Which NG3 is this?

[TurboFource]

Can anyone tell me which NG3 this is?

[BDA]

The tag will have the type of tranny (NG1, NG2, NG3, or NG5). Then there will be a “suffix” that will be three digits which tells you what ratios it has, and then there will be a serial number. Here’s a manual that tells you more: http://lotus-europa.com/manuals/misc/ng.pdf

[TurboFource]

I don’t see a 065 (?) in that list 

[BDA]

There's another manual with a larger list of suffixes (http://lotus-europa.com/manuals/misc/MRBVNG.pdf) but I don't see 065 anywhere either. Maybe I missed it? There is a 065 and 067! Does it say NG3 on it?

[Blitzen]

065 is in last section, for USA & Canada ratios . Page 13 of the NG manual

[TurboFource]

Thanks Blitzen! What is vehicle 136A ? A Fuego of some sort I assume?

[BDA]

I couldn’t find a reference to 136A in either of the manuals but I found it here (https://vehicleidentificationnumber.com/vin-decoder/renault-car.html). It’s a 1600cc Turbo Fuego.

[TurboFource]

So, this is worth pursuing?

[BDA]

Absolutely!

[TurboFource]

Still working out the details on this in case the 352 transaxle doesn't like having a turbo hurrying it along .... 

[BDA]

Aren’t the number of planet wheels an indication of how much torque the box will take? The 336 and 352 have two I believe and the 365 and NG3 have four. Interestingly, in their SCCA racer, Jensen Motors used a 336 with straight-cut non-synchro gears. Are you expecting to generate much more torque than a race engine?

[TurboFource]

Boost usually bumps up the torque!

[Kendo]

I thought the 365 also only has 2 planet gears. I have a 365, so I want to be clear about this for future reference.

[BDA]

Agreed, but any idea how much?

Wild ass guessing, they got in the neighborhood of 200bhp at 8000rpm. Obviously hp and torque peaks happen at different rpms but I think we can expect that the torque does not fall off a cliff so the torque at 8000rpm is in the neighborhood of 130 ft-lbs.

T=hp/rpm    rpm is in radians/sec  (6.28 * 8000/60)
                   hp is 550 ft-lbs/sec (200 * 550)

Since Jensen didn’t mention any maintenance on the tranny, we might conclude it was not a weak point and their 336 could handle more torque. Arbitrarily, maybe 150 ft-lbs might be a reasonable upper limit…

If all that is reasonable, maybe we could expect an NG3 to handle over 200 ft-lbs.

Just as a comparison, my BDA maxes out at 125 ft-lbs and generates 177bhp @ 7500rpm.

edit: obviously all math and assumptions checks are welcome!

[BDA]

Kendo, check Fig. 69 on page 36 of the manual (http://lotus-europa.com/manuals/tcwork/f/tcf.pdf).