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Boost Controller

minichopper6hp

minichopper6hp

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Would there be an effective way to make a boost controller using the bbv to limit the boost of the supercharger? I would like to put on my 3.0 pulley and retain the current 10 psi. Reason is that i dont want to have to keep swapping pulleys everytime i want to change boost level. Also would be good b/c im going to have my intercooler on a switch, with a switch that i could up the boost when the ic is running only. Today i put a restrictor inline with a hose going from the lim to the bottom of the bbv where the factory solenoid was. I originally was running 10 psi, and now am running 4 psi as an experiment. I think that we could adapt the adjustable boost controller like they use on the turbo wastegate. Any ideas?

Logan

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That's what the boost solenoid does in stock form. But I think it limits it to 4PSI instead of 10PSI when active.
 
when it is activated it limits to about 4-5 pounds of boost. i have no idea how you would be able to limit it to a certain amount.
 
right... im thinking of a grainger valve type of setup... that is what i used on my turbo daytona when i had it although the bbv actuator is slightly different. I also want it button selectable, but that is easy enough.
 
so do you have to bypass the solenoid to run more than 4 PSI or did I just read this whole thread wrong?
 


Why would you want your IC pump on a switch in the first place? IMO it should be running all the time in the first place. No point in having an IC if you ain't gonna use it. If you're worried about pumps failing, just get a good pump in the first place (like a GM) and have many years of trouble free use (I have over 70,000 miles on my original IC pump and 3 years). Just my honest opinon.....
 
under normal driving conditions im not running it, doesnt make sense to. even the cobalts from the factory turn on /off. there is no reason to run a pump if you dont need it.
 
minichopper6hp said:
under normal driving conditions im not running it, doesnt make sense to. even the cobalts from the factory turn on /off. there is no reason to run a pump if you dont need it.
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I like mine on because if I need or want all I got right then and there, I don't have to wait a bit for my heatsoak S/C be cooled by my IC before I can get on it. Plus I don't have to pull over and change pullies to a smaller one to use my IC to its full advantage.

Really I see no reason why not to have it on all the time with the pulley and tune you use for it all the time. It won't hurt MPG at all unless you're an asshole with the gas pedel. As for pump life, that seems uneffected IMO. Again, you can't use a cheap bilge pump if you want realibility. It won't drain and electical juice to speak of. I really don't see any pros by not always have it on, but again, thats my opinion. ;)

As for the Cobalts i've heard of there pumps slowing down, but not shutting off. If thats the case, I bet you most of those guys bypass that **** and make it run full power full time because that would be a big disatvantage and make the IC kinda pointless.

IIRC, the Cobra and Lightning guys IC pumps run all the time and there setups work pretty good from the factory. Obviously an upgraded front mount or a big, more capasity reservior does wonders too :th_winking:
 
girl at school has a redline, turned it on all the time with a tech 2. the svt lightning at school is not on all the time from the factory either. the supercharged LSJ's intercooler sucks anyways, by the 3rd pass on the dyno it was completely ineffective, due to its fmhe being only 3/4" thick. i will be doing this when i throw on my 3.0 pulley with my phenolic ic core. im having the solenoid to the switch that controls my pump on/off, when i hit the ic on button, the solenoid will block off boost to the bottom of the bbv diaphragm, giving full boost. when its de energized, it will allow a metered amount of boost to go to the bottom of the diaphragm, keeping boost around 8 psi.
 
im going to have to see what you are talking about exactly with my own eyes, and this is a good idea/setup. maybe i will do this as well, for a later date when i buy my kits off you.
 


minichopper6hp said:
the svt lightning at school is not on all the time from the factory either
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Must be a truck thing them because my buddy's '03 AND '04 Cobra (yes, he has two of them) both run all the time...one is TT'ed and the other is stock with a K&N Cone.
 
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minichopper6hp said:
girl at school has a redline, turned it on all the time with a tech 2. the svt lightning at school is not on all the time from the factory either. the supercharged LSJ's intercooler sucks anyways, by the 3rd pass on the dyno it was completely ineffective, due to its fmhe being only 3/4" thick.
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You cannot base the effectiveness of an intercooler off of it sitting stationary on a dyno...the heat exchanger works off of air passing over it. Pointing a fan at it is not going to be the same as air moving over it down the street or track. Thickness is only one small part of the equation.
 
so, what youre trying to tell me, is that shooting 100+ mph winds at the front of the fmhe is not going to simulate driving conditions?

Also, that stock fmhe sucks ballz, why do you think that is the first thing they get rid of?
 


minichopper6hp said:
so, what youre trying to tell me, is that shooting 100+ mph winds at the front of the fmhe is not going to simulate driving conditions?

Also, that stock fmhe sucks ballz, why do you think that is the first thing they get rid of?
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Tell me what fan you were using to create these "winds" with...not to mention it is not just about flow, either.
 
Tell me then, what is it about? The fan they use is an industrial fan, a little much IMO but they want max cooling.
 
that dyno has really nothing to do with the subject at hand, we are talking about a cobalt, not an m5 with windspeed sensors. Fact of the matter is, it has a crappy fmhe and heat soaks relatively easy.
 
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