selfproclaimedv8buff

A friend of mine told me that i could get more horses by having the second throttle open up at the same time the first one does. I noticed that when i'm driving the car has more kick high end which is when that second throttle is opened up. Does anybody know how to do it and if yes is it safe for my engine? I have a '88 Audi 90 2.3 liter 5 speed FWD.

DavidFeygin

Feels like more power at low end, but probably because it is the equivalent of pushing harder on the gas.

dave

Nkugs90

How did that chip work out for you? Do you notice an increase in performance?

BigMouse

It sure does feel like more power, and probably is, but it makes the car really hard to drive. The throttle peddal doesn't go down as far and it is nearly impossible to do a smooth start from a stop. It's also really hard on the clutch because the engine is running at full throttle (pretty much) when you engage it. But it's fun to try, so if you want to...

Put a very small screw with a nut on the other end in the slot on the throttle body that opens the second butterfly. If you look at it long enough, you'll see what I mean. I can't think of a better way to describe it.

MikTip

The trick is not over doing it! ;o)

Its all about finding the right position & time to open the secondary(larger) TB butterfly.

This way the motor is near its bottom end of its powerband, say 3000, when the secondary starts to open.

On the Coupe TB, I epoxy'd in a small piece of aluminum, about 1/8 of an inch in size.

The "screw" method is too much, makes the car too undriveable. Its a very small piece you need to add.

On the 93 90, I run a bored, A4 TB, which came from the factory equipped to open the larger sooner than the TB of a 93-95 90.

Here too, I epoxy'd in a very small piece of aluminum. Its smaller than 1/8 in size.

It makes a very noticable differance.

I ran my Coupe GT this way for years, without any
problems.

So far, my 93 90 likes it, and no problems!

NCFioren

Are you basically just keeping the smaller hole open at all times? You achieved this by placing a piece of aluminum in a way that just held it open?? I cannot really picture it.

MikTip

<center><img src="http://pictureposter.audiworld.com/6607/tbmod.jpg"></center><p>You have to see how the TB mechanical linkage opens the secondary butterfly. Its done by a metal arm which extends down into a plate. In this plate is a channel. I installed a very small piece of aluminum here, which acts to open the larger butterfly sooner. You need to experiment with different sized pieces to get it right.

On the older TB's(4000's CGT's) the channel is much longer, than the 93+ Audi's.

Seems Audi realized the benifits from this one too! )

QCRAZY

Big difference between the 10v and 12v