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142 Track day car! :)

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Old Dec 3rd, 2008, 13:52   #11
Dylan144GT
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Lightbulb DGV Carb setup

Hi Guys

Thanks for all the input so far. will definately be picking a few brains when we start at the beginning of next year!

What is the general consensus about the Weber DGV carb conversion(Pictured below)? I've heard that a decently modified set of SU's can be just as good as the DCOE conversion and that the DGV conversion is a bit of a waste of time. Can anyone confirm this or have some input?

Dylan
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Old Dec 3rd, 2008, 14:02   #12
Sam Barker
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I've always though that single webers were a bit pointless, as you say twin SUs do the business, I'm on them, and I think Snowman is too. If you've already got a set then get them rebuilt, if you don't then they'll probably be cheaper.

Single Webers supposed to give more torque due to air/fuel velocity being higher at lower revs vs. twin webers which give more top end power. I've had a lot of Alfas on twin Webers/Dellortos and they've been ace, although it was a factory fit so designed that way. I know other people that view fitting twins as a good way to make a noisey thirsty car that isn't faster.

I think any carb alteration needs to be treated as a whole with exhaust and camshaft changes to maximise everything.

My engine didn't rev beyond 4,000 very well till I stuck on a simonz exhaust, now it slows around 5,500. First time I'd ever seen anything as a real noticable improvement. Still got the 4 branch manifold to fit.

So, it's how much money do you have to burn? Think about s/h parts but be aware that a lot of old carbs are worn out and shagged, which is why they're for sale.
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Old Dec 3rd, 2008, 15:29   #13
Snowman
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Tend to agree with Sam on this, taking the air/fuel mixture through 90 degrees seems like doing it the hard way when the SU option is a clean side draught.

On SU's, mine will run well over 6000rpm having had the various mods needed and I seriously doubt going the Weber route would have that much effect other than right at the top of that range. You can get them to look good too!


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Old Dec 13th, 2008, 16:29   #14
whitehorse
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Here in Holland we have an engineer, who has developed all the goodies for suspension etc. for classic Volvo's. It's a partime business, but the man knows his fast Volvo's!!

He also has developed some camshafts: the socalled TT8 is for fast rally/race use. You need double valvesprings too.

http://www.tinustechniek.nl Look under "Motor intern" for the camshafts.
It is all in dutch I'm affraid.

Maybe it is a good idea to send him an email for he can tell you what to do best?

Good luck with your project!
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