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Let's talk about cars

Let's talk about cars

Old Aug 26th 2020, 11:25 am
  #7501  
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Default Re: Let's talk about cars

Originally Posted by mrken30
.... Are TVRs classified the same as a "kit" car, from memory were they not quite often based on Fords?
I have never heard of them being classified as a kit car as they are delivered fully completed and there wasn't even a "build your own option".

I know there are "hoops to jump through" to import a a car into the US, but it is quite doable once they are 25 years old. Newer than that is extremely difficult, but not necessarily impossible - basically it would have to be unique in the US.

Some TVRS built as late as the late 80's, maybe even 1990-91 that had Ford V6 engines, but from the 1980's to mid 1990's a lot had Rover V8's, basically the Range Rover engine, and they were boring and stroking them out to as much as 5 litres. But from the mid 90's onwards, I guess as computer controlled milling equipment became available, they started making their own straight 6 and V8 engines.

Beyond the engines I suspect that some things, such as suspension and steering were constructed from another manufacturers parts, but there was AFAIK always a TVR chassis/ frame underneath.
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Old Aug 26th 2020, 2:31 pm
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Default Re: Let's talk about cars

I thought in ye olde days TVR were a bit like Lotus with the 7.

I always fancied a TVR, as a high days and holiday car go for it.
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Old Aug 26th 2020, 4:07 pm
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Default Re: Let's talk about cars

Originally Posted by Pulaski
Does any one have experience with TVR's?

I am mulling over the idea of importing one (that is over 25 years old), and there are a couple of interesting options. I know it would be a bit of a money pit, and yes, I know they're notoriously unreliable, but the prices aren't bad. It wouldn't be happening any time soon, probably 2-3 years at best, so I have enough time to do my homework.
A friend had a Chimaera, around a 1994-5 model I think, with the bored/stroked Rover V8. The fragility of the engine was a bit of an issue, with very short (and really, really don't-miss-this-or-it-may-blow-up) service intervals, not so much because of the overbored block as the head's high-lift cams and aggressive valve timing. Any gunge anywhere would likely have proved quickly terminal. For all its foibles, though (including a pretty approximate panel fit and some questionable trim work) it was enormous fun to be a passenger in.
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Old Aug 26th 2020, 4:35 pm
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Default Re: Let's talk about cars

Originally Posted by Steerpike
I suspect I'm greatly over-simplifying the design of the wheel motors in my mind. That article talks about 'going in reverse' which may indicate a real reversal (obviously, the wheel itself is always going in the same rotational direction - unless you are going in reverse ). So what I'm fairly positive about is, you take your foot off the accelerator, and the wheels immediately become generators; but maybe as you apply the brake, something is done to increase further the generation capacity of the wheel motors.

What do you see on your CRV charge indicator when you roll downhill (without braking)? The Prius has a very sexy diagram about what's going on with the battery (highly distracting, actually!) I'm almost +ve that it shows charge to the battery when 'rolling' (coasting / no brake). Of course google is not being cooperative in showing me such an image right now! I live on a hill so next time I go out I'll pay specific attention to the 'downhill roll' part!

I think my real question is - what happens differently when you coast down a hill versus apply the brake gently down a hill ...
I have both one of those diagrams that shows whether power (from the gas engine) or current is flowing and in what direction, plus a dynamic bar chart that shows the amount of power being consumed or electricity regenerated. If I take my foot off the throttle, even on a level surface, I see some regeneration. If I do the same thing going downhill I see more regeneration; if I apply brakes or paddle shifters I see a lot more regeneration in both cases. I presume that the paddle shifters invoke the same regeneration process as the brake pedal does, but without applying the friction brakes at all.
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Old Aug 26th 2020, 5:02 pm
  #7505  
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Default Re: Let's talk about cars

Originally Posted by Boiler
...... I always fancied a TVR, as a high days and holiday car go for it.
Well yeah, it would be a toy to take out in nice weather - I wouldn't get rid of my Mustang, and we also have Mrs P's Accord and my truck, so we certainly wouldn't be depending on it for regular transport.
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Old Aug 26th 2020, 5:59 pm
  #7506  
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Default Re: Let's talk about cars

Originally Posted by Pulaski
Some TVRS built as late as the late 80's, maybe even 1990-91 that had Ford V6 engines, but from the 1980's to mid 1990's a lot had Rover V8's, basically the Range Rover engine, and they were boring and stroking them out to as much as 5 litres. But from the mid 90's onwards, I guess as computer controlled milling equipment became available, they started making their own straight 6 and V8 engines.
Personally I wouldn't go for anything bigger than the 4.2 litre V8, that is quite bored out enough for something that s tarted as a 3.5 litre engine.
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Old Aug 26th 2020, 6:17 pm
  #7507  
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Default Re: Let's talk about cars

Originally Posted by lizzyq
Personally I wouldn't go for anything bigger than the 4.2 litre V8, that is quite bored out enough for something that s tarted as a 3.5 litre engine.
There's an argument that it originally started out with a planned 2.9l displacement when GM/ Buick designed it, but I take your point and I am sure that 4.2l would be plenty. My 2002 4.6l Mustang has 260hp, and honestly that is more than enough, even though a new GT has over 400hp, and given that it is a very rare occasion that I have ever pushed the gas pedal all the way to the floor, I am not sure what use having a 400hp engine would actually be.

That said, as TVRs weren't made in large volumes, it will probably be a matter of picking the best available vehicle if/when I decide to go ahead with a purchase, and would probably take a say, 30,000 mile 5.0l over a 60,000 mile 4.2l example.
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Old Aug 26th 2020, 6:27 pm
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Default Re: Let's talk about cars

Originally Posted by lizzyq
Personally I wouldn't go for anything bigger than the 4.2 litre V8, that is quite bored out enough for something that s tarted as a 3.5 litre engine.
Bearing in mind that most of my info about Rover V8s comes from Morgan circles, since the +8 used the same engine for many years (mine is a 4-cylinder with the 1.6-litre Ford CVH that was used in pre-fuel-injection Escort XR3s, quite a different beast!), I've just pulled this little snippet off a Morgan forum.

