I wondered about this - it seems that cam gears for the OEM cams might be the best way to go for those of us whose upgrades are in stages based on short cash flow... any thoughts on this?

 

I likewise noted a slight peak power difference when changing my HKS 272s to -4/-1.5. The downside is slightly slower spool time(~250rpm).

 

With just adding the cam gears to the XEDE and exhaust, the car completely woke up. I used the recommended -5/-5 settings from Vishnu. Their gears are good quality and weren't too expensive. Installation is a bit tricky, and if you can't time a cam belt yourself, I'd say definitely pay somebody to do it. Its an absolute killer mod for the money, though! 75% the power of cams + cam gears, more power than cams on stock gears, and a fraction of the cost. Oh yeah, the car still idles awesome with OE cams and cam gears too.

 

20whp is easy to achieve w/ 264's especially once you get tuned. The idle is fine with stock settings and cam gears are not necessary. You may be able to get more power from them, but the car will run fine w/o them.

 

Hey Noise,

That 30whp from just gears was on a DD or no?

Terry S

 

Yep, Dyno Dynamics.

 

Sure it still idles "fine", but not quite as "fine" as stock. I definitely use cam gears for power and not for their ability to increase idle quality.

 

I keep hearing that the cam gears do nothing for power and aren't worth the investment. Please tell me more. If they indeed do give those kind of gains it may be worth consiering. But everyone keeps telling me they aren't worth it. So confused...

 

What is a too of a rich air fuel raito? I had a little bit of (seemed to be like detonation) a problem in 4th gear at about 100 mph the other day. Almost like it was running out of fuel or something. Kinda like it stuttered a bit. I turned the boost down and it seems to better. I was running a little over 21 psi cause my gauge is wrong. Now I think my car is sitting right at 19 psi.

 

Whoever is telling you that is leaving one of the most economical and effective ways of procuring power from the 4G63 on the table.

Basically, when you retard cam timing, you're moving the torque curve over a bit to the right. A bonus side effect of these cam gears is that they make the car more resistant to knock in the higher rpm band as well.

Since horsepower is a function of torque and RPM, it is pretty obvious that sustaining more torque at higher RPM will produce exponentially more horsepower! If there are any doubters of Evo cam gears making power, I can easily produce a fist full of dyno sheets from independent shops that prove their worth.

 

I'm not sure of the cause (could be one of several things), but it isn't due to a shortcoming of the injectors.

 

Its all in the tuning. I have stock injectors, aftermarket pump, header, full exhaust, cam gears, cams, IC and lower pipe, XEDE, titanium 16G w/ 10.5 hot side, and I run 24psi pump and 25psi race fuel. The stockers are more than up to the task with back to back repeatable runs on the dyno with an ample margin of safety.

 

is dyno dynamics a low reading dyno?

 

Extremely lower than a dynojet, to the tune of 15%-17%.

 

ahhh, i was confused for a second there... should've been putting out a substantial amount more.

i wonder how the hks 264s go up agains the tomei cams? 262s or something? forget the exact number...