Adk46

I think the throttle gain my 928 is the lowest of any of my various vehicles. I have to move the pedal a long way to get a nice kick.

The gain is vastly different between the 928 and Cayman (even before hitting the Sport button). It feels like two inches versus a half-inch of pedal movement. Some of this perception would go away if I worked the auto shifter, but not all.

Is there a way to modify it? Move the cable attachment point at the quadrant inwards? Something at the pedal? Anyone done it?

WallyP

I think the throttle design is pretty good - long, smooth and linear. I have never been a fan of the quick throttle, where you get 80% of the available power in the first 20% of throttle movement.

It might feel better on a rogerbox, but real drivers with a real transmission would hate it...

Sure, you could change it by either of the methods that you mentioned.

Speedtoys

Well, it's perfect for it's designed use, a GT car.

It has gain built in as you get into the throttle, look at the setup for it.

It moves slowwwwly at low inputs, quickly in the last half of the throttle travel.

It's not supposed to be a jerky hungry car.

FredR

Curt,

Throttle quadrant plate [or whatever it is called] has a cam effect the way it is cut such that the last section of travel realises a disproportionate amount of throttle opening relative to travel. Thus why the throttle linkage has to be adjusted critically to ensure the throttle can fully open.

Thus there is plenty of "feel" at lower throttle openings and when you want to go for it it is either open or it is not. This is particularly important for a "torquey" motor like the 928. Maybe it is less critical for a "screamer" where you have to be up the rev range to get any real sense of go. The Cayman is not really a screamer as such [ever driven a Honda 2000?] but it is well more in that direction than a 928.

Hard to imagine the 928 throttle action being any better than it is.

Rgds

Fred

NoVector

Just curious if you've adjusted your cables(?) I had my car 5 years before I did it and wow what a difference. I followed Greg Brown's post, post #10. https://rennlist.com/forums/928-foru...justments.html

Adk46

Seems like it is just me, or the car, or both - I'd better get it all adjusted to specifications before making any further complaints!

I certainly have kick-down issues to sort out, which were rising to the top of the list. A harsh shifting issue, too. I'll tackle them all together.

Bertrand Daoust

And don't forget, the transmission cable adjusts shift speed, the modulator adjusts shift firmness.

Bill Ball

Most 928s I encounter have too much slack in the throttle cables, delaying throttle response and often preventing the WOT switch from tripping. You can remove slack at the cable adjuster on the firewall, accessible more easily with the air filter box lid removed. Additional adjustment for the second half of the cable is at the throttle quadrant. Remove nearly all the slack, while verifying that the throttle still returns fully to the idle stop and you can still hear the idle switch "click" as you move the throttle slightly (a few degrees) off the idle stop. If you make any considerable adjustment to the throttle cable, you will need to adjust the bowden cable in automatic tranny cars.

Taipo

I agree with Curt, the throttle body cam configuration makes the car feel dead when compared with my other cars (Jag, Merc). I think I have seen a mod for 944/968 that changes the throttle response.

GlenL

I've got one of those. The 944 has an odd arm that sticks off the throttle that give more control (turns slower) when the throttle is near closed. The mod is a round disk. Came with the car. Doesn't make it faster.

Move the seat up a bit and you'll be able to floor it.

SeanR

Keep in mind that all of the cables are as old as the car and have most likely stretched a bit. On the S4s there are two that I would change. Early ones just have the pedal cable.

MjRocket

Sean, do you happen to know the part #'s on those two cables your speaking of?

I wanna check with Roger on prices.

Thanks brother.

SeanR

Shoot roger an email, he's supplied many of them so he's got it all on hand I'm sure.

GlenL

The cables can be tightened.

SeanR

Sure they can. Until they can't.