400 bhp/ton!

400 bhp/ton!

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Classic Chim

8,973 posts

90 months

Tuesday 14th May
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DangerousDerek said:
All of us I hope
wink

phazed

17,546 posts

145 months

Tuesday 14th May
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Real shame about Shakey...........

DangerousDerek

8,378 posts

161 months

Tuesday 14th May
quotequote all
phazed said:
Real shame about Shakey...........
and York
and others

we may complain about aspects of our tracks, the cost to attend, the queues to get on track etc but we need to support as best we can!

Certainly the smaller venues and the new ones.

I am racing the TVR over the half mile again at a new venue at Llanber, Snowdonia Aerodrome on 13/14th July. There were only 3 cars at Elvington at the weekend! It may be a bit expensive compared to the pod but to have all that track time in a truly beautiful setting I think is worth every penny.

Anyone fancy joining me? Half mile is perfect for being gentle on the start and stretching the legs of a TVR close to its limit

Classic Chim

8,973 posts

90 months

Tuesday 14th May
quotequote all
I’d love too, one day maybe,
Sitting hear imagining a nice drive to Wales or the like then having a thrash and back home in the same car. Nice easy start, 150 mph although I don’t think I’d get past 135 in that distance. Infact probably nowhere near that..... just a chance to let the car have its head then potter back home, two extremes the car is capable of. Try it with the roof off, my windscreen surround rubber flew off and into my helmet, st the fking crap out of me biggrin
Runway on a track day, awesome thumbup

Sardonicus

15,982 posts

162 months

Tuesday 14th May
quotequote all
DangerousDerek said:
As people have said to reduce 1/4 mile elapsed times it mainly comes down to the launch. It is proven that every tenth gained to 60 foot is worth at least twice that at the line. So if a TVR running 2.0 second to 60 foot and a 1/4 mile in 13.0 at 110 on street tyres puts on a pair of drag radials and suddenly runs 1.6 second to 60 foot will run the 1/4 in 12.2 but will only gain a little mph. The terminal speed is fairly consistent as this is ultimately determined by the bhp across the line.

When running super sticky drag radials such as Mickey Thompsons the trick is to commit. A decent burnout to get them hot then literally dump the clutch and hit them with full throttle from the off. If your suspension is set right then weight transfers to the rear and into the tyre, the foor print of the tyre increases and the sidewall wrinkles as they grip and the car lifts and moves forward.

Barrie and I have run low 1.5's to 60 foot and can still improve into the 1.4's with more practice I think.
Using that calculation Derek could put me at a 12.4/12.6 ET I'd take that thumbup only one way to find out I guess
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QBee

16,590 posts

85 months

Wednesday 15th May
quotequote all
Sardonicus said:
sing that calculation Derek could put me at a 12.4/12.6 ET I'd take that thumbup only one way to find out I guess
....do you want me to post you my spare extra-strong drive shaft, Simon? whistle

Classic Chim

8,973 posts

90 months

Wednesday 15th May
quotequote all
QBee said:
....do you want me to post you my spare extra-strong drive shaft, Simon? whistle
And why would he need those Anthony wink
The only drive shafts I seem to remember getting broken are off cars that are highly tuned examples, very few standard cars have broken them that I know of.
My Dif was already very loose before I went so hardly drag racing’s fault that mine went 6 months after! It was already making noise but I hadn’t identified it as it was such a high pitched sound at first and I’m a bit mutton and Geoff hehe

How many sets of brake pads will people need on a track day, how much fuel, totally serviced before you go or your asking for trouble blar blar, I’m really not trying to choose between the two as both are great activities in a Tvr but let’s not kid ourselves about the mechanical damage track driving inflicts. I know of engines doing about 20,000 miles tops that have been hammered around tracks and I’m amazed they lasted that long.

Come on mate support both as we need all the encouragement we can get for these activities smile

DangerousDerek

8,378 posts

161 months

Wednesday 15th May
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Anthony isn't a fan of the drag racing type activities and that's fine but we don't need the negative comments so often.

Standard driveshafts should be safe on any road tyre and good into the 1.7's to 60 foot. Ive found that its when you launch hard enough to run 1.6's the shafts can be at risk.

I always bring a spare standard shaft or 2 with me in case somebody does break one. We can swap one in an hour or so and the guy can drive home to consider buying a pair of uprated shafts such as the Dave Mac ones I have.

Sardonicus

15,982 posts

162 months

Wednesday 15th May
quotequote all
No reason why a tuned RV8 is not up to track day sessions providing coolant and oil temps are managed correctly scratchchin and the builds sound of course

QBee

16,590 posts

85 months

Wednesday 15th May
quotequote all
DangerousDerek said:
Anthony isn't a fan of the drag racing type activities and that's fine but we don't need the negative comments so often.

