Bespoke Re-map to suit decatted Tuscan
Discussion
I took the car to TVR Power to have the ECU remapped by John Ravenscroft. The remap has been done specifically to suit my design of Decat pipe fitted to a standard 4.0L Tuscan. The results are staggering. Below is the before and after graphs. The blue line shows the Power / Torque lines with cats fitted and running the factory map. The red line shows the Power / Torque lines with the decat pipes fitted and running bespoke map. The Power figures ARE AT THE WHEELS.
As can be seen, there is an increase in power of 29.43 BHP and an increase in torque of 47.98 ft-lbs.
The car feels a lot smoother to drive and the power delivery is awesome.
In theory, according to John, the car should be able to pass an MOT emmissions test. This will be tested next week when I have a bit more time and I'll let you know the result.
As can be seen, there is an increase in power of 29.43 BHP and an increase in torque of 47.98 ft-lbs.
The car feels a lot smoother to drive and the power delivery is awesome.
In theory, according to John, the car should be able to pass an MOT emmissions test. This will be tested next week when I have a bit more time and I'll let you know the result.
Crikey Dave, that's a hell of an improvement! Did you get flywheel figures too? I have been thinking of doing this myself and, whilst the general concensus is that a SP6 remap wouldn't yield much top-end BHP improvements, I would be more interested in the smoothness of the map across the whole range.
Nice one!
Andy
PS: Cost?
Nice one!
Andy
PS: Cost?
madbadger said:
S5TVR said:
I'm a big fan of re-maps and I'm pleased you're happy with the results, but another 30bhp at the wheels just can't be right. 293bhp at the wheels for a 4.0 SP6 engine is good to start with.
Must be something to do with the decat then!Bet that would sound good too...
I'll have to get to a rolling road now. I've got Daves decatts on the Tamora, but nothing else done. The design is quite different to a standard decat where the cat material is just removed from the box.
Had you had the decat done for LeMans? I was next to you leaving the ferry, and the T350 sounded sweet then.
Had you had the decat done for LeMans? I was next to you leaving the ferry, and the T350 sounded sweet then.
madbadger said:
I'll have to get to a rolling road now. I've got Daves decatts on the Tamora, but nothing else done. The design is quite different to a standard decat where the cat material is just removed from the box.
Had you had the decat done for LeMans? I was next to you leaving the ferry, and the T350 sounded sweet then.
No, the de-catt was done after Le Mans and it does sound much better now. I've got a JP back box on which sounds good, but looks crap IMHO and probably creates a bit of unnecessary back pressure. The car is currently with Hayward & Scott who are producing a bespoke rear section for me as well as replacing the current silencers with a couple of bigger ones, so the whole system should be a bit more free flowing - it was actually the de-cat that made me realise how sensitive the engine is to back-pressure.Had you had the decat done for LeMans? I was next to you leaving the ferry, and the T350 sounded sweet then.
S5TVR said:
madbadger said:
S5TVR said:
I'm a big fan of re-maps and I'm pleased you're happy with the results, but another 30bhp at the wheels just can't be right. 293bhp at the wheels for a 4.0 SP6 engine is good to start with.
Must be something to do with the decat then!Bet that would sound good too...
).All the work on my car was done by John Ravenscroft, who really knows his stuff. John, Dom, and Jason were all surprised at the figures. I'll try to get the map off Dom for the second run where the decat pipes were fitted but running the standard map.
As for which rolling road was used, I'm not sure that makes any difference in this case. Its the differential figures that are important.
As a matter of interest, was yours an "off the shelf" chip?
NTEL said:
S5TVR said:
madbadger said:
S5TVR said:
I'm a big fan of re-maps and I'm pleased you're happy with the results, but another 30bhp at the wheels just can't be right. 293bhp at the wheels for a 4.0 SP6 engine is good to start with.
Must be something to do with the decat then!Bet that would sound good too...
).All the work on my car was done by John Ravenscroft, who really knows his stuff. John, Dom, and Jason were all surprised at the figures. I'll try to get the map off Dom for the second run where the decat pipes were fitted but running the standard map.
As for which rolling road was used, I'm not sure that makes any difference in this case. Its the differential figures that are important.
As a matter of interest, was yours an "off the shelf" chip?
You're on a loser posting Dyno plots on PH, they always have some thing wrong with them (and I've had a pop before so I'm probably no better than the rest).
