The fact of the matter is that however much you mod a 4/5K it's still gonna be a chunk and never make as much power as a 4AGE in standard trim. 5Ks are a commercial engine and they don't like being revved, I'd recommend the 4K over the 5K to be honest. There's just no real point if you're gonna get maybe 5hp and a weency bit more torque out of it.
A 4AGE with with extractors and filters is gonna be 130hp at the absolute least and you can take it up to 7300rpm with no worries. With the 4K you're looking at about 6000rpm(mine valve bounced at 5500rpm) tops, so I can imagine the 5K being any better.
Ks are good though just coz they're so simple, lightweight and they take a beating and they just won't die. I used to have a 4K in my KE70 skid car where it would would valve bounce mintues on end and overheat but nothing would stop it.
Wed, 12 November 2003 06:28
