cant tell you if its going to work, but I know atleast one guy running at 50PSI today, and the finnish guys run mercedes engines at 50PSI. (Youtube Mynä Diesel)
http://www.youtube.com/watch?v=ep-soNJ8D8Y&translated=1
Or do it this way http://www.youtube.com/watch?v=qcDztfFXPww&translated=1
And this is a album from a swedish guy who drives at 50PSI with the same engine as me: http://www.helgonet.ath.cx/album04
// klang -
#20 by Rabbit on Roids on 12 Aug, 2009 13:08
-
cast iron heads and blocks inherently hold more booost. dont the mercs have more head bolts too? more head bolts would fix our vw's.
-
#21 by MJF on 12 Aug, 2009 13:19
-
Most Mercedes have aluminium heads. And om606 will make over 420hp@23psi, no need to huge boost. Also, no need to lower compression from stock.
-
#22 by burnt_servo on 12 Aug, 2009 13:50
-
Most Mercedes have aluminium heads. And om606 will make over 420hp@23psi, no need to huge boost. Also, no need to lower compression from stock.
anything pre 1985 was cast iron -
#23 by Rabbit on Roids on 13 Aug, 2009 10:24
-
in thinking that we only ever need about 35 psi max to these engines. if we cant make our desired power at 35 psi, then we need to tweek and tune. or get bigger nozzles
-
#24 by Turbinepowered on 13 Aug, 2009 10:54
-
in thinking that we only ever need about 35 psi max to these engines. if we cant make our desired power at 35 psi, then we need to tweek and tune. or get bigger nozzles
I dare say that should say better nozzles. You need to be able to burn all the fuel you're dumping in, and if it's just a massive single-hole nozzle that's not gonna happen very well. Big smoke no love.
Seven hole nozzles for an IDI?
-
#25 by zukgod1 on 13 Aug, 2009 11:18
-
I don't have time for a huge reply right now but I was able to touch 40 psi on my original build, ARP Studs, Metal HG.
I used a 3 notch gasket when it called for a 1 notch and installed slightly larger pre cups.
Later I installed a 1 notch Metal HG and still ran around 25+ regularly. 11mm pump btw...
Need to add it ate 2 turbos.. They were WAY over speeding at those levels. Good thing I had a FMIC to help catch some of the turbo parts that flew through.
-
#26 by Rabbit on Roids on 13 Aug, 2009 12:24
-
in thinking that we only ever need about 35 psi max to these engines. if we cant make our desired power at 35 psi, then we need to tweek and tune. or get bigger nozzles
I dare say that should say better nozzles. You need to be able to burn all the fuel you're dumping in, and if it's just a massive single-hole nozzle that's not gonna happen very well. Big smoke no love.
Seven hole nozzles for an IDI?
why dont they make nozzles that have tons of little holes? you would think it would atomize way way better than one or a few bigger holes. -
#27 by burn_your_money on 13 Aug, 2009 14:37
-
why dont they make nozzles that have tons of little holes? you would think it would atomize way way better than one or a few bigger holes.
They do. They are used in low compression gasoline engines
They are also in the intake.
Atomization isn't the only thing you need to worry about. The rate of the burn directly effects noise levels as well as the stress put on the crank/rods etc. The mechanical advantage of the crank is very low near TDC. It's at it's peak half way down the bore. -
#28 by Turbinepowered on 14 Aug, 2009 07:29
-
why dont they make nozzles that have tons of little holes? you would think it would atomize way way better than one or a few bigger holes.
They do. They are used in low compression gasoline engines They are also in the intake.
Atomization isn't the only thing you need to worry about. The rate of the burn directly effects noise levels as well as the stress put on the crank/rods etc. The mechanical advantage of the crank is very low near TDC. It's at it's peak half way down the bore.
They are also in TDIs. One of the big things holding diesel power back is adequate mixing, so separating your fuel streams into more, finer streams can help you get a better, more consistent and mixed burn. -
#29 by cyrus #1 on 14 Aug, 2009 12:34
-
Quote from: Turbinepowered
They are also in TDIs. One of the big things holding diesel power back is adequate mixing, so separating your fuel streams into more, finer streams can help you get a better, more consistent and mixed burn.
This is all very true. Do you think we could unlock the full potential using a VE pump though? I would think that accurate timing and possibly multiple injection events would become important when using nozzles with several holes...