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Wed Nov 19, 2008 2:52 pm

I am likely to proceed with the stock injection on this later, dual-port motor for the 68 fasty, however...

I'm wondering, how much if any power can I expect to loose going from a dual 34ICt set up back to the stock injection?

My primary concern is hill-climbing power at altitude as this is the only area where the fastback seems slow; climbing up hills on I-70 into the mountains where we get stuck in 3rd or even 2nd gear.

I know that the injection will correct for altitude which is a plus but is the throttle body comparable in size when it comes to grunt torque?

Thanks in advance for your thoughts,

Scott

Wed Nov 19, 2008 3:03 pm

The injection will compensate the mixture for altitude, but you may also find tweaking your static timing can also give you more power at altitude.

Wed Nov 19, 2008 4:04 pm

i never have a problem going up hills. And I had 34s before I switched back to FI. Never looked back.

Wed Nov 19, 2008 4:15 pm

Remember, that FI has an electronic choke. The 34 ICT webbers, do not.
And you live in Colorado where you should have a choke.

Thu Nov 20, 2008 9:13 am

Yeah, It get's along (and starts) fine without the choke, My primary concern is the horsepower difference when running warm. But agreed, the electronic correction for rich/lean will certainly make a big difference.

Anyone know it's faster or has more torque with 34's or the stock throttle body on the FI?

If it helps, It's a dual-port, otherwise stock besides a bug-pack exhaust that still uses the heaters.

Thanks,

Thu Nov 20, 2008 9:23 am

I went from D-Jet to Weber 34's on my stock 1600; I did not notice any change in power or torque...

of course, with my new 1776, it is a different story...

Thu Nov 20, 2008 10:21 am

Thanks, :)

Thu Nov 20, 2008 2:28 pm

I went from FI to Weber 34's, and now back to FI with my 71 Notch.While the 34's were simpler, easy to tune, they also seemed a little down on low end grunt compared to the FI. This is part of the reason I went back,as the engine itself seemed to run much smoother, and had more pep. If you look in the FI sticky at thetop, you'll see why I went to the Wever 34's.

Fri Nov 21, 2008 12:05 pm

here my $.02

to get the best out of your FI you must stay stock. The FI and its simple ECU only can handle a stock engine. Therefor you'll get an ultra reliable VW from the desert to high mountains. No gimmicks, no nonsense - she will run and run and run ...
Sure you can use a Pertronix and maybe a different muffler - but that's about it what you could change. But then on the other side of the freeway troubleshooting on a FI is easy and can be done with a voltmeter :D

Carbs are a different animal. With carbs you can run a hotter cam, change your heads and tune the hell out of this little engine :twisted:

I've run a 70 square with a FI and I am driving now a 69 square with baby Webers (old school setup) -

gas mileage is pretty much the same - although with the FI and auto I was a tick lower (carbs ~ 32miles/gal, FI-auto ~30/31miles/gal)

I use (and used) both cars as daily drivers - 70 miles a day and I would go with them cross country any time -

The difference is just: If you want to tinker around, then a carb setting is what you want. If you want a rock solid piece of engineering a FI is your setup. And BTW: With a FI you still have the bragging right that you have the first mass production FI on a passenger car - would that sell it? :D

Mon Nov 24, 2008 11:56 am

Thanks again,

and I'm already sold, just wondering what to expect.

cheers,

Scott