Thread: New heart and drive for D2

500HP SHORT MOTOR

5.0 LT STEPPED LINER
SHORT MOTOR
FORGED PISTONS 10 - 1 COMP
TOTAL SEAL RINGS
BILLET 6 INCH STEEL RODS
3.4 INCH STROKER CRANK
DUAL THRUST MAIN BEARINGS
$6900.00
500HP SHORT MOTOR



This is one I have been looking at previously.

You'll love it!

I really like the idea of the 5 litre engine as a conversion option for the under powered 4L engines in Disco's but maybe something that is more aimed as a stump puller which would suit off road driving rather then a out and out high revving top end horspower monster.

Chris has said he would also add CDL at the same time so chances are he is planning to use the new 'big engine' for off road usage rather then drag racing, sounds like he is really after a stump puller as well.

One question how can any engine builder claim 500 hp for a short engine?

In my experience of getting high horsepower engines built most of the gains other then adding cubic inches is usually in cylinder head work which often takes up the most time and effort to achieve the right results. Its hard to imagine standard Rover heads allowing such gains even with the size and compression increase spoken off, unless your bolting on a blower then you wouldn't have such high compression or a wild cam.

I'm more then happy to stand corrected if someone can explain to me how this works.

cheers,
Terry

Originally Posted by TerryO

One question how can any engine builder claim 500 hp for a short engine?

Its hard to imagine standard Rover heads allowing such gains even with the size and compression increase spoken off, unless your bolting on a blower then you wouldn't have such high compression or a wild cam.

Aftermarket heads?
http://www.triumphroverspares.com.au...0&productid=70

Originally Posted by TerryO

I really like the idea of the 5 litre engine as a conversion option for the under powered 4L engines in Disco's but maybe something that is more aimed as a stump puller which would suit off road driving rather then a out and out high revving top end horspower monster.

Chris has said he would also add CDL at the same time so chances are he is planning to use the new 'big engine' for off road usage rather then drag racing, sounds like he is really after a stump puller as well.

One question how can any engine builder claim 500 hp for a short engine?

In my experience of getting high horsepower engines built most of the gains other then adding cubic inches is usually in cylinder head work which often takes up the most time and effort to achieve the right results. Its hard to imagine standard Rover heads allowing such gains even with the size and compression increase spoken off, unless your bolting on a blower then you wouldn't have such high compression or a wild cam.

I'm more then happy to stand corrected if someone can explain to me how this works.

cheers,
Terry

I use my D2 almost every day for a variety of uses, Monday to Friday it is a run around car for work and weekends it gets used a bit better either;

4wding (Usually atleast once per month)
Towing Jetski either to Somerset or Rainbow Bay
Soon to be towing 20' ski boat out to Somerset
Towing Dual Axle Trailer for camping etc. with the wife and kids

I am after a motor that has more power than the 4.0l, however lots of torque for offroad use as this is still the main reason I bought the Disco and in turn easier towing especially on hills etc. with the ski boat.

Any ideas on the best setups would be great, due to the money involved I would like to get this right the first time.

Is there a Rover V8 Diesel that would be a relatively simple swap?

I think TRS are saying with the right heads and cam this short motor is capable of producing and handling 500hp.

This motor could be a very strong toquey motor with right head and cam combination and I would think that TRS are probably the people to talk to about what that combination should be. Even if the peak output is only 300hp this would be much better than standard

Hey Chris,

A good recoed top hat 4.6 long engine from TRS might be the go just over half the price of the short 5L yet still has a very healthy increase in torque and HP over the standard 4L.

Edited ...(I should have mentioned that they take your old 4L Thor long engine as an exchange or it costs more.)

If you call them make sure you speak with Phil he is very helpful.

cheers,
Terry

The email I got from TRS said, with the 4.9 stroker kit,
a 25% increase in torque is expected,,


sort of makes sense if you increase the capacity by 25%