I've done most of the tried and tested bolt ons for our engine and would recommend the following: 1.7lb pulley (not 2.5lb as it overspins the SC and reduces efficiency), Caldoofy intake tube and K&N filter, high flow cats and an ecu tune. This will give you very close to 450bhp at the crank. In my opinion porting the the supercharger on our cars is pointless and will only increase noise as the Gen IV Eaton does not leave any benefit for porting. As a reference, most stock STRs/XJRs make about 320rwhp and with the above bolt ons you can see approx 360rwhp as shown by some dyno threads on this site.

 

Ok so who does an ECU tune on a pre 2006 Jaguar XJR?

 

You can never have enough power can you!? I estimate my STR was around 430bhp with the previous mods and it was loads of fun, although I got to the point where it didn't feel that fast anymore. I agree that Avos was spot on in identifying the Achilles heel of our cars, the dreaded 'heaton' and thankfully developed a kit for the vastly more efficient TS conversion. In my opinion Jaguar were too slow in moving to the TVS systems on the 5.0s. If you look at Avos' TS thread, a X350 XJR makes around 470rwhp using only a 3.25" pulley which is more power than a 5.0 XJR, whilst using a more conservative pulley ratio. With meth injection and a smaller pulley, I'd imagine upwards of 600rwhp would be possible using Avos' kit. The 2.6KB itself is good for 950+bhp.

 

Speak with our forum moderator Cambo, he has the means to provide us with custom tunes tweaked by his tuner in Russia and then flash them to our ECUs using IDS. He's currently testing a revised tune with more aggressive spark advance and top speed and torque limiters removed for my TS STR. I'm planning to do a baseline dyno in two weeks, then hopefully install the tune provided it is ready, then go back and test power again. I will share the results if you are interested in the results before going for it. Your cooling upgrades intrigue me, do you have any pictures of your additional radiator set up?

 

That sounds very interesting!

The additional radiator is in series with the original IC radiator and I have added an upgraded IC pump.

The two 6" fans are run off an adjustable thermostat mounted in the main radiator and come on when the temp in the main radiator goes a bit higher than when the engine is running at idle.

 

That's a tidy I/c set up there .
Sadly that will not fit in the S type . Although I wonder functional as it may be does it restrict any air flow to the rest of the radiator pack when the fans are not running ? As the fans alone look to close off a sizeable area .

I've just done the the I/c pump upgrade ,
And am in the process of getting a 4liter alloy tank fabricated for extra I/c coolant capacity to fit under the left front undergaurd , just below the air box .
There is a nice square empty space , So I'm making use of it should help at least .

 

TS STR "Wiked" !! Yours is going to be one filthy fast sedan .
Defiantly keep us up dated . Thanks. I'm looking in to
Cambo's tune also . I Look forward to some updates cheers .

 

My setup does "block" air flow to the top half of the main radiator setup which is the main reason for the additional fans.
There is quite a space for incoming air below the tag plate which btw I have added a metal mesh to help protect. Thats a stray tie you see!

When all 3 fans are running the airflow is pretty amazing to feel.

I thought about the setup you describe as I see a number of people go that route. I decided I wanted extra coolant volume as well as extra cooling and was able to fit the extra radiator with some finagling.

 

The tune will probably give you 10-15rwhp from the extra ignition advance so worth doing considering how rich the stock tune is. Nice set up you have there, I was looking at getting a custom radiator made with a larger surface area but we're limited by space on the STR. Think I'll start off with the IC pump and pusher fans, then perhaps meth injection for the cooling and octane increase.

 

Very good thinking! The extra coolant capacity will definitely give us a nice buffer against heat soak when driving hard. I've been looking at buying an alloy coolant tank off eBay to add to my coolant circuit but hadn't thought about where I could add it other than the boot. If you post some pics of your set up once it's done it would definitely give me some ideas.

 

I hope so, from what I know there's only a handful of TS STRs so is quite a rare beast, especially as Avos has stopped making his kits for now. I'll definitely keep you updated when I get dyno numbers. Also, I think you were seriously overestimating the cost of a TS. It's no way near half the cost of a GTR. Sure Avos' 2.6 kit isn't cheap, but there are other blower options; e.g. a 2.1 KB which you could retrofit with a few custom parts using the stock inlet. Avos' first conversion on a STR was actually with this blower and using a tame pulley ratio, it made easily over 530bhp. If you're interested in such a project there's a good condition 2.1KB on eBay now for around 2000 USD. It's easily the best power modification you could do in these cars.

