i just cant seem to get past 10 psi. i installed an blitz dual SBC boost controller using version 2 of the diagram on a seq setup. i hit a solid 10psi sometime 11psi around 2,300-2,500 and will hold it there till red line. i have the set at 85 and the gain at 20. ive tried several settings but can only effectively controll boost lower than 10psi. the gain seems to work just as it should. i would like to run around 12.5psi. and someday 14.5.

i have a dp, strait through mp , blitz nur spec cat back
remanufatured G-force ecu tuned for 14.5
apex-i intake with cold air pipes
stock intercooler
i also have removed the ACV, air pump and all the rest of the emmishions exept the egr due to its location.

 

Did you remove the stock boost pills? Could it be that your turbos have the restrictors in the nipples?

Dave

 

How about a boost leak that shows up around 11psi?

 

which method are you using on the SBC manual or auto. what is the peak set to were is the warning set at.

 

well i replaced all the vac line exept the charge controll valve lines with new when i did the install of the boost controller. i havent looked for a pill in the turbo vac hook ups. ill go try that. my fist guess was that at around 11psi a boost leak was appearing but i have yet to determin so. also all the turbo hosing is fastened and tight. the looked the hosing over for leaks but didnt see anything that caught my eye.

 

also i T into my boost gauge under the dash for the boost controller. could this not being a direct hook up cause a problem. and for the boost controllers dual solenoids i down sized the vac line to a regular vac line you would use for replacing the race nest with. i used bigger vac line for the rest of the hook up. if its worth notting up untill this week end i was using the bigger vac line for the whole setup but the line fit on the solenoids IN and OUT loosely. and just so you know i have been using zip ties on the whole set up from the start.

also forgive my inability to spell.

 

i am using the auto function. i think the peak set to were the warning will sound is around 60. but im not to shur. i am going to go to the gym so i will test it out and find out for shur.also i remember reading some were that to find out what your bar is or somthing like that you have to set the controller to the off setting and boost that way. but when i do that i only get around 7-8psi.

 

also before i installed the blitz dual SBC i was not realy getting into it that much and getting and easy 10-12-11

 

when i did the install i didnt know what to do about the turbo precontroll and wastgate controll solenoids so i caped them off is this correct?

 

i took off the vack lines that connect to the turbo intake housing and i looked in the vac hook ups also stuck a small screw driver in and it sunk into the back of the vac hook up. as far as i could tell there was no pill. unless if it is one big one right here.

P.S. i took this on an extra set of turbos witch im shur you can tell but just saying

 

i took it out for a spin and if i just get into it the boost will hit a strong 10-11psi all the way to red line. but it i let off the gas and then hit it again the boost will not come all the way back up to 10-11psi more like 9-10psi. and if i keep doing that with out stoping the car or shifting the boost will keep comming back lower and lower untill it wont realy produce any boost at all.

but when i fist did it i was in third at 10.5psi and i let off some and then back on it and the boost went up to a good 13.5 . i think i was about half way through the tach

 

You may have a slightly sticky solenoid. Anywhere from 3500rpm and up, the turbo control actuator is opening and closing, but the pressure from the boost can overload the pressure solenoid that helps operate the TCA.

Long story short, a brand new pair of turbo control solenoids often solve inconsistent boost issues. $130 in parts, but a good bit of labor to get them installed.

Dave

 

is there any way to test them and or clean them?

 

anyone?

 

You can test them with a Mityvac.

I don't know of a tried-and-true way to clean them. I've tried a little WD-40 and it's improved some, but I doubt it would work in the long run. I'd just buy new ones if they don't test out well.

Dave