DIY_EFI Digest Saturday, 9 August 1997 Volume 02 : Number 265 In this issue: RE: Range Rover Re: Adjusting Boost Re: MAP Re: Adjusting Boost Re: Too good to let go by See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- From: "Juha Saarinen" Date: Sat, 9 Aug 97 01:04:06 UT Subject: RE: Range Rover Thanks, I'll check it out! - -- Juha - ---------- From: owner-diy_efi@xxx.edu on behalf of collet Sent: Saturday, 9 August 1997 08:28 To: DIY_EFI@xxx.edu Subject: Range Rover For the two persons who ask for the wiring of Range Rover 3,5 with Luca EFI try HAYNES Manuels. It's technical book about many cars, they come from England, you will see all wiring. (But unfortunatly not the schematic of the ECU) Their site:http://www.haynes.com. ------------------------------ From: Michael McBroom Date: Fri, 08 Aug 1997 19:07:03 -0700 Subject: Re: Adjusting Boost Ed or Jose wrote: > > Seems to me that the main benefit is that it keeps the wastegate > > closed longer before opening up. A regular wastegate using a spring > > starts to open before the boost is near the desired level so that > > the wastegate is fully opened by the time (or rather pressure) that the > > maximum boost is reached. I don't see that it will add any more > > top horsepower, but maybe some middle HP after reaching about 1/2 full > > boost. > > You're correct. Running an EBC will usually give you more midrange > power. Also, an advantage with the EBC is the ability to hold a set > amount of boost without worrying about spiking or overboosting. Couple of questions, if I may: Would an electronic pressure bleed-off system (I'm thinking specifically of the Saab APC) aid in preventing the spring from partially opening throughout the boost range? Also, how well would an electronically activated wastegate interface with a standalone efi/ignition system, like the Motec, if one wanted to use its boost control? > > What about the difference between high quality vs low quality > > wastegates? Do the better ones stay closed longer using a regular > > pressure regulator? I am using an HKS racing wastegate now which > > maintained a very consistent boost on the engine dyno unlike another > > wastegate I once had. > > It's usually not the wastegate design that's the problem...it's usually > the wastegate spring. I had such a problem when dyno testing/tuning a > project car for Muscle Mustangs and Fast Fords magazine. Boost was > rather incosistent, and would not go any higher after numerous > adjustments. After pulling out the spring and replacing it with a new > one (luckily had a identical wastegate lying around), we were able to > continue testing/tuning. Hmmm... with my Garrett, the spring is sealed inside the actuator. BTW, the above project car wan't by any chance the SVO Mustang 2.3L turbo in this month's issue, was it? - -- Best, Michael McBroom '87 745T 123k w/APC Visit the Volvo Performance Site: '88 765T 156k http://mcbrooms.com/volvo _________________________________________________________________________ Graduate Student, Linguistics Author of Research Interest: Biological Origins =McBroom's Camera Bluebook= of Language http://mcbrooms.com California State University, Fullerton _________________________________________________________________________ ------------------------------ From: pantera@xxx.com (David Doddek) Date: Fri, 8 Aug 1997 22:20:36 -0500 (CDT) Subject: Re: MAP >At 01:58 08/08/97 GMT, you wrote: >> >>I've asked the question before and have not recieved an answer. >> >>Anyone out there know what MAP sensor, if any, outputs as a straight voltage >>devider, resistor type device? I am looking for something that is basically >>a pressure controlled rheostat. >>Any ideas? >> > >Isn't this a bourdon gauge with a pot instead of the pointer?! > > > Just get a GM Map sensor. Works of 5 volts, temperature compensated, made for high temps and vibration, comes in 1 2 and 3 bar ranges Out puts a voltage proportional to the pressure and only costs about 30 bucks for the 1 bar type. Or you can get the sensor and a chunck of the harness at the Junk yard for about 10 bucks. Quit trying to reinvent the wheel. David Doddek pantera@xxx.com/~pantera 217-422-3722 69 EFI Fairlane, 89 T-bird SC, 74 Twin turbo NOS EFI Pantera #6825 If you are going to go fast, go real fast. ------------------------------ From: Ed or Jose Date: Fri, 08 Aug 1997 12:30:22 -0700 Subject: Re: Adjusting Boost Michael McBroom wrote: > Couple of questions, if I may: > > Would an electronic pressure bleed-off system (I'm thinking specifically > of the Saab APC) aid in preventing the spring from partially opening > throughout the boost range? Hmm, good question....anyone else care to answer? I'm not sure. > Also, how well would an electronically activated wastegate interface > with a standalone efi/ignition system, like the Motec, if one wanted to > use its boost control? I've never tried using an aftermarket EFI system to control boost. The current EBCs in the market utilize fuzzy logic programming. Am I safe to assume the EFI's boost control output is basically just an activated vacuum valve, set to bleed vacuum when it hits a certain amt of boost? > the above project car wan't by any chance the SVO Mustang 2.3L turbo in > this month's issue, was it? The project car was "The Horse With No Name", a 95 Mustang that they later gave away in a contest. For the record, the head mechanic (at the time of the article) and I are no longer affiliated with Dyno Sport Performance when the place changed ownership in June. - -Ed ------------------------------ From: "Robert Harris" Date: Fri, 8 Aug 1997 22:38:15 -0700 Subject: Re: Too good to let go by Commenting on this is kind of like mud wrestling a pig The more you do it, the dirtier you get and the more the pig likes it. "When some one gets something for nothing - some one else gets nothing for something " If the first ingredient ain't Habanero, then the rest don't matter. Robert Harris - ---------- > From: Terry Martin > To: diy_efi@xxx.edu > Subject: Too good to let go by > Date: Friday, August 08, 1997 4:50 PM > > The following was posted to this list, and commented on by almost > nobody. I think it deserves more attention than that. > > >I'm not subscribed to the list, but have this suggested url that would > >highly educational > >to anyone interested in automotive fuel systems. > >http://www.inett.com/himac/ > > OOOH, now I know why my 2 ton vehicle only gets 8mpg. And all this time > I thought it might have something to do with thermo-dynamics, volumetric > efficiency, or common sense. Wasn't there a cartoon character named > Poque? But I've been highly educationalized now, and thank (or was that > by?) christ my vehicle gets, what was it again? Oh yeah, 100mpg. Even > better on down-grades, so I try to stay with them. > > I bet with a MAGNET attached to my fuel line I could energize the atoms, > or was that molecules?, whatever, and get even more free energy from its > intrinsic poential. If I tie in RADIO waves, and ELECTRONIC beams that > the government uses to spy on me, I could make it fly, maybe even go > into SPACE, where the MAGNETIC FLUX would propel me ever onward. > > Hmmmm. Then again maybe not. Oh well, sigh.... ------------------------------ End of DIY_EFI Digest V2 #265 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. A non-digest (direct mail) version of this list is also available; to subscribe to that instead, replace "diy_efi-digest" in the command above with "diy_efi".