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Torque Estimate For This Rb26 Engine Spec?

Chris Wilson

By Chris Wilson,
in Engines & Forced Induction

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Chris Wilson Proficient

Chris Wilson

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Any ideas on what sort of flywheel torque figure I might get from:

RB26, stock bore and stroke, Tomei 280 degree 10.8 mm lift cams, pair of Garett 2860-10 turbos on ported stock manifolds, head ported on stock valve sizes, stock size ported TB's, Siemens 800 cc injectors, Tomei cooling gallery pistons, 8.5 to 1 CR, Tomei rods, steel crank, N1 block, mapped on both pump and 118 octane race fuels, running M800 Motec. I need to see what I need gearbox wise. Engine is going in a 2WD car. Thanks.

The Dan Grand Master

The Dan

Posted
Posted
Any ideas on what sort of flywheel torque figure I might get from:

RB26, stock bore and stroke, Tomei 280 degree 10.8 mm lift cams, pair of Garett 2860-10 turbos on ported stock manifolds, head ported on stock valve sizes, stock size ported TB's, Siemens 800 cc injectors, Tomei cooling gallery pistons, 8.5 to 1 CR, Tomei rods, steel crank, N1 block, mapped on both pump and 118 octane race fuels, running M800 Motec. I need to see what I need gearbox wise. Engine is going in a 2WD car. Thanks.

The strength of a gearbox will never change but it depends on what car you are putting it into. Put it in a Datto ute and you can probably double the torque going through it.

For that setup, considering torque is usually relative to hp, you will most likely top out at around 700-750nm. The setup is not really capable of much more than that but put a bigger set of turbos and bigger injectors and that figure will go up

STATUS Grand Master

STATUS

Posted
Posted (edited)

In real torque figures 550-600 wheel NM. A 7.2 litre cat diesel makes around 800nm atw now way you will reach a tonne.

Edited by URAS
aphid Proficient

aphid

Posted
Posted

How does one double the torque output of an engine by putting it into a lighter chassis?

The strength of a gearbox will never change but it depends on what car you are putting it into. Put it in a Datto ute and you can probably double the torque going through it.

For that setup, considering torque is usually relative to hp, you will most likely top out at around 700-750nm. The setup is not really capable of much more than that but put a bigger set of turbos and bigger injectors and that figure will go up

The Dan Grand Master

The Dan

Posted
Posted
How does one double the torque output of an engine by putting it into a lighter chassis?

You don't. What I am saying is that the torque required to break that gearbox will change depending on the weight of the car it is in. If it's in a datto ute it will require a lot more torque to break it than if it were in a 4 tonne truck.

Chris Wilson Proficient

Chris Wilson

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Before this turns into a bun fight, I did ask for a torque figure at the flywheel :ermm: Units we are measuring in will help, I am in the UK and still work in Imperial (lbs / foot torque) so need to convert :) Cheers.

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