ZR8ED Posted December 5, 2001 Share Posted December 5, 2001 Well it has been one very trying week for me and my Z. I knew I should have just forked over some large bills and bought an electronic boost controler...but NOoooo I have to try to do it on my own, and save some money... Well I tried out my boost controler that I ordered through an industrial supply store. It looks identical to the Hallman boost controler. I ordered one with a spring that is rated from 0-25psi...I'm starting to wonder if I was shipped the correct one. I tried it in several settings, and the best I could get from it was an 11psi spike that dropped off almoost instantly to stock boost levels (7psi) I tried several variations, and even added different springs...same result. I then tried unhooking the wastegate actuator and tried to SOME kind of boost again..it was actually getting worse?? After learning that the wastegate not only lets excess boost off...it actually holds it in till the actuator senses the right boost level...ah ha! I had a stiff spring holding the wastegate closed for this experiment (testing the wastegate itself)...the spring was not stiff enough to hold back sufficient boost!! what an idiot I was hahahaha...(more work on car..less beer) I then removed the spring in the controler again and put in one that seemed WAYYY to stiff...but I was obviously trying to learn here at the same time. Sooo off for a test drive. I was very careful..not knowing what the boost would be like..so I eased into the throttle in 3rd gear...the rpms came up, the boost started to rise, the WHAMMMMM!!!!!!! I was pinned to the head rest and holding the wheel for my life! I was watching that boost guage very closely, and it went past my boost goal, and kept going I took my foot off the gas, but not before my boost guage buried itself past 20psi. I am one lucky son of a bitch let me tell you.. there doesn't seem to be anything wrong, and there is no blue smoke pouring out....it was only a split second, but I have a better understanding of Einstiens theory..I think I may actually have gone back in time! Well it felt like it anyways... Well that same spring is still in there, and there was plenty of adjustment in it to get it down to my boost goal...Only one little problem...I have a boost spike if I FLOOR IT..If I get on the a little less agressive..the boost is stable... I'm wondering if my controller is too close to the wastegate actuator, and there is a bit of extra boost until that ballbearing unseats itself...there is only a few inches of hose, and most of it is steel....i wonder if it does not allow for enough expansion, therfore the boost spike? I was thinking of adding some more rubber hose to it and see what happens..and that spring that came with it..junk. too weak,maybe I did get the wrong part after all? So to wrap this up..the thing does work...it only cost me about 25 dollars..has 2 moving parts, is solid brass, and took 8 hours of putting the car on a hoist (easier access) up and down, up and down, up and down, up and down..whew I'm dizzy now...hehe And to think I'll have to do it all over again when the I/C is finished... Am I a glutton for punishment or what?...O Well..25psi sure was wicked....is that what I have to look forward too? I must be sick... Quote Link to comment Share on other sites More sharing options...
scottyMIz Posted December 5, 2001 Share Posted December 5, 2001 Hey dude i did the same thing when i couldn't get my dial a boost from MSA to get above 14psi the restrictor was too big and let too much pressure past to open the wastegate when i didn't want it to.So i just unhooked the hose all together from the wastegate and tried it well i had the same result but i didn't bary my boost gauge.It got to 25 psi then i let off it just got there so damn fast it was hard to keep track of it till it was to late.I just put in a smaller restrictor and it made all the difference in the world.I had an ic though so i was better off than you where.But the boost that high is just awesome isn't it? Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted December 5, 2001 Share Posted December 5, 2001 Heh, check this out - I'm getting a boost gauge that is peakhold, has a warning light output, and can playback up to 30seconds of time Tell me this sucker won't be a TON of fun to screw with! Only trouble is it only reads in BAR but I can make the conversion if I need to (shrug). Is an ApexI EL 60mm electronic puppy. I'm looking forward to playing with this cuker - will let everyone know how it goes when I get it. Quote Link to comment Share on other sites More sharing options...
Guest Tom Scala Posted December 5, 2001 Share Posted December 5, 2001 Boost spike usually means either the vacuum lines' diameter is too big and/or the line is too long. Kepp the controller as close to the turbo as you can get it and use a 1/8" hose. I had the same problem with a similar type controller (The JoeP MBC)and the short small hoses cured it. Goes to the set level in about a second and stops cold. Turbo lag? We don't have no stinkin' turbo lag. Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted December 6, 2001 Share Posted December 6, 2001 Consider yourself lucky you did not pop a head gasket. If you think that quick burst of 25# of boost was a rush, imagine being able to sustain it YAHOOOOO!!! Quote Link to comment Share on other sites More sharing options...
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