Gearbox Specialists - In da Saaf

[luckyp]

Guys,

To stick in the new gears and do the diff swap. Any suggestions?

Anyone used Carrera Performance in Horsham?

Cheers

Pete

[DHGTR]

Pete

i guess it depends on your norf/souf divide line but Bob Watson near Banbury is very good but not cheap. They/he looks after the Silverstone Porsches, rebuilt/removed 4wd on my G64.

dave

[BogBeast]

Or www.autofarm.co.uk/

Which maybe a bit closer to you. Also not cheap IIRC (bit of a common theme when it comes to Porche..)

[GTWayne]

P, YOU know who to use, now get in your Nissan, get yourself up to Aylesbury and go visit Neil. The idea of PH is to learn from folk who have had experience in such matters and if the required specialist happens to be close to home then BINGO, you are on a winner, if not, tuff titty, post it or take it personally to the specialist.

[luckyp]

He wasn't to impressed by my choice of diff......and you know, you wouldn't wanna hire say a builder for example, who wouldn't touch your choice of say, fenestration, with his?? Would you?

And leave my Nissan out of this.............

Lucky.

[GTWayne]

P, I hear what you say but don't be put off by what Neil said, he speaks his mind as do most folk that know their onions but he is still in the business of building gearboxes and no matter what parts you choose to fill it with, I am confident that you will not get a better job done by a better builder (I have not come across one yet anyhow).

[LuckyP]

I'll give him one more try then.

Indecisive? Moi? Don't think so.

Engine arrived at Amerspeed a cuple of days ago. He's looking at it next week.

Hmmm....

[peterpsg]

While we're on this subject, anyone know of a place making longer 6th gears for the G50-20/21 boxes???

[LuckyP]

Have you tried Roger at PHII?

[steve_d]

peterpsg said:

While we're on this subject, anyone know of a place making longer 6th gears for the G50-20/21 boxes???

Been discussed recently including price.
Seems the same gear will go in as 6th in a 6 speed or fifth in the 5 speed.

Steve

[peterpsg]

steve_d said:

peterpsg said:

While we're on this subject, anyone know of a place making longer 6th gears for the G50-20/21 boxes???

Been discussed recently including price.
Seems the same gear will go in as 6th in a 6 speed or fifth in the 5 speed.

Steve

Steve, can you PM me some more details/costings...

cheers
Pete

[LuckyP]

Next years V-Maxs are gonna be a hoot!!

First Ultima to (a witnessed and verified) 200mph wins a prize!!

Lucky

[LuckyP]

Just outta interest, who has already taken their Ultima through a speed trap at 200+

How fast , where and when?

Pete

[steve_d]

GT2Racers Spectrum5 web site says on a run in 2001 they topped at 225 in fifth with another gear to go.

Steve

[steve_d]

peterpsg said:

steve_d said:

peterpsg said:

While we're on this subject, anyone know of a place making longer 6th gears for the G50-20/21 boxes???

Been discussed recently including price.
Seems the same gear will go in as 6th in a 6 speed or fifth in the 5 speed.

Steve

Steve, can you PM me some more details/costings...

cheers
Pete

I thought the price was in the other thread but it seems not.

The gear is from PHII and is a ratio of .688. which in my G50/20 would replace a .755. In theory this would give me 225mph @ 7000rpm.

Luckp has just bought one of these gears so may be willing to post the price.

I'm told it lives in the very back housing of the box so in principal it should be possible to change the gear with the box still in the car. Put the back up on stands and you may not need to drain the oil.

Steve

[luckyp]

steve_d said:

peterpsg said:

steve_d said:

peterpsg said:

While we're on this subject, anyone know of a place making longer 6th gears for the G50-20/21 boxes???

Been discussed recently including price.
Seems the same gear will go in as 6th in a 6 speed or fifth in the 5 speed.

Steve

Steve, can you PM me some more details/costings...

cheers
Pete

I thought the price was in the other thread but it seems not.

The gear is from PHII and is a ratio of .688. which in my G50/20 would replace a .755. In theory this would give me 225mph @ 7000rpm.

Luckp has just bought one of these gears so may be willing to post the price.

I'm told it lives in the very back housing of the box so in principal it should be possible to change the gear with the box still in the car. Put the back up on stands and you may not need to drain the oil.

Steve

0.688 was $712 and I got an OE 0.967 to replace my 4th for $495.

I was just concerned that I would drop outta the 4000s when changing from stock fourth to custom fifth if I didn't bridge the gap.

Pete

[peterpsg]

Hmmm... might just suit my 383's power band...

considering I hit max torque at 5100 rpm (~150mph), and max power at 6100rpm (~180mph) with the current g50/21 ratios... (in 6th)

P

[peterpsg]

steve_d said:

[quote=peterpsg][quote=steve_d][quote=peterpsg]
I'm told it lives in the very back housing of the box so in principal it should be possible to change the gear with the box still in the car. Put the back up on stands and you may not need to drain the oil.

Steve

Ok, sounds good, esp after waiting 3 days for 3 & 1/2 liters of 70/90 to go thru a 1mm wide fu%%ing hole...

[peterpsg]

I found these figures for the g50/20 & 21 on the net...

Gear G50/20 G50/21
1 3.818 3.818
2 2.047 2.150
3 1.407 1.560
4 1.110 1.242
5 0.921 1.027
6 0.775 0.820

Makes for an interesting comparison, I think the G50/20 is the US version and the 21 is the EU version...

Anyone know what the ring & pinion ratios are?

[steve_d]

peterpsg said:

I found these figures for the g50/20 & 21 on the net...

Gear G50/20 G50/21
1 3.818 3.818
2 2.047 2.150
3 1.407 1.560
4 1.110 1.242
5 0.921 1.027
6 0.775 0.820

Makes for an interesting comparison, I think the G50/20 is the US version and the 21 is the EU version...

Anyone know what the ring & pinion ratios are?

Yes those are the correct ratios and their origins. My G50/20 is American 993.
The ring/pinion ratio is 3.444 on almost all G50s

Steve