DIY_EFI Digest Sunday, January 23 2000 Volume 05 : Number 036 In this issue: Re: 6 cyl, 4 cyl DIS Re: EGR ?s Holley Projection 2D Re: GM crank reluctor Re: Holley Projection 2D Re: Holley Projection 2D Re: Holley Projection 2D Re: Holley Projection 2D Re: Holley Projection 2D See the end of the digest for information on subscribing to the DIY_EFI or DIY_EFI-Digest mailing lists. ---------------------------------------------------------------------- Date: Sat, 22 Jan 2000 09:58:21 -0500 From: "jtyler" Subject: Re: 6 cyl, 4 cyl DIS A couple questions for anyone who can help: OZ? If you have a 6cyl app that is DIS and the prom has a Cyl select byte, and you reset the cyl number byte to 4. Would it work on a 4 banger? Anyone know for sure? Does anyone know of a 165 4cyl DIS app? (or 808?) Jim - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Sat, 22 Jan 2000 11:11:28 -0500 (EST) From: clive@xxx.org (Clive Apps - 510-0020 ) Subject: Re: EGR ?s try this URL: www.ag.auburn.edu/users/gparmer/efi/egr.txt Clive - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Sat, 22 Jan 2000 12:02:02 -0600 From: Gabe Subject: Holley Projection 2D Hello everyone, My uncle came upon a Holley ProJection 2D very cheap recently and purchased it. He currently has an analog original Projection on his Chev 383 that, after much "tuning" runs fairly acceptably. What I am wondering is have any of you had experience with both systems? Is the newer 2D computer a vast improvement over the analog system. Do you think it would be worth swapping out? I am under the impression that the 2D still lacks true engine load sensing via MAP or MAF but instead still uses TPS like the analog setup. Otherwise he will sell it and attempt to turn a little profit on it. Thanks Gabe - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Sat, 22 Jan 2000 13:12:56 -0500 From: "jtyler" Subject: Re: GM crank reluctor Anyone know of a specific 4 or 6 cylinder GM engine (by year/model) that has a 7 notch "slip on" crank reluctor. Some are machined into the crank, but some photos I have seen show a "slip on style" up near the crank pulley. Problem is they don't tell me year model. I need one. Thanks Jim - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Sat, 22 Jan 2000 13:37:18 -0500 From: "Bruce Plecan" Subject: Re: Holley Projection 2D I'm just boring to listen to but why not wire it to a 1227747 (gm ecm), get a copy of the demoware from Tunercat, a chip burner, an eraser, and some spare proms, and custonize a good computer to your needs. I don't know if any of the holleys use an IAC, might need to get Howell to modify it, or get one from a junkyard, the BBC have a 2" butterfly Grumpy | Hello everyone, | My uncle came upon a Holley ProJection 2D very cheap recently and purchased it. He | currently has an analog original Projection on his Chev 383 that, after much "tuning" | runs fairly acceptably. | What I am wondering is have any of you had experience with both systems? Is the newer | 2D computer a vast improvement over the analog system. Do you think it would be worth | swapping out? I am under the impression that the 2D still lacks true engine load | sensing via MAP or MAF but instead still uses TPS like the analog setup. | Otherwise he will sell it and attempt to turn a little profit on it. | Thanks | Gabe - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Sat, 22 Jan 2000 12:46:13 -0600 From: Gabe Subject: Re: Holley Projection 2D I would love to do that, and hopefully will be able to in the future, my stepfather has a 454 in a 3/4 ton 4X4 '72 chevy w/Holley analog 4bbl that needs the same treatment. I believe I have seen where there is a place for IAC in the Holley TB (I think I remember reading somewhere that it is a Chrysler unit?). I guess I should start gathering info on what all is going to be needed, I think the Holley has 85lb/h injectors. What would be a good cal to start with? I was thinking this might be a quick and easy improvement for the short haul though... Do you know off hand how much air a BBC TB will flow??? I guess I could as my uncle how big his throttle plates are in the Holley. Thanks Gabe Bruce Plecan wrote: > I'm just boring to listen to but why not wire it to a 1227747 (gm ecm), get > a copy of the demoware from Tunercat, a chip burner, an eraser, and some > spare proms, and custonize a good computer to your needs. > I don't know if any of the holleys use an IAC, might need to get