Ben280 Posted June 5, 2020 Share Posted June 5, 2020 @DuffyMahoneyHow are your injectors wired into the ECU? If i'm not mistaken there are only 4 injector drivers on the haltech board. Are you running 2 batches of 3 injectors? I seem to remember from a few pages back you got a CAS dizzy piece so you'd have a cam signal heading to the ECU for a more sequential system. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted June 6, 2020 Author Share Posted June 6, 2020 21 hours ago, Ben280 said: @DuffyMahoneyHow are your injectors wired into the ECU? If i'm not mistaken there are only 4 injector drivers on the haltech board. Are you running 2 batches of 3 injectors? I seem to remember from a few pages back you got a CAS dizzy piece so you'd have a cam signal heading to the ECU for a more sequential system. My elite 750 has 6 drivers. Wired directly. Spark plugs are definitely fouled. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted June 7, 2020 Author Share Posted June 7, 2020 Project hand throttle is done and working. Should help with cold starts with my ITB. Until I get my iac system sorted out. IMG_6219.MOV Quote Link to comment Share on other sites More sharing options...
Ben280 Posted June 7, 2020 Share Posted June 7, 2020 8 hours ago, DuffyMahoney said: My elite 750 has 6 drivers. Wired directly. Cool! For some reason I thought you got a 550. Should make it easy for troubleshooting! Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted June 8, 2020 Author Share Posted June 8, 2020 Tioga has been helping me a lot! I think I have a better handle on the haltech software, which is very complicated. A few things we have found/ learned I was using stock plugs, which I switched in at some point. I upgraded to plugs with resistors (BPR6ES) I was attempting to use throttle % for maps, but no map existed. All were map. So I don't know what the ecu was even doing or deciding what do to. Tioga gave me some helpful maps to use as a base for throttle % based tune. I figured out how to turn data logging on. I am kind of hopeful that the spark plug without resistors could be my issue. Causing feedback all across my ecu and wiring, and causing the injectors to drop or misfire. Gosh that would be a easy fix and dumb of me to miss that. Thanks again Tioga! Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted June 10, 2020 Author Share Posted June 10, 2020 Well my injectors are fine! Gosh I hope it was the spark plugs. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted June 21, 2020 Author Share Posted June 21, 2020 Well injectors are back and I have efi spark plugs. I spent a while tuning this weekend and with Tioga’s help I think I finally found one of my major problems. The tps was set at its highest sensitivity. It would bounce from .34-.49. Thus causing the ecu to think it needs to apply timing and fuel and making it run terrible. I turned it to the lowest and it’s rock solid at 0% and .01 of a voltage change. Haltech is a nice system. But wow is there a lot of settings. If anyone needs Z car help. I would recommend Tioga with Automotive Solutions! IMG_6375.MOV Quote Link to comment Share on other sites More sharing options...
tioga Posted June 21, 2020 Share Posted June 21, 2020 This was causing the acceleration enrichment to constantly be applied. Timing would not have changed for that small amount of throttle change. The acceleration enrichment would explain why the main fuel table changes were not effective Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted August 25, 2020 Author Share Posted August 25, 2020 Well I’m probably a idiot. But I decided to swap my Jenvey throttles bodies out for something a little more vintage/ classic. These are late 70s early 80s SK throttle bodies. They are 47mm that taper to 45. I picked them up off yahoo japan. They have a nice vac balance port on them. I bought two sets off a single seller. Now time to fabricate a single piece fuel rail and find a tps sensor that works. They should match my SK intake nicely. The old SK stuff is so nicely cast. I’m excited! Quote Link to comment Share on other sites More sharing options...
