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Lotus Europa Forums => Garage => Topic started by: StrawberryCheesecake on Monday,July 04, 2016, 12:50:04 AM

Title: UN1 Gearbox Conversion
Post by: StrawberryCheesecake on Monday,July 04, 2016, 12:50:04 AM

In the course of hunting for an NG3 gearbox, and I still think I've got one on the way, I bought a UN1-013 box because it was at a good price.

I think it's originally R21 Turbo

My bell housing doesn't fit this box, so I'm not sure whether to try and use it or not.

Has anyone used a UN1 on a Europa, or looked at it? I think I can easily get my money back if I don't use it.

Title: Re: UN1 Gearbox Conversion
Post by: jbcollier on Monday,July 04, 2016, 03:21:51 AM

Used in Espirits, Deloreans, many GT40 replicas, etc.  Better ratios than the NG series (3.4 first gear).  Here are sites with some info:

http://www.gt40s.com/forum/gt40-tech-powertrain-transaxles/39425-renault-un1-transaxle-everything.html

http://www.rs200replica.co.uk/assets/applets/UN1.pdf

What engine are you wanting to bolt it up to?

Title: Re: UN1 Gearbox Conversion
Post by: 4129R on Monday,July 04, 2016, 05:41:55 AM

http://www.zetecinside.com/xr2/archive/2005/dec2005.shtml

Title: Re: UN1 Gearbox Conversion
Post by: StrawberryCheesecake on Monday,July 04, 2016, 05:53:06 AM

It's going with a Zetec 2.0 if I can find the bits to fit it.

Title: Re: UN1 Gearbox Conversion
Post by: LotusJoe on Tuesday,July 05, 2016, 12:39:01 PM

I'm pretty sure that is the same gearbox in the Citroen SM.

Title: Re: UN1 Gearbox Conversion
Post by: StrawberryCheesecake on Tuesday,July 05, 2016, 10:49:08 PM

Quote from: lotus-62 on Tuesday,July 05, 2016, 11:04:20 AM

I have a un1-013 in my banks62, it is a lot bigger than the ng3 (heavier too) overkill for the zetec,

It may get some extra horses in the future :-)

What bell housing, flywheel, clutch and starter are you using?

Title: Re: UN1 Gearbox Conversion
Post by: StrawberryCheesecake on Thursday,July 07, 2016, 01:41:12 AM

Thanks for the info, but please can you clarify what ca18det is code for?

EDIT:
Cancel that, found it!

https://en.wikipedia.org/wiki/Nissan_CA_engine

Is that the engine you're running then?

Title: Re: UN1 Gearbox Conversion
Post by: StrawberryCheesecake on Tuesday,July 12, 2016, 08:22:22 AM

Yep... paid less than that for it. I expect I've missed an opportunity to make more out of it, but I'm not really worried. I've covered my purchase cost and travel expenses.