6th gear upgrade or gearbox swap - Transmission Forum - Peugeot 306 GTi-6 & Rallye Owners Club

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Subject: 6th gear upgrade or gearbox swap

eliotrw

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Post #26

buzzbrightyear wrote:

superchargedblack1997gti6 wrote:

Cheers mate just seems like an idea to get done at the same time the straight cut gears go in. no need to use 6th until 140mph anyways so thought this should give a top speed of approx 190?

Would you really want to do 190 in a 306 though? LOL

To be fair i'd like a longer 6th anyway,
If you could cruise at 3.5k at 90mph rather than 4.1 ish it would be awesome

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Posted 20th Jan 2014 at 16:32

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superchargedblack1997gti6

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Post #27

Yes I'd do 190mph why not! not for extended period but it would certainly be an amusing tale to tell!

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Super high boost Completed, destroyer of gearboxes and 160mph club

Posted 20th Jan 2014 at 16:36

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buzzbrightyear

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Post #28

superchargedblack1997gti6 wrote:

Yes I'd do 190mph why not! not for extended period but it would certainly be an amusing tale to tell!

true I must be getting old

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andrew315rawson@live.co.uk
Moonstone phase 7 gti6
My Project thread: http://www.306gti6.com/forum/showthread.php?id=119992&page=1

Posted 20th Jan 2014 at 16:48

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pugheaven

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Post #29

Even with the amount if power we have I think you would need a bloody long road to be able to get to 190! What are our tyres rated to, the fastest iv been in Richs car was 155 and the car was all over the place, wipers were over an inch away from the windscreen and was scared they would snap off

Posted 20th Jan 2014 at 17:02

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cjm_harris

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Post #30

I think some of the high boost boys maxxed out the gearbox on the autobahn. It was 163 from what I remember.

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Chris
1999 China Gti6 Supercharged Devil

[Fun car] >>Project Thread<<
2000 Bianca 306 Diesel [Work runabout]

Posted 20th Jan 2014 at 17:06

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pugheaven

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Post #31

Ross has done it in his high boost... With the super high boost reving to 8250 the top speed is obviously higher, I'm hoping with the dimma being so wide and with better aerodynamics (more down force), wider wheels etc I will be a bit more brave and see what I can get out of it

Posted 20th Jan 2014 at 17:25

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atgti6

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Post #32

I just want to change the 6th so it's dual purpose, a toy and an every day commuter. Best of both worlds

Posted 20th Jan 2014 at 21:17

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superchargedblack1997gti6

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Post #33

167 mph is rpm limit hit with standard gearing on high boost!

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Super high boost Completed, destroyer of gearboxes and 160mph club

Posted 21st Jan 2014 at 14:00

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Niall

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Post #34

So changing 6th for a HDI 5th. How easy would this be? I've never had a gear box apart before but am willing to try anything (well within reason LOL

). Would it just be a case of whipping the end case off the box and swapping the gear or am I being simple and it's much more difficult?

Posted 21st Jan 2014 at 14:36

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superchargedblack1997gti6

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Post #35

You'll need gear pullers and new bearings mate it's worth it if you have a spare box to play with?

________________________________________

Super high boost Completed, destroyer of gearboxes and 160mph club

Posted 21st Jan 2014 at 15:12

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darkgti6

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Post #36

Niall wrote:

So changing 6th for a HDI 5th. How easy would this be? I've never had a gear box apart before but am willing to try anything (well within reason LOL

). Would it just be a case of whipping the end case off the box and swapping the gear or am I being simple and it's much more difficult?

something id talk to 'miles' about on here. He does a lot of gearbox work.

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Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m

Posted 21st Jan 2014 at 15:20

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darkgti6

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Post #37

superchargedblack1997gti6 wrote:

Yes I'd do 190mph why not! not for extended period but it would certainly be an amusing tale to tell!

if you try let me know so I can video the front bumper getting ripped off and going under the wheels LOL

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Team Peugeot Sport 308 Gti�

Black T'99 Gti - may she rest in peace - written off in a shunt on the A329m

Posted 21st Jan 2014 at 15:21

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Niall

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Post #38

superchargedblack1997gti6 wrote:

You'll need gear pullers and new bearings mate it's worth it if you have a spare box to play with?

Could get my hands on gear pullers. I do have a spare box which I've just tarted up to go in with the new engine but that's in two weeks so I doubt I'll have time to get it done before then.

Cheers guys

Posted 21st Jan 2014 at 16:17

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rallyestyle

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Post #39

cjm_harris wrote:

I think some of the high boost boys maxxed out the gearbox on the autobahn. It was 163 from what I remember.

