Rolling Road data from anyone?

[Targarama]

Anyone RRed their T350/Tamora? Be interesting to see what power/torque the 3.6 engines really make. I know some Tuscaneers have done this, but I'm not sure it was with recent 3.6 engines.

I know Maddog did his recently down at a PH RR meet at Vixpy's place ...

[nubbin]

Here ya go mate! :-

[chris watton]

That's not too far off from the quoted factory figures Nubbin , Like your graph shows, I have found that thraping it past 7000 rpm is a waste of time, as peak power seems to come at around 6-6500, then tails off,, having said that, I have never once bounced off the limiter!

[joospeed]

But all the graphs shows is that the 4valvers produce less power in the middle where it's needed .. the value of 4 valves is squandered somehow by TVR .. their 4valvers are less impressive power producers than their 2valvers for anything other than emissions v power (an important consideration these days of course).

I think although Sp6 power outputs are more consistent than the ajp8, they're actually less impressive in terms of the output versus their potential. If you see what i mean ..

[chris watton]

[redacted]

[joospeed]

The Sp6 cars are alos lowered geared (lower final drive in teh diff) which suggests to me that tvr were conscious of the lack of power at teh wheels so geared it down and used the rev potential of the engine, but as we see it's actually no better at holding power at high revs than the V8 cars. The sp6 cars though do have lightning throttle response, and feel massively better than the (comparatively) asthmatic RV8 cars.

[chris watton]

I thought the gear ratios were the same throughout the TVR range, apart from the first three ratios in the close ratio varient (which I have just had fitted, but not fully tried out yet!)
I would assume that the S6 would need fairly constant 'fettling' to keep it in top condition to acheive it's quoted 7200 rpm cut off point.

[jayjay]

I am having my car tested on Saturday. Will post the results.

[Targarama]

Be interesting to see what Austec can do to fill in that torque curve ...

Thanks for posting this Nubbin - it clearly shows the lack of torque. As Jools says, this is a 3.6 litre highly tuned engine and it's got a definite lack of mid range torque. Still, a nice smooth power curve.

[Mr Freefall]

Targarama said:

Be interesting to see what Austec can do to fill in that torque curve ... Thanks for posting this Nubbin - it clearly shows the lack of torque. As Jools says, this is a 3.6 litre highly tuned engine and it's got a definite lack of mid range torque. Still, a nice smooth power curve.

I will post the Austec reults tomorrow. 375.2 BHP and 355.3 lbs of torque. You will see my curve has a flat spot on the to due to HT lead fault under load. I have Magencors on the way, and will get a session booked once these are on, but it might even have 380bhp at the top when the curve is more smooth...

Mr F

[jayjay]

Mr Freefall said:

Targarama said: Be interesting to see what Austec can do to fill in that torque curve ... Thanks for posting this Nubbin - it clearly shows the lack of torque. As Jools says, this is a 3.6 litre highly tuned engine and it's got a definite lack of mid range torque. Still, a nice smooth power curve. I will post the Austec reults tomorrow. 375.2 BHP and 355.3 lbs of torque. You will see my curve has a flat spot on the to due to HT lead fault under load. I have Magencors on the way, and will get a session booked once these are on, but it might even have 380bhp at the top when the curve is more smooth... Mr F

Nice.

What are they charging?

[maddog-uk]

Mine was disappointing I seam to recall, 280 at the wheel 340estimated at the fly. Having met Paul from Austec I promised I would take it down there. I am also going to ring the factory, you never know may be I have a phantom RR!

[washy]

Mr Freefall - are your results for a 3.6 RR? That torque sounds pretty impressive. My biggest fear about the speed six in my Sagaris is lack of grunt compared to my Cerb.

[macdeb]

joospeed said:

The Sp6 cars are alos lowered geared (lower final drive in teh diff) which suggests to me that tvr were conscious of the lack of power at teh wheels so geared it down and used the rev potential of the engine, but as we see it's actually no better at holding power at high revs than the V8 cars. The sp6 cars though do have lightning throttle response, and feel massively better than the (comparatively) asthmatic RV8 cars.

Performance figures [acceleration AND top end] are still impressive though Jools wouldn't you say? Regardless of gearing.

[daftlad]

Targarama said:

Be interesting to see what Austec can do to fill in that torque curve ... Thanks for posting this Nubbin - it clearly shows the lack of torque. As Jools says, this is a 3.6 litre highly tuned engine and it's got a definite lack of mid range torque. Still, a nice smooth power curve.

I assume that this is a read-out with the cats taken out. Would have been interesting to see a back to back comparison of the same car with the cats in place. I suspect that would fill the torque gap quite nicely.

>> Edited by daftlad on Wednesday 16th February 07:09

[joospeed]

daftlad said:

Targarama said: Be interesting to see what Austec can do to fill in that torque curve ... Thanks for posting this Nubbin - it clearly shows the lack of torque. As Jools says, this is a 3.6 litre highly tuned engine and it's got a definite lack of mid range torque. Still, a nice smooth power curve. I assume that this is a read-out with the cats taken out. Would have been interesting to see a back to back comparison of the same car with the cats in place. I suspect that would fill the torque gap quite nicely. >> Edited by daftlad on Wednesday 16th February 07:09

ooo good point, with the missing positive reflection from the cat face that might contribute to lack of the midrange, removing the cats on the ajp8 has ilttle effect, largely because the manifold design is appaulling I think.

[joospeed]

macdeb said:

joospeed said: The Sp6 cars are alos lowered geared (lower final drive in teh diff) which suggests to me that tvr were conscious of the lack of power at teh wheels so geared it down and used the rev potential of the engine, but as we see it's actually no better at holding power at high revs than the V8 cars. The sp6 cars though do have lightning throttle response, and feel massively better than the (comparatively) asthmatic RV8 cars. Performance figures [acceleration AND top end] are still impressive though Jools wouldn't you say? Regardless of gearing.

Indeed, you can say that about any 1100ish kg car with over 300 bhp though (!), however that wasn't the point i was trying to make. lol.

[nubbin]

daftlad said:

Targarama said: Be interesting to see what Austec can do to fill in that torque curve ... Thanks for posting this Nubbin - it clearly shows the lack of torque. As Jools says, this is a 3.6 litre highly tuned engine and it's got a definite lack of mid range torque. Still, a nice smooth power curve. I assume that this is a read-out with the cats taken out. Would have been interesting to see a back to back comparison of the same car with the cats in place. I suspect that would fill the torque gap quite nicely. >> Edited by daftlad on Wednesday 16th February 07:09

Sorry, that's a standard 3.6, about 8000 miles on the clock. I'm having it de-catted in March after which I will repeat the RR, and see what difference it has made (not much I suspect).

[Mr Freefall]

mine was a standard 3.6, but with the TVR decatt chip which has some different mapping to the standard map frm a 3.6

Paul said he had 350 on the nail from a std mapp from TVR in his Tamora, so if he can get 375 from mine, then there ae some benchmarks being made right now.

What I will say its not all about the MAX figures. I will get the graph hosted soon, so you can see the results for yourself

Mr F

[Plotloss]

How much does the Tam/T350 weigh?