I think from now on people should type next to the number exhaust and intake, so nobody gets confused.

Ill be running -1 intake, and +2 exhaust.

Sorry for the typo! 15whp gain is NO JOKE! The belt had to be tightended, and now Ive maxed out the tensioner, so I should probably buy a new belt for it.
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The biggest top end change was seen with minus two degrees intake and plus one degree exhaust.
do you think its better to go more on the exhaust side?

 

IMHO the decreased overlap makes most of the difference and moving that decrease plus or minus one degree will not make much difference.

 

I know people were waiting for me to do my key mod, but I haven't yet. I actually just bought K-Pro because I was sick of some issues with AEM EMS. So, now that I need an entire new tune, Ill be upgrading injectors and installing the keys at the time of installation of the K-Pro.

My results will not be usable for gains now,

 

I've heard from one individual (highly modified) that saw a nice torque increase with changing the exhaust cam to a +2 degrees.




Higher ambient temps, less boost, more torque and power.

More power in the summertime is always nice.

 

Can somebody give me the woodruff keys for dummies version. Is it like adjustable cam gears?

If so then I assume this could be done with Emanage Ultimate as the computer and does not have to be Kpro or AEM?

 

You can run these with any type or brand of engine control modification, even the stock ECU.

You figured them out.

The off set Woodruff keys change the cam timing in fixed known amounts.

 

Very interesting thanks for the post.

I'm always looking to maximise my power.

I have a few questions though if you could please...

1. When altering the valve clearances which is what I guess you guys mean by cam timing, will I need a retune? I guess I will due to timing. I run a greddy emanage ultimate.

2. Is it worth it on a ctsc+ac 7psi, with bolt ons (header, hfc, single pipe exhaust) running 300ish WHP?

3. My tuner thinks I won't benefit really moving from hfc to a test pipe but I'm unsure i think I could gain power? Would I need ignition timing adjustment of just afr? I have already lowered vtec to 4k.

4. What sort of gain in figures would I get if I did cam timing adjustments?

5. Could there be some cons e.g cooling issues with valve clearance adjustments?

Thanks

 

1. The cam timing does not alter the valve clearance. It moves the timing of the opening and closing of the valves earlier or later in the piston cycle.

2. This is one of the cheapest ways yet to add horsepower and torque. How much money is a testpipe, headers, TB, etc? More money by far than cam timing keys and I think they will show less gain.

3. Good to check on dyno after installing to verify AFR. Timing does not need to change much if any. IMHO, The test pipe will not make a detectable difference over the high flow cat at your low power level.

4. That a good question. At your 300 rwhp currently, possibly 10 rwhp and 6 ft lbs. Maybe you can answer it for us some day.

5. No cons at all with these small adjustments.

 

Hey AJ, it isnt the valve clearance thats adjusted, its the position of the cams in relation to the cam gears. The woodruff keys have a step in them so they offset the rotation of the cam in either an advanced or retarded position.
You will see some gains as the decreased valve overlap means that you are not wasting as much boost by allowing it to flow straight in to the cylinder and then straight out the exhaust ports during that period of valve over-lap. the valve over-lap is important in NA applications to get the most from the scavaging effect of the exhaust effectively sucking air into the cylinders from the momentum of the exhaust gas leaving the cylinder.
I think that the general consensus is that the gains are proportional dependant on the amount of boost you are making.

 

Thanks for that, school boy error hehe.

Sounds interesting.