Question About Tuning ITB Manifolds
02-19-2006, 07:37 PM
#3
The reason I asked, is because of a discussion I was in about ITBs on small block Fords, as used in Cobra replicas. People closer to the action than me indicated that the throttles needed be synchonized like a Weber. A PITA if I recall correctly.
However, this has never been mentioned in LSx ITB discussions. My guess is that they are just miss-enformed, and the problem was simple tuning.
This a comment from this page on Webers (http://www.inglese.com/tech.htm) :
David
However, this has never been mentioned in LSx ITB discussions. My guess is that they are just miss-enformed, and the problem was simple tuning.
This a comment from this page on Webers (http://www.inglese.com/tech.htm) :
A Weber carburetion system will not be right, unless it's synchronized to ensure that each carburetor is doing exactly the same as the next - the name of the game is perfect cylinder tuning. The synchronization procedure can either be a breeze or a nightmare, depending on whether you have a well-designed linkage system or not. The secret to a good linkage setup is that it must allow independent adjustment of each carburetor without affecting all the rest as you go through the procedure. Here again, if someone tells you they're absolutely impossible to synchronize, you might study his linkage. Chances are, it's incorrect and he's fighting himself. The right components are now available to take this out of the dark ages.
02-19-2006, 07:48 PM
#4
With a $3k intake, I would hope all the linkages are properly adjusted and all open to the same place. It would suck to get a intake like that and all the blades opened to a diffrent location. I believe the quality of the Harrop or many of the other brands, like Kinsler/Katech use very top quality parts and have a process were they check to make sure things are aligned properly. When mine comes in, I'll deffinatlly check it. Remember, your only checking for the blades being proprtional on these intakes. No gas to adjust, thank goodness.
02-20-2006, 02:13 PM
#6
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Beast, are people using map sensors with these or are they going to alpha n? I would think you'd have to go alpha n as there is no common plenum, unless ofcourse you just stick the map sensor underneath one of the throttle bodies in one of the runners and assume all runners are the same but I don't think that would work. Maybe i'm wrong though???
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02-20-2006, 05:37 PM
#8
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You guys probobly already know about this gizmo but i bought this air gauge thing to syncronize some ITB's that i had to take apart, i'm guessing that the Harrop is all ready set up/adjusted ?
The Harrop ITB's sure do look a very good peice of kit, shame it's so expensive
http://www.racetep.com/weberX.html#websynch
HTH
Andrew
The Harrop ITB's sure do look a very good peice of kit, shame it's so expensive
http://www.racetep.com/weberX.html#websynch
HTH
Andrew
02-20-2006, 10:52 PM
#10
Originally Posted by V8Touring
You guys probobly already know about this gizmo but i bought this air gauge thing to syncronize some ITB's that i had to take apart, i'm guessing that the Harrop is all ready set up/adjusted ?
The Harrop ITB's sure do look a very good peice of kit, shame it's so expensive
http://www.racetep.com/weberX.html#websynch
HTH
Andrew
The Harrop ITB's sure do look a very good peice of kit, shame it's so expensive
http://www.racetep.com/weberX.html#websynch
HTH
Andrew
On an EFI ITB, the IAC should handle the idle, and the linkage should be sync'd for part throttle operation.
02-21-2006, 04:40 PM
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David, have a read of this link for the recomended set up of some BMW M5/3 ITB's, this obviously isn't LSx related but it might be use full info ??
http://home.insightbb.com/~todd.kenyon/throttle.htm
http://home.insightbb.com/~todd.kenyon/throttle.htm
adjust, adjustment, adjustments, air, carb, carburetors, harrop, intake, itb, ls1, lsx, manifold, sychronizer, synchronization, tuning, weber
