A Simple Solution to a Worldwide Crisis

[ehnriko]

This will be a good test because the engine has been running for two years with ported heads. The grooves are the only change made.

The squish clearance will also remain the same as before the grooves were cut. The block was zero decked when the engine was built. The same thickness (0.040") head gasket will be used.

Kerry races a 80's model Camaro with a mild flat top 355 and a flat tappet cam. The engine has been running great; times in 11.0's at 122 mph.



A broken rocker arm stud prompted a rebuild. Kerry's only complant is the oil gets black after 20 runs. He heard about the grooves and asked if they would help.


The burn pattern was good but ended about 1/2" before the bore on the opposite side of the plug. I believe this is the area where conditions for combustion are unfavorable resulting in unburned fuel passing the rings. With the grooves this problem should be eliminated. The fluid flow during combustion created by the groove will initiate more heat during the early stages of combustion. The resulting faster hotter flame combined with mixture motion in the squish region will create a condition that is favorable for combustion all the way to the bore on the opposite side from the plug. This will eliminate the raw fuel that is being blown past the rings.

Read more: http://somender-singh.com/content/view/45/25/



I ported the heads when the engine was first built, during the rebuild the ports and chambers were cleaned with a sandpaper roll and the grooves were cut.



Cylinder Head Volume 60 cc
Piston Head Volume 5 cc
Gasket Thickness 0.040"
Gasket Bore 4.160"
Cylinder Bore Diameter 4.030"
Deck Clearance 0
Stroke 3.48"
COMPRESSION RATIO 10.845:1

Isky solid flat tappet camshaft
Part No. 201547 Grind 547-A
RPM range 3000-7000
Duration * 0.050" 254°/259°
Lift 0.547"/0.548"
Transmission T350 w/8" converter

[ehnriko]

The owner of this awesome Corvette convertible was awarded No Problem Raceway "Driver of the Year" for the 2005 racing season. His wheel standing Corvette, running grooved LT1 cylinder heads, capped off the season with a win at the Christmas race in the Non Electronics bracket.

Congratulations




More Details Coming Soon



This was an interesting project.
A 1965 corvette convertible, 2600 lbs with a
generation II LT1 small block from the late
90's. The engine has been bored and stroked
to 383 CI. It has a modified tuned port
injection with an aftermarket computer
controlling the fuel and spark. With a three
speed automatic it leaves the line on the
back two wheels carrying the front wheels
for 40 to 50 feet.
The benefits of the groove were immediate.
Reduced fuel consumption

Improved idle quality

Lower ET and more MPH

"The one thing that impressed me the most is how the oil runs clean. I'm changing it because it's time, but it looks like the day I put it in!"

[ehnriko]

FAQ: What do the Groves do?

"Without grooves, the combustion is incomplete and unburned fuel remains in the cylinder. This unburned fuel is still expanding during the exhaust stroke; with the engine idling at the end of the exhaust stroke the expanding unburned gases flow past the intake valve into the intake manifold causing poor idle.

With the grooved cylinder heads combustion is more complete leaving little unburned fuel behind, more of the fuel is used to generate power and less is used to generate heat. (That’s also why the engines run cooler). With the modified heads little or no unburned fuel remains during the exhaust stroke. With less unburned fuel to expand during the overlap period the gasses flowing past the intake valve are reduced resulting in improved idle quality."

[ehnriko]

FAQ: What kind of tools do you use to make the grooves?

How do you know how deep to make them?
How long to make them?
And Where to put the grooves on both two strokes and four strokes?


ANSWER:
The first grooves were started with a jewelers saw and finished out with a small triangular file.

The depth is dependent upon creation of a straight shot from the plug to the squish area.

Length is also.

Usually in symmetrical orientation. Every engine is different and research will need to be done on all scales. Grooves may be added and benefits received until a certain point. Next time do one less.

[speed unlimited]

FAQ: What do the Groves do?

"Without grooves, the combustion is incomplete and unburned fuel remains in the cylinder. This unburned fuel is still expanding during the exhaust stroke; with the engine idling at the end of the exhaust stroke the expanding unburned gases flow past the intake valve into the intake manifold causing poor idle.

With the grooved cylinder heads combustion is more complete leaving little unburned fuel behind, more of the fuel is used to generate power and less is used to generate heat. (That’s also why the engines run cooler). With the modified heads little or no unburned fuel remains during the exhaust stroke. With less unburned fuel to expand during the overlap period the gasses flowing past the intake valve are reduced resulting in improved idle quality."

I agree on this and can save fuel because it is burn properly. Its just like people now a days put a lot of modification on there car To gain a lot of horsepower not knowing if not tune properly is not worth the money they spent.

[ehnriko]

Another Simple Solution - without changing your ICE engine... just a little modification probably on the timing... and some additional parameter adjustment to your ECU and an additional Low Pressure or Hi Pressure fuel tank.


Personal Hydrogen Filling Stations for the Home

[ame="http://www.youtube.com/watch?v=Iw70ocGBsLc"]YouTube - Personal Hydrogen Filling Stations for the Home[/ame]

[ghosthunter]

And who is going to pay to setup the hydrogen station in your garage?

Not to mention hydrogen by volume is less than half the energy density as gasoline. High pressure insulated tanks will fill up the entire rear end of a typical sedan but only have half the range of a full tank of gas.

So if you have a Corolla converted to hydrogen, it will only seat two people (driver included), only have the range to drive 100 to 125 km on a single tank of hydrogen and have the cargo space to carry a only single bag of groceries.

And this doesn't include the problem and cost of making, compressing and storing hydrogen before pumped into the vehicle.

This is a "solution" which some people haven't really thought through well enough. Some countries can afford it because they are compelled by certain national or international clean air treaties or similar.

[ghosthunter]

Think people.

If hydrogen is such a "simple solution", why hasn't the first world countries implemented this so-called "simple solution" beyond the experimental scale?

[niky]

I've heard of these, a long time ago.

Apparently does help cool down the combustion chamber somewhat, and on older engine designs, can increase power a little, if done right. Seems to work best on old two-stroke engines.

For modern designs with "swirl" already built into the air flow from the intake valve, probably not so much... and there's a possibility that you're trading operating temperature for increased thermal stress on exposed sharp peaks on the groove edges, which may cause hot-spotting and eventual eating away of the surface.

It'd be interesting to see how a grooved two-valve combustion chamber compares to a more modern four-valve chamber. If the grooves work as well as promised, it could mean cost-savings in manufacturing engines... use less valves, less moving parts, and use the grooves to increase efficiency.

What I haven't seen, though, is data on how grooving affects NOx emissions... that'll be the interesting part... and lower EGTs may interfere with catalytic light up, a big issue, considering cats are required in western countries.