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Virtual 427FE/TKO installation into Autokraft Mk IV
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Virtual 427FE/TKO installation into Autokraft Mk IV
Currently removing the 302 EFI from my ‘93 Autokraft Mk IV, in readiness for the all alloy 427FE, RM-6057 and TKO 600, sitting alongside, awaiting installation. As the car is built, complete with composite internal footwell/trans tub that cannot realistically be removed, installation is not so straightforward. The car is RHD and that makes the 1/2" offset motor vs. footwell space a big issue, as is driveshaft angle. I'm currently optimised at 4 degrees, whereas the original Mk IV runs at 6 between the UJ's. It's a far bigger compromise than LHD, where everything works in your favour. Anyhow, to help anticipate as many problems in possible, yesterday I painstakingly and accurately measured up the drivetrain and converted the data into a CAD drawing. Maybe somebody else will find useful |
Regarding the 1" plan offset: There's nothing magic about having the driveshaft straight back in the top view. As long as the front and rear U-joint angles are approximately equal, everything will work perfectly. In fact, the driveshaft will last longer when you don't keep everything in a line.
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The axle pinion (Salisbury/Jaguar IRS) is offset 1” to the right of the chassis ccentreline. In a RHD car if I offset the motor the full inch, the motor encroaches too much into the footwells. So setting it 1/2” is the best compromise as I cannot do anything about the vertical offset as that’s governed by the engine clearance. I’d like to mount the engine central, but that makes the driveshaft nearly 10 degrees which is too much.
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Don't forget that for orthogonal offsets, they are not additive. The net offset is
Z=sqrt(x^2+y^2) |
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