Discussion
It is always interesting to look at graphs to see how the power is made.
The advantage of the speed 6 engine is that it will rev and produces good power at the top end. The above figures being very good.
You might be interested in my old Rover 5.5 graph by comparison.
The lower figures are with the cam timed at 110 degrees
The upper figures are with the cam timed at 114 degrees
All runs done on Joolz dyno which gives, "non inflated" readings.
The advantage of the speed 6 engine is that it will rev and produces good power at the top end. The above figures being very good.
You might be interested in my old Rover 5.5 graph by comparison.
The lower figures are with the cam timed at 110 degrees
The upper figures are with the cam timed at 114 degrees
All runs done on Joolz dyno which gives, "non inflated" readings.
GazzaM100 said:
I thought TVR quoted 350 from a 3.6L not the 4.0L in a Tamora
Back in the day (2002-2004-ish) there were plenty of threads (which can still be accessed), showing that the S6 produced more or less the quoted factory figures for BHP and torque, whereas the older V8's were massively under the quoted figures. These were tested on different dynos, and not just one, the 3.6 was/is usually around 350bhp at the fly, plus or minus 5-10 BHP, and the 4 litre, depending on flavour (standard. Red Rose) was 360-370BHP.Compared to the RV8 models, the figures for the S6 seemed quite honest, I don't know where these new low figures for the S6 come from!
I have now spent a few hundred miles in the 4.3 since the remap and whilst I'm less inclined to get into arguments over the headline figure (which feels about right from the car's performance IMO), I can reveal that it is fantastic!
Relentlessly fast! Possibly too fast for the public road. The acceleration does not seem to let up at all.
5th gear pulls like 3 gear did in the 3.6.
I've just ordered 4 new tyres to replace the 5 year old rubber that was on there before which I expect will help a great deal in taming the car.
So 470whp, 400whp or 100whp. It is marvellously quick!
Relentlessly fast! Possibly too fast for the public road. The acceleration does not seem to let up at all.
5th gear pulls like 3 gear did in the 3.6.
I've just ordered 4 new tyres to replace the 5 year old rubber that was on there before which I expect will help a great deal in taming the car.
So 470whp, 400whp or 100whp. It is marvellously quick!
GazzaM100 said:
I thought TVR quoted 350 from a 3.6L not the 4.0L in a Tamora
Sagaris is a 4.0. I've been at two rolling road sessions with factory sags that produced 350-360bhpOne of those sessions had a rebuilt speed 6 at 384bhp.
Just think how well these cars would have sold with a reliable 450bhp when they were new. That would have been brilliant then compared to other cars around at the time.
Edited by Byker28i on Monday 19th February 20:52
lawtoni said:
I have now spent a few hundred miles in the 4.3 since the remap and whilst I'm less inclined to get into arguments over the headline figure (which feels about right from the car's performance IMO), I can reveal that it is fantastic!
Relentlessly fast! Possibly too fast for the public road. The acceleration does not seem to let up at all.
5th gear pulls like 3 gear did in the 3.6.
I've just ordered 4 new tyres to replace the 5 year old rubber that was on there before which I expect will help a great deal in taming the car.
So 470whp, 400whp or 100whp. It is marvellously quick!
Well said Paul, you pays your money and your happy with the result. EnjoyRelentlessly fast! Possibly too fast for the public road. The acceleration does not seem to let up at all.
5th gear pulls like 3 gear did in the 3.6.
I've just ordered 4 new tyres to replace the 5 year old rubber that was on there before which I expect will help a great deal in taming the car.
So 470whp, 400whp or 100whp. It is marvellously quick!
phazed said:
It is always interesting to look at graphs to see how the power is made.
The advantage of the speed 6 engine is that it will rev and produces good power at the top end. The above figures being very good.
You might be interested in my old Rover 5.5 graph by comparison.
The lower figures are with the cam timed at 110 degrees
The upper figures are with the cam timed at 114 degrees
All runs done on Joolz dyno which gives, "non inflated" readings.
Interesting how he’s taken out a little torque but gained quite a lot of hp. The advantage of the speed 6 engine is that it will rev and produces good power at the top end. The above figures being very good.
You might be interested in my old Rover 5.5 graph by comparison.
The lower figures are with the cam timed at 110 degrees
The upper figures are with the cam timed at 114 degrees
All runs done on Joolz dyno which gives, "non inflated" readings.
Timing maybe.
Hmmm, food for thought
I won't pretend to know anything about the S6, but what I do know is that I met a bloke the other week with a Powers 4.3 rebuild producing a genuine proven (give or take RR discrepancies) 400hp. He lives in Chippenham so whether the car was dyno'd at Powers or somewhere more local to him I'm not sure.
Contrast that to the Tuscan that did a dyno run at the NG open day with a 4.3 rebuild of unknown origin (could have been a reputable builder, I can't remember), which produced a pretty dismal number somewhere south of 240hp. Minefield!
Contrast that to the Tuscan that did a dyno run at the NG open day with a 4.3 rebuild of unknown origin (could have been a reputable builder, I can't remember), which produced a pretty dismal number somewhere south of 240hp. Minefield!
Here’s my 450 on Powers dyno after Mbe.
Standard P38 induction system etc no tuning mods as such so pretty standard, new cam but even that had 15,000 miles on it by the time this was done.
Catted too.
At the wheels so adding 15% roadtrain loss !
It’s still only about 292/333
But about right considering the spec of engine.
It sort of corolates on a drag strip too.
Going up against another Chim with 5.0 engine and tuned to about 315/320 hp but torque similar the Yellow car pulls away over 4000 revs exactly where the hp is.
The results on a drag strip to me showed the difference in the power and how it shows in real life.
I believe the dyno from this testing.
Standard P38 induction system etc no tuning mods as such so pretty standard, new cam but even that had 15,000 miles on it by the time this was done.
Catted too.
At the wheels so adding 15% roadtrain loss !
It’s still only about 292/333
But about right considering the spec of engine.
It sort of corolates on a drag strip too.
Going up against another Chim with 5.0 engine and tuned to about 315/320 hp but torque similar the Yellow car pulls away over 4000 revs exactly where the hp is.
The results on a drag strip to me showed the difference in the power and how it shows in real life.
I believe the dyno from this testing.
Edited by Classic Chim on Tuesday 20th February 19:23
Edited by Classic Chim on Tuesday 20th February 19:28
lawtoni said:
I have now spent a few hundred miles in the 4.3 since the remap and whilst I'm less inclined to get into arguments over the headline figure (which feels about right from the car's performance IMO), I can reveal that it is fantastic!
Relentlessly fast! Possibly too fast for the public road. The acceleration does not seem to let up at all.
5th gear pulls like 3 gear did in the 3.6.
I've just ordered 4 new tyres to replace the 5 year old rubber that was on there before which I expect will help a great deal in taming the car.
So 470whp, 400whp or 100whp. It is marvellously quick!
Exactly.. Numbers aside, you are happy with the engine, and it will be more reliable. Perfect. I am sure it is quicker and much torquier than it was!Relentlessly fast! Possibly too fast for the public road. The acceleration does not seem to let up at all.
5th gear pulls like 3 gear did in the 3.6.
I've just ordered 4 new tyres to replace the 5 year old rubber that was on there before which I expect will help a great deal in taming the car.
So 470whp, 400whp or 100whp. It is marvellously quick!
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