ihave a 2.88 and overdrive. cruise at ~1700rpm. pretty useful if you ask me. youll need OD at about 145mph depending on your rev limit. ive been well past that more than once.

 

.
We have now re manufactured the TWR slider throttle valves, CNC with several improvements and refinements. All parts are ali or stainless including stainless slider plate rollers a big improvement on the originals that suffered from corrosion here which I discovered when I had the originals stick in use.
.

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The trumpets are CNC machined from 5kg billet complete with injector blip unlike the originals that have this part tig welded in later. The cast slider top plate incorporates a fuel rail , just visible in the pic, which gives fuel cooling and temperature stability.
.

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The TWR logo was incorporated on the trumpets raised 0.5mm befiore the whole is vibratory polished, Not too easy to see in the pics
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The display engine is looking good, next is the custom starter, oil pump, cam carriers and covers, we have already made the pinion mount and chain guide/tensioner mounting
.

 

I see this is a timley post.
That's a great job done on the slide injection.!

I worked with that years ago on a magnesium slide set-up for a 427 Ford engine, and really liked it.
There was always a bug or two with distortion but worked that out with some teflon slides.

I've just delivered the XJ13 engine I built for Scott Pinsky's gorgeous car that Fran Hall of RCR has built for him.
This has my own design of EFI and there are 4 videos of it posted here.
The 2nd, 3rd, and 4th startups of it, which are short ones.
The last video is one that sums up some of the details of what's been done to it
I've posted some pictures of the test mule engine I used to work out some details, and get the EFI, the reverse flow cooling system, along with the ignition with the crank trigger so I could toss the dizzy as it was just in the way.
The short exhaust is not for that engine, but the beginnings of a set of headers for a customer's engine that's going to have a '36 Chevy Pickup built around the XJS running gear.

Note the engine was running without the aid of a TPS or an O2 sensor, and was just roughly sorted out so it will fire up and then will be tuned with a correct set of headers in the car.

I know it's not a DOHC engine, and the throttles aren't tipped like some might like to see it, but it is a Jag mill, which was the important thing, and not a crate engine.
I saw no sense in trying to disguise it to look like something it wasn't.
It is what it is, and the only one I will build exactly like this, as it was my prototype.
I hope you like it.

https://www.youtube.com/watch?v=iy9T...ature=youtu.be

JAGUAR XXJ 13 V12 ENGINE DETAIL VIDEO - YouTube

 

absolutly beautiful engines , approaching works of ART!

two different themes but more than the usual factory JAGUAR V12s.

there is something so special about a 12 cylinder engine!

hail the world of CNC!

 

WOW they are sexy - I have just put my wife on eBay

 

We are getting a batch of 84mm stroker cranks manufactured by the original TWR crank manufacturer, they will come with std mains and 2.1 B/E for the use of chevy rods unless anyone wants 2.3.
EN40B / original forgings.
If anyone one here wants one drop me a line and I will add it to the order, 50% deposit required; they will be at cost + £100 to cover carriage and my time. Been quoted twice this price elsewhere.
Dont wait or think too long about this if interested.

 

I must also put forward the sentiment, they are truly works of art, what wonderful work has being done! Wouldn't that look nice under the hood my XJS, "Ah" ill just keep dreaming.

 

xjr5006, i have to ask what would one cost, plus shipping into USA(Texas)?
thx ron

 

Nice work on that sexy V12.

 

Thanks Ron
I was thinking exactly the same thing, but ship to the world of Oz.

 

Shipping looks to be around the £140 mark (at cost) or you could arrange collection yourself it it works out better for you.
I wont put the price on here if you are seriously interested PM me and I will get back to you, Price only holds whilst i get this batch made. Once made there will be a jump in what I charge for them I can assure you.

 

Hi 5006,
Not sure how to Pm someone here yet, and have tried to contact you on the other stroker crank you were thinking about selling.
I am interested in one of the new ones also.
You can PM me if you would.
Thanks!

