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| Re: Has anyone done the VL commo auto swap? |
Subject: Re: Has anyone done the VL commo auto swap?
by ddgonzal on 2017/1/14 5:35:37
The biggest problem I foresee with a 4N71B swap is slower acceleration. All the torque converters are made for larger engines, so the A12/A14 won't spin it up very far. The gears are exactly the same ratios (1st, 2nd, 3rd) so no advantage there
Solution: For adequate initial acceleration, use a stiff rear diff gear, maybe 4.625 out of Datsun 1000 Ute. With the .686 overdrive it'll still run lower revs on the highway compared to a 4-speed manual with stock 3.9 gear
You could also order a custom torque converter for a small engine (the stock 3N71B converter can't be used in a 4N71B due to the lockup interface). This will help greatly with take-offs, but not with accelerating the car once at road speeds
Best combo might be:
* Custom medium-stall converter for low-torque engine
* 4.11 gears from Datsun 1000
* 4N71B with overdrive
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