 Weber IDF Main jet help |
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| tornik550 |
 Aug 11 2010, 07:29 PM
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Senior Member  Group: Members Posts: 1,248 Joined: 29-January 07 From: Ohio Member No.: 7,486 Region Association: None  |
I am in the process of tuning my car after a rebuild. I have dual weber 40's. My engine is a 2.27L. Everything is going pretty well. I am slowly getting the jetting closer and closer. I was driving around at about 60mph yesterday. The head were hotter than I like (325 degrees). I checked the spark plugs and they were bone white. The main jets were at 160. I increased them to 170 (above 160 I only have increments of 10). With the increase to 170, the car is running very well and the temp at around 60mph cruising is around 275. I sped home, tuned off the car and took out the plugs- bone white. I was quite surprised.
The main jet size sounds high too me. Does it sound high to everyone else? Is it possible that I am needing a high main jet size because of the float level? I have my floats set at 10.5 with the gasket. Any opinions would be greatly appreciated |
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Posts in this topic
tornik550 Weber IDF Main jet help Aug 11 2010, 07:29 PM
Jake Raby What size venturis?
40s are quite small for a 2270 Aug 11 2010, 08:18 PM
type2man
What size venturis?
40s are quite small for a 227... Aug 11 2010, 08:39 PM tomeric914
The main jets were at 160.
Just for clarity, are... Aug 11 2010, 08:53 PM tomeric914 BTW, I have 40's on my 2270 but changed out to... Aug 11 2010, 08:57 PM tornik550 My idf's have 32 vents. I am definitely chang... Aug 11 2010, 09:24 PM ME733
My idf's have 32 vents. I am definitely chan... Aug 12 2010, 09:10 AM john rogers The venturi's sound a bit too small as you sur... Aug 11 2010, 10:27 PM jmill The larger vents would send a weaker signal to the... Aug 11 2010, 10:57 PM jmill Another thing you might want to look at is your ET... Aug 12 2010, 07:51 AM tornik550 Right now I have AC jets at 220. The reason for t... Aug 12 2010, 09:21 AM ME733
Right now I have AC jets at 220. The reason for ... Aug 12 2010, 10:51 AM john rogers The rule of thumb I learned when racing which shou... Aug 12 2010, 11:08 AM jmill
The AIR correction jet has a very significant cha... Aug 12 2010, 11:10 AM tornik550 Here is an update. I drove my car to work today. ... Aug 12 2010, 08:25 PM ME733
Here is an update. I drove my car to work today.... Aug 13 2010, 08:16 AM john rogers You will need to become the master of the trade of... Aug 12 2010, 09:54 PM tornik550 I think that I need clarification of the stock flo... Aug 13 2010, 08:32 AM ME733 .........put the float level back where it was....... Aug 13 2010, 08:43 AM jmill Murray is correct in that changing multiple things... Aug 13 2010, 09:26 AM tornik550
Murray is correct in that changing multiple thing... Aug 13 2010, 09:32 AM McMark Increasing the float height will not change the mi... Aug 13 2010, 12:52 PM jmill
Increasing the float height will not change the m... Aug 13 2010, 02:01 PM McMark The rate at which fuel is admitted to the emulsion... Aug 13 2010, 02:19 PM jmill
You can't seriously be arguing that the level... Aug 13 2010, 04:08 PM McMark I guess I read that paragraph a completely differe... Aug 13 2010, 05:34 PM john rogers From several of the posts here I seem to read that... Aug 13 2010, 06:22 PM tornik550 I am new to carbs. I am a human mechanic and not ... Aug 13 2010, 06:30 PM ME733
I am new to carbs. I am a human mechanic and not... Aug 14 2010, 04:48 PM jeffdon This is some of the most insightful carb tuning ta... Aug 14 2010, 09:02 PM tornik550 So what is the cheapest way to get a o2 sensor, a/... Aug 13 2010, 06:35 PM McMark PLX is $269, here.
Innovate Motorsports is ... Aug 13 2010, 07:14 PM john rogers I would suggest that for optimizing a carb setup t... Aug 15 2010, 11:14 AM ME733
I would suggest that for optimizing a carb setup ... Aug 16 2010, 07:43 AM jmill
If your car were perfect at idle and perfect at ... Aug 16 2010, 08:19 AM  |
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