what options are there available to cope with 400-450 bhp?

 

Front diff:
QuaifeThickwall casing & ATB diff, shot peen CWP, around £1400.00+vat built

Gearbox:
Quaife or Fixit big tooth gearset (shot peened), 50Nm centre VC, around £3500.00+vat built

Rear diff:
Amazingly resilient, leave it alone, it might never fail. Deal with it if it does (fail)!

 

What about for 450-500bhp?

 

Well, what about 350-400 .


Dave.

 

what about 300-350???


Jake
(seriously)

 

Jake,

think the standard stuff can just about cope with that power.



Dave.

 

What about 500+

Bernie has all the answers!

 

I think this thread should go in the FAQ's

A quality, no-nonsence reply from Bernie

 

Dave...

Please remember... this is me you are talking about- I am not normal.
Ask Karl

J

 

Don't drive that easy myself and all has been well on my cars.

A good few hard track days too.



Dave.

 

Sweet...

I went out in a standrad car the other day. If the box was made of chocolate I doubt it would break it..

Just concerned about the 300-350 mark as I tend to drop the clutch at 5k almost all the time

J

 

up for the master

 

At 350bhp I would be inclined to leave everything standard, and wait to see what breaks first.
After all, whatever you break, and as a result choose to upgrade, then you'll be replacing with new bits anyway

A lot depends on how you drive, and I won't bore you with too much science, but avoid full throttle at maximum torque rpm whilst in 3rd gear. This'll prolong the life of your gearbox. Avoid drag-strip style launches, this will give your front diff a fighting chance

 

Bernie, just so that us 4x4 cossie owners know what we will need on our transmission shopping list before we build out mental engines, could you please list what parts and prices you would recommend for:

1. 350 - 400 bhp upgrade

2. 450 - 500bhp upgrade

3. 500+ upgrade

Many thanks!

 

the prices..are these all in...or are these the prices for the stuff alone...

 

smit's got a stage 1 bernie box in his stage 3 cosie and thats done fooking well

shings speak to smit as hes not shy with driving ( not fooking shy at all )

 

the top and bottom of it is , that if your gonna have a powerful engine - have a powerful transmission to cope, too many people spend all ther emoney of mega hp upgrades then moan when the transmission fooks up

 

 

 

 

Sorry, fook knows what happened then!

 

Hybrid, Bernies answers are in THIS post so I don't know why you keep posting it back UP!

 

Hybrid,
Just to clarify, the same components that Bernie mentions for 400-450bhp, are the same for 450-500bhp. Above 500bhp, the Fixit kit is slightly more resilient, but uses a standard OE first gear, so drag starts aren't recommended with over 500bhp.

 

2nd gear launches it is then

 

Thanks Mike!

With all due respect Porkie, Bernie does not mention in this post that his transmission recommendations will handle more than 450bhp.

I just wanted a price on a transmission upgrade so I can plan my future engine rebuild and wanted myself and others to benefit from Bernie's answer.

I know, I know..... To ring Bernie would of been a quicker option.

Better get saving for the Reyland Skyline box conversion then!

 

Want to know what's included in the Fixit gearkit or the Quaife one.

Is it just the wheels or also the shafts etc...
What happens with the main input shaft from both?

 

Hybrid, the liner box does seem the more sensible option TBH

 

The input shaft is replaced on both. The standard main shaft is retained on the Fixit kit, not sure about the Quaife (Bernie will know though).

See pictures on my website of the Fixit kit for an idea of what you get...

 

what can the mainshaft take before it brakes.....

 

What is the "50 nm center VC"? how much nm is the standard one, and what kind of hp is it god for?

edit: bad english

 

700+bhp and almost a full season's drag racing...

 

Whats the availabilty on the fixit kits Mike?

 

Benn,
He is about to produce 25, I am waiting to hear how many I can get hold of....

 

mike,

he has been producing the 25 for over 6 months mate, they still aint done and ive spoken to him direct as i wanted another as a spare. i don thtink we will see any this year

 

Ranj,
I'm an eternal optamist . Oh well, will wait and see what he says then .

 

 

what part fails on the quaife? im sure you can engineer around this problem?

 

bttt

 

So what about the viscous coupling (spelling)?

I have a fix it gear kit. It also comes with a all steel bearing, I think it was the input shaft bearing.

 

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