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What is the cylinder sequence on a 1970 bug with a1600 dual port moter?
My guess is no , you don't get better fuel economy . The faster the exhaust is let out the faster the fuel is let in , you'll get worse fuel mileage with dual exhaust . That's just my theory . I would hope the factory spends millions on fine tuning our vehicles , thus the factory set up is the only way to go . I don't know any of this for a fact , but its my guess .
70-72 1600 dual port
Many different answers for this, depends on what you want from the car. For dependability and fuel mileage the stock or lightly modified engine is hard to beat. I would upsize to the 1600 cc dual port engine at least. If you want more performance there are many larger and more powerful engines currently being offered from many aftermarket sources.How fast do you want to go- how much money you got?
look at LMC truck company.. they have stock style dual cats and dual exhaust for a 5.7 (350cid) but they'll fit on your 305cid... that is if your 305 is a truck
To install dual air into a van, check to see if the van was offered with dual air as a factory option. If it was, then find a salvage van for the vents, hoses, and controls. The factory wiring in the van should already have the AC dual wires installed. Then its just a matter of bolting the parts in, using how they came out of the donor vehicle as a template.
Head Bolts for a VW 1600 Dual Port is m10 nuts = 23 ft. lbs. and the m8 nuts = 18 ft. lbs.
The advantages of having dual exhaust, if it is a true dual exhaust, include increased gas mileage, cooler engine temperature, and more engine horsepower. However, if it is not a true dual exhaust, it doesn't matter how many exhaust ports there are, there will be no advantage.
it will help preformance more than millage
A dual exhaust system & or headers will increase fuel mileage but only slightly. Not enough to recoup the expense of the systems.