4.3 TVR Power speed 6
Discussion
Doms just finished mapping a customers 4.3 car.. here were the results
Standard Tuscan "S" 304 BHP with 267 ftlbs torque @ the rear
wheels (green line)
Tvr Power 4.3 ltr 370 Bhp with 341 ftlbs torque @the rear wheels
Tvr Power 4.3 ltr with nitrous 457 Bhp with 448 ftlbs torque @ the rear wheels
Standard Tuscan "S" 304 BHP with 267 ftlbs torque @ the rear
wheels (green line)
Tvr Power 4.3 ltr 370 Bhp with 341 ftlbs torque @the rear wheels
Tvr Power 4.3 ltr with nitrous 457 Bhp with 448 ftlbs torque @ the rear wheels
The 4.0S figures are a bit on the low side but fall within the typical S engine bracket. It's interesting to see that the S engine makes its power all the way up to 7K rpm as it should, while the 4.3 seems to peak just after 6K. Again just what you'd expect.
The torque figures look very promising. Perhaps I should give Dom a call before buying an AJP8
The torque figures look very promising. Perhaps I should give Dom a call before buying an AJP8
Is it just me or does anyone else find that dyno read-outs for the S6 never match the way the car feels like it makes its power. I would have expected a fairly noticable change in rate of power increase from 5K onwards with the standard S engine?
Fairly uniform from 3.5 - 6 then tailing off just appears wrong
Fairly uniform from 3.5 - 6 then tailing off just appears wrong
Edited by TVR_owner on Saturday 27th September 06:12
TVR_owner said:
Is it just me or does anyone else find that dyno read-outs for the S6 never match the way the car feels like it makes its power. I would have expected a fairly noticable change in rate of power increase from 5K onwards with the standard S engine?
Fairly uniform from 3.5 - 6 then tailing off just appears wrong
Yeah, I agree the power output the Speed Six puts out on paper certainly doesn't match the way it feels in reality especially the one I used to have in my Tuscan S. Good post. Fairly uniform from 3.5 - 6 then tailing off just appears wrong
Edited by TVR_owner on Saturday 27th September 06:12
I often wondered that myself over the years.
TVR_owner said:
Is it just me or does anyone else find that dyno read-outs for the S6 never match the way the car feels like it makes its power. I would have expected a fairly noticable change in rate of power increase from 5K onwards with the standard S engine?
Fairly uniform from 3.5 - 6 then tailing off just appears wrong
To be honest I have difficulty in believing the 4.3 figures. 370 bhp at the wheels when one of the quickest and most sorted Tuscan S's I know of makes 302 bhp at the wheels but on a different set of rollers. Another 68 bhp for a 0.3 litre increase in capacity - hard to believe. What's the answer then ? - we're back to different dyno's again. I have, first hand, seen a supercharged Chim 500 lose 50 bhp in 12 hours when being run on Power's dyno followed by SRR's dyno.Fairly uniform from 3.5 - 6 then tailing off just appears wrong
TVR_owner said:
Is it just me or does anyone else find that dyno read-outs for the S6 never match the way the car feels like it makes its power. I would have expected a fairly noticable change in rate of power increase from 5K onwards with the standard S engine?
Fairly uniform from 3.5 - 6 then tailing off just appears wrong
I don't think the graph scales help much.Fairly uniform from 3.5 - 6 then tailing off just appears wrong
Edited by TVR_owner on Saturday 27th September 06:12
I've just looked at my numerous speed 6 traces and to be fair the power delivery is pretty much uniform (near enough a straight line). Torque on the other hand rises more rapidly from 4.5K rpm to a peak at about 6k then tails off pretty darn quickly. I'd say 4.5k to 6K is probably where the engines I had felt strongest. I found the performance at 7K and above very disappointing but at least it made a nice noise.
ceejay said:
TVR_owner said:
Is it just me or does anyone else find that dyno read-outs for the S6 never match the way the car feels like it makes its power. I would have expected a fairly noticable change in rate of power increase from 5K onwards with the standard S engine?
Fairly uniform from 3.5 - 6 then tailing off just appears wrong
I don't think the graph scales help much.Fairly uniform from 3.5 - 6 then tailing off just appears wrong
Edited by TVR_owner on Saturday 27th September 06:12
I've just looked at my numerous speed 6 traces and to be fair the power delivery is pretty much uniform (near enough a straight line). Torque on the other hand rises more rapidly from 4.5K rpm to a peak at about 6k then tails off pretty darn quickly. I'd say 4.5k to 6K is probably where the engines I had felt strongest. I found the performance at 7K and above very disappointing but at least it made a nice noise.
yzf1070 said:
batman0404 said:
Why use nitrous?
Do you really want to blow it up before it blows up on its own accord??
TROLL Do you really want to blow it up before it blows up on its own accord??
Top marks to Dom and the chaps at Power
Dom
S5TVR said:
TVR_owner said:
Is it just me or does anyone else find that dyno read-outs for the S6 never match the way the car feels like it makes its power. I would have expected a fairly noticable change in rate of power increase from 5K onwards with the standard S engine?
Fairly uniform from 3.5 - 6 then tailing off just appears wrong
To be honest I have difficulty in believing the 4.3 figures. 370 bhp at the wheels when one of the quickest and most sorted Tuscan S's I know of makes 302 bhp at the wheels but on a different set of rollers. Another 68 bhp for a 0.3 litre increase in capacity - hard to believe. What's the answer then ? - we're back to different dyno's again. I have, first hand, seen a supercharged Chim 500 lose 50 bhp in 12 hours when being run on Power's dyno followed by SRR's dyno.Fairly uniform from 3.5 - 6 then tailing off just appears wrong
Dom
NTEL said:
Tvr Power said:
Feel free to take our 4.3ltr on any other rolling road
Dom
as for the nitrous kits if fitted by Tvr Power 3 year unlimited mileage warranty will still be valid
Dom
Well, thats from the horses mouth, and you can't get fairer than that!!!Dom
as for the nitrous kits if fitted by Tvr Power 3 year unlimited mileage warranty will still be valid
Dom
Nice one Dom
Respect to the man that stands firmly by his claims, and although Dom hardly needs me to say it, the 4.3 power & torque curves look convincing IMO (even if 4.0 is a bit low).
For driver's impression of acceleration, my experience has always been that above peak torque rpm in any engine, if there is a steady fall in torque that is mirrored by a climb in power, the feeling when driving is the line between the two, ie. same acceleration throughout mid to high rpm, which is very effective.
Edited by tail slide on Saturday 27th September 23:13
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