Acceleration of and engine against time

[jackboxxx]

ok well ive got 2 engines of the same size but different mods

If i compare the noload acceleration rates i might have sum idear of power output.

But would'nt you ummm want a load to test power output? if you want a true

reading...

[smokingwheels]

True but that will cost a few $$ which i dont have

I dont have a job atm.

so im looking for sum sort of relitave figure

[panchovisa]

I wish tomohawk was here to transmutate this for us.

[smokingwheels]

I ripped the air flow meter out of my z today

stuck it on top of my stock carbie

was able to open air flap in the order on 95% just by cracking the secondarys open wide by hand

with revs in the order of 3000 with no load

I will need to make a better setup, i dont have 5 hands.

so does anybody know how much engine VE% goes up with a hot cam?

[smokingwheels]

ok have a look at this http://www.geocities.com/smokingwheels/index.html

[Grim]

All this info and number crunching is fine and good but what will it do in the real world? Numbers on paper don't win races.

[montoya_fan01]

It was a small load so he did it by hand!

LMAO X 100,000 !!!! (and the best part of his knowledge ended up on a napkin) :pirate:

[Gav240z]

All this info and number crunching is fine and good but what will it do in the real world? Numbers on paper don't win races.

I wouldn't say that.

[smokingwheels]

My reference car is leaking the green stuff between head and inlet manifold

some one has undone the rocker cover bolts again but this time they also undone the manifold bolts as well

most of the bolts were just past finger tight about 1/32 of a turn

I could accept exhaust bolts being slack but not inlet

hmm thinking about getting sum bolts that are used on small aircraft with holes so i can put wires in them

just a minor setback

may wire up a latching relay to a microswitch to energise the horn when the bonnet is opened for when they visit again hehe.

[smokingwheels]

What is he trying to accomplish? And does it really belong here? This isn't a science think tank and the only connection this has with Z cars is that they also have an engine. I can put up with this as long as you all can put up with it. Rock on!

Cheers Sblake

Well i have found out somthing very intresting.

I talking about somthing small and it is a loss.

well just try and change it...its a loosing battle at 4:1

Drive Train Harmonics (DTH) hehe.

After studing the rpm change of my engine on a bang by bang bais.

I have discover how to use excel now hehehe, eg zoom in eg 3K %

Im thinking well i have a primitave fomular thats works in 1st gear.

then ...

How much power is waisted in DTH ? 10 %..20%

How much kinectic energy is waisted with constant acceleration and deccelaration in the order of amplitude of + - 150 rpm in my leaf springs on the diff when my foot is touching metal (Carpet, havent mass reduction yet).

also the DTH frequency increases with gears, due to less grunt i guess.

eg when booting it in 2nd from 4000 rpm

the inital DTH surge lasts for 6 cycles around 3.5 times per second (Hz)

so its __-_-_ but there is smaller cycles there also so higher ones as well..

my current program elimanates 70-90% in 1st gear.

eg noload to full load my engine bounces only 1.25 times the rest is constant power, no bounce bounce bounce bounce .....

thus this might explain the 54 mpg ~~~6 l/100 O and at 100km/h over 160km

but you would have to port your donk as well...

I dont recomend this yet unless you are a poor pensinor like me when time=nothing, fuel = loss of income.

but then you will have to retune your engine when the weather changes

eg temp humidty as well as engine temp ,heat soak across block etc etc

so far so good well i just had to port it again...

some real world settings..

only 20 deg for vac adv on 35 deg day low humidity

only 35 deg for vac on a 20 deg day high humidity

I have found my handy work has a temp coeficent of around 20 degress

my program resolves down to 1 part in 422000 I dont know how accurate it is I mean i would need a reference of at least .00001 deg

so i have a base line 18deg Btdc at 3000 +35 deg btdc for vac down to -300 mm of hg

so at 6000 rpm ~30 deg Btdc + 35@ -300 mm.....

so im putting the fire in the hole ~65 degrees btdc.

If I had an engine running at 20 000 rpm i could put fire in the hole just as the inlet valve is closing hehe..

has that been done before...

with clean ported engine i was running a base line of 90 Btdc@10000

hehe +35 for high vac ='s 125 degrees Btdc

But my timing curve is flat so my torque curve should be flat too ...all the way....

A spark plug in the inlet manifold !!!!!

Go on laught you arse off now hehehehehe.

but im allready using a brain cell on it..

But how would I/someone build such a beast.

One misfire and .... hehe there would be fire and metal everywhere.

Id like to see that on high speed video....

Cheers

Smoking wheels 2007

[smokingwheels]

Hmmmm, Evil genius at work. Either that or they have intenet access at graylands now (joke)

Only if it were true, then i could chat all the time heheh...

Evil genius at work??? well I still have a clean DL so far

well im poor so i cant afford 90 L per 100km.

with a 2L 4 banger or should i say a 180 degree touque pumper.

a 90 degree touque pumper =180L /100km

so displacing mass from equilibrium = some sort of power loss.

when i bend my drive train up = feels good and costs fuel.

but when it fights back = I really feel good and I couldnt care how much fuel is used.

thus:

so keeping the displaced mass constanly away from equilibrium will cost less fuel , keeping the displaced mass away from equilibrium and not letting it more at all so keeping it up there will = gains, may be small, but seems to work in ok 1st gear.

hehe Smoking some wheels was here 2007

[smokingwheels]

All this info and number crunching is fine and good but what will it do in the real world? Numbers on paper don't win races.

Well would you like full peak and constant wheel touque with no bounce bounce .......

eg very little DTH (Drive train harmonic),,=waisted power=loss in kinetic energy..

I know its not much but every bit helps.

I can amplfy it also

eg wheels chirps every 333 ms~ = extreem drivetrain wiplash = 1000 rpms + -

hehehehe, i have done that.

Cheers

Smokingwheels