tunning ?

302crew · 10-15-2002, 11:45 AM

Hey ive been working on tunning my car and just had a couple questions about the carb what should i set the sight levels at on the carb they are the clear type and everyone says to keep them at half but what would be some advantages and disadvantes to going higher or lower also there are four scres one on each side of the bowl the video i got said to turn them a turn and a half out what would be the advantages to turning them more or less. I have my fuel pressure set at about 6 to 7 and my timing with the vacum line off the dist is about 14 any suggestions would help me alot im taking it to englishtown this fri for its first timmed runs.

302crew · 10-15-2002, 03:02 PM

anyone

84LX89GT · 10-15-2002, 06:55 PM

I've always heard that you set the floats to where the fuel just starts to pour out of the side holes (in your case you can see without removing anything). If you have the level too high, it can flood around corners, hard braking, etc. where the fuel can slosh. If you have it too low, under hard acceleration and/or cornering you can run out of fuel. This is just what i've been taught.

302crew · 10-15-2002, 10:22 PM

come on someone must know something about carbs

Jeff Chambers · 10-16-2002, 06:26 AM

84's correct on the float level setting. It should be set so that the fuel just starts to trickle out of the sight hole with the motor running. In your case, you want to just to be able to see the fuel level at the very bottom of the sight glass. The four screws you have are the four corner idle mixture screws. Normally, with the car idling, turn them all the way in and then back them out 1/2 to 1-1/2 turns to get the idle mixture correct. I'd start at the 1/2 and adjust from there if needed. All should be adjusted the same amount. You won't see any benefit at part or WOT of different adjustments on these since they are just working with the idle circuit.

302crew · 10-16-2002, 01:39 PM

are you sure with the clear sight glasses that your supposed to set them so low

10-15-2002, 11:45 AM	#1
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	tunning ? Hey ive been working on tunning my car and just had a couple questions about the carb what should i set the sight levels at on the carb they are the clear type and everyone says to keep them at half but what would be some advantages and disadvantes to going higher or lower also there are four scres one on each side of the bowl the video i got said to turn them a turn and a half out what would be the advantages to turning them more or less. I have my fuel pressure set at about 6 to 7 and my timing with the vacum line off the dist is about 14 any suggestions would help me alot im taking it to englishtown this fri for its first timmed runs. __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

10-15-2002, 03:02 PM	#2
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	anyone __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

10-15-2002, 06:55 PM	#3
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	I've always heard that you set the floats to where the fuel just starts to pour out of the side holes (in your case you can see without removing anything). If you have the level too high, it can flood around corners, hard braking, etc. where the fuel can slosh. If you have it too low, under hard acceleration and/or cornering you can run out of fuel. This is just what i've been taught. __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

10-15-2002, 10:22 PM	#4
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	come on someone must know something about carbs __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

10-16-2002, 06:26 AM	#5
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	84's correct on the float level setting. It should be set so that the fuel just starts to trickle out of the sight hole with the motor running. In your case, you want to just to be able to see the fuel level at the very bottom of the sight glass. The four screws you have are the four corner idle mixture screws. Normally, with the car idling, turn them all the way in and then back them out 1/2 to 1-1/2 turns to get the idle mixture correct. I'd start at the 1/2 and adjust from there if needed. All should be adjusted the same amount. You won't see any benefit at part or WOT of different adjustments on these since they are just working with the idle circuit. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

10-16-2002, 01:39 PM	#6
302crew Registered Member Join Date: May 1999 Location: sloatsburg Posts: 261	are you sure with the clear sight glasses that your supposed to set them so low __________________ 306 edelbrock 6037 heads full mac exuast 1.7 rr 373 rear hd clutch tremec mighty demon 650 carb msd ignition rpm air gap intake custom cam still trying to get it to run right

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