Proper tune, plugs, intakes, pulley, exhaust and heat management for increased heat soak.

 

i really don't get caught on inflated power figures however cambo has run a 12.1 on street tyres . tune , x pipe and upper pulley no racing fuel nor is stripped down for weight reduction at the end of the day who knows how much bhp its putting out
​​​​​​but its unopened and not a huge amount of money needs to be spent to get those times

 

Any more pics\info on that build?

 

and that is where I surmised that 495 what a 'real' number for @2k...I trust cambo's info.
wj

 

I seem to recall that was a track special built by Rocketsports aka RSR.

But it was basically an XK shell with no factory functional electronics, which is the show-stopper for engine swaps in these cars.

 

Yep, 115.5mph trap on a street spec 4.2L XKR is ~500hp, which right in the ballpark for a stock 5.0L XKR which is 503hp / 510PS.

 

2007 XKR stock 4.2 supercharged 420hp.
Gutted cats with tune to compensate for back pressure, 10...ish. Self installed.
Tune, 70...ish, $950.00
Upper pulley, 15...ish $350.00. Self installed.
Oil catch can, 20...ish $200.00 Self installed.
$1,500.00, 535hp...ISH
12.565 with a 0.385 reaction time is my best so far with street tires, without catch can or upper pulley.
Yep slow off the line. Yep all advertised gains but this is what has been done so far.

 

You know this is going to be asked, are those numbers based on what pulley, exhaust, catch can, etc manufacturers say you will get when you bolt them on or did you do dyno runs for each mod to verify? Also you left off intakes. Since it’s an air pump, you’ve got to balance both input and output.

 

All advertised gains. Nothing verified with a dyno. Nor do I intend to. Nothing to prove other than I'm having fun.
Alpha Jag tune custom for my cats.
Catalytic converters were modified into mini cherry bombs with 2" perforated pipe welded in.
3lb pulley.
Catch can homemade concoction with the help of forum posts. Intake next. Maybe larger throttle body. Need cooling upgrade. Another set of rims for a pair of Mickey Thompsons. Spool up an LSD. Goal is to sneak into the 11's.

 

In lieu of dyno runs, before and after time slips? And 11’s should be easily doable and I believe it’s been done already.

 

I only have time slips from after tune and cat's. Nothing as stock as this was my first trip to the strip ever. Have not been back since pulley and catch can. I am 97 my son is the other in his 2020 M3.

 

Good 60ft so its getting out of the hole quite nicely and mph up 2-3 from stock .
​​​​​​

 

When it hooked it launched. Problem was when it didn't' hook it ROASTED the tires. The Goodyears were inconsistent.

 

Agreed,my stock 11 xkr has run 12.2@115 bone stock so that would equate to that 500-510hp..

 

I have done it in a 1963 Jaguar 3.8s and that aluminum block engine is ideal for a Jaguar. There is not going to be a kit but it can be done, here is a high end build but an LS would be the way to go https://www.facebook.com/watch/?v=10150592933417503

Clearly it can be done, here is one with a Ford 302, not my choice but it shows the space is there, https://www.grautogallery.com/vehicl...2-jaguar-xk120


Having done it in a classic I can tell you that a XKR or other V8 Jaguar is NOT the way to go unless money is no object. The reason is that it will be a tight fit and need customization and that is where the advantage of the LS V8's being one of the most popular V8's to use in many cars. That huge attraction creates a huge array of companies that make custom parts to make any swap easier from many different customizable ECU's, serpentine kits, shorty headers, engine mounts, etc. that would be a nightmare do duplicate if you went with a Jaguar V8. Plus the LS V8 will hands down put down way more power than a Jag V8, more reliable, lighter, and just so many accessories available.

 

Anything can be done with an infinite budget, though for the cost you might be able to afford a real super car! If a proper race car with the X150 shell is what you're after it can be done, but if retaining OEM functions and trim then the cost is going to be significant. For the same reason aftermarket upgrades are rare, there's no plug and play conversion kit for the X150.

 

That is why an LS V8 could be done at a reasonable price, not a cheap price but an achievable price. That X150 with that power will be much like my 4 door Jag, a super fast sleeper. All you need is to either have the skill or find a good shop that can do some custom fab work at a fair price and you could build an XK150 with a light weight LS3 that will put down 500-750 reliable street power. My 3.8s will do 0-60 in 4.0 seconds looks stock other than rims

and did not cost that much yet gets you so many thumbs up and appreciation that you just don't get with a new car...

 

Huh, and I have a non-LS Mustang that does 0-60 in 1.65 seconds. Course, mine looks like it can do that.

And just like everyone else has said...... Sure, LS your XK/R, it will be an empty shell of an XK/R with an LS. yay.

 

I'm actually thinking it would be fun to take a Chevy C8 and convert it to a Ford Coyote V8, which is a more modern design that breathes better.

 

You’re comparing pineapples to cabbages. The X150 can do better than 4 seconds with minimal modification. The issue’s the complex modern electrics which are integrated with everything. A Coyote or LS swap is not as simple as dropping it in with a few simple fitment modifications as you could with a vintage car, you’ve got the PCM and canbus to contend with.
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