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> Weird (?) Dyno Results, 4-banger, Can this be legit?
MikeInMunich
post Jan 1 2015, 07:48 AM
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Can a few of you veterans out there please offer feedback regarding this dynograph?

This is new to me, but I am skeptical here. (IMG:style_emoticons/default/confused24.gif)

Thanks!

Mike in Munich


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Jon H.
post Jan 1 2015, 08:01 AM
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QUOTE(MikeInMunich @ Jan 1 2015, 05:48 AM) *

Can a few of you veterans out there please offer feedback regarding this dynograph?

This is new to me, but I am skeptical here. (IMG:style_emoticons/default/confused24.gif)

Thanks!

Mike in Munich

I agree for some reason the HP numbers are higher then I thought they would be (IMG:style_emoticons/default/biggrin.gif) .

Joking aside, that would be disappointing given the money you've invested in the engine. Was this dyno done at the wheels?

Jon h.
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JStroud
post Jan 1 2015, 08:28 AM
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Doesn't look bad, 95hp for a 2.0, wasn't stock only around 80, thats 15 over stock.
Doesn't a 2056 only put out 110-120hp.
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EdwardBlume
post Jan 1 2015, 08:44 AM
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Low HP motor with high torque? Interesting configuration.

I'm guessing from your personal description the chart is from your 1.8 converted to 2.0.

Do a search under dyno and Jake Raby for comparable posted numbers, but its all in how you built your motor.

How does it drive?

Happy New Year!
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MikeInMunich
post Jan 1 2015, 09:20 AM
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The P&Cs add up to about 2.0. Stock cam, mega squirt, MSD electronic ignition, OBX headers. I have not driven it yet but my man on the job says it is indeed "torquey".

I receive another image of the graph with RPM instead of MPH. I've read that the torque and HP lines are supposed to insect at 5220 RPM. This is not the case here. One statement posted by a member read that if they don't the test is bogus or something to that affect. (IMG:style_emoticons/default/confused24.gif)

M.i.M.
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MikeInMunich
post Jan 1 2015, 09:21 AM
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QUOTE(JStroud @ Jan 1 2015, 06:28 AM) *

Doesn't look bad, 95hp for a 2.0, wasn't stock only around 80, thats 15 over stock.
Doesn't a 2056 only put out 110-120hp.


Pretty sure a stock 2.0 puts out about 100.
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MikeInMunich
post Jan 1 2015, 09:23 AM
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QUOTE

I agree for some reason the HP numbers are higher then I thought they would be (IMG:style_emoticons/default/biggrin.gif) .

Joking aside, that would be disappointing given the money you've invested in the engine. Was this dyno done at the wheels?

Jon h.


I don't know where you got any idea about how much I've invested in this engine Jon. The car had it as is when I bought it. I've only invested in the ignition and headers.
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rnellums
post Jan 1 2015, 10:07 AM
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My understanding is you lose a minimum of 15% off your power going through the transmission. If this is wheel power, Maybe it isn't far off?
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BeatNavy
post Jan 1 2015, 10:29 AM
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QUOTE(MikeInMunich @ Jan 1 2015, 10:20 AM) *

I've read that the torque and HP lines are supposed to insect at 5220 RPM. This is not the case here. One statement posted by a member read that if they don't the test is bogus or something to that affect. (IMG:style_emoticons/default/confused24.gif)

That's my understanding (albeit limited). Based on the definitions of HP (work, or power over time) and torque (power), at ~5200 RPM they have to equate, by definition and math. But I don't really understand how dynos work. I've seen several graphs and the HP and torque lines always do seem to intersect at 5200.
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MikeInMunich
post Jan 1 2015, 01:03 PM
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QUOTE(rnellums @ Jan 1 2015, 08:07 AM) *

My understanding is you lose a minimum of 15% off your power going through the transmission. If this is wheel power, Maybe it isn't far off?


Yes, this is at the wheels, putting output over 90 HP, but we're not seeing the intersection that must be there, mathematically. Also, this motor should be putting out at least 100 HP, or at least we believe it should be. If it's correct we're losing about 10 HP somewhere for some reason.
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r_towle
post Jan 1 2015, 01:08 PM
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Sorry, I don't see RPM,s on this graph.

