2jz twin turbo vs rb26dett, it will always be controversial.
they both are such good sounding engines, but the 2jz is capable of more power if im not mistaken.

 

Aaron, any updates?

 

It's almost there!!! Intercooler piping done, Supra radiator mounted (the top brackets are just temporary though), power steering all plumbed including a cooler, AN-8 braided fuel line running all the way to the trunk, motor mounts all done, heater hoses all hooked up to the engine and a Supra heater control valve, throttle cable hooked up.

 

This has been a great project so far, thank's for sharing. Look forward to your continued updates.

All the best,

 

looks like a GREAT project . My XJS project is almost done. Just one more fuel line to go!

 

It drives!!! We finally got it to the point were we can drive it! Man this has been a lot more work then I originally expected. I got the fuel system dialed in with an inline Walbro high pressure pump and two filters, new Koyo radiator, I got a MUCH larger 30 row transmission oil cooler, new Bilstein shocks front and rear, just ordered a set of poly bushings for the front suspension.

With the new lighter weight engine, and no park bench sized front bumper, the car sat a good 1.5 inches higher in the front then stock. I couldn't find lowering springs, and with less weight in the front I didn't want higher spring rate spring anyway.... So I cut about one coil off the bottom of the front springs, and with my trusty oxy-acetlyene torch I heated and bent the last coil to be more flat like stock. This mod gave us the perfect drop that we wanted. It lowered the car around 2" in the front, which gives it a little rake, and that makes the car look like it's fast just sitting there!

Next thing to get is a set of 18" wheels, and it looks like we can fit a 18"x9.5" wheel in the back, possibly with a 275x40x18 tire! It's going to take a wheel with about a +45 offset.

The transmission is going to take more work to get it dialed in. It needs a custom torque converter, and adjustment to the shift point for load and rpm.

The power steering works excellent, the stock oil ressure gauge works, the alternator is charging, and once it hits full boost at about 4500rpm it takes off like crazy!

I have lots of pics to post, I'll try to get them uploaded this weekend.

 

sweet, gotta see the pics and vids

 

Very cool!!

 

awesome man, glad to see your finally looking towards the finish line. You can come over and put one of those in my xj6 whenever you get bored.

 

 

Tonight I was able to get the engine temp working, along with the tachometer! Incredibly the tach works perfectly with the 2jz ignition! And the Jaguar stock temp gauge is almost exactly correct using the 2jz coolant temp sensor! So now I have ALL the gauges working, including the coolant reservoir light! We turned the stock Jaguar coolant fill tank into an overflow bottle for the Toyota radiator!

Last, but not least, we need to hook up and adjust the parking brakes. Since it was adjusted by the previous owner for the old worn out parking brake pads, we need to put some slack back in the cable at the handle, so that we can connect the new rear parking brake calipers with the brand new pads.

Here's some more pics!


Front view of intercooler, the hood is finally back on!



Side view with new ride height.




New mandrel bent 3" exhaust I made today, with 3" turbo muffler, and a simple turndown outlet. We wrapped all the piping with 2" graphite color exhaust wrap, because the piping runs pretty close to the trans and the underside of the car for the best possible ground clearance.


Exhaust installed, view from underneath


Here you can see how the exhaust tucks up nicely when installed.



Plenty of ground clearance for engine, trans, and exhaust.




The new Bilstein shocks made a HUGE improvement in the ride quality!!!

 

So I finally go the exhaust done tonight and it's time to take my good buddy for a first real test drive (he's an awesome transmission mechanic!) to show him how it runs, so he can tell me the best options for the transmission mods for the new engine. I manually put it in first and it takes off like crazy as soon as the boost comes on, I shift at probably 6k rpm or so, and as it hits second gear at like 40mph it lays rubber for a good distance and then pulls hard to about 6k again, then shift to third ..... and then it cruises nicely in third at about 2.5k rpm at 70mph.

 

Awesome job, I'm amazed this is all put together already.

 

What a terrific job. Lots of details to take care of. Do you still have the wiring harness from the XJS, and if so woule you be interested in selling it?

 

Thanks guys! I do have the entire V12 engine here at the shop, but the harness was in bad shape to begin with. The engine is fairly complete otherwise, I would take $200 for the whole thing. It had rod knock and a blown head gasket.

The saga continues!

After driving the car several times it became apparent that the transmission should be looked at and the torque converter was not going to cut it at all. The stall speed with the brakes depressed at full throttle was only 1600rpm, and with an engine that makes no real power under 2500rpm, it was way too slow of the line. So we pulled out the transmission and took it over to my friend's shop, he's a transmission mechanic.

Now on to the pics!

Ever wondered what was inside your XJS transmission?













This is NOT supposed to be a snap ring! It's a broken spring washer from inside the transmission. If we had let it go any longer, it could have completely broken in two and done some major damage. We caught this in time to avoid any problems. In addition to this issue, all of the rubber parts in the transmission were hard as a rock!





The part I'm holding on the right is a bushing that is supposed to be smooth inside, but you can see it was severely worn and had little chunks missing! Keep in mind, this transmission was otherwise very clean inside, and has only 80k miles! Makes me wonder about some people's transmissions that have a lot more miles on them!





In this pic it looks like we killed it and it's bleeding





Luckily, all the hard parts were in nice shape, and it just needed freshing up. My buddy did a complete rebuild, installed a shift kit, aftermarket governor springs and weights to make it shift at a higher rpm at full throttle, an adjustable vacuum modulator to dial in the light throttle shift points, and some other internal upgrades to make the transmission last longer and handle more horsepower. I was advised by several people not to put high performance clutch packs in it, so we went with Borg Warner clutches for the rebuild.

 

Here's the old monster-sized V12 Jag torque converter next to the new Munsinger 2800 stall 11" roller bearing torque converter.




Got the transmission back, all rebuilt, upgraded, and ready to install!

 

Transmission back in the car and ready to rock!

 

New woodgrain dash kit, and a passenger side chrome bezel on the way to me right now!

I think I decided on the wheels. TSW makes some Jag compatible wheels in 18". It looks as if this model comes in the offsets I will need, and it can clear the front XJS hubs. We are going to see if we can get a 245 tire on a 18x8 in the front, and a 18x9.5 on the back with a 265 or 275 tire. Here is the model wheel I think we have decided on, in chrome to give the Jag the bling is deserves.

 

why wont you send parts to the uk via us mail. i wanted items from you that cost $12 and weigh nothing but your quote was 40$ to send fedex.
beware uk jag owners

 

Very simple. We insure all shipments so if they are lost. If you lived down the street, it would be cheap to ship. Shipping is what it costs. Next you'll complain about the duties and tariffs. I don't charge those either.

What do you want me to do, not insure it? And, if it gets lost, I'm sure you won't want to pay for it? Correct? I take all the risk. No thank you.