52 IDA idle out of control

[vwinnovator]

Running some 52 IDAs

200air
180main

55 f10 idle w/120

Throttles fully closed

Timing 8° btdc

Fuel pressure 2.5psi

No vacuum leaks

50mm intakes 2332cc FK89, 11:1

Idle is out of control shooting from 4-5000rpm
Throttles fully close, screw not even touching

What / where is feeding fuel to rev out of control?

[QRP]

This may be a silly question but is your linkage disconnected??

[Dan Ruddock]

Fuel alone would not do that, must be getting air too. Check for leaks

[Ohio Tom]

sounds like it sucked in an intake gasket.

Also, I have seen on 51.5 (empi) that the cam for the accel pump on the throttle shaft will hit the casting and prevent the throttle plates from closing all the way. A few minutes with a dremel fixes that problem.

Flip the carb over and look for this issue...

[oprn]

Mine did that with a bad intake to head gasket.

[vwinnovator]

bent throttle shafts

[King_vw61]

I had bent new shafts also. Geers fixed them. Sucked to have a new set of custom 52’s from a well known builder and they need to be re done by geers. 2k you think they would be perfect. Oh well live and learn.
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1961 Ragtop, Autocraft 2783cc for street/strip 10k miles and counting...230.84 HP to the wheels thru Muffler 13.4 to 1 on E85
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