i30 Owners Club

MODIFYING OR DETAILING YOUR I30 => ENGINE BAY => Topic started by: Ebrahim19 on March 14, 2012, 13:36:11

Title: is it possible to change gearbox from 5sp to 6sp
Post by: Ebrahim19 on March 14, 2012, 13:36:11: i am just wondering is it possible to change the 5 speed gear box to a 6 speed without changing the engine or do you have to change the engine????
Title: Re: is it possible to change
Post by: Shambles on March 14, 2012, 13:38:00: Here's a previous discussion, sort of... :)

https://www.i30ownersclub.com/forum/index.php?topic=11642 (https://www.i30ownersclub.com/forum/index.php?topic=11642)
Title: Re: is it possible to change
Post by: Dazzler on March 14, 2012, 20:09:20: Quote from: Ebrahim19 on March 14, 2012, 13:36:11
i am just wondering is it possible to change the 5 speed gear box to a 6 speed without changing the engine or do you have to change the engine????

Welcome Ebrahim.. None of our members have done it as far as I am aware. Suspect the cost would be prohibative and there would/could be warranty issues... :disapp:
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: Phil №❶ on March 14, 2012, 20:23:33: Welcome Ebrahim19,

It would be better to purchase a 6sp car, as all the necessary changes, even the ECU, are performed at the factory when assembled. :neutral:
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: Ugly Mongrel on March 15, 2012, 10:34:35: Welcome Ebrahim. I think it would be possible but only if the car wasn't moving. :rofl:
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: agentr31 on March 15, 2012, 10:51:47: LOLOLOLOL!!

i personally dont see why not... just find a 6 speed wreck and BAM the dirt is gone!
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: Asterix on March 15, 2012, 20:55:45: 20 years ago when I got my first car, a 1978 VW Passat, I changed the engine with one from a VW Scirocco, and later changed the stock 4 speed gearbox with a 5 speed.

I wouldn't dare any of this in a modern car with all the electronics build in.

But please let us know if you decide to make the change... :razz:
Title: Re: is it possible to change
Post by: hmca on April 03, 2012, 02:34:42: Quote from: Shambles™ on March 14, 2012, 13:38:00
Here's a previous discussion, sort of... :)

https://www.i30ownersclub.com/forum/index.php?topic=11642 (https://www.i30ownersclub.com/forum/index.php?topic=11642)

Howz this for a dream!!!

http://www.holinger.com.au/pdfs/sf.pdf (http://www.holinger.com.au/pdfs/sf.pdf)

Probably the best improvement you can make to a i30 race/rally car after you send it to Jenny Craig.
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: freakzoide on May 19, 2012, 13:31:29: Taking a look at the parts software it's clear that the 5 and 6 speed gearbox have the same mounting bolts, so it would probalbly a plug&play fit.
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: Phil №❶ on May 19, 2012, 14:32:04: Mechanically that may be so, but I suspect the ecu would require updating too. :neutral:
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: Lakes on May 19, 2012, 21:10:05: why would ecu need to know? all it is, is gear ratio & manualy shifted. only thing if ecu controls speedo that might be so.
Title: Re: is it possible to change
Post by: Dazzler on May 20, 2012, 00:37:08: Quote from: hmca on April 03, 2012, 02:34:42
Quote from: Shambles™ on March 14, 2012, 13:38:00
Here's a previous discussion, sort of... :)

https://www.i30ownersclub.com/forum/index.php?topic=11642 (https://www.i30ownersclub.com/forum/index.php?topic=11642)

Howz this for a dream!!!

http://www.holinger.com.au/pdfs/sf.pdf (http://www.holinger.com.au/pdfs/sf.pdf)

Probably the best improvement you can make to a i30 race/rally car after you send it to Jenny Craig.

Any idea of cost??
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: Phil №❶ on May 20, 2012, 02:49:43: Quote from: Lakes on May 19, 2012, 21:10:05
why would ecu need to know? all it is, is gear ratio & manualy shifted. only thing if ecu controls speedo that might be so.

What about the fuel injectors, aren't our cars pre-programmed for economy / performance. I've read where remapping has been performed to gain performance, so wouldn't some extra info be required for 6th gear. :neutral:
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: Pip on May 20, 2012, 11:30:05: Quote from: 847563 on May 20, 2012, 02:49:43
Quote from: Lakes on May 19, 2012, 21:10:05
why would ecu need to know? all it is, is gear ratio & manualy shifted. only thing if ecu controls speedo that might be so.

What about the fuel injectors, aren't our cars pre-programmed for economy / performance. I've read where remapping has been performed to gain performance, so wouldn't some extra info be required for 6th gear. :neutral:
Interesting idea. I was almost going to post the same question that Lakes did. To take notice of the gear would need sensors (switches) to identify which gear. I assumed it did not apart from reverse of course to turn on the reversing lights.

Lakes' observation re the speedo is quite valid depending where the sensor is. Surely it's on the front axle though in which case it only needs to be considered if the front tyre circumference is changed.

As an aside, I was in Jaycar yesterday and their kit that allows adjustment/correction of the speedo was $55 from memory.
Title: Re: is it possible to change gearbox from 5sp to 6sp
Post by: freakzoide on May 23, 2012, 15:47:28: The ECU only looks at the speed, Rpm and throtle position... adding a new gearbox wouldn't change anything.