rixter

http://cgi.ebay.com/ebaymotors/ws/eB...958716151&rd=1

Tres

I saw that, thats one wild set up. Are you going to buy it Rixter?

IcemanG17

Rixter
The first thing that comes to mind is WHY....why switch to carbs when you have (in theory) perfectly good fuel injection? It might make more power, when tuned right...but it won't pass smog in CA either! I have to admit it does look cool with the 4 carbs up high! Someone close by has to take a look at it!

jebdog

Not the first nor the last to get Weber carbs. It would probably like more camshaft to take advantage of the breathing improvements.

jebdog

Brian the 1980-1984 USA Injection was designed for SMOG issues ,the Euro spec engines made another 60 HP in addition the computer brain is no longer made for those years so if it fails .....besides as you mention the webers look really neat !

Deb

Jebdog, OK you have my interest re: computer brain no longer made for those cars. Do you know what the options are should it fail? Is the unit repairable?

Warren928

Hey, its a TURBO!!! Look at the pic of the back bumper, that must give it at least 100 hp extra

Jeff McVicar

Looks cool, My buddy has them on his VW

hacker-pschorr

The US motors also had:
1. Lower compresson
2. Less cam
3. Smaller ports
4. Smaller valve's
5. Smaller TB
6. Smaller intake runners

The L-jet vs CIS is not the only reason for the 60hp difference. In fact, the type of injection is the least important factor in the 60hp difference when you factor in the above 6 differences.
I'm not saying L-jet is an awesome system, but I would never tade it for a set of carbs unless I was dropping the motor into a Cobra Kit Car (yest this thought has bounced around in my head)

Nicole

What a downgrade... So sad!

Nicole

Euro spec base engines had only about 5 more hp than US - Reason was the lower compression ratio on the US engines. Yes, they had L-Jetronic injections, too, for lower emissiions.

However, to get 60 more you had to get the 4.7 liter Euro. A few changes to achieve that were the optimized camshafts larger valves with two springs, different ignition timing, and lots of other modifications.

In '83 the US got a detuned version of that 4.7 liter engine.

Again: Only the Euro S had 60 more horsepower (300 from 80-83, 310 from 84)- the basic Euro had 240 (up to its end in '82).

Tres

Yahh, what she said.

touque

holy! look at the monster linkage bars that this thing takes. I used to have Dual 44's on my 912 - would sure hate to have to synchronize, jet and adjust 4 carbs as two was hard enough!

jebdog

When the computer fails 1980-1984 you go buy another used one. The original prototype 928 engines used carbs as documenteted in the book Project 928 but no horsepower numbers were published. Early 911 engines with Webers can get close to 100 hp per liter and are very drivable just not as clean as injection. The car in question was a 4.7 USA the Euro alternative was the 4.7 S. The 80-84 USA injection is perhaps best described as simply adequate and meets US emmisions standards. Those same standards and limitations of the injection needed the milder cams ,smaller valves , lower compression . It no doubt cost Porsche the same money to build a piston or make a camshaft NO MATTER whether it was for a USA or a Euro. They did what they had to just to make it pass emissions. Porsche has always designed intake systems to be only as big as what is efficient for the RPM and horsepower of that particular engine typically using smaller intake runners to preserve low end torque. The USA 80-84 does a good job of what it was designed for but webers ,cams and headers might just unleash the beast !

Flint

There's something bothering me about those wheels...they just don't seem to fit in the wells. Are they the wrong size?