We are putting together a 84 (i think) 1.8L 8V engine for a rabbit. It came with the below pictured intake and carb. Can anyone give me any info on the intake? Is it a good setup? Its a side draft setup that doesn't leave much room for an air filter.
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Generally speaking, when you put sidedrafts on an A1 you have to trim the wiper/heater cowl for clearance.
That's an odd duck, given that it is pairing 1&2/3&4 instead of 1&4/2&3.
You'll want a heat shield between the intake and exhaust manifolds. Cut opening in cowl to pull air from base of windshield. Will make great noises!
My concern is with the runner lengths and leaning out cylinders. The manifold looks like its made for a weber. I just dont know about mk1 rabbits, 1.8l engines and weber carbs - never had any of this before.
I know nothing about it specifically, but I've always understood that equal runner lengths were fairly important with DCOEs. There's no plenum to even out the charge, so throat-to-throat variance could be an issue as well. If it were me, I'd find another matching DCOE and the appropriate manifolds to run dual carbs.
If you want to sell that thing, let me know. Looks neat.
It looks like the lateral branches split off beyond the center line of each carb throat. So, even though the air/fuel has a straighter shot into the medial cylinders, half the charge will still get shunted to the lateral cylinders. In other words, it looks like they might have been designed to balance the flow reasonably well.
If you're going for all-out performance, you'd probably still be better off with a dual-carb intake manifold. But that's not only twice money for carbs/jets/horns/filters, but also the added complexity of the throttle linkage.
As other's have said, cut the cowl for better airflow since the intake will face towards the firewall and add a heat shield. Single carb makes tuning easier. Should be a good match. If you search in the technical sections of VWVortex.com, you should find the answers you need.
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