I am finally in the process of building my 87 CRX HF (Stingray) and getting it on the road. It will have a 1.3 liter CVCC engine (10:1 compression ratio) and a 5 speed HF trans. I am ready to install the flywheel, and I have two choices:
The 1.3 liter flywheel, pressure plate clutch + all bolts weight 25 lbs
The 1.5 liter flywheel, pressure plate and clutch + all bolts weigh 26 lbs
In the above thread, it was mentioned that the VX has a lighter than normal flywheel- I can see how that could help city mpg (easier to spin up the engine in stop and go driving).
But my car will do 95% of its driving on the interstate at 65-70 mph. Sometimes, the little 60hp 1.3 engine struggles on big hills (I already had the 1.3l engine and HF tranny combo in my 87 Civic for about 8K miles). For this reason, I am leaning toward using the heavier flywheel that may store a bit more energy to carry me over the big hills a little easier.
I would be happy to hear any opinions on the issue of best flywheel weight for highway driving.
lighter flywheel will help acceleration and stop and go but heavier will prolyl help highway as it can "store" the energy and use it on slight hills BUT same is said for larger hills gonna take more oomph to spin it up to get up hills.