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#30
by
R.O.R-2.0
on 08 May, 2012 10:47
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I just finished talking to TechTonics Tuning. They are very knowledgeable about all the possible combinations of parts for gassers and diesels. They are double-checking TDI valve dimensions with the goal of putting together a complete package of valves, guides, seats, retainers, and springs for this head. These guys really know their stuff.
Steve
sorry, but i dont think techtonics knows half the info that we know..
they are hot rod gasser guys..
why do you think you need bigger valves?
the AAZ valves havent even proven to be a restriction yet..
why not build something, run it, then decide you need this, that, and the other crap..
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#31
by
Jetmugg
on 08 May, 2012 11:01
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Who said anything about bigger valves?
The TechTonics guys know which parts work with which other parts. (springs, shims, retainers, valves, etc). They have made a very successful business in the VW world, and have provided parts and knowledge for many current LSR record holders.
Following this thread, there were many good suggestions, but no one was able to say definitively what combination of 7mm valves, springs, seats, retainers, etc. would work without having a machine shop customize some of the parts. It appears that TechTonics is going to be able to provide a complete valvetrain "kit" to do exactly that.
The reason I want to do show up and run as strong as I can afford to run is that the Bonneville Salt Flats are not exactly right around the corner from me. The Salt Flats are over 1,000 miles away. They have a couple of meets per year if the weather cooperates. This is not like bracket racing at your local dragstrip.
When the time comes to run, I need to be ready to run as hard and fast as I can afford to run. There is no "I'll see how it does then come back next week/month". I'm gathering as much knowledge as I can to make the best decisions I know, with the goal of setting a Land Speed Record in 2013.
Steve.
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#32
by
carrizog60
on 08 May, 2012 11:17
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1Y engines use 8mm stems i think...
and for a goal of 120hp i dont think why all the trouble...
my 1.6 had almost that at the wheels with just the basic tunes...
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#33
by
Jetmugg
on 08 May, 2012 11:32
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The Great White Dyno will not lie. It will tell me if I have put enough power to the surface to overcome the aerodynamic drag. When the power output is at it's max, and the aero drag is at it's max, the vehicle won't go any faster. That's when I'll know if I have built a good enough vehicle and a strong enough drivetrain.
There are not many people on the planet who currently hold land speed records with diesel engines. As far as I can tell, the only GTD user who has played a role with a current recordholder is Under PSI. The team he mentioned holds multiple LSR records with a variety of gas and diesel VW powerplants.
If I can make more HP than needed to set the record from a 1.5L diesel, put it all to the ground, and run 3 miles with my foot held to the floor, I will be extremely happy.
I will be disappointed if I can't hit the mark, but I will know that I have given myself every opportunity I could afford.
What I don't want to happen is to invest a lot of time and money, only to come up a little bit short of a record, knowing that I didn't do everything that I could have to go just a little bit faster.
I don't have any illusions that this will be easy. Every detail needs consideration. I intend to build the best chassis and cage that I can build. I intend to take every legal aerodynamic advantage that I can take. I intend to have the best safety equipment that I can buy, beg, or borrow. I intend to build the best drivetrain that I can afford to build.
Steve.
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#34
by
rallydiesel
on 08 May, 2012 12:11
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If you are going to be pedal to the floor for 3 miles I would also recommend an oil cooler (air to oil) and ditching the oem oil "warmer"
.
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#35
by
Jetmugg
on 08 May, 2012 12:22
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A nice big oil cooler is definitely part of the recipe, along with a water-to-air intercooler and a big tank full of icewater.
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#36
by
R.O.R-2.0
on 09 May, 2012 11:26
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A nice big oil cooler is definitely part of the recipe, along with a water-to-air intercooler and a big tank full of icewater.
that ice water is going to be luke warm before the end of the first mile, and probably about boiling by the time the run is over..
why not use a light, simple, air to air intercooler?
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#37
by
Jetmugg
on 09 May, 2012 11:50
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Icewater to air setups are pretty common at Bonneville, including for use on "Long Course" vehicles (5 measured miles and a 2 mile shutdown area) with engines making 20X the horsepower that I will be able to muster.
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#38
by
Alcaid
on 09 May, 2012 13:41
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7mm, 36mm, 95.5mm, AAZ intake valve: 028109601C
7mm, 31mm, 95.5mm, AAZ exhaust valve: 028109611E
And all the other parts numbers you need are in the the part catalog (ETKA)
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#39
by
Jetmugg
on 09 May, 2012 13:56
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Thank You, Alcaid. I will download the EKTA information when I am at my home office this evening.
Steve.
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#40
by
R.O.R-2.0
on 09 May, 2012 18:04
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Icewater to air setups are pretty common at Bonneville, including for use on "Long Course" vehicles (5 measured miles and a 2 mile shutdown area) with engines making 20X the horsepower that I will be able to muster.
my biggest issue, is with the ADDED WEIGHT associated with the 30 gallons of water, and all the pumps/lines/heat exchangers
a BIG air to air, MIGHT weigh in @ ~20lbs..
a TINY air to water, MIGHT weigh in at 30-40 lbs.. and if you use lots of water/ice, like will be required for a long run, its gonna get HEAVY..
but then again, arent you supposed to weigh a certain amount? maybe the added weight wouldnt be a bad thing at all, maybe you could use the weight to better balance the vehicle..
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#41
by
Jetmugg
on 09 May, 2012 18:52
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A lot of people add serious weight to LSR cars (like a thousand pounds of lead in the frame rails) for stability and traction. There is generally no penalty for added weight.
Frictional force (traction) = Normal Force (weight) x Coefficient of Friction (tire on salt surface). If you can't increase the coefficient of friction, increase the Normal Force (weight).
This is not a drag race. It's a top speed contest over 3 miles. The vehicle will come to equilibrium between the applied HP and the aero resistance, probably within the first mile, but definitely before the end of the 2nd mile. The rest of the time, it's just HP against drag.
High HP and low drag (rolling and aero) wins the day.
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#42
by
Jetmugg
on 14 May, 2012 15:43
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TechTonics has all the goodies, and my order has been placed. 7mm valves, guides, seals, lightweight coated lifters, and the entire spring kit are on their way.
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#43
by
RabbitJockey
on 14 May, 2012 19:33
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woot woot
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#44
by
Jetmugg
on 14 May, 2012 20:02
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It's only money.