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Bearzah · 10-29-2013, 01:20 AM

I'm looking for build suggestions with a 48mm Weber IDA on a ported 12A.

It's on a heavily street-ported 12A with free-flowing exhaust. The car is a road-race car regularly seeing 7000-8000rpm.

Currently, the carb is in great shape. Freshly rebuilt, evidence of ported chokes (guessing ~43mm) and polished bores.

Current setup:
Main jet - 230
Emulsion tube - F11
Air corrector jet - 170
Idling jet - F10/70
Idle jet holder - 120
Pump jet - 60

At this point, the car FALLS on its face at part throttle and under crisp throttle opening. The spark plugs show lean, but, car still pulls strong at full throttle. Although, on long 4th gear pulls, the car seems to be running out of "steam".

What I'm looking to do is install a more realistic choke tube, high-flow 300 needle and seat and put together a better-fit carb setup.

Looking for pointers from experienced IDA guys.

Thanks... and BRAP on!!!

10-29-2013, 01:20 AM	#1
Bearzah The Newbie Join Date: Dec 2010 Posts: 3 Rep Power: 0	Seeking Weber IDA Knowledge I'm looking for build suggestions with a 48mm Weber IDA on a ported 12A. It's on a heavily street-ported 12A with free-flowing exhaust. The car is a road-race car regularly seeing 7000-8000rpm. Currently, the carb is in great shape. Freshly rebuilt, evidence of ported chokes (guessing ~43mm) and polished bores. Current setup: Main jet - 230 Emulsion tube - F11 Air corrector jet - 170 Idling jet - F10/70 Idle jet holder - 120 Pump jet - 60 At this point, the car FALLS on its face at part throttle and under crisp throttle opening. The spark plugs show lean, but, car still pulls strong at full throttle. Although, on long 4th gear pulls, the car seems to be running out of "steam". What I'm looking to do is install a more realistic choke tube, high-flow 300 needle and seat and put together a better-fit carb setup. Looking for pointers from experienced IDA guys. Thanks... and BRAP on!!!