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> Guess how many HP in a 1975 1.8 ..., Got a dyno test
johannes
post Jun 29 2010, 03:11 AM
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I have a 1975 1.8 (California car with catalytic converter)
It came out of the factory with 72,5 HP (from owner's manual)

The converter has been removed and the original muffler has been replaced with a Bursh.
As far as I know the rest of the engine is stock and still has the L Jet injection.

Your guess ?


https://www.youtube.com/watch?v=jmcFB1p7HFw
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Spoke
post Jun 29 2010, 03:51 AM
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Well, you got no downhill advantage...80hp?
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BarberDave
post Jun 29 2010, 04:02 AM
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(IMG:style_emoticons/default/smilie_pokal.gif)


My guess is 90.5 ????? Dave (IMG:style_emoticons/default/slap.gif)
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jimkelly
post Jun 29 2010, 04:32 AM
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40 ?
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johannes
post Jun 29 2010, 04:59 AM
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QUOTE(jimkelly @ Jun 29 2010, 02:32 AM) *

40 ?


Good eyes, but those figures on the screen are not HP but KW (IMG:style_emoticons/default/biggrin.gif)
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balljoint
post Jun 29 2010, 05:16 AM
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55hp. (IMG:style_emoticons/default/sad.gif)
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veltror
post Jun 29 2010, 06:08 AM
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1,8 = boat anchor
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6freak
post Jun 29 2010, 07:25 AM
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what ever it is! its not enough....
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pillay2k
post Jun 29 2010, 07:29 AM
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is it ever enough?

65hp..?
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TravisNeff
post Jun 29 2010, 07:34 AM
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12!! (IMG:style_emoticons/default/laugh.gif)
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johannes
post Jun 29 2010, 07:40 AM
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What you see on the screen is power at the wheel.
At about 4800 rpm the guy shifts to neutral.
The curve goes backward under zero to record the power absorbed from the gearbox so power at the flywheel can be calculated.
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tod914
post Jun 29 2010, 08:09 AM
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I can't read the meter, it's in French. (IMG:style_emoticons/default/tongue.gif)
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Cupomeat
post Jun 29 2010, 08:16 AM
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Great looking car, BTW! Looks just like mine, LOL!

So, what was the verdict?

The suspense is KILLING ME! (IMG:style_emoticons/default/headbang.gif)

40 kW is approximately 53.6 hp, then if you assume 15 % loss in drive train, which might be reasonable, you get about 61.64 hp.


Is that the answer?
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johannes
post Jun 29 2010, 08:29 AM
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Can't wait ?

Here is the answer !!!

79 HP at about 4500 rpm. From 4500 torque begins to decrease and power stays at level.

(BTW SPOKE, your guess was the closest)

Gain of combined "no Catalyst converter" + "Bursh Muffler" is 6,5 HP ...
Could be a few more with a new engine and better tuning. No miracles with thoses "sport" mufflers.

This is the muffler I have on the car.

Attached Image
Picture from Pelican Parts Website

I bought this 914 as it is now. I didn't made any changes. The engine is supposed to have low compression pistons (did not mesure it). It also stil has those 1975 very restrictive heat exchangers.
2.0 SS heat exchanger could be an improvement for an extra 3 or 4 HP but that is a lot of money for this poor result.

...
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Cupomeat
post Jun 29 2010, 08:34 AM
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NICE! 79hp is a good figure for a stock 1.8!

Congrats!

Eric
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underthetire
post Jun 29 2010, 08:51 AM
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QUOTE(johannes @ Jun 29 2010, 07:29 AM) *

Can't wait ?

Here is the answer !!!

79 HP at about 4500 rpm. From 4500 torque begins to decrease and power stays at level.

(BTW SPOKE, your guess was the closest)

Gain of combined "no Catalyst converter" + "Bursh Muffler" is 6,5 HP ...
Could be a few more with a new engine and better tuning. No miracles with thoses "sport" mufflers.

This is the muffler I have on the car.

Attached Image
Picture from Pelican Parts Website

I bought this 914 as it is now. I didn't made any changes. The engine is supposed to have low compression pistons (did not mesure it). It also stil has those 1975 very restrictive heat exchangers.
2.0 SS heat exchanger could be an improvement for an extra 3 or 4 HP but that is a lot of money for this poor result.

...



Actually, percentage wise, 3-4HP is pretty good!
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Krieger
post Jun 29 2010, 08:53 AM
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Well it sounds like a lot more! At least 150 horses running wild.
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kerensky
post Jun 29 2010, 08:57 AM
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What's more important - what does your 'butt dyno' tell you? (IMG:style_emoticons/default/smile.gif)
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Root_Werks
post Jun 29 2010, 08:58 AM
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That's not a bad figure at all I think.

(IMG:style_emoticons/default/driving.gif)
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johannes
post Jun 29 2010, 09:09 AM
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