Setting up a Weber 48 IDF
01-25-10, 04:57 PM
#1
Setting up a Weber 48 IDF
Hey guys, here's the deal. I just picked up a Weber 48 IDF and I'm trying to figure out what jets to use as a base line to start my tuning. I've found lots of info on the IDA's but nothing for the IDF's. I'm builing a 13B 4 port with a half bridge and some mild exhaust porting. (Please don't flame on me for building a half bridge. I chose it for a reason
) I was thinking of using 200 main fuel jets, 170 air jets, and F11 emulsion tubes with possibly a #300 float needle valve. Let me know what you guys think.
) I was thinking of using 200 main fuel jets, 170 air jets, and F11 emulsion tubes with possibly a #300 float needle valve. Let me know what you guys think.
01-26-10, 12:48 PM
#2
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not sure how different the IDF is... if its similar (48mm throttle plate, venturi etc) then i'd start with IDA type jetting.
01-26-10, 12:56 PM
#3
what i know: the jets for the IDA, IDF and DCO carbies are all the same.
what i "think" i remember: the IDA and IDF are virtually the same except, some of the IDFs have chokes and the manifold bolt patterns are reversed.
if i were you, in addition to searching, i'd probably do the following:
1. check the Australian forums for rotary-specific Weber information,
2. check with a carb-place like CB Performance and at least see if you can cross-reference combination and part numbers between the two carbs. i think they mostly deal with old VWs, but the information on the carbs themseleves is what's relevant.
all in all, i have the feeling if you use the IDA setups as a guideline, you'll be able to flesh out a solid setup for yourself and just fine tune from there.
what i "think" i remember: the IDA and IDF are virtually the same except, some of the IDFs have chokes and the manifold bolt patterns are reversed.
if i were you, in addition to searching, i'd probably do the following:
1. check the Australian forums for rotary-specific Weber information,
2. check with a carb-place like CB Performance and at least see if you can cross-reference combination and part numbers between the two carbs. i think they mostly deal with old VWs, but the information on the carbs themseleves is what's relevant.
all in all, i have the feeling if you use the IDA setups as a guideline, you'll be able to flesh out a solid setup for yourself and just fine tune from there.
01-26-10, 02:31 PM
#4
From what I know, the IDA's and IDF's are pretty similar. They use the same jets, emulsion tubes, etc. I have info on how to set up a 48 IDA for a street port 13B and how to set up a 51 IDA for a full bridge 13B. I kind of picked some numbers in between those two taking into consideration the extra air volume the 51 IDA would have. I guess all I can do is try it and see how it goes.