Howell > to modify it, or get one from a junkyard, the BBC have a 2" butterfly > Grumpy > > | Hello everyone, > | My uncle came upon a Holley ProJection 2D very cheap recently and > purchased it. He > | currently has an analog original Projection on his Chev 383 that, after > much "tuning" > | runs fairly acceptably. > | What I am wondering is have any of you had experience with both systems? > Is the newer > | 2D computer a vast improvement over the analog system. Do you think it > would be worth > | swapping out? I am under the impression that the 2D still lacks true > engine load > | sensing via MAP or MAF but instead still uses TPS like the analog setup. > | Otherwise he will sell it and attempt to turn a little profit on it. > | Thanks > | Gabe > > ---------------------------------------------------------------------------- > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) > in the body of a message (not the subject) to majordomo@xxx.org - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Sat, 22 Jan 2000 14:15:40 -0500 From: "Bruce Plecan" Subject: Re: Holley Projection 2D | I would love to do that, and hopefully will be able to in the future, my | stepfather has a 454 in a 3/4 ton 4X4 '72 chevy w/Holley analog 4bbl that needs | the same treatment. I believe I have seen where there is a place for IAC in the | Holley TB (I think I remember reading somewhere that it is a Chrysler unit?). I | guess I should start gathering info on what all is going to be needed, I think | the Holley has 85lb/h injectors. What would be a good cal to start with? 454 BBC, 747 prom calibration. Will take some work to get it, right. 4@85 would feed, what 720 HP, which is ridiculious (for a TBI, again IMHO). So part of the problem with the 4@85 idea is like when you run big injecotors on any thing, screwy injector durations (IMHO). Then how much airflow do you really need?. | I was thinking this might be a quick and easy improvement for the short haul | though... Ya, but why do things twice?.. Sorry but I'm getting to old to want to spend my time doing things over. In a long run cheaper to do it right (?) the first time. | Do you know off hand how much air a BBC TB will flow??? I guess I could as my | uncle how big his throttle plates are in the Holley. The two barrel 2" according to Holley is 670 CFM. The 4 barrel holleys as I recall are 1 5/8, or 1 11/16"... Grumpy | | Thanks | Gabe | | Bruce Plecan wrote: | | > I'm just boring to listen to but why not wire it to a 1227747 (gm ecm), get | > a copy of the demoware from Tunercat, a chip burner, an eraser, and some | > spare proms, and custonize a good computer to your needs. | > I don't know if any of the holleys use an IAC, might need to get Howell | > to modify it, or get one from a junkyard, the BBC have a 2" butterfly | > Grumpy | > | > | Hello everyone, | > | My uncle came upon a Holley ProJection 2D very cheap recently and | > purchased it. He | > | currently has an analog original Projection on his Chev 383 that, after | > much "tuning" | > | runs fairly acceptably. | > | What I am wondering is have any of you had experience with both systems? | > Is the newer | > | 2D computer a vast improvement over the analog system. Do you think it | > would be worth | > | swapping out? I am under the impression that the 2D still lacks true | > engine load | > | sensing via MAP or MAF but instead still uses TPS like the analog setup. | > | Otherwise he will sell it and attempt to turn a little profit on it. | > | Thanks | > | Gabe | > | > -------------------------------------------------------------------------- - -- | > To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) | > in the body of a message (not the subject) to majordomo@xxx.org | | -------------------------------------------------------------------------- - -- | To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) | in the body of a message (not the subject) to majordomo@xxx.org | - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Sat, 22 Jan 2000 13:37:33 -0600 From: Gabe Subject: Re: Holley Projection 2D Bruce Plecan wrote: > | I would love to do that, and hopefully will be able to in the future, my > | stepfather has a 454 in a 3/4 ton 4X4 '72 chevy w/Holley analog 4bbl that > needs > | the same treatment. I believe I have seen where there is a place for IAC > in the > | Holley TB (I think I remember reading somewhere that it is a Chrysler > unit?). I > | guess I should start gathering info on what all is going to be needed, I > think > | the Holley has 85lb/h injectors. What would be a good cal to start with? > > 454 BBC, 747 prom calibration. Will take some work to get it, right. 