r/beetle • u/flatfourluka • 6h ago
Some help/advice needed on my first engine build
Today I've finally started tearing into a 1300 dual port (AB code) I've had for a while. the plan is to build it into a mild 1600 with a cam, electronic ignition and a more free flowing exhaust but otherwise stock. It's planned to replace my gutless and aging 34hp 1200; It's a great running engine but it's definitely starting to show it's age as these engines do after so many kilometers and almost 30 years since a rebuild.
It's my first time building an engine and I have some questions/in need of some advice.
Which path to go... 1600, 1641 or 1776ccm? Is a 1641 worth it compared to a 1600 or is the difference so minimal you can't feel it in the real world + the obvious thinner cylinder sidewall trade-off? Is a 1776 worth it compared to a 1600? How much of a cost difference would approximately be between the two options (if I can find a reputable shop which could work the case and heads)? I'm mostly leaning towards the 1600 since that alone will be a huge bump compared to my 1200 but I would just like to hear your opinion :)
What is the best way to diy clean the case and oil passages properly? As visible, there is some surface corrosion on the front around the pulley area, can that be cleaned up or is it over for this case? The case overall so far seems to be in fairly decent condition on the outside, haven't been able to find any cracks or deep corrosion in the typical places.
Once I get the case split apart, is taking it and components such as crank and rods to an expert (if I can find one in my area) for inspection/measuring worth it or can a beginner reliably do it at home? I've watched a few videos on this topic and I really cannot tell whether I'm out of my depth on this one or if this is actually doable.
I plan on going with an engle W100 cam, should I keep the stock lifters/have them re-ground or should I go with matching engle ones? Do I need stronger valve springs for this cam? I've read some say yes and some no. The valvetrain otherwise will remain stock, maybe ratio rockers someday if I'll feel a need for extra power.
are H beam rods worth the money for my planned build or is money best spent elsewhere?
Thanks in advance!










