80mojo
Part of things
Posts: 753
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Jul 31, 2012 11:03:10 GMT
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'71 Opel GT '72 Manta A '79 Dodge Autosleeper '83 Monza & a half '86 Manta GT/E V6 '91 Astra SXi '94 Carlton Diamond Estate 24v
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jasonj
Part of things
Posts: 220
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Jul 31, 2012 11:43:10 GMT
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I would say the GT is a bit on the heavy side for a bike engine. Although they produce good power the torque figures are usually quite low. That's just my opinion. I may be wrong. Always had a soft spot for Opel GT's )
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Team Supercharged Opel Ascona 400. 294bhp - 235 lb/ft
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craig1010cc
Club Retro Rides Member
Posts: 2,998
Club RR Member Number: 35
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Jul 31, 2012 12:03:40 GMT
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there are bike engined polo's and saxo's out there that would be around the 850 kg mark I would have thought (as well as quite a few minis now). It will be more down to the choice of engine, a nice V twin would be good
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mym
Part of things
Posts: 443
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Jul 31, 2012 13:18:20 GMT
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morgan 3 wheeler?
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Clement
Europe
ambitious but rubbish
Posts: 2,095
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Jul 31, 2012 13:28:08 GMT
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850kg seems a bit heavy for such a small car with a bike engine in it, surely a bike engine would be lighter than the stock unit?
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Jul 31, 2012 14:28:26 GMT
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Most of the data I can find shows the GT as having a kerb weight of around 950kg rather than 850kg. I suppose it depend on whether the 1.1 or 1.9 version. www.carfolio.com/specifications/models/car/?car=71588&Opel-specificationsThe difference is immaterial as you need to subtract the weight of whatever engine you have in yours to get the base figure of the rolling shell that you'd be adding the bike lump. There was a discussion about bike engines in cars last year so it might be worth trawling the previous threads. Paul H
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80mojo
Part of things
Posts: 753
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Jul 31, 2012 15:34:32 GMT
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I'll have a rummage cheers. The GT weighs between 840 - 940 but I can definitely vouch that the standard CIH weighs a lot. Mine's got a 2.0 Manta GTE in but that's going to be heavier if anything than the standard 1.9 Carb lump. I figured it is probably a bit heavy for a bike engine, and yes, I've got more than enough on my plate already, but the thought of a GT with the noise of a bike engine and revving to 12k upwards is definitely grin material and hard to get out of my head...
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'71 Opel GT '72 Manta A '79 Dodge Autosleeper '83 Monza & a half '86 Manta GT/E V6 '91 Astra SXi '94 Carlton Diamond Estate 24v
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Jul 31, 2012 15:59:40 GMT
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You could always use two bike engines :-D
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Koos
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Midas
Part of things
Posts: 509
Club RR Member Number: 14
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Jul 31, 2012 16:56:45 GMT
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I seem to remember the recommended top weight for a Bike engined car was around 700kg. Not just the engine to consider, clutch and box too.
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Jul 31, 2012 17:56:07 GMT
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I'll just leave this here:
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Jul 31, 2012 17:58:01 GMT
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A friend of mine converted a classic Mini with a FWD R1 and an electric reverse. It is not stripped and the weight of the car hadn't change after the conversion was done. But a Mini isn't heavy to start with.
It still is bl**dy quick,though!
Aren't there fiberglass parts/body available for the GT?
It might work (get the weight down) if you get a rust bucket and turn it raw roadster (no windows and doors) with a tubed front end, fiberglass bonnet.
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Click picture for more
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Jul 31, 2012 18:50:08 GMT
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The weight and lack of torque has been covered above. Another aspect is they're damned hard to live with as a road car, and anybody who has one will tell you that. Great for short bursts, but it wants to go it all the time. At 70mph the engine is likely to be spinning at around 6000rpm, so your Opel may no longer be great at being a GT Not raining on your parade, it's certainly do-able, but it'll change the entire character of the car.
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Jul 31, 2012 19:06:15 GMT
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....and to answer the original question :
Yes, I built a Locost with a Fireblade engine. It goes in like any other engine, but requires a special flange instead of the drive sprocket. Also new propshaft to be made up, new exhaust made up, but that's like any transplant.
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Jul 31, 2012 19:21:32 GMT
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I'll have a rummage cheers. The GT weighs between 840 - 940 but I can definitely vouch that the standard CIH weighs a lot. Mine's got a 2.0 Manta GTE in but that's going to be heavier if anything than the standard 1.9 Carb lump. I figured it is probably a bit heavy for a bike engine, and yes, I've got more than enough on my plate already, but the thought of a GT with the noise of a bike engine and revving to 12k upwards is definitely grin material and hard to get out of my head... You need 10k revs and noise...? Get a rotary in it! A nice street port 13b will sound awesome, rev like a nutter and pee off a few purists! How much win do you need? ;D
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Koos
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MrSpeedy
East Midlands
www.vintagediesels.co.uk
Posts: 4,789
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Jul 31, 2012 19:23:03 GMT
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I have this huge desire to transplant a Triumph Rocket 3 engine into a Spitfire, alas donor engines are somewhat hard to come by
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Jul 31, 2012 20:00:50 GMT
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I have this huge desire to transplant a Triumph Rocket 3 engine into a Spitfire, alas donor engines are somewhat hard to come by Someone I know has a Rocket 3. Huge thing. He works for D&K motorbike breakers and got it especially sent over from USA. Cost-a-fortune type machine. He's had custom wheels made plus leading link forks as it's going to be a sidecar hauler paul h
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