How close?

Afternoon to all the knowledgeable guru's in landyzone.

Just wondering as to how close to the limit is the gearbox on the 4.6.

That is, is there any room for increased performance. Or is it already bordering on fragile?


Dave

I thought the HP-24 was pretty robust but didnt think you could do much tuning with the Thor?

Well apart from going stupid and sticking turbos on it lol

Got the chance of a full top hatted block with crank, pistons, and piper cam. But it's a 4.8 not a 4.6.

HP24 is able to cope with a good bit more urge than the 4.6 gives.

Oh that's good to know.
Thanks Keith.

Fancy having a go at building it up knowing it will be right from the start. Then rebuilding the original lump and selling it. Might do a gearbox as well

Got the chance of a full top hatted block with crank, pistons, and piper cam. But it's a 4.8 not a 4.6.

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ummmm..... sounds interesting, would probably go down this route if my liners ever go south. You having problems with yours or just fancy an upgrade?

sas1810 said:

Well apart from going stupid and sticking turbos on it lol

Got the chance of a full top hatted block with crank, pistons, and piper cam. But it's a 4.8 not a 4.6.

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The transmission will cope no problem - if you're a Thor engine the Bosch motronic might not like the cam very much, the Thor FI system is very sensitive to increased cam overlap upsetting inlet pulses which causes fuelling glitches.

martynv8 said:

ummmm..... sounds interesting, would probably go down this route if my liners ever go south. You having problems with yours or just fancy an upgrade?

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Just something I fancy having a go at. Managed to find 1 that obviously has all 8 top hats done.

StuckAgainSteve said:

The transmission will cope no problem - if you're a Thor engine the Bosch motronic might not like the cam very much, the Thor FI system is very sensitive to increased cam overlap upsetting inlet pulses which causes fuelling glitches.

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Yes Steve, thor engine, 51 plate. The cams not too excessive. Just a bit more low end torque. Nothing boy racer.

sas1810 said:

Yes Steve, thor engine, 51 plate. The cams not too excessive. Just a bit more low end torque. Nothing boy racer.

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Quite jealous - I'd love to have the time to build a similar motor! Good luck.

Not got the time right now. Start my new job Monday. This is going to be an ongoing project. Bit at a time and as new as possible. I know the engine will be worth more than the car, but I know it will have a good engine for years to come