Alan Cesar Associate Editor
May 21, 2012 3:37 p.m.

It's not often those words come together in one sentence, but sure enough, David was able to release some horses from his Porsche by disconnecting just one wire. No word on whether it also builds muscle and whitens teeth.

http://grassrootsmotorsports.com/project-cars/1984-porsche-911-carrera/free-porsche-horsepower/

Javelin UltimaDork
May 21, 2012 3:40 p.m.

Wow, that is interesting. That one definitely needs a back-to-back dyno test...

friedgreencorrado PowerDork
May 21, 2012 6:19 p.m.

To the Dynocave, Dynoman!

Seriously, though..that would be really cool if it's true. And I wonder how many other early EFI cars have something similar in their own chips.

David S. Wallens Editorial Director
May 21, 2012 6:19 p.m.

We'll definitely be dyno testing this one.

Keith MegaDork
May 21, 2012 6:47 p.m.

I'm gonna go out to my BMW and start cutting wires to see when it gets faster. I'll let you know.

ditchdigger SuperDork
May 21, 2012 6:59 p.m.
friedgreencorrado wrote: To the Dynocave, Dynoman! Seriously, though..that would be really cool if it's true. And I wonder how many other early EFI cars have something similar in their own chips.

I know that 85 GTI\GLI's had a similar trick. Clip the wire at the knock sensor computer that bridges pins 3 and 11 and it changes the ignition map. It gives 2hp, 5ft/lbs and another 300RPM on the limiter.

Woody UltimaDork
May 21, 2012 7:16 p.m.

Ordinarily, free internet horsepower needs to be taken with a grain of salt, but if anyone knows Porsche DMEs it's Steve Wong.

I've never heard of this before, but I'll tuck this little bit of info into a dusty corner of my brain for when the next 911 rolls into my life.

Keith MegaDork
May 21, 2012 7:19 p.m.

Since it affects the timing, I vote we call this the "retard wire".

friedgreencorrado PowerDork
May 21, 2012 7:46 p.m.

This thread needs more upvotes on David's message saying he's actually taking the thing to the dyno. Isn't this kind of stuff supposed to be what the magazine is all about?

Racer1ab Reader
May 21, 2012 8:04 p.m.
Woody wrote: I've never heard of this before, but I'll tuck this little bit of info into a dusty corner of my brain for when the next 911 rolls into my life.

Me too, but mine's probably a bit further off. Thank goodness for that new Porsche Forza pack!

Raze SuperDork
May 21, 2012 8:30 p.m.

Too bad you can't just data log an ignition wire advance before/after, that'd tell you pretty quick...

May 21, 2012 8:48 p.m.

Later model mercedes 560sl have a similar wire which controls the ignition timing. I guess you pull a resistor and it supposedly increases power but you also have to run premium gas afterward. Maybe it was a resistor to the knock sensor or something, hell if I know.

Good luck with it!

belteshazzar UltraDork
May 21, 2012 8:48 p.m.
Keith wrote: Since it affects the timing, I vote we call this the "retard wire".
modernbeat Dork
May 21, 2012 10:07 p.m.
Raze wrote: Too bad you can't just data log an ignition wire advance before/after, that'd tell you pretty quick...

You can. It's called a "scope".

Raze SuperDork
May 22, 2012 8:36 a.m.
modernbeat wrote:
Raze wrote: Too bad you can't just data log an ignition wire advance before/after, that'd tell you pretty quick...

You can. It's called a "scope".

I was being sarcastic given all the responses asking for a dyno to proove it was working, my response got lost in translation...

You'll need to log in to post.

Also on Grassroots Motorsports

You Need This: E39-Chassis BMW M5 for $6000?

6 hours ago in News

Buy one of our favorite Q-ships.

Grassroots Motorsports LIVE! on Wednesday, August 23: Building a Homemade Sim Rig

11 hours ago in News

We’re taking our sim-racing game to another level.

That's What i Like: What Attracts Us to Specific Cars?

12 hours ago in Articles

I just spent 10 days in one of my new favorite cars: the 2017 VW GTE.

Your Projects: Wide-Body, V8-Powered Porsche 944

1 day ago in News

Wing, flares, V8 swap and more!

You Need This: Eclipse!

1 day ago in News

Today's special.

Your Projects: Boosted and Flared E30 BMW

1 day ago in News

Another forum member put it best: “This build is absolutely mental. And I mean that in the best possible way.”

You Need This: 1990 Suzuki Carry 4WD Mini-Truck

1 day ago in News

It looks cool, matches our cargo shorts, and makes little sense.

Concours d’Lemons: Showcasing the Best of the Worst and the Worst of the Best

1 day ago in Articles

This year’s Concours d’Lemons celebrated two cars rarely associated with the glitz and glamor of Monterey.

You Need This: Gullwing Doors and Exotic Styling for Just $1500

1 day ago in News

Meet some brown ’70s awesomeness.

Acura Unveils New Prototype Race Car in Monterey

3 days ago in News

Acura yesterday unveiled the new Acura ARX-05 prototype race car.

OUR SPONSORS

Grassroots Motorsports Magazine

Subscribe Today

Also get your instant access to the digital edition of Grassroots Motorsports Magazine!

Learn More
AevlLtp3FV8SzXjRdvTd93dh7i4O23gK