That is if I would use a 17% drivetrain loss, than I have achieved 705 HP!

I think however that I am not there yet, but am getting close and am able to do still more.

So the result of today’s dyno, was 585.4 rwhp and 699.9 nm

With 15% it would be 689 hp

And one interesting one, there was a stock Jaguar XKR-S 5.0, where the dyno operator added 10% losses to get to 550 hp. Then printed mine with these same losses which would result in 648 hp.

I do think however that my car has higher losses, as my torque converter doesn't lock up, but who cares at these figures ;-)

So all in all pretty promising results, and there is an easy gain by changing to a smaller pulley (this was now 2.7 and I have a 2.5 ready ;-)).

Attached the results.
Unfortunately one if my files is gone where I got the 524 rwhp my highest with my old setup. So an older 506 was used to have something to compare to what I had earlier with my 4.2 engine, and that was also with a 2.7 upper pulley, but only 506 measurement.

 

Great We try to follow................

 

Amazing results! This is the highest dyno I've seen for any jaguar, including any of the tuned 5.0 SC cars which are on this forum. So you essentially gained around 60rwhp from the new engine with the same pulley ratio. Time to put that 2.5" upper on and blast through 600rwhp

 

Congratulations!!! Fantastic to see published data of what the engine can do.

 

Thanks!
I didn't know I was already this far and came to the dyno with low expectations, especially as I was/am unsure about the cam timings I use.

Even though the dyno readings where very good, I am still sure I should be able to squeeze out more but lack the knowledge to workout what the best next setting could be. It takes me about 3 hours to change the timing, so relatively fast, however with the after testing and setting it again to something else (without knowing what would be best), am a little hard pressed check more.

There isn't a lot of room to increase the overlap, this setting gives just enough vacuum for our low idle of 600 rpm.

So my main thought is to delay the intake more, but am very unsure about it.

Attached are my current timing settings, so if anyone has any ideas of what could be better timing settings that would be great to hear.

PS not sure if the .50 was accurate, as I only found an excel sheet with rough values, but it should be close.

 

Very nice to see your plans worked like you want!
How much displacement are you using now?
Habe you ever tested/recorded a 100-200 Run with a Performance Box or other similar tools?

Best regards from Munich and merry christmas!

 

No tests, and these speeds are not very legal over here. But I can tell you the acceleration is phenomenal at higher speeds in 3rd.

 

Ok, my thoughts were may you've tested it here in Germany on the Autobahn.

Either way, last weekend a friend gave me his 997.2 Turbo PDK 100-200 7.5sec and please dont get me wrong, but i was disappointed from the performance.

I'm nearly done with the conception of my engine, so im now searching for results what is the capability of a XJR/XKR with this range of power.

Cause i wont spend more then 25000,-€ and run 100-200 over 7 sec

Best regards.

 

I would definitely like to go to Germany next year, even my kids are asking me ;-)

You have ambitious plans, here are some figures:
https://www.facebook.com/notes/garaj...3619823359736/

 

In case you come over, let me know, we could catch up somewhere and i could provide a Performance Box.

Best regards from Munich!

 

Today I did another run, but this time instead of the 2.7”, I went straight to the 2.5” pulley.
The results were really what I hoped for, this twin-screw is just a beast, it just pushes out more and more the fast your spin it.

It measured 632 rwhp this time, roughly what it also should have done when you just compare the added airflow with the smaller pulley.

And there is still room left, I guess with a 2.4” pulley I will be able to get to about 658 rwhp.

When compared to the XKR-S run, bumping that to 11% drivetrain loss, my engine would be pushing out 701 HP, and as my TC doesn’t lock up it will be probably more than 701, but am happy to accept about 700 ;-)

Am ecstatic about the results, and will enjoy it for a while, although I know there is still room for more ;-)

 

Belated Happy New Year everybody!

Very nice to see that it works like you want!

If you find enough time to visit Germany would be great!
I think your car should be able to beat 7 sec mark from 100-200

For example the Evolve F10 M5 does this task in 6.2 sec with about 682 HP and 850NM on the flywheel.
The M5 has a faster gearbox and i think the torque range is wider but the Jag is about 200kg lighter.

Like i said, if you like we could catch up and i will bring my Performance Box.

Best regards from Munich!
Maxi

 

Incredible Andre, and the kind of results I expected from pushing the 2.6 to higher rpms. My car is going in at the end of the month as you know for installing the Opcon with the 2.16 pulley and I'll update the forum with the dyno sheet . After that I'm saving for your kit.

Thanim

 

Since the rpm range 4-6K matters when WOT at D, the torque curve can not be better than Andre has now. It's almost flat up to gear change.

 

Indeed as XJR-99 says, it’s a flat line between 4000 and 6000 rpm of about 800nm, and possibly higher lower in the rpm range.
My car weighs about 1820 kg (full tank), its indeed damn fast, so I would need a dry (German) road to test the 100-200.

Coming back to cams, after checking some forced induction cams, (and leaving a little bit the miller cycle thought), the attached setting might be possible (although I may still have to decrease the overlap a tad), so may try that one soon, but would appreciate also any comments.

 

Is it time to try with funny fuels yet?

 

It's amazing.

I'm wondering what will break first

(Drive with care BTW!)

 

I am not so much looking for more power now, but more to optimize the setup as it is now. So with a better Cam setting I would reduce the supercharger speed yet maintaining the same power level.

Personally I am not interested in funny fuels, the maximum optimized street setup is what I am after.

Am wondering what could break since 2007 already, so far the weakest spot is the dif, but who knows time will tell.

 

Amazingly flat powerband!!!!

 

Havent had a look for the torque curve, sorry my bad.

To the cams, over the last weeks ive talked with serveral people and two of them seems pretty good at this area.

One of them was among others involved in the Peugeot Groupe B rallye programme.

The next time i would like to generate a vale lift curve and then we will have a look.

Or is there a already a exact vale lift curve Dia?

Best regards