Mark, I don't usually drive my car with the power off...
PL -----Original Message----- From: mark krawczuk [mailto:[EMAIL PROTECTED]] Sent: Wednesday, 23 January 2002 22:03 To: [EMAIL PROTECTED] Subject: Re: acutator hi, BUT. when power is disconnected it will go back to either fully on or fully off. but with a stepper if you disconnect power it stays where it is... so there........................... mark k ----- Original Message ----- From: "LIEBIG, Peter" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, January 23, 2002 12:33 PM Subject: RE: acutator > Mark, > > Not true. Yes, the solenoid is either ON or OFF - but when pulsed using a > signal of varying duty cycle you get an averaging effect. That's how most of > the EBC's work, and many idle speed control devices on OEM cars. > > The "turbosmart" systems use the solenoid how you've suggested. But they are > just a switchable bleed system - not a real EBC. > > PL > > > -----Original Message----- > From: mark krawczuk [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, 23 January 2002 12:06 > To: [EMAIL PROTECTED] > Subject: Re: acutator > > hi a solenoid is eith er on or off. so basically you can only switch > between high and low boost. > but with a stepper motor you can have the stepper stop halfway or whatever > to adjust the boost. e.g. bleed of > > > mark k > ----- Original Message ----- > From: "LIEBIG, Peter" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Wednesday, January 23, 2002 9:43 AM > Subject: RE: acutator > > > > Geordie, > > > > Yeah yeah, I knew someone would come back and tell me how easy steppers > are > > to control! > > > > I know. But a solenoid is still easier. And if it works why change? I'm > all > > for the simplest method that gets results. > > > > PL > > > > > > -----Original Message----- > > From: Geordie Smith [mailto:[EMAIL PROTECTED]] > > Sent: Tuesday, 22 January 2002 19:28 > > To: [EMAIL PROTECTED] > > Subject: RE: acutator > > Importance: High > > > > Pete, are you nuts? > > Steppers are a piece of cake to control. You can run 'em almost straight > off > > a PIC chip. > > I have one running off my BS2 chip using a small adaptor board I made. I > can > > control it VERY easily. Just get me one of those boost sensors you keep > > talking about and I'll build a stepper controlled digital dial-a-boost. > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]]On Behalf Of LIEBIG, Peter > > Sent: Tuesday, 22 January 2002 12:48 PM > > To: '[EMAIL PROTECTED]' > > Subject: RE: acutator > > > > > > Mark, > > > > Yeah, that's not a bad idea, although a stepper is a bit more difficult to > > control than a simple solenoid. I'm going to try building a controller > based > > around a solenoid (from a simplicity point of view), but I like your idea. > > If I have no luck I'll grab one and give it a try. Thanks for the tip. > > > > The "boost bottle" idea is one that I originally saw in one of Julian > > Edgar's articles. It works on the principle of an engine being able to > > handle extra boost on a momentary basis. Which is true. It just creates > some > > extra volume in the WG actuator line which needs to be filled before the > > actuator sees full pressure. Trouble is the last thing you want in a light > > car with a relatively powerful engine is a boost spike! And with one of > > these that's exactly what you get. I tried one for awhile, but got rid of > it > > pretty quick. All it did was make the car break traction more easily when > it > > came on boost. It just makes the car less driveable. No value at all.. > > > > PL > > > > > > -----Original Message----- > > From: mark krawczuk [mailto:[EMAIL PROTECTED]] > > Sent: Tuesday, 22 January 2002 11:44 > > To: [EMAIL PROTECTED] > > Subject: acutator > > > > hey , what about using a idle bypass solenoid from a commodore throttle > body > > to controll boost? it has a stepper type motor on it so it can be adjusted > > finely, this might be better than using the old brass needle valve > > setup,,,, ( i`m using this set up at the mo) > > > > i heard about putting a cannister ( aerosol can) some where in the > > acutator line... how do i do this? and exactly what does this do? > > > > mark k > > ----- Original Message ----- > > From: "LIEBIG, Peter" <[EMAIL PROTECTED]> > > To: <[EMAIL PROTECTED]> > > Sent: Tuesday, January 22, 2002 10:46 AM > > Subject: RE: Exhaust sizes (HELP) > > > > > > > Andrew, > > > > > > Ahh, the people you run into on the Ozdat list eh! > > > > > > GT25 is going well. I was a bit disappointed at first, because the boost > > was > > > still dropping off high in the rev range - the main reason I wanted to > > > upgrade, but once I got the right WG actuator it was better. I was using > > the > > > old T25G actuator, but the GT25's should have a much larger actuator. > > > > > > I tried an Electronic Boost Controller out awhile ago and it really was > > the > > > turning point. It proved that my turbo setup is capable of supplying as > > much > > > boost as I want all the way to redline. The boost is there - it's just a > > > matter of controlling it properly! It made a huge difference. Very > happy. > > > Pity they are all so expensive! > > > > > > How's the 1200 going? Got a T4 on it yet? :-) > > > > > > PL > > > > > > > > > -----Original Message----- > > > From: Andrew Denniss [mailto:[EMAIL PROTECTED]] > > > Sent: Friday, 18 January 2002 19:47 > > > To: [EMAIL PROTECTED] > > > Subject: Re: Exhaust sizes (HELP) > > > > > > Hi pete long time no hear hows the gt25 going?? > > > cheers andrew > > > > > > "LIEBIG, Peter" wrote: > > > > > > > Hi Daniel, > > > > > > > > Yeah, I thought I'd come back and see how the list is going! I was > > > > subscribed