Personally, I would have spent my money on trying to quiten the car down or donating the dosh it to the Charity for Deaf Dogs with a fear of Silver and Yellow cars made in Blackpool (I now have one as consequence of following you and Dot
) The replacement chip I had put in wasn't off the shelf, but was mapped on a bespoke basis by Paul at Austec. I've been to a few rolling road sessions now and frankly they are a bit of a waste of time for making comparsions between cars unless the cars being compared were on the same rollers and preferably on the same day. Also, the way in which runs are conducted make a big difference - for example my car (prior to re-map) put out a staggering 40bhp less on one set of rollers compared to another - the difference being due to the gear the run was done in. Personally, I think what is telling is when you overlay the before and after results without getting bogged down too much by peak figures - for me it was the increases throughout the rev range range (low down in particular) that were staggering and for me made the whole thing really worth while. There'a a lot of people out there still who question the benefits of re-mapping the SP6, but I haven't come across a single person who has had it done and thinks it wasn't good value for money.
Also, if you really want to see how your car compares to others go along to an event like Fighting Torque - there's not a huge amount of driver skill involved, so if you're creaming everyone you know you have fast car pure and simple.
Also, if you really want to see how your car compares to others go along to an event like Fighting Torque - there's not a huge amount of driver skill involved, so if you're creaming everyone you know you have fast car pure and simple.
NTEL said:
S5TVR said:
madbadger said:
S5TVR said:
I'm a big fan of re-maps and I'm pleased you're happy with the results, but another 30bhp at the wheels just can't be right. 293bhp at the wheels for a 4.0 SP6 engine is good to start with.
Must be something to do with the decat then!Bet that would sound good too...
).All the work on my car was done by John Ravenscroft, who really knows his stuff. John, Dom, and Jason were all surprised at the figures. I'll try to get the map off Dom for the second run where the decat pipes were fitted but running the standard map.
As for which rolling road was used, I'm not sure that makes any difference in this case. Its the differential figures that are important.
As a matter of interest, was yours an "off the shelf" chip?
, i've never seen that increase before on a SP6 .. i reckon on about 10hp, maybe a bit more with a decat as mentioned above. Were your cats blokced beforehand and maybe skewing the end result a bit perhaps? anyway whatever the scenario, if the car's more powerful then it's quicker Daftlad said:
Sensible attitude Dave, would expect nothing else.
You're on a loser posting Dyno plots on PH, they always have some thing wrong with them (and I've had a pop before so I'm probably no better than the rest).
Personally, I would have spent my money on trying to quiten the car down or donating the dosh it to the Charity for Deaf Dogs with a fear of Silver and Yellow cars made in Blackpool (I now have one as consequence of following you and Dot)
Hi John, I thought I might get a bit of flack for posting the graphs but, hey, the proof is in the eating. The car is much quicker and pulls like a bleedin' train.You're on a loser posting Dyno plots on PH, they always have some thing wrong with them (and I've had a pop before so I'm probably no better than the rest).
Personally, I would have spent my money on trying to quiten the car down or donating the dosh it to the Charity for Deaf Dogs with a fear of Silver and Yellow cars made in Blackpool (I now have one as consequence of following you and Dot
) As for the noise, well, the journey back from the Blackpool run, a couple of weeks ago, sorted that out when one of the loud cans fell off on the M6 and got squashed by a Renault. Had the standard cans on since then so much quieter now.
By the way. We are both sorry about damaging Daftdog mate
trackcar said:
6 power runs doesnt sound many .. was only full throttle mapped and nothing else? it's a day's work to remap a car properly all through the rev/throttle sites, how long were you there for? Those are great numbers , i've never seen that increase before on a SP6 .. i reckon on about 10hp, maybe a bit more with a decat as mentioned above. Were your cats blokced beforehand and maybe skewing the end result a bit perhaps? anyway whatever the scenario, if the car's more powerful then it's quicker
Hi Joules, they were working on the car for about 5 hours. Fuel pressure was increased a bit and all the throttles were adjusted. The cats were in very good condition. I understand from John, that the remap was across the range. Like I mentioned earlier, the car now pulls like a train. , i've never seen that increase before on a SP6 .. i reckon on about 10hp, maybe a bit more with a decat as mentioned above. Were your cats blokced beforehand and maybe skewing the end result a bit perhaps? anyway whatever the scenario, if the car's more powerful then it's quicker 
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