AstralSky

A stumbled with my friend mechanic earlier and he told me that before I change a lightweight flywheel, I need to balanced out first the motor internals. And just like you said, pistons, con-rods, crank and clutch needs to be balanced well to go with the lightweight flywheel. Its like a love hate thing he said because fitting one in will have a great accelerating but also looses some torque. He told me that the stock flywheel will do. I just need to balanced the internals so it can run more smoother so I need to bore it and change some new parts and run in between the stock compression up to 10:1. One the other hand, he told me to focus more on the heads and cams. And I don't want a screamer revving up to 9k. I think 7k rpm will be just fine. Thanks for the link. :) I'll read it from time to time and give me news on your differential gearing. But I think your right. I would want the 4.1 :)

The motor is somehow still on good condition though. Our local machinist said that the block is still good and no need to rebore it and it just needed some balancing. As for the head, it needed to be ported and polished. And I was advice to change my cams, valves and spring. And to make it a bottom end mod to suit the driving condition we have here. And a friend told me that lightweight flywheel have a faster acceleration but also tend to strain the engine internals if its too light. Any suggestion for a lightweight flywheel on a bottom end mod engine? And I will stick to the 4 speed. what gearing then should I choose for the differential? a 4.10 or a 3.90?

Thanks for the idea. The thing is the car will be used in city driving and on the weekend maybe bring it to the mountains. And I don't drive that fast to on the open road. I do roughly 80 to 90 kph. So the 4 speed will do I think. And as for the differential, maybe a 4.1 will do. And do I need to change the flywheel to a lightweight one? Or the stock will do?

Hi guys! I've been browsing this forum site for information. I'm from the Philippines and I'm planning on building a "project" car. I already read the wiki about the 4k engine mods and it has given me a lot more information and started taking up notes. I would like to build my own engine because I am the one using it anyway. My question is about a 4K engine. I want a engine modification take can take going uphill at ease and much more on a acceleration power. But still have a good fuel efficiency and a bulletproof one. I don't care less running on top speed because it's not my style of driving. As far as I recall, the bottom end modification is the way to go. how about the transmission? should I go for a 5 speed or rally inspired 4 speed tranny? And about the differential gearing? what would be best? Lastly, anymore tips and suggestion for this kind of modification? Thanks in advance! :)