 

dude i got a quote from avos about a year ago . and its great value for HP don't get me wrong . i have the quote in front of me this includes the injectors and max bored TB , and with shipping and the dollar to euro exchange blew me out of the water. i won't chuck avos's TS no#'s out there . but to give you an idea , an immaculate R32 here is plenty full the market is flooded and goes for $18-27k nzd . i just looked at one with a forged rb30 with 550whp & 90000km for $20k it said can be turned up !
and a mint one with 80000km & rb26dett mild tune at 400whp.for $23k.
my neighbor bought his R32 rb26det 90000km with 750hp built for 850hp for $20k nzd.
my STR is valued at between $16-18k nzd so i wouldn't have to pump much extra in to be in a GTR with substantial and/or excessive power .
a full on silvia s15 drift car here with 800hp is so common its a joke . and they only fetch $15-20k . horse power is cheep but not with the STR!
but like i said i love the comfort and tech of the jag ! so ill stick with it .
but sadly just with the heaton . i should have bought avos's kit minus the blower , when i found out he was only going to produce them for about another year back then . as the blower is over half the price of the kit . and also a lot of the freight price . and then looked out for a blower later . i hope he does another run in the future . as i may still be persuaded to go that way .
as the rarity of the STR is a big reason i bought one , and a TS STR just intrigues me . i will have dimensions and diagrams for the I/C tank and photos soon . could even make two if you want . it will bolt in with no extra holes drilled in the car , as that just bites me to do atrocities to a good car shell.

 

it wasn't my idea i stole it from avos in an old-old thread . the guy is a modest genius !

 

[QUOTE=JagSTR2004;1529983]I've done most of the tried and tested bolt ons for our engine and would recommend the following: 1.7lb pulley (not 2.5lb as it overspins the SC and reduces efficiency), Caldoofy intake tube and K&N filter, high flow cats and an ecu tune. This will give you very close to 450bhp at the crank. ///// This looks like the best possible way to do it...If you install the aftermarket cats, not to expensive either...What about the front cats as far as restriction? Has anyone just gutted the rear cats or would that throw a code?

 

I have a Passport G Timer which I presume is similar to some apps you can run on smart phones.

Last year the best I could get 0-60 on a slightly uphill road was 6.03 seconds.

Just now on two runs I got 5.75 each run on the same road as last year.
Also achieved a little wheel spin for the 1st time. I had S mode on and anti skid off same as last year.

Same 1/4 tank of Shell V power 93.

Very similar weather conditions ambient temp about 72 with low humidity.

About the same load in the car. Only difference is the fact that I cleaned the charge coolers as well as elbow, throttle body etc. Oh and the stage 1 intake that I made. Flap inside air box removed.

I will do the same runs when I eventually get my other SC rebuilt and installed. I will rebuild it this weekend but installing it will have to wait a while.

 

I wouldn't trust that App as far as I could throw it! This is from the 0 to 60 times website which usually reference Motor Trend, Road&Track, and Car And Driver results for yours here:
2005 Jaguar XJR 4.70 sec 0/60 13.10 1/4

 

Link: Jaguar 0-60 Times 0-60 Times

 

I have read all the published 0-60 times. Some at least are based on UK testing where higher octane fuel is available.

I also understand that the US Jaguar models are actually de-tuned as compared to UK models.

The point about using the Escort device is one of relativity as opposed to absolute value. I doubt the absolute value accuracy.

 

My mistake, I didn't realise you were speaking about the R32 (they're my favourite of all GTRs) and assumed you were talking about the R35 which over in the UK sell for £40k plus for the older models. High performance Japanese cars are obviously much more expensive in the UK compared to NZ due to the extra cost of shipping and a clean stock R32 GTR or MK4 Supra TT with around 320bhp would cost a good £5-6k more than a nice STR today. You could easily buy and fit a TS for that and have a car with over double the power of the GTR for the same price; whilst still having the luxury, comfort and practicality of a Jaguar saloon. Plus, there's thousands of big power GTRs but as far as I know literally only a handful of TS STRs in the world (I know of 4 STRs including mine although there's undoubtedly a couple more) which just elevates its sleeper status even higher

I'd definitely be interested in a bolt-in additional intercooler tank, post some pics up when you can. I know exactly what you mean about drilling holes!

 

Regarding the tune for the STR & XJR, it's not been tested yet so until it has I can't really say too much more about it.

I've been away for work for most of the past 2 months so it's not been possible to get it in the car. Hopefully in the next couple of weeks I'll be able to do something with it.