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jimbo1812
Original Poster
49 posts
93 months
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does any one know which would be the best option, bye a second hand engine or bye a new one.
had an issue in that it seems the crank decided to snap and dump part of the block on the road side.
just waiting to find out if I was to bye a new block if I can still use the old cylinder heads etc, not holding out much hope on that one. Looking to try a keep it as a 4ltr in order that I don't have to change much else in the process.
any ideas most greatful.
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MPoxon
2,907 posts
42 months
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Hi James,
Sorry to hear about your engine. It might be worth getting in touch with an engine builder to see what they suggest as the best option to get you back on the road again.
Iit it were my car I would begin by speaking with the following people:
Rob Roberstson - V8 Developments
Dom Tricket - TVR Power
John Eales - JED
Matthew
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Alexdaredevilz
4,257 posts
48 months
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The engine in my profile is for sale
Can be seen running and test driven
And what ever checks you want to do
Runs 12.48 quarter mile on road tyres, will out run most 5.0's will just drop right in your Chim
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Warwick67
248 posts
83 months
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Opportunity for an LS conversion...? 
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Chris71
19,987 posts
111 months
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Sorry to hear about your troubles.
I know just how you feel as the crank went on my 500 last year and the repair work is still ongoing (albeit at a leisurely pace)!
FWIW, I found most second hand engines to be quite expensive and not everyone keeps a scrupulous log of servicing and mileage, so I opted to get a new short engine. The logic was I'd have a known quantity that I could bolt the undamaged heads back onto for not much more than people were asking for decent second hand units. The problem was it just seemed so tempting to upgrade, so it eventually became a V8D 5-litre performance engine with uprated internals, a Stealth cam and an uprated clutch thrown in for good measure.
It should be a bit of beast when it's finished, but on reflection I probably could have found a decent second hand lump with a few mods for half the price. The thing is, you have to be confident in the seller and the history of the engine. Plus they come onto the market in dribs and drabs, so I guess it depends on the current supply.
I looked at the LS options. It's a great way to get serious power, but unfortunately it's not as simple as buying a few new engine mounts and dropping it in. I wanted a relatively hands-off conversion and people were talking about the best part of £15,000. You'd end up with an epic car, I'm sure, but you'd never get your money back.
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jimbo1812
Original Poster
49 posts
93 months
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Thanks for the info guys,
i have just found a company in wiltshire who can do a replacement engine 4.0 or 4.6 for £2750 (exchanged) or £3350 for a (non-exchange unit), so it may have to be the 4.6, and then look at upgrading the brake etc once it's run in. Will see what the garage have found as a replacement and go from there.
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Warwick67
248 posts
83 months
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jimbo1812
Original Poster
49 posts
93 months
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that would be nice but ones pockets aren't that deep :-)
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miniman
16,011 posts
131 months
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jimbo1812 said: Thanks for the info guys,
i have just found a company in wiltshire who can do a replacement engine 4.0 or 4.6 for £2750 (exchanged) or £3350 for a (non-exchange unit), so it may have to be the 4.6, and then look at upgrading the brake etc once it's run in. Will see what the garage have found as a replacement and go from there. Are you sure they are offering you TVR engines or just a RV8? There wasn't a 4.6 TVR unit to my knowledge.
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jimbo1812
Original Poster
49 posts
93 months
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The engine is a Rover V8, which was used by tvr who tweeked it a bit, from what i can remember, i may be wrong, you are correct that tvr didn't make a 4.6, there are a couple of chimaera 4.6 out there.
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Chris71
19,987 posts
111 months
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It seems to be quite a popular size for aftermarket performance versions of the Rover V8. Perhaps it's as far as you can go simply by over boring a standard block?
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MPoxon
2,907 posts
42 months
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Contrary to popular belief the 450 Chimps are all fitted with 4.6 litre engines. The 4.6 litre cross bolted is arguably one of the best Rover V8 engines.
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miniman
16,011 posts
131 months
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jimbo1812 said: The engine is a Rover V8, which was used by tvr who tweeked it a bit, from what i can remember, i may be wrong, you are correct that tvr didn't make a 4.6, there are a couple of chimaera 4.6 out there. Don't the TVR units have different cams, for instance?
