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Originally Posted by IGSDann
Driveshaft + Flywheel = no added power, the engine revs quicker and a 1 piece alum. driveshaft is good for tons of power but they don't give you more power.
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....uhhhh...whatever that means.
Okay, couple things to clear up.
Aluminum drive train parts does not CREATE hp, rather it FREES up lost hp due to drivetrain loss. i mean where do you guys think the "faster revs" comes from? Those lighter parts gives your engine more power to get to the wheels instead of using it turn those heavier flywheels and driveshafts.
Aluminum vs. stock = 11 lbs (flywheel) + 11 lbs (driveshaft) vs. 22 lbs (flywheel) + 22 lbs (driveshaft)
so you can see 22 lbs of drivetrain will free up quite a bit of horsepower....I would venture to say around 15 hp maybe as far as 25 if your lucky. I mean look at the aluminum pulley kits power gains.....about 7 pounds of drivetrain savings and those suckers netted as much as 12 hp at certain points!!!
I haven't done the flywheel or driveshaft yet, but I have done the pulleys, best power mod I did next to the headers.
Look at it this way, the average KA puts down 135 rwhp and 140 rwt, these are general numbers all cars will vary, so that means you will need to gain about 65 hp to reach your goal. so here's a list of mods that should help you get there. Keep in mind that these numbers are ALL general and will vary depending on brands used, engine condition, geographical location (i.e mountains vs. beach), and the dyno model used.
intake = 5-7 hp
exhaust = 5 hp
headers = 12-15 hp
pulley kit = 10-12 hp
lightened driveshaft+flywheel = 15 hp
Total = 47-54 hp gain (est)
Other mods you could do that would help but require engine disassembly would be higher compression pistons, if your car will be NA for life, go with at least 11:1 ratio forged pistons. And a port and polish for the head.
These should get you at least 200 hp if not the 215 others brag about. Keep in mind all these numbers I used could vary greatly, these are based on dynos i've seen and articles I read in some reputable mags. I've done all the engine bolt ons (no flywheel, driveshaft) suggested above but have yet to dyno my car, approaching 200k miles and I still smoke v-tec integras. Oh and mine's still an auto.
hope this helps.