rturbo 930 Posted August 25, 2020 Share Posted August 25, 2020 That's probably the one complaint I have about the Jenvey ITBs - they just don't look right. I've wondered if stripping them of their coating and giving them a more appropriate finish would help, but I guess this is another way of addressing that lol. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted August 29, 2020 Author Share Posted August 29, 2020 My 3.1ish stroker build ran into a small issue. The block will need to be clearanced a little more. The extra long stroked LD crank (84.6) is to blame. The engine can be rotated, and it just barely touches about one time out of three. That’s just the .002” of bearing clearance rocking one way or another. Deck height is within .002” of each other. Andrew Kazanis is a L series wizard. Hopefully when he retires he will build Datsun motors and especially do more head work. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted September 15, 2020 Author Share Posted September 15, 2020 Rebello pistons just got back from ceramic coating by Performance Coatings, Inc. No clue if it was a good idea or not. But we decided to give it a try. Ceramic on top, anti scuff on sides, thermal barrier on bottom. The color is more of a bronze then the picture is showing. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted September 25, 2020 Author Share Posted September 25, 2020 Some L series piston porn for your Thursday viewing pleasure. Originally the ceramic coating had some issues. I reached out to the company eagle suggested and they fixed them for me. Much better coating job. Contact IA coatings:https://www.facebook.com/iacoatings/ Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted September 25, 2020 Author Share Posted September 25, 2020 I finally got all my vintage SK throttle bodies from japan. I’m super happy with the casting and the overall design of them. The inner fit or choke they use is pretty interesting. Without its 47 tapered to 45mm. Oer actually still uses the same design, and I can buy different inner fits. The right 3 are 40mm throttle bodies. The left 4 are 45s. I believe it’s the same casting. But actually sleeved differently not machined. Luckily one has a D shaft end and my tps sensors all work on it. One of the vacuum accumulation block things even has either a map signal or a iac valve in it. Pretty darn cool for something so old. I really like that they look a little more Mikuni/ dcoe carb. The stacks are super beefy. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted November 7, 2020 Author Share Posted November 7, 2020 Vintage Sk throttle body update. I think I found a injector style I like and a oring I like. The injector has a long nozzle and 8 tiny spray holes. The O-ring is some Porsche 16.5mm one meant to adapt newer style injectors, but fits perfectly. Almost too tight, but firmly presses in. Shouldn’t leak air at all and remain snug. I also picked a fuel rail for my vintage ITB. It’s the stock that Tsumori uses in Japan. I couldn’t find anything I loved. I will be doing clear anodized on the fuel rail parts. Quote Link to comment Share on other sites More sharing options...
tioga Posted November 8, 2020 Share Posted November 8, 2020 What is the spray angle of that injector. Not the degree of the cone but the angle the cone comes out at or two cones come out at. With the strange offset injector placement it will be helpful to know so you can try to index it to keep the fuel off the Side of the port. It is hard these days to find single cone injectors since 99% of the motors today have two intake valves. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted November 13, 2020 Author Share Posted November 13, 2020 On 11/7/2020 at 4:21 PM, tioga said: What is the spray angle of that injector. Not the degree of the cone but the angle the cone comes out at or two cones come out at. With the strange offset injector placement it will be helpful to know so you can try to index it to keep the fuel off the Side of the port. It is hard these days to find single cone injectors since 99% of the motors today have two intake valves. Dual V spray is pretty much all that is offered in the newer injector styles. I went back on which one I am picking, I found a ford GT injector that meets my demands, I have one coming to test fit. It's a 20-30 degree cone style spray. So slightly better. I don't think I need the long nozzle. I think the spray pattern will exit fine without. I am curious if the spray angle for the OER/ SK will overall hurt performance slightly. Maybe it will be a wash with the taper bore? Polishing some stacks. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted November 22, 2020 Author Share Posted November 22, 2020 Tps adapter for throttle bodies or carbs. The idea is to turn the stock throttle shaft down on one end to 6mm. Then this threads on. IMG_9238.mov Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted December 22, 2020 Author Share Posted December 22, 2020 Stroker update! Paint and finishing touches. Quote Link to comment Share on other sites More sharing options...
DuffyMahoney Posted December 30, 2020 Author Share Posted December 30, 2020 Vapor blasting is amazing Quote Link to comment Share on other sites More sharing options...
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