had a nice 2zt built running on t34 .48 housing and been on rollers and is having trouble with higher boost and been advised that a boost controler is needed and wondered what everyone runs or opinions on what one to use any help appreciated as not clued up on these

 

My mate has an apexi AVC-R, looks to be the tits tbh. I dont know a huge amount about them, but i'm sure google does
Someone may be along to correct me, but i would have thought you should be able to control the boost at least a bit though?

 

funny enough just been looking at that on google £400 seems to do alot. anyone know who is the main supplier of these

 

I know somewhere to buy these for £300.

That said, a Boost Controller isn't a miraculous way to get a car to run more boost. If it has a weak Actuator/Wastegate, that will need addressing.

 

going to look at the turbo later to see if anything a miss. the turbo in question has done 2000 since it's rebuild on a -34 but not sure on spring in it. not trying to gain more boost just to smooth out the spike in it to hold around 15-18 psi, at moment has a 9 psi spike/boost loss to hold say 9psi it peaks at 16 and to hold 16psi peaks at 25psi also going to check for leaks and angle of actuatur bracket and arm incase any issues there. are you going to let me into the secret cave of ali baba then

 

Having one fitted to my car next monday, went on the rollers last weekend, got 225bhp at the wheels but having same problem, getting big punch of power then its dropping off. Was also told and shown that the boost controller can help bring the boost in smoother eliminated that massive kick, which in turn will help pro-long the life of the gearbox.
Am also having it set-up with different saved settings, i.e 1 button will run 7psi for motorway cruising, button 2 can be 1 bar, for a bit more fun, and button 3 for the 20+psi mad nutter mode, lol

 

did they recommend any certain product to you or what one you getting

 

If it's spiking that much check the pre-load on the actuator. What type of boost control are you using at the mo ??

Also the length of the vacuum pipes to the boost controller, compressor & actuator have an effect on spike.

You might jus need to increase the pre-load !!

Hope this helps

jb

 

should i try increasing the pre-load then and thats making it longer i think, it's just got a bleed valve on it at moment

 

That'll be why you gettin such a huge spike then !!

You need to decrease the length of the rod (sounds good ay ? ) which essentially closes the spring up inside the actuator making it stronger so it takes mor postive pressure to overcome the strength of the spring. The bleed valve should be used really for minor adjustment !!

How I'd do it is (wait for car too cool down ), get a old foot pump & lob the valve attachment off the end of the pipe. Attach that to the actuator after undoing the 11mm nut. Pump up to your given pressure (16 psi ??), then pull the rod off the wastegate (circlip or R clip usually), push the waste gate shut with your hand, then wind the rod in until it slips comfortably over the wastegate pin in it's closed postion. Then do up the 11mm & re attach the vacuum pipe.

Either that or undo the nut & use a pair of grips to tighten the shaft into the rod !!

jb

P.s. hope this helps !!

P.p.s. If you gonna do this, don't forget to close the bleed valve up before driving the car otherwise your'll get a HUGE boost spike !! and blow the engine up !! (been there, done that)

 

Have a look at the Turbosmart 2 stage boost controller.

You use a switch to switch between the two stages. I use one on my setup, wet and dry, wet around 10-13psi dry 25-30psi on a T38 works great.

James

 

yes, thats exactly what im doing, but it has 4 stages, so switchable dependant on driving conditions and mood, lol

I have brand new turbo and actuator on mine

 

thank you for all the advice so far and i'll try the pre load after and let you know how it gets on

 

will post up what its like next monday night after having mine fitted

 

links

http://www.envyperformance.com/index...category_id=21

http://www.envyperformance.com/index...TOKEN=90285496

HKS' all-new EVC (Electronic Valve Controller) is the first boost controller to feature integrated CPUs in each component (Display Unit, Control Module, and Stepping Motor) for more precise control, quicker response and improved boost pressure stability. This race proven system is available in KPA measurement and features an easy-to-read LCD panel that can be positioned separately from the control module for driver convenience.


works fine for me

the new version EVC 6

http://www.envyperformance.com/index...TOKEN=90285496

HKS celebrates the 20th Anniversary of the original Electronic Valve Controller (EVC) with an all-new EVC boost controller model. The original EVC released in 1987 was the first commercially available electronic boost controller, and revolutionized the aftermarket industry. HKS’ 20 years and five EVC generations of boost control knowledge has been harnessed into this all-new EVC.
The new HKS EVC has improved boost stability for maintaining pressure at high RPMs providing increased top-end power, and a new mapping feature allows boost pressure to be precisely tuned for throttle + RPM (or vehicle speed). The new EVC also offers a selectable kPa or PSI unit of measure, and a unique warning feature where if over boosting occurs, boost pressure can be programmed to drop to a user preset level. The new target boost setting and volume knob with three button user interface makes setup and tuning intuitive and simple. The design of the new EVC features a sleek black case with a clear acrylic faceplate and a positive lit LCD display offering a sophisticated look