The standard overbore for a Rover V8 was from 89 to 94mm, which with the same stroke went up from 3.5 to 3.9 litres, with a rather oversquare geometry (71mm stroke). Greater increases in capacity were typically achieved through increasing stroke length, up to 82mm for a 4.6 litre engine. That led to its own difficulties in the bottom end, and with such a large crank throw also meant that the 'wrist' end of the rod is exerting pretty significant lateral forces on the cylinder wall. Capacities beyond 4.6l were unusual except in bespoke machined situations, as they were prone to knacker the cylinder liners as well as having all sorts of overheating problems.
I don't know how much the overheating issues are uniquely a Morgan phenomenon (even the little ones like mine run stupid hot because of agricultural aerodynamics leading to very poor airflow in the engine compartment), but the received wisdom seems to be that anythign over around 4.2l is asking for an expensive maintenance schedule.
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Old Aug 26th 2020, 6:36 pm
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Default Re: Let's talk about cars

Originally Posted by Pulaski
There's an argument that it originally started out with a planned 2.9l displacement when GM/ Buick designed it, but I take your point and I am sure that 4.2l would be plenty. My 2002 4.6l Mustang has 260hp, and honestly that is more than enough, even though a new GT has over 400hp, and given that it is a very rare occasion that I have ever pushed the gas pedal all the way to the floor, I am not sure what use having a 400hp engine would actually be.

That said, as TVRs weren't made in large volumes, it will probably be a matter of picking the best available vehicle if/when I decide to go ahead with a purchase, and would probably take a say, 30,000 mile 5.0l over a 60,000 mile 4.2l example.
Presumably the steering wheel will be on the right? Or are you hoping to find a left-hand-drive model?
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Old Aug 26th 2020, 6:40 pm
  #7510  
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Default Re: Let's talk about cars

Originally Posted by Steerpike
Presumably the steering wheel will be on the right? Or are you hoping to find a left-hand-drive model?
Most likely it would be RHD. LHD ones exist, but I don't think are common. Obviously LHD would be more convenient, but 'd be happy enough with RHD.

Last edited by Pulaski; Aug 26th 2020 at 7:52 pm.
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Old Aug 26th 2020, 7:47 pm
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Default Re: Let's talk about cars

Originally Posted by Pulaski
My 2002 4.6l Mustang has 260hp, and honestly that is more than enough, even though a new GT has over 400hp, and given that it is a very rare occasion that I have ever pushed the gas pedal all the way to the floor, I am not sure what use having a 400hp engine would actually be.
I have 455hp in my Camaro, and yeah, the only place I really fully open the throttle is at the track, on the public road there really aren't safe, sensible opportunities to do so. Mind you, it also has buckets of torque which is a handy luxury on the road, doesn't really matter what gear I'm in it just pulls.
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Old Aug 27th 2020, 12:40 am
  #7512  
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Default Re: Let's talk about cars

Here is a project I started last year. It is a 1983 mail Jeep purchased in Alabama from a guy who has many and sells parts to people still using them. I got a rusted out east coast DJ5 Jeep plus a nearly new frame. After sitting in a field for 20 years some gas in carb and battery hook-up it started right up. I have removed everything from old frame restored and reinstalled on new frame. Made a aluminum plate to convert from two barrel to one barrel carb. A fiberglass body is on order and will build as a no doors, bikini top on stripped down to just the basics. Has a 151 Pontiac iron duke engine and Chrysler 904 automatic transmission as from factory.

Chassis redone ready for fiberglass body
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Old Aug 27th 2020, 3:48 am
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Default Re: Let's talk about cars

Originally Posted by ddsrph
Here is a project I started last year. It is a 1983 mail Jeep purchased in Alabama from a guy who has many and sells parts to people still using them. I got a rusted out east coast DJ5 Jeep plus a nearly new frame. After sitting in a field for 20 years some gas in carb and battery hook-up it started right up. I have removed everything from old frame restored and reinstalled on new frame. Made a aluminum plate to convert from two barrel to one barrel carb. A fiberglass body is on order and will build as a no doors, bikini top on stripped down to just the basics. Has a 151 Pontiac iron duke engine and Chrysler 904 automatic transmission as from factory.

Chassis redone ready for fiberglass body
Now that looks nice, have been tempted by Jeeps but they have a reputation.

Keep the photos coming.
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Old Aug 27th 2020, 12:24 pm
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Default Re: Let's talk about cars

Originally Posted by Boiler
Now that looks nice, have been tempted by Jeeps but they have a reputation.

Keep the photos coming.
The DJ5 is a Jeep in appearance and even has a stronger frame than the CJ5 but it’s mission was to deliver mail and was just a two wheel drive with automatic transmission. I started mainly for a “project” with the intention for making as stripped down as possible to use for summer around town driving. The vehicle is made up from various Chrysler and American motors parts and it is a challenge finding which car had identical parts to purchase. I will be driving to Nebraska to pick up the fiberglass body from a company called Shell Valley which makes Jeep bodies and kit cars for the Ford Cobra.

Bought heavy duty bumpers and adapted to fit.

One barrel carb from F150 300 cu inch straight 6







Last edited by ddsrph; Aug 27th 2020 at 12:27 pm.
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Old Aug 27th 2020, 12:26 pm
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Default Re: Let's talk about cars

Something went wrong with my picture posting. Some unintended photos made it to post.
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