Supercharged Moped... the carb doesn't like the boost.
02-07-2006, 07:18 PM
#14
0.0 BAR
Join Date: Feb 2006
Posts: 10
Re: Supercharged Moped... the carb doesn't like the boost.
right, lol gotcha. i understand the whole pressurized box, my question was what is the method for stopping a vacumn fed carb from squirting fuel back into the tank under boost. i read somewhere about using a fuel pump and a pressure regulator. how would this setup work though ?
02-07-2006, 07:24 PM
#15
1.5 BAR
Join Date: Nov 2005
Posts: 667
Re: Supercharged Moped... the carb doesn't like the boost.
use a 1:1 fmu. summit sells [url=http://store.summitracing.com/default.asp?Ntt=1%3A1&x=0&y=0&searchinresults=fals e&Ntk=KeywordSearch&DDS=1&N=115&target=egnsearch.a sp]one
02-07-2006, 07:28 PM
#16
1.5 BAR
Join Date: Sep 2004
Posts: 1,460
Re: Supercharged Moped... the carb doesn't like the boost.
usually with blow through setups, the box or carb hat is used with multiple 1/8" vac/boost lines coming off of it. when in boost, these lines are run to areas of carb that leak fuel under boost i.e. the throttle plate shaft. the pressurized air comingn from above the carb keeps the fuel from leaking under boost. never had a carbed setup before, but thats what i read
02-07-2006, 07:30 PM
#17
0.0 BAR
Join Date: Feb 2006
Posts: 10
Re: Supercharged Moped... the carb doesn't like the boost.
cheers matey, your a star
its a single bell mouthed carb, im gonna box the whole thing so the pressure will be equal around the carb so no fuel leak and with the regualtor traction just put me onto it should be fine. then its just jetting it right with an A/F ratio meter
its a single bell mouthed carb, im gonna box the whole thing so the pressure will be equal around the carb so no fuel leak and with the regualtor traction just put me onto it should be fine. then its just jetting it right with an A/F ratio meter
02-07-2006, 08:53 PM
#18
0.0 BAR
Join Date: Feb 2006
Posts: 10
Re: Supercharged Moped... the carb doesn't like the boost.
im gonna try using the suck through method first actually. seems a lot simpler to construct. no intercooler/BOV etc. my question is though, is it really safe to run A/F mix through a turbo unit ? couldnt the turbo ignite the mix?
02-07-2006, 09:04 PM
#19
1.5 BAR
Join Date: Jul 2005
Posts: 724
Re: Supercharged Moped... the carb doesn't like the boost.
get two pieces of PVC and JB weld one between the head and carb...put a slanted piece of PVC running into the larger piece, angle it towards the head hook youre pump up to it and drill/buy the jets to dump in some fuel
02-07-2006, 11:03 PM
#20
1.5 BAR
Join Date: Sep 2004
Posts: 1,460
Re: Supercharged Moped... the carb doesn't like the boost.
drawl through setups are prone to iceing of the air/fuel mixture at outside temps of less than 50 degrees. it is perfectly ok to suck air/fuel mixture through the turbo and blow it into the motor, however.. if it is less than 50 degrees outside, the mixture can get so cold that it can freeze the throttle blades open.
