ROG100

https://rennlist.com/forums/for-sale...lly-ready.html

skpyle

I didn't think a good running K-Jet or L-Jet system was bad enough to warrant something like this.

Seth K. Pyle

Adamant1971

Total fail.

ROG100

We need more than that - why?

J1720

I backdated a 1978 911SC with Webers. It ran really good.

I do think that kit a little expensive for a 928, but I like the idea and admire the work.

uncre8tv

Ripping out the engineering of the day to put in the engineering of the past is a failure. A failure to maintain the original, a failure to improve on it in any meaningful way, a failure to appreciate the work that was put in to move away from carburetors. A failure to advance technology. A failure.

I grew up and live in the midwest. I've seen too many cars "fixed" by ripping out injection for carbs to appreciate any of them. No matter how well or poorly they may be done. This kit is a monstrosity and I am sad that people will buy it.

77tony

Not worth it IMHO. Appears the potential for extra power will be negated sucking hot air in from the top of the engine bay. As you know, I would not deviate from the stock setup T

Adamant1971

It's just using old technology to fix something that the mechanic doesn't know or understand how to fix.

Lizard928

This system will give more BHP over a stock intake manifold.
But fuel economy would go down, and cold start may be a bugger.

The factory system is really pretty darn good and if you want more power, there are better ways of doing it.

hacker-pschorr

Winner winner...chicken dinner. For this setup to work properly, you need airboxes piped to the stock openings over the radiator (or hood openings or some other contraption....)

Way too many horror stories from friends with 911's who did carb conversions to ditch CIS or L-Jet. In the end, those who were determined to get their car running perfect in all conditions, went with a 3rd party fuel injection system.

Also reminds me of a friend with a Superformance Cobra. He had $50k into the engine alone from Rousch with a similar carb setup because he liked the look and wanted it "original".
Two years of ownership in the Phoenix area he gave up, sent the car back to Rousch for a fuel injection conversion which costs over $10k.

jcorenman

There's nothing wrong carburetors, they do a fine job of mixing air and fuel. As do injectors. And ITB's are going to flow a lot more air than a stock intake.

That said, there are some issues: The pic's are a twin-dizzy Euro, which already has a bigger intake and better cams and puts down substantially more power and torque than a US-spec engine. I don't know much about the two-cam motors but the Euro is a different animal. So if the goal is more power then I think bigger cams and a better exhaust are pretty much mandatory, otherwise the engine is still getting strangled.

The stacks are also pretty short, which means the total intake runner length is probably less than ideal for good mid-range torque-- but that depends a lot on what the cams are.

You also can't use CAT's, and little hope for passing an emissions test (if that is a requirement).

And of course the cold-air issue, and the air-cleaners look pretty small to me, but that is fixable.

But otherwise a cool setup, if the cams and exhaust are addressed also (for a US motor particularly).

19psi

Very nice and I'd love to hear it...great for performance but I don't think I'd want it for a daily driver.
The 60 hp increase seems very reasonable. Ditching the Bendix EFI system in a Vega and replacing it with a Weber conversion bumps the power of that little 122 cui engine from 110 hp to over 200.

The Fixer

+1 But i love carbs.

I can only imagine how much more power a US '83 like mine would have with Webers.

Heat will be an issue during warm months in traffic..but that could be resolved.

I'd like to test this kit and resolve those issues

But to Roger's question, the price seems fair to me.

EDIT: Hacker's idea for 2 customer air cleaner covers that duct forward to stock inlets is a great. That would also give it a better look.

tmpusfugit

I have grown to like Webers just about as much as I like Lucas electrics......I have a pair of Webers on my Speedster. Runs like crazy when in tune. That said, they need tuning frequently, and I swear they make their own dirt, and it loves to migrate into the jets and clog them at the least opportune times. I can't really imagine trying to keep more than 2 of them in tune at any given time. I have FI to put on the Speedster one of these days, just to get rid of the Webers. I have a buddy who absolutely loves Webers on his Spyder, but he spends literally hours fine tuning the car several times a year.....

docmirror

I've spent a fair amount of my hobby life learning Webers and tuning them. First was on a Beetle with the little replacement for the Solex. After that were various twin systems on sand rails, and finally SIX dual sidedrafts connected to a Lamborghini V12. I have a jet kit, and the Uni-Syn, and I had jet drills at one time, and air corrector charts, and a stock of venturis for various conditions. I even flirted with the 'better' multirange carbs from DellOrto using three circuits for the change over in RPM and MP.

If you are not very familiar with the carbs, and unwilling to invest in the right jets, and emulsion tubes, Webers are not a good plan. If you don't have a Uni-syn, or want to learn how to use it, and don't have or know what a Colortune is, then Webers are not a good plan. If you don't mind fiddling with jets, and air correctors, and learning how to set choke balance, and how to match the carbs, and linkage, read plug colors, and touch the carbs every few weeks or months, then Webers can be a good plan.

I have no idea the market niche anymore for the dual choke(DCxx) carbs. It's not something that would be suitable for a daily driver. It can be a good way to get more power due to the choke to valve ability to gain MP. There's a lot of 'what if' things that need to be covered for it to run well. Including reversion based on the cam overlap, length of intake runner, fluted venturi tubes to straighten the air, and acceptance of modern Ethanol fuels.

If I was working with a FI setup I prolly wouldn't go back to Webers, but they do sound real cool when you stand on it.