Standard driveshafts should be safe on any road tyre and good into the 1.7's to 60 foot. Ive found that its when you launch hard enough to run 1.6's the shafts can be at risk.

I always bring a spare standard shaft or 2 with me in case somebody does break one. We can swap one in an hour or so and the guy can drive home to consider buying a pair of uprated shafts such as the Dave Mac ones I have.
Apologies, clearly my tongue in cheek comment struck the wrong note. I should think before i post.

I did actually buy a spare, up-rated shaft, assembled complete with CV joints, a couple of years ago, in case I broke one on the drag strip.
I did so after I read about a couple of breakages on here. I've still got it, wrapped in the bubble wrap in which it came to me.
Not sure, but I think I bought it off Lewis.....

Sorry if my comment seemed negative - I do know Simon, know his automotive expertise, and know that he is unlikely to break one in his 400.

phazed

17,546 posts

145 months

Wednesday 15th May
quotequote all
This.

Why hasn’t my keyboard got arrows pointing up?

QBee

16,590 posts

85 months

Wednesday 15th May
quotequote all
phazed said:
This.

Why hasn’t my keyboard got arrows pointing up?
My arrows only go sideways too.......but I do live in Robin Hood County, which might explain it.

Boosted LS1

18,045 posts

201 months

Wednesday 15th May
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^ Top shelf, above the 6.

phazed

17,546 posts

145 months

Wednesday 15th May
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^^^^, Damn he’s right but it’s actually above the seven.

Thanks.

QBee

16,590 posts

85 months

Wednesday 15th May
quotequote all
Not on my iPad.....confused

Boosted LS1

18,045 posts

201 months

Wednesday 15th May
quotequote all
^^Defo 6 for me on a queeryty's queerboard.:-)

phazed

17,546 posts

145 months

Wednesday 15th May
quotequote all
Nope, above the 7 on an iPhone 7...........


Classic Chim

8,973 posts

90 months

Thursday 16th May
quotequote all
QBee said:
Apologies, clearly my tongue in cheek comment struck the wrong note. I should think before i post.

I did actually buy a spare, up-rated shaft, assembled complete with CV joints, a couple of years ago, in case I broke one on the drag strip.
I did so after I read about a couple of breakages on here. I've still got it, wrapped in the bubble wrap in which it came to me.
Not sure, but I think I bought it off Lewis.....

Sorry if my comment seemed negative - I do know Simon, know his automotive expertise, and know that he is unlikely to break one in his 400.
Sorry if I’m nagging on hehe
But the facts don’t really support the thought somehow going near a drag strip will tear driveshafts apart.
Over the years some of these cars must have been subjected to all sorts of racing from the traffic lights type abuse, hardly old things really wink It’s nearly always the earlier ones with two circlip cut outs that snap and nearly always in that area from what i’ve read.

Ive watched Peter launch a few times,,, he's well on it, car almost wheelies, no surprise a powerful car like that having a full on race start after a burnout is risking the shafts but if you want to set times it’s a risk you must take, although Barry does none of that, just rolls away then floors it. He’s not exactly slow either biggrin

I know Anthony has a passion for track driving, I understand this entirely, he often reminds us all to support the track activities as it’s truly great fun with other Tvr mates etc so for me drag racing is exactly the same thing which as a sport is struggling in this country so rather than defend either I support both and logically a few drag runs is not a big deal if your cars any good.

I remember Jacko breaking his and thinking, right thats him fked, one less to beat biggrin
40 mins later after some clanking of spanner’s he’s back out there with one of Derek’s shafts. Damn fast too,,, thumbup




phazed

17,546 posts

145 months

Thursday 16th May
quotequote all
I've the later shafts that are pretty unbreakable.

As Alun states, I have induced a bit of terror to the car, (drag radials, burn out, full throttle and side stepped the clutch).

Worked well until the stub axle broke!

Never again will I be that harsh as I will stick to road tyres if the opportunity arises.

BJWoods

4,873 posts

225 months

Thursday 16th May
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AceOfHearts said:
After being very happy with my dyno run on Saturday (417bhp / 450 ft/lb) I took the car to the weighbridge today as I have always wondered how much the car weighs.

It had almost exactly half a tank of fuel, but no spare wheel and no tools in the boot. Only things to really note is I have much lighter Cobra seats and I don't have PAS of A/C.

Weight came back at 1040kg so very close to the quoted TVR figure, and officially puts the car at 400bhp/ton! biggrin
That is really light! I thought my T350c was light at 1161 kg (inc half a tank of fuel, and all tools, junk, etc out aswell) and that makes 400/bhp / tonne (465bhp)