DIY_EFI Digest Wednesday, May 26 1999 Volume 04 : Number 307 In this issue: Re: Ignition retard knock sensor. Re: O/T Compression ratio and supercharging Re: O/T Compression ratio and supercharging Re: 94 Truck dilemma Re: 94 Truck dilemma Bosch sensor See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Tue, 25 May 1999 22:41:06 -0700 (MST) From: Daniel Houlton Subject: Re: Ignition retard knock sensor. Mark Romans wrote: > > Hate to ask, but was this engine originally designed for a turbo? What's > the compression ratio? Bruce is right, 5 lbs of boost at steady state? And > you want to run regular? Loaded on Hills? > Mark Compression is 8.6:1 Timing is 12 deg BTDC. And no, the engine to my knowledge isn't actually designed for a turbo, although a smaller version (.3l smaller) used in cars was (that's where the turbo and exhaust manifold came from). Also, the factory shop manual does say something about it cooling the underside of the pistons with oil like some turbo engines do. It doesn't actually say it has an oil jet spraying the backside though. OK, I just checked the wording again. It says "An oil jet on the connecting rod provides lubrication to the backside of the piston." Would that be a cooling spray or is it just to lubricate the wrist pin? Also, my cooling system is pretty good I think. I had overheating problems during extended crawling around the desert in the summer. I upgraded the stock, single row radiator (about 1/2" thick) to a much larger capacity 3 row core (about 2" thick) when I put the turbo on so I think I have some breathing room there. Does that really make a difference for extended boost? 9 psi on regular? Is that too much to ask? Sounds like it eh? I don't typically drive a lot loaded down through the hills. Maybe a half dozen times a year on various trips which I can use higher octane gas for. I just hate having to pay for it all the time when I actually only need it about 1% of the time. Hence the thought of an ignition retarding knock sensor for that 1%. Also, I've gotten quite good at driving it an avoiding detonation. I'd hate the thought of letting (or needing to let) someone else drive it. - --Dan houlster@xxx.com http://www.inficad.com/~houlster/amigo.htm ------------------------------ Date: Wed, 26 May 1999 14:18:34 +0800 From: dzorde@xxx.com Subject: Re: O/T Compression ratio and supercharging Thanks Shannen, seems to work fine for me. Although it hasn't got what I'm after unfortunately. Dan dzorde@xxx.com I use this link: http://sura1.jlab.org/~grippo/auto_noframe.html I have trouble with the frames. Shannen ------------------------------ Date: Wed, 26 May 1999 14:21:30 +0800 From: dzorde@xxx.com Subject: Re: O/T Compression ratio and supercharging Thanks Dave, will do some measurements tonight and see if I can bring it back that far without any major machine work. Dan dzorde@xxx.com Run 8:1 TurboDave ------------------------------ Date: Wed, 26 May 1999 08:30:56 +0200 (METDST) From: Ken-Arne Jensen Subject: Re: 94 Truck dilemma Hi Carl May 26 1999 > Hi People, > I have spent an entire day trying to diagnose a problem, to no > avail. When the engine starts it runs fine for approx 10 seconds,then starts > running extremely rich.....I then rev it up to "clean" it out and block > learns and integrators are reasonable (123-125) then gradually returning to ------------------------------ Date: Wed, 26 May 1999 08:35:22 +0200 (METDST) From: Ken-Arne Jensen Subject: Re: 94 Truck dilemma Hi Carl May 26 1999 > Hi People, > I have spent an entire day trying to diagnose a problem, to no > avail. When the engine starts it runs fine for approx 10 seconds,then starts > running extremely rich.....I then rev it up to "clean" it out and block > learns and integrators are reasonable (123-125) then gradually returning to < stuff deleted> > Customer had just come from muffler shop and had new o2 sensor, y pipe and > cat back system installed since previous shop had told him he had a plugged > cat. You should check the new O2 sensor and connections. You don't tell if these problems started after this service though, but a defective O2 sensor might very well give these kinds of problems. - --Ken-Arne //// Ken-Arne Jensen // E-Mail: ken@xxx.no / /// Computer Science Department // URL: http://www.cs.uit.no/~ken // // University of Tromsų // Phone: +47-776-44042 /// / N-9000 Tromsų, NORWAY // Fax: 44054 (barcode="ken@xxx.ui") //// ------------------------------ Date: Wed, 26 May 1999 03:02:15 EDT From: Regnirps@xxx.com Subject: Bosch sensor Anybody now the part number for the generic Bosch EGO sensor of the top of your head? Or what they call it at a Shucks or performance house? Thanks, Charlie Springer ------------------------------ End of DIY_EFI Digest V4 #307 ***************************** To subscribe to DIY_EFI-Digest, send the command: subscribe diy_efi-digest in the body of a message to "Majordomo@xxx. 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