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Discussion Starter · #1 ·
What exactly does this gear do? From reading the HKS site, I picked up that you can adjust the angle of it to regulate the stroke (I think). What kind of performance will this give me? How hard is this to tune? Should I have something other than the stock exhaust (except for a canister)? Thanks for the info.

Ronnie
 

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From what I have gathered you can gain 5-20hp if tuned correctly. A great mod to do if you have f/i and/or are in need of changing your timing belt. Also, this is only the exhaust cam gear...doing the intake cam gear will take away the VVTI...more headaches here. :wink:
 

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cyphertext69 said:
So in other words, not worth it?
Not worth the labor rates most likely until you need to change out your timing belt. But others may have other words to chime in...
 

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Not really worth it unless you're turbo'd. It basically allows you to advance or retard your exhaust cam, either giving you more low end or more top end.

With turbo's, it can help the turbo spool up sooner due to letting the exhaust gasses exit sooner for each cycle, thus allowing better acceleration. more power and torque is achieved. You can gain roughly 5-15rwhp on a turbo'd car, depending on boost level and turbo size, etc...

On an NA car, the results are much less favorable. You might gain UP TO 10rwhp MAX. Usual gain I've read on the IS300 is around 5rwhp. BUT, it's not just for peak hp, it meant to change either acceleration or top end, increasing either might give you more pleasure driving.

BTW, changing the timing belt is not requried during this installation, and is actually a huge pain in the ass. Unless you have high miles and you belt hasn't been replaced, don't bother.

Don't be like me and screw up your head trying to install one of these. They are rather easy to install, but if you have a brain fart, you can bend/break valves with ease!


Kane
 
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