What are the pros and cons? Is AMS approach of grinding the it down better? Looking for 500 hp of a 4g64 block. Input is welcome.

 

Grinding? you mean machining....I'll let someone else tell you the pros and con's.

 

-Less rotating weight
-One less belt to worry about breaking and getting caught in the timing belt

-A tiny bit of vibration that can barely be felt

 

I have my balance shafts deleted.
pro's:
more power
no stupid little belt to worry about

cons:
vibrations (after 5 mins of being in the car, your used to them. barely noticable)

I deleted mine cuz i was already building the engine. If you think its a easy process, dont do it. If you already have the engine out of the car. Than might as well. Hope this helps

 

anyone else? What about oil pressure?

 

do you loose anything with the balance shaft removal? anything?

 

This may be a dead post, but since I was researching balance shaft delete and read the RRE note I figured I would at least paste it in here for anyone else.

Quoted from RRE website. FYI

"
Balance Shaft Eliminator Kit

Includes a new oil pump stub shaft, inserts for blocking oil flow to where the old bearings were, and a seal for the front balance shaft. Removing the balance shafts will free up 8-12 Hp.

EVO BSE Kit $60.00

Good:
More HP to the wheels
Zero chance the B-Belt will fail and kill the timing belt
Zero chance the balance shaft bearings will fail and damage the rest of the motor
More oil pressure to the rest of the motor
Bad:

More vibration is felt in side the car (no more is made, just more is felt)
Every car is different, some motors are more balanced than others. It is no worse that any other 2.0 liter car with out balance shafts
Ugly:

To install the kit, you will need to also remove the entire oil pump assy to gain access to the balance shafts. You need to knock out the balance shaft bearings and press in the new block off sleeves. To get the balance shafts out you need to remove the DP, oil pan, the transfer case and drop the motor down by removing two motor mounts and loosening the other two. Even if you are already doing a timing belt, there is still lots of additional work, but they do have instructions. You will also need the oil pump gasket and the oil filter housing gasket for your year vehicle. The oil pan goes on with silicone. It is a full weekend job laying under the car with oil dripping on your face for the average guy doing it at home with the motor in the car. This is a hard core DIY install. Even with the timing belt off you are only about 1/3 of the way done. Not to be taken lightly, best done with the motor all apart.
"