DIY_EFI Digest Tuesday, November 23 1999 Volume 04 : Number 658 In this issue: Re: TRD Supercharger O2 sensor threads Re: O2 sensor threads Re: DIY_EFI Digest V4 #654 See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Tue, 23 Nov 1999 12:32:46 -0500 From: "Robert Wimmer" Subject: Re: TRD Supercharger Ed: 1) Your right that the stock FP on the 3.4 engine is 38-44 psi. I'm intending to install a FMU (rising rate FP regulator) along with the supercharger to increase the pressure to the 60 to 65 psi range. My major worry is how to set up the FMU so it does not boost the FP prematurely. 2) Do you know the range of the Vf signal and how it relates to either air or fuel flow? 3) I think the "Boost a Pump" you mention it triggered by boost pressure, not RPM. But I assume it could be modified to also trigger off of RPM. What I think is necessary for the best driveability and performance would be to raise the FP in two stages. First, increase FP 1/1 to compensate for manifold pressure, and let the AFM and ECU control A/F. When A/F starts to lean out at high RPM, increase FP to 60-65 psi. 4) I have traded e-mails with two of the 4Runner Webringers with TRD superchargers. They have solved their driveability problems by switching to aftermarket injectors, AFM and ECU. This solution is out of my price range and I am not sure it is necessary. Thanks, Bob Wimmer >>> 11/22 3:40 PM >>> >> This assumes a fuel rail pressure of 60-65psi. Is this correct? << It was my understanding that EFI pressure ratios were lower - like closer to 45psi. I may be wrong as I am more familiar with the 22RE than the later V6 engines. >> 2) Is there a way to determine when airflow will exceed the MAF and ECU's ability to maintain the proper A/F mixture at stock fuel pressure? I would like to have some idea when (RPM @WOT) to begin boosting fuel pressure prior to installing the supercharger. << Im curious if the later EFI systems still use the Vf trim signal. If so - this will give you a real close look at what the OEM EFI thinks is going on and how much adjustment is still avail (or NOT avail as the case may be). See if there is a connector marked "Vf" in the check connector box next tothe fuse box in the engine compartment >> 3) Is there a simple way to increase fuel pressure based on boost pressure and engine rpm? I would like to avoid running overly rich, due to increasing fuel pressure based strictly on boost, while still within the MAF control range. << I think there is a "Kenne Bell" "Boost a Pump" device that does this. Most people on this list appear to want to build their own decives from chips though. >> I guess if I'm really lucky, one of the list's readers will have installed and "dialed in" one of these TRD superchargers. << Check out the 4Runner Webring. There was at least one site that had a TRD "dial in" description. Try starting at the bottom of this page - fascianting Toyota stuff There is a 4Runner specific ring but I cant find it right now Ewong TIA, Bob Wimmer ------------------------------ Date: Tue, 23 Nov 1999 13:31:30 -0500 From: Aribert_Neumann@xxx.ca Subject: O2 sensor threads Does any one know (assuming all have the same? standardised threads) the thread specification as used for installing O2 sensors? ------------------------------ Date: Tue, 23 Nov 1999 13:46:59 -0500 From: jsg@xxx.com Subject: Re: O2 sensor threads | Does any one know (assuming all have the same? standardised threads) the thre | ad | specification as used for installing O2 sensors? diy_efi archives.... M18x1.5 john gwynne ------------------------------ Date: Tue, 23 Nov 1999 11:50:52 -0800 (PST) From: Carter Shore Subject: Re: DIY_EFI Digest V4 #654 Actually, bifilar windings are quite simple. You just have to accurately estimate the length of wires to twist together. And although winding a simple toroid is unwieldy compared to an E and I core, the number of turns in a switchmode converter is usually low. FWIW, I used several Delta Mark 10 CDI units on my race and street cars for many years with no failures. The kits were very simple to assemble. I have not seen their ads in quite a while, and net search yielded nothing, so I guess they are gone. - --- DIY_EFI Digest wrote: > > DIY_EFI Digest Sunday, November 21 1999 > Volume 04 : Number 654 > > > > In this issue: > > RE: rec.efi.diy newsgroup? > Re: DIS > > See the end of the digest for information on > subscribing to the > DIY_EFI or DIY_EFI-Digest mailing lists. > > - ---------------------------------------------------------------------- > > Date: Sun, 21 Nov 1999 08:34:42 -0800 (PST) > From: Mark Wilcutts > Subject: RE: rec.efi.diy newsgroup? > > I'd like to chime in late here for support of the > private news server > idea. Using a threaded newsreader would make wading > through the traffic on > this list a breeze. It also makes maintaining a > mailing list unnecessary > as well stopping problems with vacation programs and > invalid email > addresses we've had in the past. Another reason I > like the idea is that it > obviates storing messages locally. On-access serving > should also cut the > I/O requirements drastically. > > Is there anyone on the list who doesn't have access > to a newsreader (e.g. > netscape or outlook express, or equivalent UNIX > software?) > > The only other concern I would have is, as others > have stated, that it > makes it easier for spammers to harvest email > addresses, although this is > already quite possible by greping the current > archives... > > Any further thoughts on this idea? > - -- > Mark Wilcutts > > ------------------------------ > > Date: Sun, 21 Nov 1999 08:38:00 -0800 > From: rhuish@xxx.com > Subject: Re: DIS > > - - ----- Original Message ----- > From: scott christensen > > Subject: DIS > > >>MSD is adverising a DIS 4 cylinder unit in the > foreign car mags > >>(Sport Compact Car), ie sold in USA about foreign. > > >Might hook up with one of the guys from AU., there > is a CD kit > >available. > >Down side is winding your own transformer. > >Grumpy > > I bought one of those CD kits.(JayCar, AU)...looks > good, has all > the components and documentation. I'll give a > performance report if > I ever find someone to help me wind the xformer. :-( > > Bifilar windings? what's that, not anything a novice > like me can do. > Sure wish there was a ready made xformer available. > > They (Jaycar) also make a programable advance > kit...Has two > different programmable advance curves, but could be > modified to > work in "real" time... > > > > > CudaBob '65 - Angels Camp, Calif > CudaBob@xxx.com > http://www.goldrush.com/~rhuish/ > > ------------------------------ > > End of DIY_EFI Digest V4 #654 > ***************************** > > 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". > > __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com ------------------------------ End of DIY_EFI Digest V4 #658 ***************************** 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".