4.3 TVR Power speed 6

[cmr2payne]

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

[NTEL]

Good numbers from the 4.3 But the 4.0L "S" figures are crap!!!! Even my remapped standard 4.0L makes 322bhp and 297 ftlbs (at the wheels) on Doms Dyno.

I understand from Dom that the new 4.3 also comes with a 3 year / unlimited milage warranty.

[HarryW]

Staggered by the torque curves of all those S6's.
I bet the NoS one is bit lively

[ceejay]

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

[Barry Ashcroft]

NTEL said:

I understand from Dom that the new 4.3 also comes with a 3 year / unlimited milage warranty.

I bet fitting the NOS invalidates it

[batman0404]

Why use nitrous?
Do you really want to blow it up before it blows up on its own accord??

[yzf1070]

batman0404 said:

Why use nitrous?
Do you really want to blow it up before it blows up on its own accord??

TROLL

Top marks to Dom and the chaps at Power

[TVR_owner]

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

Edited by TVR_owner on Saturday 27th September 06:12

[shaunsmith]

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

Edited by TVR_owner on Saturday 27th September 06:12

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.

I often wondered that myself over the years.

[S5TVR]

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.

[Whitey]

thats the problem, different dyno's etc. My mighty 06 factory rebuild S/Sag spec engine with RR steel crank made 305bhp at the wheels at the SRR. I've never run it on another dyno, but plenty use the SRR and Joolz has the same dyno, so good for comparisons.

[ceejay]

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

Edited by TVR_owner on Saturday 27th September 06:12

I don't think the graph scales help much.

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.

[TVR_owner]

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

Edited by TVR_owner on Saturday 27th September 06:12

I don't think the graph scales help much.

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.

I acnt honestly remember anymore Cliff. My Sagaris hasn't turned a wheel since May (the 3000M is much more fun)

[ceejay]

You can't beat a classic....especially if it's a racer. Hope to see you at Oulton.

[TVR_owner]

ceejay said:

You can't beat a classic....especially if it's a racer. Hope to see you at Oulton.

You will, car now with CR T5 (rather than the old 4 speed) and about 35 Kilos lighter...drivers still heavy though!

[ceejay]

Have you gone for a dogbox or one of CT's kits? 35kg is a lot of weight, you will have to put the wheels back on before Oulton!!!! Look forward to seeing you there.

[Tvr Power]

yzf1070 said:

batman0404 said:

Why use nitrous?
Do you really want to blow it up before it blows up on its own accord??

TROLL

Top marks to Dom and the chaps at Power

Nitrous was my personal option this was just to show that Speed Six engines can take extreme power increases, has for the nitrous kits if fitted by Tvr Power 3 year unlimited mileage warranty will still be valid

Dom

[Tvr Power]

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.

Feel free to take our 4.3ltr on any other rolling road

Dom

[NTEL]

Tvr Power said:

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!!!

Nice one Dom

Edited by NTEL on Saturday 27th September 17:20

[tail slide]

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!!!

Nice one Dom

Agreed.

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