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- May 15, 2011
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Is the TwinAir a NA engine, or has it been modified for the turbocharged application like the 1.4 Tjet was over the NA 1.4 16v- ie, lower compression, steel-forged crank, forged pistons, etc?
When the Sales-guys were introduced to the TwinAir, they were shown a development engine producing silly numbers, so there's little doubt in the strength of the internals.
The only issue I can see is the strength of the gearbox. Getting a compact 'box in a 500 that can also handle diesel-like torque is a struggle, and is a factor in the TA being currently capped to 85bhp from what I know.
I get the impressionthat the gearbox on the TA is the C154 which has a theoretical limit of 150Nm. The TA in 85bhp form is outputting 145Nm so it is just under the limit. It may be also a factor in the delay in the 103bhp (I thought it was 105bhp) version - I wonder if there are plans to change to the tougher gearbox from the MJ II for the Zagata.