Haha, this fits me pretty well too! I do have stock exhaust and t1r resonated TP but I will let other people do some more testing! It'd be interesting to see what +3exhaust and 0intake does. I think I am fairly satisfied with my results for now!

s2000junky! do it!! maybe I can come watch ^^

- Sung

 

I'll be testing these sometime over the winter. Already checked and can have them installed while on the dyno at my tuner to see the gains.

Sideways. I have a 70mm se dual exhaust with 70mm test pipe and stock header. Would the combo that was dyno'd be the best combo still you think?

 

sideways i got my keys today,thanks for the fast shipping.they look as if they will not make any difference since they have almost no difference in the lips.

 

There isn't going to be much of a step in the key when your only moving 1-3 degrees. Think how much your actually moving the overall diameter of the cam sprocket which is about 4" away from the inner shaft where the key is. There is much more moment at the outside of the cam sprocket then the inner where the key is. Half a mm at the key probably moves the outside of the sprocket close to 3mm.

 

Just the same, -1 intake, +2 exhaust.


It is exciting to get a big increase in power from a little tweek.

 

Sideways,
Thanks for sending the keys out so fast. I am planning to install them this afternoon.

I looked at ther Service Manual and found torque specs & tightnening sequence for the cam holders. The manual says that I need to loosen all of the rocker adjusting arm screws prior to removing the cams. Is loosening the rocker adjusting arm screws step required (or suggested)?

Would you expect any changes to valve clearance since the lobe centers are now offset? I wouldn't think valve clearances would change that much if any due to only 1-2 deg of rotation.

Anything else I need to be aware of?

Thanks!
Chris

 

Some with hands on experience may reply here, I use a mechanic.

Failure to do this correctly can lead to broken cam caps.

Changing the cam timing will not impact valve clearance in the normal sense.

It can decrease the valve to valve clearance but that is not an issue here when going the directions we are going.

 

I just finished installing the keys. No problems at all.

I went ahead and loosened the rocker adjustment arm screws on the cylinders #2 & #4 exhaust valves and the #3 and #4 intake valaves as they appeared to have some valve spring tension (due to position of cam lobes while at TDC). After the keys were installed, I reset/rechecked all the valve clearances (.008 intake & .010 exhaust). You could probably do it without loosening the rockers but I did not want to risk damage to the cam towers.

Now ready to get it retuned (Feb 8th! )!

 

So i imagine that when these keys are added that you will need to recalibrate the ignition timing ?

 

Think you probably will imo.