Stock camshaft, 1.8 heads, it will lose air at the top end and wither away in power fast from what I have seen.

Rich
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MikeInMunich
post Jan 1 2015, 05:04 PM
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QUOTE(r_towle @ Jan 1 2015, 11:08 AM) *

Sorry, I don't see RPM,s on this graph.

Stock camshaft, 1.8 heads, it will lose air at the top end and wither away in power fast from what I have seen.

Rich


Here is the graph with RPMs. So the heads (and the cam, I knew that) are the weakest link(s). There's a lesson for ya, P&C upgrade to 2.0 ain't doin' (IMG:style_emoticons/default/stromberg.gif) without the top end being upgraded as well. Veterans, please resist to comment "duh" and the like. We all gotta learn the hard way sometimes. (IMG:style_emoticons/default/headbang.gif)


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r_towle
post Jan 1 2015, 05:09 PM
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It's an air pump.
The best money is spent on heads and camshaft.

You may be able to squeeze out a bit more if he changes you over to chomoly push rods, rocker arm shims and sets the valve train geometry properly.

That can all be done without taking the whole motor apart.

It will starve out for air, just as you see it.
That is physics, valves, ports, exhaust.....

Rich
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messix
post Jan 1 2015, 05:29 PM
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loosing every thing starting at 4,200 rpm is really weird.

did you monitor the ignition curve and af/r through out the dyno run?

is this d-jet or l-jet?

some thing is dumping the power way too soon.

I would double check ignition timing and then. and the af/r

this looks more like what a bus motor might look like.
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krazykonrad
post Jan 1 2015, 06:38 PM
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Are you sure you don't have bus heads on this engine?

Konrad
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edwin
post Jan 1 2015, 07:10 PM
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Are you sure you're reading the graph correctly?
I'm reading that you have 76hp at the wheels and 96ft-lbs torque.
Has anyone ever tuned the mega squirt or is it just auto tuned?
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messix
post Jan 1 2015, 07:42 PM
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mega squirt.....

are you dropping in fuel pressure in the higher rpm?

what injectors are you using?

you need to data log on the dyno to figure this out.

I don't see a 1.8 or 1.7 head dumping this much on a 2.0, maybe on a 2.5L+

it's a nice toque curve at first, just getting starved for timing or fuel 4k+rpm
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Jon H.
post Jan 1 2015, 08:02 PM
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QUOTE(MikeInMunich @ Jan 1 2015, 07:23 AM) *

QUOTE

I agree for some reason the HP numbers are higher then I thought they would be (IMG:style_emoticons/default/biggrin.gif) .

Joking aside, that would be disappointing given the money you've invested in the engine. Was this dyno done at the wheels?

Jon h.


I don't know where you got any idea about how much I've invested in this engine Jon. The car had it as is when I bought it. I've only invested in the ignition and headers.

Sorry, I assumed you did the the re-build.

Jon H.
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CG-914
post Jan 1 2015, 08:11 PM
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QUOTE(MikeInMunich @ Jan 1 2015, 10:21 AM) *

QUOTE(JStroud @ Jan 1 2015, 06:28 AM) *

Doesn't look bad, 95hp for a 2.0, wasn't stock only around 80, thats 15 over stock.
Doesn't a 2056 only put out 110-120hp.


Pretty sure a stock 2.0 puts out about 100.



All cars had more hp in other countries especially in Europe...
This is because of less good gas and different emission laws in the USA and especially in CA.

This was mostly done by lower compression in the engines for the US market:
914 2.0 had 7.6:1 compression in the US and 8:1 everywhere else, the Result:
88hp in the USA and 100hp in Germany.

Cornelius

Hamburg and USA
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MrLeeS
post Jan 1 2015, 10:19 PM
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Data logging the run should be standard nowadays. I had a chassis dyno in my shop for 3 years and always ran a wideband just to give the customer something useful from their runs. First thing I'd look at in your case is the throttle and make sure it's opening all of the way. Your graph is a classic example of not enough air flow. And at 2 liters this smaller valves heads shouldn't be pulling you down that much at the top end.

Also, it is obvious the Tourqe and hp are headed for the 5250 intersection, if you can get there.

Good luck.
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