ha ha, economy with a turbo.
fine, alright, i admit, it is possible. but you are meant to tune for 12:1 stoich with turbos, approx, rather than the ideal, economic, min emissions of 14 point whatever it is to 1 an efi is capable of...
the efi kit arrived today, but i am sorely tempted to get some copper sheet and solder up a box for the carb... now i have had it do something, i refuse to give up! why copper? cus i have a sheet of it, but not aluminium... and aluminium requires me to go get oxy or a new blowtorch tip (2 inch tip aint much good for delicate work) etc etc...copper i can just solder up and see...
as for boost... and limitations on boost... technically, a "centrifugal air compressor" aka, turbo, can achieve over 100 psi, without multistaging. but, an engine has limitations on what it can get the turbo to produce (in my case, its too darn small for the turbo) and limitations on what it can take. lower compression ratios, etc, an engine setup for turbo, without the turbo, is a complete DOG. low compression, etc etc. then theres this strange area of turbo sizing... surging, and...i forget the other terms... basically, theres an ideal amount of work a turbo can do, or is expected to do. dont meet the requirements, exceed the requirements... bye bye turbo
this turbo i have was wastegated at 8psi, not recommended to go over 14 with it though, for, as butre mentioned...it has inadequate seals, mostly.
on that note, i think i may already be overloading the compressor seal, have to restrict oil flow a bit (lifan 140's have handy oil feed/return lines, as stock) and the way i have it setup, i probably am tearing the crap out of my cams... at least my return line is in the rocker cover, straight back onto the camshaft...
i choose blow through mainly because its meant to be easy to tune, almost retain standard carb tunings... whereas draw/suck through doesnt.. but what im experiencing is doing my head in.
chucking it in a box, thats the answer...no worrying about pitot tubes or other types of nonsense... it may be that my pitot tube is too close to the turbo. it may be oversized. maybe its undersized. maybe its the hole in the carbs bowl vent, or the hose used to hook them together at fault... who the freak would know? strangely, blocking off the vent in the carb throat for the emulsion tube has taken it from spluttering and dying at anything over 1/4 throttle to basically smooth... until i open it wide up and splutter cough bang, pop wheeze, dead... it likes a .8 drill in the jet, when naturally aspirated. any bigger, it wont rev, any smaller, it dies. but with the turbo, it isnt exactly pleased, but works, with a 0.7, whereas a .9mm drill just makes black smoke until the flames erupt from the exhaust
of course, this is the first time i have ever played with a turbo, so i am learning
the plan?
i have a honda C50 frame. now i do courier work, i want something LIGHT, something CHEAP, and, well...something SILLY! the lifan 140 bolts straight in, a brand spanking new engine is approx $300, i can get cams, parts, etc, all fairly cheap...so if i blow an engine...so what? two bolts, the engines removed from the frame... and i am good to go