hillbillyboostn
15+ Year Contributor
- 56
- 1
- Jan 6, 2005
-
london,
Kentucky
anyone know if you can use a evo8 cams in a 420a eclipse?
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hillbillyboostn said:anyone know if you can use a evo8 cams in a 420a eclipse?

hillbillyboostn said:the evo 8 cams are hollow.
shit it was the valves. that completly screws the thread.The Evolution 7 employs Mitsubishi's long-serving 4G63 DOHC, 2.0-litre, 16-valve intercooled turbo four. In current Evo guise, it features hollow camshafts, an up-sized oil cooler, revised intake manifold, twin scroll turbine housing, triple water spray nozzles for a massive front-mount intercooler and a large straight-through exhaust with a dual-stage muffler.
At 19.0 psi of boost, Mitsubishi's 2.0-liter turbocharged inline-4 has somewhat less output with 271 bhp coming at 6500 rpm and 273 lb.-ft. of torque at 3500. Like the WRX STi, the Evo has many technological features found on its former WRC car Mitsubishi pulled out of WRC this season, promising to come back next year. These include hollow camshafts, a custom-designed turbine nozzle and an intercooler water spray. The Evo's twincam powerplant comes mated to a 5-speed manual gearbox.
The Lancer Evolution VIII's camshafts are hollow. The reduction in weight in reciprocating parts like the camshafts is crucial to achieving the free-revving, torque-churning power band.
mavisky said:Actually it is the cams that are gundrilled.
Evo 7 article
Road and Track article
A closer look at the evo by Michael Brock
Ludachris said:Stock valves?
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Just got off the phone with the folks at Jackson Auto Machine, and we were talking about the valves in the EVO. The fact that they're hollow (lightened) poses an expensive failure waiting to happen. Be sure you change that timing belt religiously. If it breaks, you'll need more than just some head work and new valves like the DSMs do (as the valves would bend). The EVO valves break instead of bend. That obviously doesn't do much good in the engine...
Strange Mitsu would do that.
Sorry, gotta ask. How did you break a rocker arm in a 420a?!eclipsegs-t92 said:i actually broke a rocker arm on the 420a and my 4G63 rocker is still working till this day in there