If you're able, what exactly has your team done to the V12 to make it produce these numbers? Was anything exotic like making a billet block, forged internals or something like that required or is this off of a mostly stock Jag V12 block with like a new ECU, exhaust, intake clean up, I am assuming some mild cams, and a tune? Is there anything more specifically done if you're able to let me know? I have done some work on my Jag XJS V12, work being a decent intake manifold port and polish, bored open 70mm TB's which I'll be doing quad 70mm TB's soon, full straight pipe 2.5" I.D exhaust into 3" X pipe 3/4 way down the car back out to dual exhaust and over axles into kind of open flow mufflers, fuel pressure regulator, all emissions and unneeded components that weren't needed in the basic start up and running of the car was removed, ~85amp alternator, A/C delete, dual 3k CFM electronic fans, and some other things. I am going to be getting your ECU and DIS system, potentially some "race spec" cams from Rob Beere Racing UK, reverse flow for the cooling and couple other things down the line, would love your input to optimize what I have done and anything you think is important that should/shouldn't be done. Thank you very much in advance!
where did you get the quoted figure of 490HP for 1984, the reports at the time was 450 and several ex team members have said it was closer to 440 in ETCC trim and 410 in SPA 24 hour trim
Well, yes, historic hp figures is hard to get right and guarantee. But in Allan Scotts book he quote the final spec in 84 as 490 hp. But then again, often when you see a number in the engine dyno, there will be another number when engine is installed in a car at a different day.
No turbo here.. naturally aspirated only, power come from lot of correct work regarding port flow, camchoise, compression, manifold tuning and close attension to all spesifications and making everything work together correctly
Fantastic. So many years of work and research paying off! Congratulations.
Congrats Ole to you & team
I got these numbers from my pre he running on methanol and big cams and porting etc. Blew it up not long after split the bore.
Very nice.
I have 1983 xjs without cruise control. Is there a way to add cruise control yo your system?
If you're able, what exactly has your team done to the V12 to make it produce these numbers? Was anything exotic like making a billet block, forged internals or something like that required or is this off of a mostly stock Jag V12 block with like a new ECU, exhaust, intake clean up, I am assuming some mild cams, and a tune? Is there anything more specifically done if you're able to let me know?
I have done some work on my Jag XJS V12, work being a decent intake manifold port and polish, bored open 70mm TB's which I'll be doing quad 70mm TB's soon, full straight pipe 2.5" I.D exhaust into 3" X pipe 3/4 way down the car back out to dual exhaust and over axles into kind of open flow mufflers, fuel pressure regulator, all emissions and unneeded components that weren't needed in the basic start up and running of the car was removed, ~85amp alternator, A/C delete, dual 3k CFM electronic fans, and some other things.
I am going to be getting your ECU and DIS system, potentially some "race spec" cams from Rob Beere Racing UK, reverse flow for the cooling and couple other things down the line, would love your input to optimize what I have done and anything you think is important that should/shouldn't be done. Thank you very much in advance!
Superb stuff! What cams are you running?
Hi Paul, its my own design, made with help from Catcams as I imagined the Gr.A cams spec was. I think I got ti pretty close.
@@OleMartinMobeck It’s a credit to your hard work, you must be proud of it.
where did you get the quoted figure of 490HP for 1984, the reports at the time was 450 and several ex team members have said it was closer to 440 in ETCC trim and 410 in SPA 24 hour trim
Well, yes, historic hp figures is hard to get right and guarantee. But in Allan Scotts book he quote the final spec in 84 as 490 hp. But then again, often when you see a number in the engine dyno, there will be another number when engine is installed in a car at a different day.
What modifications where made to the standard 5.3 L engine to get that power?
Is it Turbocharged?
No turbo here.. naturally aspirated only, power come from lot of correct work regarding port flow, camchoise, compression, manifold tuning and close attension to all spesifications and making everything work together correctly
Available for purchase?
I dont have any complete engine for sale now, but I can build one, any spec.