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Alexdaredevilz
4,257 posts
48 months
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I will sell mine cheaper than that, with well over 300 bhp,
Top end/cam kit has done less than 1000miles, bores still have honing marks,
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Simon says
9,302 posts
90 months
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MPoxon said: Contrary to popular belief the 450 Chimps are all fitted with 4.6 litre engines. The 4.6 litre cross bolted is arguably one of the best Rover V8 engines.  unlike some I would have the TVR/RR 4.6 over the TVR 5.0 any day (unless its was a V8D short stroke 5.0) I think the 4.6 is a happier displacement RV8 rather than the stroked out 5.0  In saying this I would gladly have the heads off a 5.0  I also think the whole crankshaft pulleys falling off/pulley bolt breaking/falling out on the TVR 5.0 is an issue with crankshaft harmonic vibrations personally 
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dbv8
5,695 posts
89 months
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I would find out how much Alex wants for his and arrange a test run.
I think you would be pleasantly suprised.
Its a simple straight swap. No need to worry about brakes etc. If you feeel the need you can upgrade later.
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jimbo1812
Original Poster
49 posts
93 months
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hi Alex
if you let me know how much you want for it, let me know your pm and I'll contact you
James
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Chris71
19,987 posts
111 months
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Simon says said: MPoxon said: Contrary to popular belief the 450 Chimps are all fitted with 4.6 litre engines. The 4.6 litre cross bolted is arguably one of the best Rover V8 engines. unlike some I would have the TVR/RR 4.6 over the TVR 5.0 any day (unless its was a V8D short stroke 5.0) I think the 4.6 is a happier displacement RV8 rather than the stroked out 5.0 In saying this I would gladly have the heads off a 5.0 I also think the whole crankshaft pulleys falling off/pulley bolt breaking/falling out is an issue with crankshaft harmonic vibrations personally +1 On occasions the standard 500 engine reminded me a little of the tractor I learnt to drive on. Sadly, the crudely 'stretched' design is fairly typical of TVR's rather lazy approach to engineering. It's a bit like the tendency to carry over the donor manufacturer's engine calibrations, leading to that annoying shuffle on the V8s and the disproportionate engine braking on the S-Series' 2.9 V6s - they went for a quick, cheap solution, rather than tailoring it to that particular application. I'm told pretty much every part of the reciprocating assembly is weakened as a result of the way they lengthened the stroke, plus that lovely energetic feeling you get with something like a 430 is lost.
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OleVix
394 posts
17 months
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Alexdaredevilz said: The engine in my profile is for sale
Can be seen running and test driven
And what ever checks you want to do
Runs 12.48 quarter mile on road tyres, will out run most 5.0's will just drop right in your Chim What are you asking for it Alex? Pm?
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Simon says
9,302 posts
90 months
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Chris71 said: Simon says said: MPoxon said: Contrary to popular belief the 450 Chimps are all fitted with 4.6 litre engines. The 4.6 litre cross bolted is arguably one of the best Rover V8 engines. unlike some I would have the TVR/RR 4.6 over the TVR 5.0 any day (unless its was a V8D short stroke 5.0) I think the 4.6 is a happier displacement RV8 rather than the stroked out 5.0 In saying this I would gladly have the heads off a 5.0 I also think the whole crankshaft pulleys falling off/pulley bolt breaking/falling out is an issue with crankshaft harmonic vibrations personally +1 On occasions the standard 500 engine reminded me a little of the tractor I learnt to drive on. Sadly, the crudely 'stretched' design is fairly typical of TVR's rather lazy approach to engineering. It's a bit like the tendency to carry over the donor manufacturer's engine calibrations, leading to that annoying shuffle on the V8s and the disproportionate engine braking on the S-Series' 2.9 V6s - they went for a quick, cheap solution, rather than tailoring it to that particular application. I'm told pretty much every part of the reciprocating assembly is weakened as a result of the way they lengthened the stroke, plus that lovely energetic feeling you get with something like a 430 is lost. Ah if we are clutching at straws then I agree the 4.3 is a stonker  especially in BV form, of the 2 500's I have driven I found the engines vibey and one of them a Griff with just 16k the other a Chim with 60k+ although the Griff was more sprightly (better maintained) they both had the same harsh feel in fact the smoothest sweetest RV8 TVR that I have ever driven was a member on PH's and he owns a 4.0 pre-serp 250 plenum badged Chim what a sweetie sooooo smooth 
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