Standard Gear box running 10 to 15psi engine
Turbo Mini Forums

whats the sort of life time on a standard gear box running alot of power and boost. Has anyone any thoughts on this and has anyone built a short motor and used the standard gear box. Any probs to talk about thanx

http://www.Zeemax.com

Hi,
10psi is possible on standard box and drops if built well / carefully. Haven't tried it yet to see how long it lasts, but it will obviously depend on how you drive it. 4 pin diff essential though!
Cheers,
Gavin :)

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As Gavin stated. Only thing I can add is that heavy standing start sprints will not do it any favours.

I am building a car currently that will be running around 10psi and using a standard box and drops, carefully built with a 4 pin diff.

Much above 10psi and the resultant torque will put the standard box past it's useful limit.

If it's a decent engine build and you run 15psi through it I'd advise doing the test run up hill .... will make it much easier to push the car home

Every day is a school day ...........

How fast and how expensive ...... the same question...

Hi,
PMSL Roger :):):):) Uphill, lol.
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

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BIR1 was fitted with a helical box and SC drops for as long ias Mark owned it. Seemed to cope OK, although it was worn when I rebuilt it with an SC kit. If you build it right, and tear it down to reset clearances every once in a while, I think you'll do fine.
Mark??

weak links as roger stated drop gears diff

I broke many diffs and input shaft gears when on a std A+ box..

I never once did damage to standard drop gears though ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Im running a standard box with drops and and minispares cross pin diff with 10psi at the moment and goin upto 15psi next weekend, So far it has been ok had it runnin for about a year of hard weekend driving and some santapod avonpark action, I am waiting for it to go pop! But atleast i know that i should be producing some good power :cool:

Edited by Star Mag on 10th Apr, 2007.

Thanks for the advice any thought on budjet and where buy? much to chance puting a 4 pin diff on or does it make up same as the standard

http://www.Zeemax.com

you wand the minispares x pin diff

contact minispares north ask for richard

had a word with that chap from mini spares benross and he couldnt tell me when he was getting anymore sounded like didnt really want to sell one any other good firms anyone knows.

http://www.Zeemax.com

moss car spares

they may have one in but you will pay a bit more

Evolution X Pin diff

anyone else????

Edited by BENROSS on 10th Apr, 2007.

Min-Its ... ask for a 4 pin diff and they will sell you a Tran-X one .... easily the equal of the Minispares item.

Every day is a school day ...........

How fast and how expensive ...... the same question...

Mines a Tran-X...

I recall it being a very very nice piece indeed.

Better than the Withy crap I broke twice..dont think they exist anymore anyway.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

52000 kms with pre A+ box and std drop gears, 4-pin diff and 2,95 gears. Still in pristine condition. No hard launches but lots of right foot on the road. Boost first at 10 psi, currently at 15 psi.

sounds like its going to last i've order one off avonbar so we will see what comes what you mean 2,95 gears ???

http://www.Zeemax.com

I think he's refering to the final drive ratio.

WWW.TURBO-MINI.COM

Yes, final drive ratio is 2,95.

sorry lads i dont get what that mean in realationship to what???

http://www.Zeemax.com

Hi,

I bought an Avonbar 4 pin diff and although I've not road tested it yet the build quality seems excellent.

Regarding "final drive ratio", this refers to the gear ratio in the differential. If the final drive ratio is 4.10, then the ring gear has 4.10 times as many teeth as the input pinion gear.

It's all fun and games until someone gets hurt... Then it's hilarious!

Should i think about getting one my self then ,even if im gonna run at about 8 (psi) is this the sort of thing to get ?

http://www.minisport.com/classic-mini-shop...pe-product.html

Are they easy to fit ?

Shit Happen's

At 8 psi the standard diff wont last long in my experience. Thats the Minisport 4 pin diff for sure which I've heard is OK. I'm a mediocre DIY mech and fitted it mine with the help of my Haynes manual. You could also try this DIFFERENTIAL PIN AND BUSHED PLANET WHEEL DIFF KIT as a slightly cheaper alternative http://www.minispares.com/Product.aspx?pid=35923

It's all fun and games until someone gets hurt... Then it's hilarious!

thanx i built up and putting back in just not sure if theres anything i have to do before i put it in like is the gear in the same place and does it matter

http://www.Zeemax.com

To be honest i wouldnt bother Mini_UK save some money and just get a cross pin, the yearn for more power will come and then you will have to buy one anyway :)