Let the tinkering begin...

[Greg Roles]

For the record, it seems that at around the same time as the stock water temp gauge shows 90 degree operating temp, the oil temps start to register, and this morning it took about three minutes to get the water temp up, and then about another 3 mins to reach the 80 degree mark for normal driving in the Golf.

So oil temps take approx twice as long as engine coolant temps, but once the water is up to temp, the oil has some heat in it, and the pressure / viscosity starts to drop to normal levels.

[Greg Roles]

[greygolf8]

was just flicking tv channels & noticed on abc New Inventors 2 guys from Dungog talking about injecting lpg into diesel engines for better economy & perfomance. called gastek ?, costs about $5k. its bolt on. did not really give more details, apart from it uses some feedback to control/vary the lpg injection. Thou their website only shows 4wd / utes, no vw tests

http://www.abc.net.au/tv/newinventors
http://www.gastek.com.au

[Greg Roles]

was just flicking tv channels & noticed on abc New Inventors 2 guys from Dungog talking about injecting lpg into diesel engines for better economy & perfomance. called gastek ?, costs about $5k. its bolt on. did not really give more details, apart from it uses some feedback to control/vary the lpg injection. Thou their website only shows 4wd / utes, no vw tests

http://www.abc.net.au/tv/newinventors
http://www.gastek.com.au

Yeah mate, propane injection isn't anything new, but perhaps these guys were injecting it directly into the cylinders rather than a "dry" intake feed as per usual. The aforementioned Diesel book outlines some interesting points there. LPG will burn more effectively with the diesel, and in fact burn faster thus using up all the oxygen for a better bang and thus power output. Basically a second fuel, but good old "Banksy" ( from the book ) points out it's hard to work out which is effectively burning, and what is being wasted with dual fuels. Problem is they reckon the diesel kinda gets "wasted" and the LPG pre-ignites in pockets and doesn't give a controlled burn. All that said it still produces quite a power increase, but so too higher exhaust temps, and our oil cooled turbo's especially with VNT are quite vunerable there.

Also, now that the gov has a $2k rebate on the fitment of LPG, well all the install prices have gone up...wait for it....$2k.

WAS my plan, but I'm researching "other" gasses now.... the Diesel tuning book is truely EVIL

[comfortline]

Also, now that the gov has a $2k rebate on the fitment of LPG, well all the install prices have gone up...wait for it....$2k.
:

Noooooo, they wouldn't have done that would they?

Brother had problems with gas on this VQ statesman, takes it into a place to get fixed...

Long story short, they put in a whole new system, which cost...wait for it....3.5K

Got to love rebates....straight into the pockets of business.

[gldgti]

WAS my plan, but I'm researching "other" gasses now.... the Diesel tuning book is truely EVIL

hydrogen? i would think that hydrogen would prove to be a good addition to a diesel combustion process - clean too.... so long as you can get it by some efficient means (and not running power out of the grid)... got panels on your house maybe

i've been wondering if maybe a DIY setup using some off the shelf items could be cobbled together, inlcuding one or two of those propane refill canisters you can buy at the hardware store... you know, just for those few occasions when you want some extra oomph.

[Greg Roles]

Nitrous mate! I still can't rule out propane, for it's legal, and a lot cheaper. ANY of these choices are a ways off as yet, but I'm doing a lot of research. I'll definately go down one of these roads, if not only to silence those damn TSI'ers.

Still up in the air about the water intercooler idea, the book and the yanks seem to frown on it, and it appears heatsoak is the issue. Research continues, but currently want to get the EGT hooked up asap. Following oil temps and pressure has been educational, and I can report the oil sits at 80-90 degrees in the sump, which is around engine coolant temp, so my idea of boosting the oil cooling doesn't seem quite as necessary for now. With mods and higher turbo temps possibly, that may change!

[572]

Greg, do you think the 'fan on intercooler' theory could be applied to those of us with side mount intercoolers, with good results? As opposed to fitting a sizable front mount intercooler kit.

Sorry to go slightly off topic, but I need to pick your brain

[Greg Roles]

Absolutely, but only if you included a water mister in front of the cooler as well. Pulling air across a wet cooler would be a huge boost in efficiency. I am planning on measuring temps across my stock cooler in the next few days, then plumbing in my Autospeed coffee pump mister, and seeing if there is a measurable difference. I would expect so. Also you'll get nice small, lightweight fans from a motorcycle wrecker, one off a large road bike would be ideal. You want high flow, and a smallish motor body to take up as little room on the cooler as possible.

Ideally hook the fan up to a pressure switch, so it only runs when your speed is low, and it can then just freewheel at speed. If it's running, at 100kph, it would probably be a restriction at a guess.

Also make sure the side mount has good inlet and especially outlet air flow. I'd also consider insulation on the pipe from the cool side to the manifold, even if only at any potential "hot" points, near the engine etc. I plan on wrapping the entire cool side once I'm done.

Maximise what you have! Autospeed had a GREAT test of various wrecker intercoolers, so might be worth having a look if any of these jap items would be a possible, more efficient, cheap upgrade for the Polo. Perhaps even in series with the stocker. Remember a bigger cooler will be more efficient, but will also add volume and drop boost. You're trying to offset any volume boost loss with enough increase in air density to make it worthwhile.

http://autospeed.com/cms/article.html?&A=1931

http://autospeed.com/cms/article.html?&A=1946

[Greg Roles]

Water sprays:

http://autospeed.com/cms/search/inde...ercooler+spray

Intercooler fans:

http://autospeed.com/cms/search/inde...ntercooler+fan

Autospeed is your friend!!