no it tapers to 24.5 at 7k and 23 at 8k on both boost settings. I now only run the 30psi boost setting.

 

yes i plan to try out the ecu based boost control using gm 3 port to achieve higher boost at high rpm. what do you recommend the usual load based or is it worth it to get a map sensor and do the psi based?

 

I think its more personal preference as to what makes sense. I used to think that strict control over boost was needed to keep from blowing a HG or doing something worse, but its my current philosophy is that what really matters is keeping knock under control and keeping AFR is in a safe range. With that said, I like psi-based control.

 

Are all of you using stock actuators? I have tuned a car with a Green using a Forge 20psi actuator and it will hold 30psi all the way to Redlien using a Profec Type S boost controller.

 

yes still on IX actuator. green should be able to hold more boost up top.

 

Knock, knock, knock, did I mention knock? Knock will lift heads and push headgaskets. Its all about cylinder pressure. Sure boost increases it, a little. Sure altering timing can increase torque and raise cylinder pressures, but only a little bit. However detonation pulses really stress those head bolts. I've lifted more heads than I care to mention. In every case the knock sum was over 20, sometimes in the 30's. One time I even had the KS maxed out and that took all but 2 seconds (without timing pull) to lift a seriously cool set of headbolts. I've had many lean spells over the years and that never lifted a head. The same is true of overboosting (without big knock on race gas), never lifted a head.

 

If you are still looking for a ebc that will hold psi and get there in a hurry, I was very pleased in that regard with a turboboost 2. I need the function of boost not coming on strong at low throttle, so I am going to go "McFred/ Tephra" stock.

So I have a very well priced ebc&s fs.

 

I hated the profec spec b..It was like the stock turbo was too quick for it and it always had a hard time, the mbc gives me a much better puch on spoolup.. The spec B would also make the car surge if I turned it up to high because of BOV leaking..