4@85 > would feed, what 720 HP, which is ridiculious (for a TBI, again IMHO). So > part of the problem with the 4@85 idea is like when you run big injecotors > on any thing, screwy injector durations (IMHO). Then how much airflow do > you really need?. I guess I should have clarified, my uncle has a 383 w/the 2bbl unit with the 85lb/h. My stepfather has the 4bbl unit with unknown injectors sizes. > | I was thinking this might be a quick and easy improvement for the short > haul > | though... > > Ya, but why do things twice?.. Sorry but I'm getting to old to want to > spend my time doing things over. In a long run cheaper to do it right (?) > the first time. Yes, you're probably right. Actually, I am going to as my uncle if he would rather do a TPI setup or modify his TB setup, both options using GMECM's (he likes the idea of being able to get a replacement ECU at a parts store if one grenades on a road trip). I have just been a little gun-shy about working on someone else's stuff when I have had so much trouble with my own TPI conversion. I just had lots of little stuff come up, I guess that's to be expected when you get an '85 model. The (I believe to be) bad 85 ECM was most of my problem, along with partially clogged injectors, bad intake manifold gasket, MAF troubles, bad connections on the old harness, and a million other things I am forgetting. I have converted my setup to a 1227165 and an '89 calibration now and things are much better. BTW does anyone have a .ald file for Carbytes for this cal???? > > | Do you know off hand how much air a BBC TB will flow??? I guess I could > as my > | uncle how big his throttle plates are in the Holley. > > The two barrel 2" according to Holley is 670 CFM. > The 4 barrel holleys as I recall are 1 5/8, or 1 11/16"... > Grumpy Good info so far, Thanks.... Gabe - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ Date: Sat, 22 Jan 2000 15:08:54 -0500 From: "Bruce Plecan" Subject: Re: Holley Projection 2D | > 454 BBC, 747 prom calibration. Will take some work to get it, right. 4@85 | > would feed, what 720 HP, which is ridiculious (for a TBI, again IMHO). So | > part of the problem with the 4@85 idea is like when you run big injecotors | > on any thing, screwy injector durations (IMHO). Then how much airflow do | > you really need?. | I guess I should have clarified, my uncle has a 383 w/the 2bbl unit with the | 85lb/h. | My stepfather has the 4bbl unit with unknown injectors sizes. The 4 barrels come 65. 75, or 85 as I recall. The late BBC come with 80-5 and the early with 90-5 injectors. Need to ask/look in archives for what years thou. | Yes, you're probably right. Actually, I am going to as my uncle if he would | rather do a TPI setup or modify his TB setup, both options using GMECM's (he | likes the idea of being able to get a replacement ECU at a parts store if one | grenades on a road trip). I have just been a little gun-shy about working on | someone else's stuff when I have had so much trouble with my own TPI | conversion. I just had lots of little stuff come up, I guess that's to be | expected when you get an '85 model. The (I believe to be) bad 85 ECM was most | of my problem, along with partially clogged injectors, bad intake manifold | gasket, MAF troubles, bad connections on the old harness, and a million other | things I am forgetting. We all do the first couple times, gets better thou. | I have converted my setup to a 1227165 and an '89 calibration now and things are | much better. | BTW does anyone have a .ald file for Carbytes for this cal???? > | Do you know off hand how much air a BBC TB will flow??? I guess I could | > as my | > | uncle how big his throttle plates are in the Holley. | > The two barrel 2" according to Holley is 670 CFM. | > The 4 barrel holleys as I recall are 1 5/8, or 1 11/16"... | > Grumpy | Good info so far, Thanks.... | Gabe - ---------------------------------------------------------------------------- To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes) in the body of a message (not the subject) to majordomo@xxx.org ------------------------------ End of DIY_EFI Digest V5 #36 **************************** 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".