Hey all, thank you very much for the information this is immensely helpful!

I do have a IX, so I'll hold off on cams for the time being.

 

How about some agressive cams on a 9?
I know the mivec will allow the motor to breathe more air than due to variable valve action over a non mivec 4g63, but with aggressive cams wouldn't a mivec 4g63 flow more air with aftermarket cams over stock?
Or are the stock cams on a mivec 4g63 that good? If so, why would a company like Cosworth make Mivec cams if there are not significant increases in power?

The way I see it, the stock head is designed for the stock turbo. You add larger turbo that pushes more volume on a stock head which retains the same volume, then you will not realize the full performance potential of the new turbo. Of course this implication would apply to all parts associated to the movement of air from the intake to the exhaust.

I can see this agrument applying more to those who only do a cam upgrade.

 

I'm not going to go that big with my build, I will be satisfied with ~350awhp on 91 octane on my daily driver.

 

Post up your results when you are done. I am curious on what your numbers are on 91. Good luck with your build.

 

don't forget to upgrade your injectors, and fuel pump if you have not done it already. The BBK is a hungry turbo.

 

Yep! They are on the list of supporting mods for the BBK full.

 

Also, what size injectors will I need to properly support this turbo?

 

from what ive read alot of bbk users have gone with 750-780 cc minimum. it wont hurt to go bigger, since most tuners can make 1000cc or larger very drivable, it just depends on what ur plans are for the future...on the topic of ur cams, another thing to think about is the # times u will have to tune ur car. im not sure if u do dyno tunes, mail in or email, but if you're paying to get the car tuned, thats an extra session u will have to pay for in the future (one for turbo setup and another once u get cams). If it were me I would do all power upgrades on my agenda and get it tuned all at once, and save $ i would have spent on an additional tune. spending money on tuning is absolutely necessary, but i try to optimize what i get from each tune..

 

Agreed.

I think once I get this turbo on and a few other smaller mods (O2, FMIC and LICP) that's pretty much it for me. I would like to have the install and dyno tuning all done in the same day.

PS - At what power level do I need to replace the stock clutch?

 

I agree. I plan on getting the BBK full but am getting all my other parts together (ported and coated exhaust and intake manifold, 65mm throttle body, S2 cams, springs and retainers, exedy twin disk, injectors) Once I have everything I'm going to do everything at once. It will save down time on the car and multiple tuning session costs.

 

I would do the clutch before the turbo or at the same time. I have 343 awhp 340 tq and my clutch is starting to slip a bit.

 

I LOVE the S2 with gsc springs on the ix's...

especially with some BBK mixed in

CB

 

So we got the burger and fries.....

what do we drink with this ensemble? possibly some E-85???

 

As has been mentioned several times, I would do the turbo first and then the cams. The turbo will net bigger gains initially, and the upgraded cams will be able to build on the newfound power.

 

so the S1's, are they a mild cam?

Also how are these cams? Are they also good if i am gonna do a FP red or the CBRD turbo's?
Cosworth M2 Cams w/valve Springs
There is a guy in Canada selling these so im deciding. Not sure if i wanna do cams cause no one here in my city i trust to install them... you americans are sooo lucky to have experienced ppl who know this car... I WISH!