Thread: Disco 4 SDV6 3 Litre power/torque upgrade

Originally Posted by DiscoJeffster

The TD and SD 3.0L engines are identical. It is only the tune that varies and the additional power is a reflection of the boost level. This is obvious when one goes and looks at the part numbers for the bottom end where there is no SD/TD differentiation.

That’s what I’ve been told by TRS also. They say the only difference between the SDV6 and the TDV6 is the tune. Same engine, turbos, etc

Originally Posted by Dagilmo

However, Gally at autocade said he only takes the TDV6 to the SDV6 (untuned) figures and the SDV6 he takes to the TDV8 based on the SDV6 having stronger conrods and pistons than the TDV6.

Make what you will from above.

I was under the impression that Autocode would/could tune a TDV6 and SDV6 D4 upto the 215Kw/600Nm of the SDV6 SE/HSE Range Rover Sport as these use the same 306DT engine.

Originally Posted by Tombie

If I post mine up I can assure you it’s within 1%

Calibration took a little while but I have it sorted on mine.

Hey tombie how did you calibrate though the IIDTool. And if so what did you change in the settings

Originally Posted by coopers1969

Hey tombie how did you calibrate though the IIDTool. And if so what did you change in the settings

Good question, I’ve slept a few times and had a few drinks since then..

Originally Posted by Eric SDV6SE

Yes notedit is a lottery. Mine's done 195,000Km and had the remap, no issues to date (touch wood), DJ has the same car, and had had to replace both manifolds, others have done far less kms and had them fail, others done many more trouble free kms, definitely a random thing, can't seem to do much to prevent it.

My tune runs about 2psi over standard across the rpm range, my Rovacom shows a peak of about 178psi manifold pressie under hard acceleration held in 3rd . Current issue is the inlet plenum o ring clip dislodging, and one of the manifold outlet o rings is leaking. New orings on the way..

I was playing with my rovacom IQ today also and noticed a pretty wild boost figure, you'll need to change your settings to reading in kPa. Mine was at 178PSI its no wonder these things blow inlet manifolds, i looked down, seen the figures and pulled off the road to see what the hell was going on, the barometric pressure of 70psi made me feel better while i change the units back to kPa and re read the data. Ill send BBS an email tonight

Haha. Yeah. These turbos are not large enough to generate 178psi or the system capable of containing it! I presumed it was meant to read kpa

Yes that did seem high now that I think about it, I’ll change the VCIQ settings to kPa and check on the BBS website, I suspect there’s quite a large offset that needs adjusting....ta for the heads up...

When its in kPa it is dead accurate against any other scan tool i put it against, i guess its just when someone set up the conversion they mis keyed a digit for the maths. Just stay in kPa on rovacom IQ untill they tell us there is an upgrade to the software, i emailed and left them a forum message, they seem to be pretty quick with these things