Hello all.
can anyone tell me a method or point me to a method for setting up the idle and balancing my ITB's. I have a vacuum gauge just cant remember the procedure.
Cheers
Mark
Setting up and balancing quad twin Jenvey ITB's
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Warm engine. ( 20 mile drive so engine is fully warmed up en valve clearance is fully equal ).
Fast idle ( 1500 rpm ) so all throttle cable and rods slack is out.
Start at the last ITB and work your way back to the first one on the throttle cable.
Fast idle ( 1500 rpm ) so all throttle cable and rods slack is out.
Start at the last ITB and work your way back to the first one on the throttle cable.
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Building a GT40 mk2
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Butterflies should be slightly open, hence the 1500rpm I mentioned.mgbloke wrote:...Presuming the butterflies should be fully closed and balance airflow with the bypass.
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Fully closed is idle only and you want all the throttle blades open simultaneously.
'73 Ford Capri. 3.5 RV8, Magnacharger 110 Supercharger, Merlin F85 Heads, Water/Methanol Injected
'73 Ford F250, 6.7ltr V8
Building a GT40 mk2
'73 Ford F250, 6.7ltr V8
Building a GT40 mk2
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This is what i did..
8x vacuum cauge´s. Thanks for my friend sponsoring those cauge´s very cheaply..
I have to setup my idle vacuum for emission reason´s, then i check that high rpm vacuum is similar both side.. approx 1500rpm. In my mind better option is a road test..
I also have got special tool that i can measure throttle plate and body clearance when they are fully open..
8x vacuum cauge´s. Thanks for my friend sponsoring those cauge´s very cheaply..
I have to setup my idle vacuum for emission reason´s, then i check that high rpm vacuum is similar both side.. approx 1500rpm. In my mind better option is a road test..
I also have got special tool that i can measure throttle plate and body clearance when they are fully open..
Timo