Instead of going through all the headache, why not just drop them from the get go.

Cali

 

Personally if I had any doubts about a product I would not purchase it. This means research before hand. Bad word of mouth is a powerful thing. John's story does not fully sink in to someone who did not witness first hand the parts carnage (I did). That alone was a powerful statement to me not to buy their product. They ruined that motor single handedly. Instead, I decided to go with proven parts. That way, I have no doubts in my mind that they will hold up and give me what I am looking for. BTW, I paid 317 bucks w/tax for my Skunk 2 titanium retainers and full Skunk 2 valvespring kit. That plus whichever cams you want would probably get you out the door for way less than 1400 bucks.

 

what about back cutting the valves?

 

Back cutting valves is one of the best performance mods for a head.

You can also do a 3 angle cut to the valve once this is done.

What they do is remove all the metal from the back side of the valve and thus allows more flow when the valve is opening and opened fully.

It also removes weight from the valve train with allows for faster revs and less friction. It also helps in keeping heat down in the head and intake/exhaust tracts


Do you have any idea how much CFM your are flowing now with 5mm oversized and the cams?

 

5 and 4 angle cuts are more for Amercian V-8 engines.


The reason it is not best for imports is imports have less metal on the valves to remove, so they can't do 4 or 5 angled cuts.


3 angle cuts is the best for your application.

If I was you, I would find out what CFM your are flowing in and out with all these mods you have. Bigger is not always the best power producer.
You really want to concentrate on velocity, not just sheer flow. Higher velocity will produce more power, better mileage and better response.

What is the CFM of the turbo? both sides?

I would start to see what you are flowing, this may help correct any problems you have later.

It would suck to have one cylinder run lean, like number 4 as it see the coolant last and get the hottest air from the manifold.

Also with these mods and not know the flow of intake or exhuast, you may get stacking in the intake being your turbocharged. Thats not good either.

Lets learn what you are flowing first!