on my home address before and it was getting a bit much. > This > > > > time I've tried doing it at work, so we'll see how it goes. Between > the > > > > Srtransplants list and this one I'm afraid my email volume may be > > getting > > > a > > > > bit high! > > > > > > > > I'm currently not running a cat (smack smack!), but when I do I guess > it > > > > will be in the usual place just after the dump pipe. > > > > > > > > The best dump pipe dia is generally 3". That's pretty much the biggest > > > > you'll fit without hassles. I've made a few now and I'm considering > > making > > > a > > > > batch for sale to suit SR's into 1600's. I'll send you a photo of one. > > > I've > > > > seen a lot of "professional" dump pipes and I've decided that it > > wouldn't > > > be > > > > too hard to improve on them myself! > > > > > > > > PL > > > > > > > > -----Original Message----- > > > > From: Daniel Kroehn [mailto:[EMAIL PROTECTED]] > > > > Sent: Wednesday, 16 January 2002 18:57 > > > > To: [EMAIL PROTECTED] > > > > Subject: Re: Exhaust sizes (HELP) > > > > > > > > HOLY SHIT, > > > > > > > > where did you come from Pete, I thought you'd left the list forever? > > > > Anyway, thanks for the advice. The muffler I have coming has a 2.25 > > inlet > > > > and 4 inch outlet. So I'm still undecided what size to go from the > > > > crossmember back. Up until the crossmember I'm going to use 3 inch > for > > > > sure. Where did you mount your cat? The other question I have is > what > > > size > > > > dump pipe to use? I want to seperate the internal wastegate gases > from > > > the > > > > turbine gases and join them together after the dump pipe exits the > > engine > > > > bay. The turbine itself is only about 2.25" in diameter so should I > use > > a > > > > 2.25" - 3" reducer/expander and build a 3 inch dumpy with a 1.25" > > seperate > > > > wastegate pipe? > > > > > > > > Cheers > > > > > > > > Daniel Kroehn > > > > ----- Original Message ----- > > > > From: "LIEBIG, Peter" <[EMAIL PROTECTED]> > > > > To: <[EMAIL PROTECTED]> > > > > Sent: Wednesday, January 16, 2002 3:15 PM > > > > Subject: RE: Exhaust sizes (HELP) > > > > > > > > > Daniel, > > > > > > > > > > I'm with Geordie - 3" up front with 2 1/2" down back is a good > > > compromise. > > > > > Easier to silence too. And if it's on a 1600 it's heaps easier to > get > > it > > > > > through the rear crossmember. > > > > > > > > > > I'm running that setup with my SR20 and at 14psi boost the exhaust > > > > > backpressure never exceeds 3 psi. > > > > > > > > > > PL > > > > > > > > > > > > > > > -----Original Message----- > > > > > From: Geordie Smith [mailto:[EMAIL PROTECTED]] > > > > > Sent: Tuesday, 15 January 2002 15:13 > > > > > To: [EMAIL PROTECTED] > > > > > Subject: RE: Exhaust sizes (HELP) > > > > > Importance: High > > > > > > > > > > > > > > > 2.5" is generally a lot cheaper and in my opinion there is not a lot > > of > > > > > benefit to the expense of going to a 3" system. > > > > > If you want the best of both worlds, you can go for 3" off the turbo > > and > > > > go > > > > > down to 2.5" further back as the gas is cooler and will condense > > > slightly. > > > > > > > > > > -----Original Message----- > > > > > From: [EMAIL PROTECTED] > > > > > [mailto:[EMAIL PROTECTED]]On Behalf Of Daniel > > Kroehn > > > > > Sent: Sunday, 13 January 2002 8:36 PM > > > > > To: [EMAIL PROTECTED] > > > > > Subject: Exhaust sizes (HELP) > > > > > > > > > > > > > > > List, > > > > > > > > > > heres a question for all you switched on turbo boys. Following > > > > traditional > > > > > lines for an exhaust, I was going to get a 3 inch system for my > turbo > > > > > project. However after reading "maximum boost" by corky bell, it > > seems > > > > that > > > > > he reckons that for the approximate engine power output of my > engine, > > I > > > > > should use a 2.5 inch system. The book also states that for a turbo > > > setup > > > > > the least exhaust is the best? I'm very confused by now. Anyway > back > > > to > > > > > the 2.5 inch set-up, this size comes from a few calculations to do > > with > > > > > exhaust gas velocities. He recommends that the exhaust gases > > shouldn't > > > > > exceed ~450 feet per second, and thus a 3 inch system would be > capable > > > of > > > > > much more than that, so no good? > > > > > There's a bit more in the book but at this stage I've just become > > > totally > > > > > confused. > > > > > > > > > > Eagerly awaiting some opinions.................. > > > > > > > > > > Daniel Kroehn > > > > > > > > > > > > > > > > --membersozdat------------------------------------------------------- > > > > > OZDAT Mailing List Please Note:- > > > > > Send (un)subscribe requests to [EMAIL PROTECTED] > > > > > Send submissions to [EMAIL PROTECTED] > > > > > No unauthorised redistribution of this email > > > > > http://www.ozdat.com/ozdatonline/index.htm > > > > > http://www.ozdat.com/ozdatonline/listindex.html > > > > > http://www.mail-archive.com/[email protected]/ > > > > > > --------------------------------------------------------------------- > > > > > > > > > > > > > > > > --membersozdat------------------------------------------------------- > > > > > OZDAT Mailing List Please Note:- > > > > > Send (un)subscribe requests to [EMAIL PROTECTED] > > > > > Send submissions to [EMAIL PROTECTED] > > > > > No unauthorised redistribution of this email > > > > > http://www.ozdat.com/ozdatonline/index.htm > > > > > http://www.ozdat.com/ozdatonline/listindex.html > > > > > http://www.mail-archive.com/[email protected]/ > > > > > > --------------------------------------------------------------------- > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
