|
BDM
Original Poster
283 posts
9 months
|
Do you think the Speed6 lacks torque compared to say the V8s? Is it a considerable difference?
My mates V8 Cerby does 'seem' faster, more raw (if that makes sense?)...
|
|
|
spitfire4v8
756 posts
8 months
|
the sp6 cars are way down on midrange power compared to the ajp8.
for example a couple of seasons ago we ran a track/race orientated sp6 engine in a race car. it made about 380hp (peak) installed. a race cerbera that i was also involved with in a small way made an installed peak of around 405hp .. 25hp difference at the top end.
however .. come down to around 5000rpm and the ajp8 was still making 360hp .. the sp6 was making 260hp ... 100hp LESS than the ajp8.
the sp6 cars are very very poor in the midrange compared to an ajp8.
|
|
|
rens914
243 posts
58 months
|
i think de-catting and chipping can make a big difference but will never close that big gap
rens
|
|
|
plasticman
412 posts
78 months
|
Theres an idea for more power !!!!!
|
|
|
Mark A S
403 posts
15 months
|
4.3, there is your answer  380 to 400 torques, depending on spec.
|
Advertisement
|
|
|
spitfire4v8
756 posts
8 months
|
depending on spec and depending on dyno 
|
|
|
so called
1,171 posts
36 months
|
I recently decatted my Mk 2 Tuscan. What a difference 
|
|
|
Mark A S
403 posts
15 months
|
spitfire4v8 said: depending on spec and depending on dyno You obviously doubt some dyno [ do you mean RR ? ] readings then? What Dyno do you use? Whether mine has what it has registered on TVR powers RR or not, out on the road, the difference is very noticeable
|
|
|
Chequred Demon
480 posts
21 months
|
I am reliably informed that the early Tuscans had more Torque but less horse power than later cars?
In addition that early SP6s require a new chip to improve mid range fuelling?
I have been on a track with a Cerbera with a mildly tuned AJPV8 and it was much faster.
|
|
|
Ticker
262 posts
75 months
|
Chequered Demon,
are you saying that the 4.2 / 4.5 AJP was / is much quicker than a Tusc, was it a S?.
I believed all Tivs at this range / level were all about the same, straight line driving, and the driver was the main difference (unmodded obviously)
Thanks, surprisingly
Dave
|
|
|
Chequred Demon
480 posts
21 months
|
I don't know how tuned up the AJP V8 was, but it was a lot quicker on top end and acceleration. It was belching fire from the zorst at every gear change though? I don't remember the blokes name but he stated he had just purchased the vehicle.
My Tuscan is a non S but seems as fast as is the norm, there were other Tuscans and supercharged Chimaeras and we were keeping up with most things apart from the out and out racers.
|
|
|
spitfire4v8
756 posts
8 months
|
Mark A S said: spitfire4v8 said: depending on spec and depending on dyno You obviously doubt some dyno [ do you mean RR ? ] readings then? What Dyno do you use? Whether mine has what it has registered on TVR powers RR or not, out on the road, the difference is very noticeable Oh yes, dynos vary you can't get away from that. there's lots of interesting reading on dyno comparisons on the net. I have a dyno dynamics .. well known for being a pessimistic (more realistic?) dyno. But it's a whole can of worms done to death on ph many times. If you want some light entertainment before bed though google dyno dynamics v dynojet v mustang v etc etc
|
|
|
nelly1
2,428 posts
58 months
|
spitfire4v8 said: Mark A S said: spitfire4v8 said: depending on spec and depending on dyno You obviously doubt some dyno [ do you mean RR ? ] readings then? What Dyno do you use? Whether mine has what it has registered on TVR powers RR or not, out on the road, the difference is very noticeable Oh yes, dynos vary you can't get away from that. there's lots of interesting reading on dyno comparisons on the net. I have a dyno dynamics .. well known for being a pessimistic (more realistic?) dyno. But it's a whole can of worms done to death on ph many times. If you want some light entertainment before bed though google dyno dynamics v dynojet v mustang v etc etc Don't forget 'Correction Factors', '3rd vs 4th gear', 'Transmission Losses', 'Who did the Tuning' and 'Has it been on the Surrey Rolling Road yet'?
|
|
|
spitfire4v8
756 posts
8 months
|
nelly1 said: spitfire4v8 said: Mark A S said: spitfire4v8 said: depending on spec and depending on dyno You obviously doubt some dyno [ do you mean RR ? ] readings then? What Dyno do you use? Whether mine has what it has registered on TVR powers RR or not, out on the road, the difference is very noticeable Oh yes, dynos vary you can't get away from that. there's lots of interesting reading on dyno comparisons on the net. I have a dyno dynamics .. well known for being a pessimistic (more realistic?) dyno. But it's a whole can of worms done to death on ph many times. If you want some light entertainment before bed though google dyno dynamics v dynojet v mustang v etc etc Don't forget 'Correction Factors', '3rd vs 4th gear', 'Transmission Losses', 'Who did the Tuning' and 'Has it been on the Surrey Rolling Road yet'? [churchilldog] Oooooh Yessss [/churchilldog]
|
|
