Ryoskatekov Posted August 13, 2013 Author Report Share Posted August 13, 2013 well, I look at the plugs color / condition and lift the piston to check A/F mixture.... Idles too high at around 1200 idle screw is screwed all the way back carbs its self are in sync but when i lift the front piston, engine pretty much dies rear, no effect Quote Link to comment
Ryoskatekov Posted August 15, 2013 Author Report Share Posted August 15, 2013 Moved the regulator to the return side. No change. Could it be that its lacking fuel pressure? the gauge is reading 0 psi Quote Link to comment
its_karl Posted August 15, 2013 Report Share Posted August 15, 2013 i'd say there must be an vacuum leak between the carbs and head, possibly a mating surface on the manifold? While it's running, use carb cleaner to spray (in very small shots) on the manifold and get an rpm increase. This should indicate where excess air is coming in and causing your high idle... Another possibility is the butterflys have another set screw that keeps them from shutting all the way. In alot of carbs they use this to prevent a sticking linkage by keeping the butterflys from lodging shut. Quote Link to comment
Ryoskatekov Posted August 22, 2013 Author Report Share Posted August 22, 2013 Turns out, I damaged the nozzle tip when I tried to unsieze it from the sleeve. I switched the front and rear nozzle, viola. now front runs rich and rear runs lean. Bought new nozzles from Z-car source. anyone know why Z-car source costs $50 a pair opposed to MSA's $180? these pricings are rediculous. Quote Link to comment
its_karl Posted August 22, 2013 Report Share Posted August 22, 2013 Glad to hear you figured it out. =) 1 Quote Link to comment
Ryoskatekov Posted August 22, 2013 Author Report Share Posted August 22, 2013 Glad to hear you figured it out. =) yeah, thanks man. disassembling every part of the carburetor really taught me alot hahaha. anyways, do you or anyone know what the Idle temperture for SU's should be? after 10+ min it starts reaching 190 idle and revving inside garage. Quote Link to comment
its_karl Posted August 22, 2013 Report Share Posted August 22, 2013 190 is probably the thermostat temp and sounds normal, the revving fluctuates or just raises to what rpm? Quote Link to comment
Ryoskatekov Posted August 22, 2013 Author Report Share Posted August 22, 2013 190 is probably the thermostat temp and sounds normal, the revving fluctuates or just raises to what rpm? Yeah its the digital water temp gauge that I attached that should be pretty accurate. But glad to hear 190 is normal.... B/c with EFI it never went over maybe 150F idle at most Quote Link to comment
bludestiny Posted August 22, 2013 Report Share Posted August 22, 2013 Average temp for a warm and running L28 is 185-205. Depending on what thermostat you have in. It's strange that with efi it never fully warmed up.... Quote Link to comment
PrimeLuxeZ Posted August 22, 2013 Report Share Posted August 22, 2013 +1 for the new thread title. 1 Quote Link to comment
fairladiesman Posted August 25, 2013 Report Share Posted August 25, 2013 Got any new pictures? Quote Link to comment
Ryoskatekov Posted August 25, 2013 Author Report Share Posted August 25, 2013 Got any new pictures? Next update when the parts comes. :) gimmie about a week or two. Quote Link to comment
fairladiesman Posted August 25, 2013 Report Share Posted August 25, 2013 Sweet. I'm going turbo on mine. Found a deal I couldnt pass up. Have u done anything body wise? Quote Link to comment
Ryoskatekov Posted August 26, 2013 Author Report Share Posted August 26, 2013 Sweet. I'm going turbo on mine. Found a deal I couldnt pass up. Have u done anything body wise? *shhhhhh* Quote Link to comment
Ryoskatekov Posted September 2, 2013 Author Report Share Posted September 2, 2013 Finally got the carbs to run about the same after fiddling with the nozzle and what not. I was in a hurry so Didn't get a video but it ran better than EFI! Exhaust note is the same but definetly more Intake sound. Here are the good news1.Temp stays 190~200 through out. 2.It runs lol. Here is the bad news1.Dieseling and coughing after ign cut (Other than scaring the shit out of myself Its ... Okay i guess) 2.throttle linkage adjustment (Easy) 3.Haven't checked timing. (important but haven't got a chance to) 4.Idles at 1500 and little rich Quote Link to comment
its_karl Posted September 2, 2013 Report Share Posted September 2, 2013 bring the idle down and the dieselling should stop Quote Link to comment
Ryoskatekov Posted September 2, 2013 Author Report Share Posted September 2, 2013 bring the idle down and the dieselling should stop can't... the screw is all the way up. Maybe I should lower the needle a bit? Quote Link to comment
its_karl Posted September 2, 2013 Report Share Posted September 2, 2013 i really dont know su's well enough to say, but I do know that 1500 is too high and when you go to shut off the car enough fuel is still being sucked in to diesel. The needles I suspect are merely for metering (changing these leans/richens fuel mixture), the rpm should be controlled directly with the amount of air cfm given when butterflies are opened. There is an idle screw, but may also be a small set screw to prevent the butterflies from fully closing. Quote Link to comment
Ryoskatekov Posted September 4, 2013 Author Report Share Posted September 4, 2013 SPOILER ALERT *pun intended* Quote Link to comment
Ryoskatekov Posted September 5, 2013 Author Report Share Posted September 5, 2013 was pain in the ass drilling hole with screw driver and drill bits... but I'd say it was well worth it. matches the shaved bumper. Almost looks like those Hachiroku spoilers. and a light cover Quote Link to comment
ArchetypeDatsun Posted September 5, 2013 Report Share Posted September 5, 2013 I love those on S130's I always wanted one for my old ZX. Quote Link to comment
Syncro Posted September 9, 2013 Report Share Posted September 9, 2013 not a fan of the muffler I just saw. Quote Link to comment
Ryoskatekov Posted September 9, 2013 Author Report Share Posted September 9, 2013 not a fan of the muffler I just saw. It's not mine. Its Po's tack welded crap. Its Passable imo. But If I ever get around getting 6-2 headers, I wanna dual it all the way to the rear and center-out it like IMSA 240z Or, if that gets too costly, Vertical duals would be cool too. Quote Link to comment
Syncro Posted September 10, 2013 Report Share Posted September 10, 2013 It's not mine. Its Po's tack welded crap. Its Passable imo. But If I ever get around getting 6-2 headers, I wanna dual it all the way to the rear and center-out it like IMSA 240z Or, if that gets too costly, Vertical duals would be cool too. running dual was my dream but it looked like a bigger pain in the ass then I wanted to deal with, as for the 6-2 header thing, my free 240z came with one, but it had a y-pipe slipped on it to make it a 6-2-1 header, alot of the header I've seen look like a 6-2 header with a y-pipe welded to it. If I were you I'd just say screw it and go crazy with 6 invidual exhaust pipes, have them come out behind the rear tires and have it crawl up the ass with a nice up sweep. but thats my crazy ass idea, would sound wicked though, then imagine getting some slip on bozo style pipes made for them, again another crazy ass idea of mine. 1 Quote Link to comment
Ryoskatekov Posted October 13, 2013 Author Report Share Posted October 13, 2013 Well, Its been a while so here's a update. Got the front spoiler on. SU carbs are also working. Getting the right throttle linkage right now b/c the ratio is all messed up. Before: After: Thanks for all the support!. You guys are always my motivation to work on my ZX Quote Link to comment
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