Anyone changed to a 4.6?
Discussion
I have tried searching but couldnt find anything on fitting the rover 4.6 engine.
Has anyone gone this route or can give guidance on the sort of power you could acheive?
I see brand new ones on ebay that cost less than a used 500 and wondered what type of performance they would offer?
Has anyone gone this route or can give guidance on the sort of power you could acheive?
I see brand new ones on ebay that cost less than a used 500 and wondered what type of performance they would offer?
What like the 4.6 in the Chimaera 450 ????? v8 racing said:
depends how driveable you want the car and how deep your pockets are basically!
I'd suggest you talk to V8 Racing to get an idea of price/performance but for comparison my fairly tame stage III 4.6 was only giving away about 10 bhp peak power compared to a typical standard 500, but the 500 has about 30 lb-ft more torque in the mid range. It seemed to me that a stock 4.6 with decent heads on and the right cam represented extremely good value for money.Chimjunkie said:
The 4.5 is a 4.44 really. The 4.6 in std spec is around 222bhp. Not really in the same league as a good 275 from a 5.0 IMO.
Er no, the 450 is fitted with the 4.6 (4554cc, 94mm bore, 82mm stroke) cross-bolted Range Rover unit tweaked by TVR (cam, vernier, and variably - BV heads, pocketed pistons). The 4.44 engine was IIRC basically the engine used in the original tuscan race cars and had a slightly shorter stroke (80mm), I think using a suitably machined Iceberg crank. What Peter says is quite right IMHO.
Tahiti450 said:
Chimjunkie said:
The 4.5 is a 4.44 really. The 4.6 in std spec is around 222bhp. Not really in the same league as a good 275 from a 5.0 IMO.
Er no, the 450 is fitted with the 4.6 (4554cc, 94mm bore, 82mm stroke) cross-bolted Range Rover unit tweaked by TVR (cam, vernier, and variably - BV heads, pocketed pistons). The 4.44 engine was IIRC basically the engine used in the original tuscan race cars and had a slightly shorter stroke (80mm), I think using a suitably machined Iceberg crank. What Peter says is quite right IMHO.
Agree the 4.6 is a great route to go down. But the OP was comparing the price of a std 4.6 range rover with a 5.0 TVR spec engine?
Jon.
Chimjunkie said:
Tahiti450 said:
Chimjunkie said:
The 4.5 is a 4.44 really. The 4.6 in std spec is around 222bhp. Not really in the same league as a good 275 from a 5.0 IMO.
Er no, the 450 is fitted with the 4.6 (4554cc, 94mm bore, 82mm stroke) cross-bolted Range Rover unit tweaked by TVR (cam, vernier, and variably - BV heads, pocketed pistons). The 4.44 engine was IIRC basically the engine used in the original tuscan race cars and had a slightly shorter stroke (80mm), I think using a suitably machined Iceberg crank. What Peter says is quite right IMHO.
Agree the 4.6 is a great route to go down. But the OP was comparing the price of a std 4.6 range rover with a 5.0 TVR spec engine?
Jon.
Chimjunkie said:
Think we are both right on this one! The bible lists the 4.5 as being a 4.44 (94 bore 80 stroke) think the 4.44 was used for the 450BV and from 1996 the 450 was the 4.6?? Think there are many errors in various literature on the detail so who knows!!
Agree the 4.6 is a great route to go down. But the OP was comparing the price of a std 4.6 range rover with a 5.0 TVR spec engine?
Jon.
Hate to say it (sorry Steve) but I think the Bible has a few errors on that page (p33). If you notice the next column lists the 450 as 4280cc Agree the 4.6 is a great route to go down. But the OP was comparing the price of a std 4.6 range rover with a 5.0 TVR spec engine?
Jon.
but 80mm stroke (which would make it 4441) whereas it is 82mm and 4554cc. The 450s fitted with BV heads like mine have the same valves sizes as the other BVs. AKAIK all Chimaera 4.5s left the factory with the 4.6 engine. I stand to be corrected. Edited by Tahiti450 on Tuesday 29th January 22:53
I have some notes I made a while ago (sorry took me a while to come across them..) that may be accurate / hearsay.
The 4444cc engine (80mmx94mm) was used in the 450SEAC and Tuscan Challenge cars, and subsequently in the quite rare 450BV Chim & Griffs. Not to be confused with the 450's that happened to be delivered with BV heads stuck on the 4.6 engines (which TVR rationalized to 450 rather than the outlandish claims of LR at 4.6
)
Dave
The 4444cc engine (80mmx94mm) was used in the 450SEAC and Tuscan Challenge cars, and subsequently in the quite rare 450BV Chim & Griffs. Not to be confused with the 450's that happened to be delivered with BV heads stuck on the 4.6 engines (which TVR rationalized to 450 rather than the outlandish claims of LR at 4.6
)Dave
spend said:
I have some notes I made a while ago (sorry took me a while to come across them..) that may be accurate / hearsay.
The 4444cc engine (80mmx94mm) was used in the 450SEAC and Tuscan Challenge cars, and subsequently in the quite rare 450BV Chim & Griffs. Not to be confused with the 450's that happened to be delivered with BV heads stuck on the 4.6 engines (which TVR rationalized to 450 rather than the outlandish claims of LR at 4.6)
Dave
That sounds quite reasonable and more or less fits with what I understood. As you say the pre-450 4.5l chims and grifs were rare specials really. The 4444cc engine (80mmx94mm) was used in the 450SEAC and Tuscan Challenge cars, and subsequently in the quite rare 450BV Chim & Griffs. Not to be confused with the 450's that happened to be delivered with BV heads stuck on the 4.6 engines (which TVR rationalized to 450 rather than the outlandish claims of LR at 4.6
)Dave
Monstergrowler, what are you trying to achieve?
Looking at your profile, I presume yours is a 4.0
If you are just looking to replace a knackered engine and leave it at that, or just raise the performance of a 4.0 then the 5.0 is going to give you a bit more.
If you are going to use this as the basis of a big tuning job then there may advantages to starting the build with a 4.6
The cross bolted crank is an advantage and crankshaft journal size helps.
If you are uprating from a 4.0 remember that there were other differences such as better brakes that should be taken care of first.
Looking at your profile, I presume yours is a 4.0
If you are just looking to replace a knackered engine and leave it at that, or just raise the performance of a 4.0 then the 5.0 is going to give you a bit more.
If you are going to use this as the basis of a big tuning job then there may advantages to starting the build with a 4.6
The cross bolted crank is an advantage and crankshaft journal size helps.
If you are uprating from a 4.0 remember that there were other differences such as better brakes that should be taken care of first.
Uncle Fester said:
If you are uprating from a 4.0 remember that there were other differences such as better brakes that should be taken care of first.
If its the chim in his profile, its got the later body, so chassis and brakes same as the 500'salthough having said that I'd still upgrade the brakes and dampers first.
In answer to the op's original question, the 4.6 will drop straight in, externally no differences, other than maybe the larger plenum top fitted to some, but you can swap that for existing if necc.
Unless its a thor spec motor which has a different sump ( might fit) and the late twin plenum, which would also need a different ecu and a few other bits..
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