 

I was thinking about an XJS, thought 300-400 bhp might be enough, but I drove an SLS AMG with 565 hp once and it wasn't as grunty as you'd think... (although amazing).
Then I thought about 500 bhp from an XJS,
but it would cost a fortune and a lot of grief to achieve.
Then I wondered about trying to source a 5.0 supercharged V8 and slot it in.
But then the computers probably wouldn't talk to each other...

Then I remembered, Hey, they make this thing called a 5.0 XKR and it has 500 horsepower.. now there's a thought.

 

go big or go back!

Audi V12 diesel, 500hp, 700torque, twin turbos, direct injection, 30mpg.

remap 650hp 850 torque, 32mpg.

if your gonna spend the money, go over the top.

engine audi v12 diesel same weight as a Jag V12, ultra reliable, and economical.

and what a great conversation piece.

use a GM 4L80E auto transmission, 2.88 gear would be close to perfect, with the 30%overdrive of the trans.

 

500hp sure


I have a 1992 HE so I would be just fine with stage II or III
my AH I built a stage III engine by my self... on the cheap... at 9k rpm some thought it was a stage IV but I drove it fine on the street... ( keeping it under 4.5k) not on the cam yet... it was ok


do not have the money at this time...

just ship these guys your V12 and a nice check...


they will sell you a kit for you to put together too ( you have to send them your engine parts) they work them over and send them back for you to assemble...
heads cams and the lot
they also offer a stroker kit for the 5.3 to 5958cc so a satge II stroked would put out what?


stage I SRE Stage II Stage III Stage IV core kit dis
JAGUAR 3.8, 4.2 $6800 (291) $7600 (312) $7600 (331) $9000 (351) $11600 (412) $2000 $1200 JAGUAR V-12 HE $7800 (338) $8800 (362) $8800 (396) $10200 (464) $13400 (572) $2400 $1400 JAGUAR V-12 NON HE $7800 (372) $8800 (401) $8800 (432) $10200 (502) $13400 (647)


lost formatting above go to below, to see what I meant
http://www.paeco.com/Engine%20Price%20One.htm

 

Ron, the only minor issue with this Downunder is the cost. The car this engine came in is still $130K for the cheapest used car if you can find one.

A new Audi A8 V8 diesel is $275,000 plus on road

 

MY bad...
I thought this thread was about has any one made 500HP from the JAGUAR V12...

I will be glad to go to 350hp with a cam and valve springs

GB

 

jon i have done business with paeco, and did not like the quality of the workman ship(i wont go into what or why)!

and i'm quite sure that after 65yrs building engines,of all types, i can handle my own ideas! only thing now is i'm retired and 80yrs old.

and i have the same problem as you,cam doesnt come on till everyone has left me ,them i'm trying like hell to catch up, and the race is over!

without going into the whats&whys of a hi-performance 5.3L Jag V12 , many tests have been done and stroking has proven to be the most effective torque increase. factory 6.L STROKE IS NOT ENOUGH, at least 80mm or better 84mm what works the best.

hp is a debatable number ,TORQUE is what you feel,and makes you smile.

 

warrjon, yikes, cant believe the costs of living down under.

most likely i wont have an XJS diesel powered, i can get some cheap diesels in USA but ALL 12 cylinder ones are ungodly heavy!

the audi 6L V12 all aluminum is very close to the V12 jag, figures say from my book is 300kg.

of course anything unusual and different would be expensive, but some on here might just step up and go for it! gotta plant the seed!

gearing the diesel may require some care but the are many ratios available for the Dana 44 rear, but can you imagine what it feels like to have 100% or more torque, compared to jag v12, and the 4L80E can be built strong.

there was an engine on Ebay about 6mth ago ,bids started at $10K dont know what it sold at, but i'm not the only one thinking out of the box.

 

Forget the cam and springs, stock springs are good for 7000rpm.

The easiest power is from exhaust manifold, downpipes and intake.

The Jag V12 intake ports have very roughly cut (looks like it has been done with a drill press and large coutersinking bit) intake ports. Blend these ports without opening the port inside.

Do the same with the intake manifolds removing all the casting flaws. All of this and cold air intakes should give you a bit better than 350hp