I haven't been to the track in a long time. Every time I try to go something comes up. I spent all day Friday getting the truck ready to go this weekend and was out tuning the truck on 15PSI (was prepared to turn it up to 18-19 psi) and something broke in the tranny. So now I gotta fix that. Our track is only open up here from mid May to Sept.

 

Not to hijack the thread, but I think you goals are realistic. Although I haven't put mine on a dyno, my track times and race weight calculate out to ~630whp on ~12psi in cool weather. Once I do the 8-rib conversion and pulley down to get plentum pressure above internal rotor compression (15psi), I am hoping to be close to that 700whp mark as well. I am interested to see what you can do with the KB if you decided to stay blower only.

 

That's good, I sent an email to Jeff at TPE, to see what he thinks of what I want, but haven't heard back. Seems like he's the KB GM guru,

There's nothing like that top end pull of a turbo that just keeps pulling harder the more you load it, but i also love the massive hit you get when you stab the gas on a PB blower, . I wish I could get both , but you seem to loose a lot of both when you compound, You just get the middle...

 

I think your going to have to make a solid 90* bend on the elbow right before the TB, there is just a TON of vac on all the STS piping untill the turbo spools up. You could probably help that a lot, if you ditched the STS intercooler and ran 3" pipe from the turbo strait to the blower. I mean the turbo is only making about 3 psi anyway, so how much heat can there be from it? The STS kits had a problem with that elbow sucking shut on just motor, let alone a big blower trying to suck on it. If you could find a way to have a BOV or something that would stay open till the turbo spooled and then shut, so the Blower could get a "breath" to spool the turbo, that would be ideal. Here was my cold side on my compound setup, The blower didn't have a problem taking a breath through that 3 1/2" tube and big old S475 turbo, Never had any IAT problems with it either

 

Yea, I have gotten a lot of info from him and others over on corvetteforum regarding the Kenne Bell setups.

Although I have never had a turbo setup, my KB feels equally as strong on the top end as it does low/mid.

 

/\ This above is HUGE. I do remember reading on some VW/Audi specifications that they even have the B.O.V. set up to do this on their Turbo only set ups. It has an air pathway that it connects to upstream of the turbo inlet to supply with fresh filtered air. If I remember correctly it is programmed to switch from pass through (suck through) to closed (std. B.O.V. operation) based upon Throttle percentage, Manifold vacuum, and Mass Airflow. Essentially they're cutting down on "pumping losses" and increasing the efficiency in non-boost conditions, similar to what Magnuson's bypass valve does on the MP and TVS blowers. You could tie all this together I think with a controller that would also control the exhaust "cut out" bypass valve directing exhaust gasses around the exhaust turbine of the turbo that would otherwise cause over boost conditions.

You could program the BOV to be in "pass through mode" until sufficient pressure is present in the exhaust to create "boost" in the supercharger inlet piping. You could set the system up to read "supercharger inlet Pressure" which would be after the throttle body and compare it to "Turbo outlet Pressure". Create an algorithm in the controller that adjusts the BOV operation based on pressure differential of those two readings.

 

You make it and Ill buy it

 

Anything new?

 

wonder what this thing sounds like

 

I will be ready again tomorow with it, I changed to a pt88 and another wastegate, just finishing all the conversion mods. I also changed the inlet elbow right at the blower to all aluminum so no more sucking shut.