Soft throttle pedal on Porsche 924S/944: why, and how to fix it

If the throttle pedal on a Porsche 924S or 944 feels soft in the first third of travel, especially after a modern car, that is the stock geometry doing what it was designed to do. It is not worn cable stretch. A short-throw wheel addresses it for around €45, without opening the engine, without special tools, and fully reversibly.

Why the pedal feels soft

The culprit is the throttle wheel (sometimes called the throttle cam) mounted on the throttle body. It's the round piece the accelerator cable wraps around. Its shape defines the relationship between pedal angle and throttle-plate angle.

On the stock 924S and 944, this wheel is cut with a progressive curve: through the first 30 to 40% of pedal travel, the throttle plate barely opens. Only past that point does the opening rate increase.

Porsche chose that geometry in the 1980s for two reasons:

• Comfort a soft first third of pedal travel makes the car easier to modulate in traffic and less nervous for an inattentive driver.
• Era constraints emissions standards and injection mapping designed for an average foot, not a driver pressing on.

The result today: on a healthy car the engine responds, but the feel of acceleration lags the pedal. You press, little happens, then you press further and opening arrives in a rush. That is the cam as drawn, not a fault.

Progressive curve vs. linear curve

A short-throw throttle wheel replaces the progressive cam with a near-linear profile. Concretely:

• Total travel stays the same pedal to the floor still means wide-open throttle.
• But the distribution changes. The first few millimetres of pedal now actually open the plate, and the rest scales proportionally.
• The "dead zone" at the start disappears.

Put differently, you do not gain opening at the top: travel is redistributed toward the bottom. The plate starts opening as soon as the pedal moves.

What this isn't

A few things to rule out upfront:

• It's not a power gain. Your engine makes the exact same horsepower. You're changing how you command the opening, not what's behind it.
• It doesn't touch the injection, the DME, or the throttle body itself. No electronic parameters are modified.
• It's fully reversible. Two nuts and the original wheel goes back on in ten minutes.
• No impact on technical inspection or emissions. The part doesn't change emissions, safety, or the car's homologation.

Fitment: check before you buy

This is the most important point. The throttle wheel isn't the same across the entire 924/944 range.

This short-throw wheel fits:

• Porsche 924S (all years)
• Porsche 944 8-valve naturally aspirated (the "base 944")

It does not fit:

• Porsche 924 (earlier model, different linkage)
• Porsche 944 Turbo (951)
• Porsche 944 S (16-valve)
• Porsche 944 S2

Simple rule: if your car uses the mechanical throttle body with the cable wrapped around a round wheel on the intake side, it's compatible. Turbo, S and S2 use a different linkage.

If in doubt, compare your throttle body against the photos in the installation guide linked from the product page, or send a photo and we will confirm fitment.

Installation: about 30 minutes

The full procedure with photos is in our step-by-step installation guide.

No special tools. What you need:

• 2× 13 mm open-ended spanners
• 1× 19 mm open-ended spanner

The main steps:

1. Loosen the lock nut and free the cable sleeve.
2. Unscrew the stock wheel.
3. Fit the short-throw wheel, re-tension the cable to the same setting, tighten the lock nut.

A minor idle or cable-slack adjustment may be needed afterwards nothing beyond normal accelerator-cable maintenance.

What changes on the road

Once fitted, the differences show up on every drive:

• More direct pickup out of corners. The plate starts opening as soon as the pedal moves, instead of waiting for the second third of travel.
• Finer control on descents and on back roads. You can hold a small throttle opening without pressing further than needed.
• Clearer low-speed work. Junctions, short overtakes and cold starts are easier to judge.
• More linear spirited driving. Opening tracks pedal position more closely.

What you will not feel: more power, a better 0–60 time, or different fuel consumption. This is an ergonomics change, not an engine modification.

Available in our shop Short-throw throttle wheel for Porsche 924S 944 €45

Frequently asked questions

Does it add power?

No. Engine output is strictly the same. What changes is the feel of acceleration and the precision underfoot because pedal travel is redistributed, not because the engine pushes harder.

Is it reversible?

Yes, completely. No permanent modification: refit the original wheel. Keep it if you ever return the car to stock.

Is it suitable for daily driving?

Yes. Daily driving is where the change is most useful. In town the pedal is easier to judge for manoeuvres and short overtakes. On the motorway, past the first third of travel, the command is the same as stock.

Does it fit my 944 Turbo / 944 S / 944 S2?

No. Those models use a different throttle linkage. The short-throw wheel is designed for the 924S and the 944 8-valve naturally aspirated only. If you're unsure which model you have, the product page has reference photos of the compatible throttle body.

Do I need to re-adjust the idle afterwards?

Not usually. The short-throw wheel doesn't change the closed position of the throttle plate, so idle stays set. Just check the cable slack after installation, as you would for any routine accelerator-cable service.

Going further

If you are working through a set of small modifications, see 5 affordable modifications for Porsche 924S/944.

For a fitment question, contact us before you order.