LUIS COLCHETE Posted March 26, 2014 Report Share Posted March 26, 2014 Hello I bought a twin mikunis 40phh but i m expecting for them... i see on a green plug. Is a switch? a valve? My original carb has a valve i think it is to cut gas when we turn of ignition on a key. http://s1305.photobucket.com/user/luiscolchetelui/media/_121_zps1f9f0cfa.jpg.html Can you inform me please Many thanks, Luis Quote Link to comment
ggzilla Posted March 26, 2014 Report Share Posted March 26, 2014 Can you post a close up? The photo is small, but looks like a wire. I have never seen PHH with an idle-cut solenoid Quote Link to comment
67411sss Posted March 27, 2014 Report Share Posted March 27, 2014 They are Toyota 18gr(twin cam) carbs not sure what the wire is, could be emissions related 1 Quote Link to comment
LUIS COLCHETE Posted March 27, 2014 Author Report Share Posted March 27, 2014 Hi! I just received the carbs, here a zoom of the wire.... They are 40mm http://s1305.photobucket.com/user/luiscolchetelui/media/DSC_0922_zpscb49fbe8.jpg.html This is the second style of 40phh Type T but i can find the link of wire? Many thanks Luis Quote Link to comment
heretic Posted March 27, 2014 Report Share Posted March 27, 2014 where is the wire attached on the carb? I just received the carbs, here a zoom of the wire.... Quote Link to comment
LUIS COLCHETE Posted March 27, 2014 Author Report Share Posted March 27, 2014 Hello! The green plug where is going conect, what is for? Manty thanks Luis Quote Link to comment
TENDRIL Posted March 27, 2014 Report Share Posted March 27, 2014 it has something to do with the choke. prob. a dash light, indicator Quote Link to comment
LUIS COLCHETE Posted March 27, 2014 Author Report Share Posted March 27, 2014 Maybe to switch on/of a light on a panel? Many Thanks Luis Quote Link to comment
heretic Posted March 27, 2014 Report Share Posted March 27, 2014 Its for a heating element (think choke) found at http://www.rmcarburetors.net/oem_toyota_solex_type_t.htm Starter/Jet Cover This cover is held on with four bolts. Two that go right through and two that screw into the main cover. The electrical connection is there to run a small heating element just under the cover and connected into the ignition circuit. It is put there to pre-heat the air and fuel in climates that get very low temperatures such as found in North America, Japan and throughout Europe. Here in Australia we can remove the connected wires as we do not need this feature. 1 Quote Link to comment
LUIS COLCHETE Posted March 27, 2014 Author Report Share Posted March 27, 2014 Many thanks for your explication Luis Quote Link to comment
heretic Posted March 27, 2014 Report Share Posted March 27, 2014 no problem NOW lets see some pics of that B110 of yours :) Quote Link to comment
LUIS COLCHETE Posted March 28, 2014 Author Report Share Posted March 28, 2014 Hi! I have a standard carb on my Datsun B110 i bought this twin mikuni/solex 40phh to put it on. Quote Link to comment
heretic Posted March 28, 2014 Report Share Posted March 28, 2014 :) it don't matter mang we ALL like pictures .... before ... after.... during .... whatever you got Quote Link to comment
LUIS COLCHETE Posted March 28, 2014 Author Report Share Posted March 28, 2014 Hi! Im expecting the intake Harada Mainfold linkages etc. I ill post pictures... And i will need help, change experiences with our comunity Specifications of twin carbs are 40phh mainjec 160 airjej 210 venturis 32mm i will mount them on my a12 enginne with one rectification, and i will see... in other way i order 4 mainjet 120. Many thanks Luis 1 Quote Link to comment
ggzilla Posted March 28, 2014 Report Share Posted March 28, 2014 Air jets are related to main jets. For 120 main jets, 210 air jets are too big. It will be very lean. Regardless if the engine, you want about 14:1 air/fuel ratio. Quote Link to comment
LUIS COLCHETE Posted March 28, 2014 Author Report Share Posted March 28, 2014 hI i will test with the jets that the carb brings. Please advice with your experience the best air fuel ratio for my A12. Because i dont overheat the pistons? Thanks Luis Quote Link to comment
LUIS COLCHETE Posted March 28, 2014 Author Report Share Posted March 28, 2014 ...and which jets that i have to do the best air ratio Quote Link to comment
ggzilla Posted March 29, 2014 Report Share Posted March 29, 2014 The air/fuel ratio is the same for all gasoline engines. For smooth running go for 14:1. For most HP use 12.5:1 at full throttle. For most fuel economy 15:1 or leaner can be utilized but be careful. For least all around emissions, jet for 14.7:1. It is safe if it never goes richer than 12:1 and never leaner than 14:1. Where engines require unique tuning is in in transient operation - throttle changes and load changes. Most of the effort is spent getting that perfect by using different emulsion tubes, accelerator pump adjustment, sometimes idle jets. If a combo of 32v/120m/170a gives 14:1 with a steady throttle but leans out on throttle opening, then 32v/130m/180a might help even though it is still 14:1 on steady throttle. Buy the Mikuni or Weber tuning book on eBay - or pay an expert to tune it. Mikuni PHH are tuned just like Weber DCOE. Quote Link to comment
ggzilla Posted March 29, 2014 Report Share Posted March 29, 2014 Here is a good article on air/fuel ratio http://www.carcraft.com/techarticles/116_0402_innovate_air_fuel_ratio_meter/ Full throttle should try 12.5:1. Full throttle is enriched by the power valve. Sudden throttle openings need extra richness for acceleration which is provided by the accelerator pump squirter. Here is more in-depth article http://www.autospeed.com/cms/article.html?&A=1595 Quote Link to comment
LUIS COLCHETE Posted March 30, 2014 Author Report Share Posted March 30, 2014 Many Thanks For your explication Quote Link to comment
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