? for J.W. or similar porsche guru

[gr8fl4porsche]

I am still searching for the answer to the following:

When you floor the accelerator, should the throttle be 'wide open' meaning at the end of its travel?

'87 911 trying to get a little attitude.

Thanks for all the great advice and tips to all of you who really know the answers.

Randy

[APKhaos]

Yes.
A number of threads earlier this year covered this topic - surprising how many cars were mis-adjusted so that a fully depressed pedal gave less than full throttle opening.

Full pedal should give you full travel at the throttle body.

[A Quiet Boom]

Yup,

After a month of ownership (and wondering why my car fell flat on it's face a 4500rpm I discovered that my throttle only opened 2/3 of the way when the pedal was floored. A quick adjustment and the car needless to say was WAY faster. I adjusted mine the old fashioned way, with the car off put a brick on the pedal and adjust the linkage until the throttle is all the way open. I'm sure this isn't the most elegant way but it does work.

[gr8fl4porsche]

Thanks for the help!

Everyone should check their throttle movement.
Mine was nowhere close to wide open.

[PDACPA]

Does anyone have a picture of the the throttle adjustment in the engine compartment? I guess the brick on the gas pedal would be my method too. Just want to check it too.

[john walker's workshop]

it's amazing how many cars have been running around at 2/3 throttle for years. just like adding 50 hp.

[Rick Lee]

Now this has me wondering. My car accelerates just fine and I usually take it to 6000 rpms with plenty of room left under the pedal. But, of course, I'd always like to get more response, if it's available.

[wckrause]

I'm wondering too. Can you tell how open the throttle is from the outside of the throttle body, or do you need to look inside?

Where is the adjustment to the linkage made?

[gr8fl4porsche]

The 2 adjustments I made were at the pedal cluster under the gas pedal and the linkage that attaches to the throttle body.
Its quite simple and self explanitory when you look at it.

Put a brick on the gas pedal or wedge a short pole between the pedal and the seat to floor it - with the car turned off!!!
Go back to the motor and see if you can open the throttle any more by hand - I was quite surprised that mine was short by almost an inch.

The difference is very noticeable

[PDACPA]

Gr8 - Does Wayne's book have a picture of the throttle in the engine compartment? Just prefer the visual so that I can make sure I am adjusting the right thing!

[PDACPA]

John Walker - Adding 50HP? LOL you mean it feels like that LOL

[gr8fl4porsche]

The best pic I found was on page 65 of the Parts and Technical reference catalog.

[Roland Kunz]

Hello

On every regular Inspection you have to check if the throttle works correct and apply some lube if needed or renew the bushings.

If a car without full way appiers it shows lack of attention and you know that costumer will return and praise you as his car acceleratet much better after the inspection

Grüsse

[PDACPA]

I looked at my throttle today. With the gas pedal fully depressed (broom handle pushing it down with the power seat pushed forward to hold it in place) the throttle lever is pulled back but still has a bit more to go (it you pull it back towards the back of the car it will go back a little more).

My problem is this:

The cable is not tight against the throttle lever. It is sticking through it and the end of it is more towards the front of the car.

If i twist the black plastic housing that is threaded it moves back and forth but does not seem to tighten the cable that is through the throttle.

Correct me if i am wrong, the throttle cable should be tight against the metal throttle arm and the metal throttle arm should be pulled all the way back when the pedal is fully depressed.


If I am correct, how do you adjust/tighten the cable so that it pulls the throttle lever all the way back? The twisting of the plastic holder on the end of the black VDO cable does not seem to move the cable.

Thanks

[Early_S_Man]

CPA,

Referring to p. 65 diagram ... have you looked at #5 bushings for the bellcrank at the pedal assembly, or #15 at the transaxle bellcrank?

Have you inspected the four #2 ball socket ends (two at pedal assembly, one at transaxle, one in engine compartment) for play or adjustment? All of them should be cleaned thoroughly and lubricated with anti-sieze compound! If the THREE throttle rods are adjusted towards minimum length ... slack WILL be taken up. Pssst ... there are no cables shown on p. 65!

[Superman]

A friend once complained that her car lacked power compared to her memory of how much power it used to have. I reached in and pulled the floor mat back so it was not bunched up underneath the gas pedal. "All in a day's work ma'm."

[PDACPA]

Early S - p 65 of what Bentley? (No copy yet only of Wayne's) so I need a picture if anyone has one.

Superman, mats are held out of the way of all pedals with straps attached under the seat.

[layzee]

Just to chime in, when we bought our car it had this problem. I suspect this is why the PO wanted to sell it - not as fast as he expected. Well it was easily fixed and now it has that 'pushed back in the seat' feel that we all know and love

[Early_S_Man]

CPA,

Parts and Technical Reference Catalog ... as referenced by Gr8 above!

The play at the throttle rod at transaxle bellcrank ('Reversing Lever') is specified as 1-2 mm. Below is exerpt from WKD 490 921 '911 Carrera DME Test Plan,'

[john walker's workshop]

the aforementioned "cable" is the cruise cable. leave it alone. it's supposed to have some slack.