weber 48 ida jetting for 'streetported' 6 port 13b
07-11-17, 10:11 PM
#1
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weber 48 ida jetting for 'streetported' 6 port 13b
titles explains it very very well. i need jetting help pretty much.
no dont tell me to search because i find the same posts and nobody seems to be able to help without going on a rant about **** i dont need to read.
no dont tell me to search because i find the same posts and nobody seems to be able to help without going on a rant about **** i dont need to read.
07-11-17, 11:55 PM
#3
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Thread Starter
but full throttle under 2k it bogs very very bad, feels like it has an ok amount of power in 1st but going to second and beyond feels like its got no torque and power. before i changed the carb it did not have this problem
07-12-17, 07:38 PM
#4
Do you have an air/fuel ratio gauge? Is it only bogging when you first hit the gas, or all the way through the rpm range?
What is your fuel pressure set at, and is the float level set correctly?
Weber carbs are far from plug and play.
As I reread your reply- are you saying the car has no power below 2k RPM? You realize that's normal for an engine with a powerband in the 5-7k range, correct? What carb were you running before, that didn't bog below 2k rpm?
What is your fuel pressure set at, and is the float level set correctly?
Weber carbs are far from plug and play.
As I reread your reply- are you saying the car has no power below 2k RPM? You realize that's normal for an engine with a powerband in the 5-7k range, correct? What carb were you running before, that didn't bog below 2k rpm?
Last edited by TheRX7Project; 07-12-17 at 07:46 PM.
07-12-17, 09:42 PM
#5
Full Member
Thread Starter
Do you have an air/fuel ratio gauge? Is it only bogging when you first hit the gas, or all the way through the rpm range?
What is your fuel pressure set at, and is the float level set correctly?
Weber carbs are far from plug and play.
As I reread your reply- are you saying the car has no power below 2k RPM? You realize that's normal for an engine with a powerband in the 5-7k range, correct? What carb were you running before, that didn't bog below 2k rpm?
What is your fuel pressure set at, and is the float level set correctly?
Weber carbs are far from plug and play.
As I reread your reply- are you saying the car has no power below 2k RPM? You realize that's normal for an engine with a powerband in the 5-7k range, correct? What carb were you running before, that didn't bog below 2k rpm?
07-13-17, 01:12 PM
#7
Full Member
Thread Starter
Do you have an air/fuel ratio gauge? Is it only bogging when you first hit the gas, or all the way through the rpm range?
What is your fuel pressure set at, and is the float level set correctly?
Weber carbs are far from plug and play.
As I reread your reply- are you saying the car has no power below 2k RPM? You realize that's normal for an engine with a powerband in the 5-7k range, correct? What carb were you running before, that didn't bog below 2k rpm?
What is your fuel pressure set at, and is the float level set correctly?
Weber carbs are far from plug and play.
As I reread your reply- are you saying the car has no power below 2k RPM? You realize that's normal for an engine with a powerband in the 5-7k range, correct? What carb were you running before, that didn't bog below 2k rpm?
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07-13-17, 10:18 PM
#9
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i left the timing as is since it previously had a weber dcoe on it that was too small(42) but it felt like it was able to keep up better than this ida as is right now.
say i start out rolling into the rpms from 2nd gear i feel noticeable torque and power but redlining gears it feels like there is nothing.
08-01-17, 12:16 AM
#10
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Thread Starter
have switched to 200 mains, 205 air correctors, 70 idle, f4 emulsion tubes.
i tried out 42 chokes and a 300 needle valve but it would run lean on acceleration but settle out to normal once i was higher up in the RPM range. I switched the chokes out and left the 300 needle and noticed it was acting strange, almost like it was running out of gas on uturns and things like that. Swapped that back out for a 200 needle and it is much better. i feel my mixture screws are too far turned in though as im only about 1.5(maybe less) turns from fully being screwed in.
I also notice at idle my AFR is around 11-11.5
i tried out 42 chokes and a 300 needle valve but it would run lean on acceleration but settle out to normal once i was higher up in the RPM range. I switched the chokes out and left the 300 needle and noticed it was acting strange, almost like it was running out of gas on uturns and things like that. Swapped that back out for a 200 needle and it is much better. i feel my mixture screws are too far turned in though as im only about 1.5(maybe less) turns from fully being screwed in.
I also notice at idle my AFR is around 11-11.5
08-01-17, 07:36 PM
#11
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have switched to 200 mains, 205 air correctors, 70 idle, f4 emulsion tubes.
i tried out 42 chokes and a 300 needle valve but it would run lean on acceleration but settle out to normal once i was higher up in the RPM range. I switched the chokes out and left the 300 needle and noticed it was acting strange, almost like it was running out of gas on uturns and things like that. Swapped that back out for a 200 needle and it is much better. i feel my mixture screws are too far turned in though as im only about 1.5(maybe less) turns from fully being screwed in.
I also notice at idle my AFR is around 11-11.5
i tried out 42 chokes and a 300 needle valve but it would run lean on acceleration but settle out to normal once i was higher up in the RPM range. I switched the chokes out and left the 300 needle and noticed it was acting strange, almost like it was running out of gas on uturns and things like that. Swapped that back out for a 200 needle and it is much better. i feel my mixture screws are too far turned in though as im only about 1.5(maybe less) turns from fully being screwed in.
I also notice at idle my AFR is around 11-11.5
the idle jet sets the mixture for the whole idle range, so if 11.5 is too rich, you might try the next leaner idle jet.
also 205 air correctors seem big to me, but if it works it works
08-01-17, 08:33 PM
#12
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ideally on a weber the idle mixture screw is about 1/2 turn from seated, although 1.5 turns out isn't a bad thing.
the idle jet sets the mixture for the whole idle range, so if 11.5 is too rich, you might try the next leaner idle jet.
also 205 air correctors seem big to me, but if it works it works
the idle jet sets the mixture for the whole idle range, so if 11.5 is too rich, you might try the next leaner idle jet.
also 205 air correctors seem big to me, but if it works it works
08-02-17, 10:29 PM
#13
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book value is about 60 less than the main jet, 205-60=145, your mileage may vary.
the pieces in the carb are interrelated, and you have different fuel pressure, different exhaust, and might just want a different mixture strength than me, or the jetting chart
the pieces in the carb are interrelated, and you have different fuel pressure, different exhaust, and might just want a different mixture strength than me, or the jetting chart
08-03-17, 09:47 PM
#14
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ive got the racing beat road race headers, street port center section and a power pulse muffler. ill probably buy a wide variety of sizes