You don't need boost to get to the max

I have hit the indicated max on the autobahn in the rallye when it was standard Yes

Also the car was perfectly stable at these speeds, it was cruising along quite nicely, certainly no problems with rattling or bits falling off Smile

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Posted 21st Jan 2014 at 16:23

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superchargedblack1997gti6

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Post #40

Trust me I think 500bhp would see 180 odd though 190 maybe need more than 500bhp. for cruising I think this conversion would be well worth the extra work to fit!

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Super high boost Completed, destroyer of gearboxes and 160mph club

Posted 21st Jan 2014 at 17:10

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prism7guy

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Post #41

rallyestyle wrote:

cjm_harris wrote:

I think some of the high boost boys maxxed out the gearbox on the autobahn. It was 163 from what I remember.

You don't need boost to get to the max

I have hit the indicated max on the autobahn in the rallye when it was standard Yes

Also the car was perfectly stable at these speeds, it was cruising along quite nicely, certainly no problems with rattling or bits falling off Smile

You've managed to hit the limiter in 6th with it n/a? - I've had 136mph indicated on my tomtom but the needle was off the clocks past 140 at the time in mine which is n/a.

I'm not convinced even with 500bhp a 306 would do above 180mph, i reckon the coefficent of drag would be too much and the gearbox would crap itself. Please proove me wrong. Yes

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Posted 21st Jan 2014 at 18:15

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dcc

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Post #42

We had a 205 hit 156mph (limiter on the ecu) - it would happily go past if it revved further I would have thought.

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Posted 21st Jan 2014 at 18:30

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dcc

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Post #43

http://www.youtube.com/watch?v=G7202xWwNQk

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205 GTI
Xsara HDI

Posted 21st Jan 2014 at 18:33

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m306

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Post #44

pugheaven wrote:

the fastest iv been in Richs car was 155 and the car was all over the place, wipers were over an inch away from the windscreen and was scared they would snap off

Was there something wrong with his car?? I seen 150 in my low boost and that was still pulling strong and felt very stable and comfortable.

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supercharged China gti6 - Thu 16th Sep 1999 - sold
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Posted 21st Jan 2014 at 19:58

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Niall

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Post #45

m306 wrote:

pugheaven wrote:

the fastest iv been in Richs car was 155 and the car was all over the place, wipers were over an inch away from the windscreen and was scared they would snap off

Was there something wrong with his car?? I seen 150 in my low boost and that was still pulling strong and felt very stable and comfortable.

The big issue with this is wheel balancing IMO. Ive done 135 in mine at Coombe before and it was s**t because the car was shaking all over the place but that was on clones which no one around here seems to be bothered to do properly. On the turinis which have been balanced well, it feels much more stable.

Posted 21st Jan 2014 at 20:02

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pugheaven

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Post #46

Nope nothing wring at all with the car... Just the driver and the screaming girlfriend I had in the passenger seat lol trying to keep the car in one lane at 155 was hard enough and then the wiper arms lifted off the screen and I just chickened out, notsure what the tyres are rated to either so just for that matter I wouldn't like to try my luck! Iv taken my bmw to 155 and it as steady as a rock but then again it has wider tyres and weighs a lot more

Posted 21st Jan 2014 at 23:03

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m306

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Post #47

Haha yeah screaming passengers is annoying and distracting.

Ive heard alot of people have had issues with clones but a good garage should be able to do them fine, mine were always ok

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supercharged China gti6 - Thu 16th Sep 1999 - sold
2010 megane rs250

Posted 22nd Jan 2014 at 07:55

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armzsc6

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Post #48

I've had various d-turbos and hdi's over the years and I'd think the hdi gearing may be a little high for a petrol engine however I remember my 1.9 d-turbos all did 3000rpm at 80mph which would be a better setup for a 6 engine I think.

I've had my stripped and lightened low boost off the clock before but never pushed it much past that. However I know the red rallye stilly had that's gone to Sweden was maxed on the autobahn on the way there and claimed he hit the limiter in 6th Wink

. Was similar spec to mine weight wise.

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Posted 22nd Jan 2014 at 10:27

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doon1988

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Post #49

Mine is in a similar position. Though to be fair I haven't monitored where my revs are but I suspect there high up like the original post - but I always get poor mileage.

I've purchased a used Lambda off ebay (from somebody on this forum) - I haven't fitted it yet but hope to do so shortly.

I've got to drive from Sheffield to Lytham St Annes at the weekend so hopefully can do it before then and see the benefits on that drive.

Posted 22nd Jan 2014 at 10:53

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armzsc6

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Post #50

Wouldn't ever fit a used lambda to be honest you have no idea if it actually works or not. My supercharged 6 does easily over 400 miles to a tank on a run on Vpower.

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Black power baby! SUUUUUPERCHARGED Superman

Posted 22nd Jan 2014 at 14:07

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