I have built my 2nd prototype engine, in a bluebird wagon.

It has stock carbie, stock cam, plugs are 3 heat ranges up.

I have matched and slightly enlarged the ports.

The valves are thinner that normal and i have found there resistance to reverse is flow is better than a typical valve with 3 angles at low lifts.

I have been jumping on the gas today and here is a short file.

Its a 4 cylinder can anybody make guess what my Peak RPM is?

I can hear the engine accelerating a lot faster above ~6000 RPM

I think its up around 8000 RPM.

added pitch shifted files 5/10/2005

reving high2.zip

Sound likes an air tool pitch/time shifted in some audio software.

Do you even own a car?

Thanks for the comments

Sound likes an air tool.

pitch/time shifted in some audio software.

Do you even own a car?

The only adjustment was to increase volume by 500% then a futher 289%

I am using some walkman headphones cost $1.00 at crazy clarks

I was using a small speaker before but it runs of of dynamic range.

I have 2 licensed cars atm.

here is a previous recording (sorry for the clipping and using server space)

PS the cam is too advanced and the ignition static timing is as 5 ATDC

so thats 13 degrees less than recomended.

I know its sounds hard to Believe, but im trying to do something that has not been done before, correct me if im wrong please

5 ATDC jumping on it engine hot.zip

please elaborate on what exactly you are doing that has not been done before, i would love to hear about it

When I fully understand what is going on I wont have much time to spare

some details

I read on the net somewhere that someone (aka smokingwheels has) will make an Internal Cumbustion Engine that is fired when the piston is on the down side.

Thus ive found you can have really high compression ratios

My 1st engine had a chamber volume of 33 cc ~11.5:1

My 2nd 38-39 cc ~ 10.5:1

My 3rd engine hmm a diesel engine converted to fuel ~20:1

Have a look sum of my results at www.smokingwheels.myphotoalbum.com

Sum of this data was the first attempt in 2002

I had a program which I used and wrote in MS QuickBASIC that timed the spark, with a little interface to the printer port of a computer, Pic is loaded on this site

I only found out last month that spread sheet was out by a factor of 2* in its calculation for the timing, thus the engine didnt go very good until you hit 3000 rpm.

When above 3000 rpm the maximum total advance to stop knocking needed to be 3-4 degrees btdc this was confirmed with timing light, so that also says there was no load on engine.

I have done simlar tests on as std engine you can advance ~20 up before it starts knocking with no load.

It also used to foul plug at a alarming rate and 3 heat ranges up, eg maybe 1000 km

STD plugs well i was lucky if i got 30 mins.

I replaced everthing electrical but still not much better

In the end I reduced the compression to ~8:1 and rewrote the program to work better.

I then got another 8 Months out of this engine before the conrod bearings when again, i did a shifty repair used 20" and 30" shells.

anyway im still scraching my head now

but not pulling my hair out anymore

What I am failing to understand is what is "prototype" about your engine? It seems all you are doing is modifing timing, spark, ECU, compression ratio and valve angles. Then you mentioned something about firing the piston on the downside- what does that mean? When the piston is on the stroke heading down? On the intake or power stroke? Unless you are altering the way the engine works, it's nothing more than modified- not a "new" engine.

Dave

He's firing the charge ATDC. Sounds like trying to pee up a rope to me.

Any comments would be Appreciated

I think you are playing in the wrong sandbox for your age/iq.

Ok well sounds like you guys are not intrested or dont belive what you are reading that ok

I will post more results a lot later on

After Ive finshed working on a Friends V8 sum 6700 cc of an airtool

Now thats sum airtool to play with it has got the usuall performance mods

But before i go and have more fun think about this Pic

No fancy timing light just a 1 sec exposure on a cam

note: if i retard the timing any more i cant see the mark in the pics

I would like to hear anybodys engine rev at that setting.

Ps: where would i buy a L20 B block that could put out 600 Kw for my head

cheers

Did the Garbage Bag test today.

yep measured how long it took to fill one with exhaust fumes.

I think it was a 40L bag

my normal 2L engine at idle filled the bag in approx 11 seconds.

my modified engine at idle filled the bag in approx 5 seconds.

the modified engine was running slightly faster than the normal engine though

at a guess it was in the order of 100 rpm faster

i will need to correct this and then do more tests

hmmm that engine sucks

Sound likes an air tool pitch/time shifted in some audio software.

Do you even own a car?

i'm with you.

Can't see his posts anymore (ignore list). Dude's got issues!