Decision’s been made, and with a seat swap I’ll save nearly 150 pounds plus with some other changes will get the car to around 3400 which is massive, nearly 20% lighter than stock.

So who would be interested in the fronts and rears? I’ll likely post up in the classifieds just not certain where to start price....

 

Not sure, but I think if you went on Keto, you could get half way there.

 

I’m certain this was an attempt at humour but in reality I weigh so little as it is, there’s not much room for improvement there.

 

Glad you saw it the way it was intended,

 

Shorai batteries are popular with Lotus owners. https://shoraipower.com

 

Sorry if this is considered rude but what do you weigh Jah?
Appreciating that the US has only slightly a higher rate of obesity than we have here in the Uk.

I come in at 70kg/154lbs so just off Lewis Hamiltons racing weight.

I have wortec discs that come in at a 45lb saving over stock, I've provided proof on my wortec thread on a set of calibrated scales...albeit that was on old oems and new wortecs.

I have the supersports interior without ventilation and the cut-outs which saves 10kg/22.25lbs per seat.

No backbox that saves me a minimum of 35lbs, probably more!

So just on my car over a standard XKR I've saved a minimum of 125lbs straight away from not actually doing that much

Oh, please don't quote alloys which, according to the actual manufacturers website are a lot heavier, unless you have the weight shown on a set of scales to prove otherwise

PS: Some tyres weigh in at over 3lbs a corner less than others, so possible sommat you could look at?

 

Marky, I'm not certain what you're trying to prove. We've had this discussion previously and despite your attempts at an argument, once I provided empirical data you ceased responding.

I'm not here to prove anything, I've slowly and progressively made changes to this GT cruiser to make it best suited to the track rather than the street. I've weighed OEM parts to compare to the lighter weight aftermarket or custom parts for my purposes and the car's been on scales for balancing and such so I do know what's changed and where I'm going with this project.

The stock seats weight approx 75 pounds apiece according to my calibrated scale and the Sparco replacements are 12 pounds apiece including padding and covers. As I said in the other thread, I re-weighed my front alloys and they're 25 pounds apiece so nearly 15 pounds per corner saved not including what's saved on up-rated brakes, coil-overs, etc.

I weigh between 160-170 pounds, car's lost 200-300 pounds so far and confident another 200-300 pounds savings will be easily reached soon with seats, battery, fuel tank delete, glass and others.

 

Yes and Braille as well. F-Type owners have had success with small 30-40Ah motorcycle lithiums they just have to be kept charged.

 

Yes, that was the other brand that was escaping my memory. Between either of those and a CTEK you'll be fine.

 

I see you listed your custom seat Jahummer. Beautiful btw. Can you post pics of the replacement seats? Just curious to see them.

 

This can save some sanity, and aggravation. It works quite well...

 

Well, it's done. Will post up pics some time. Stock seats, front and rear and seat belts/hardware about 170 pounds, new Sparco seats with brackets/hardware less than 60 pounds total plus the recent LION conversion, about an additional 50 pounds saved. Few more major changes and it'll be under 3500 pounds.

 

I’m new here and readily accept my opinion with this group is meaningless but wtf? Your fixation on ruining a decent GT car by turning it into a rather poor track car is beyond my ability to comprehend. Especially as by your own admittance some of the stuff you’ve done has made the car less enjoyable on the street…
As previously suggested, why not get a Z06 if track duty is so high on your list? Mine is an ‘03, six piston front brakes, and dedicated wheel tire brake pads and seats for track use. An aftermarket oil cooler catch can hipo power steering pump harness bar and a few other things. Not a chance I’d remove anything from the hvac system and our track season is very mild compared to yours, AC is priceless while waiting for your run group to get the flag… I’ve done little to lighten it, corner balanced weight total is under 3300. Now I’m not a Vette person by any stretch but bang for the buck not much can beat the C5 Z. To each his own for sure, it’s obviously your car, hope you enjoy it!

 

What a waste of space you are ^^^

 

So many reasons why….

I’ve primarily short term leased every car I’ve had, including the 2008 Emerald Fire XK convertible, because I like cars so much, I like to change them up.

The XK was a fun GT but I rarely drove it, 3500 miles done when I turned it in, as it’s just too hot here. The XKR coupe however was much more fun, so much so, I ended up buying it and keeping it.

After the warranty was done and I’d crossed the 50K mile mark I decided to begin making small changes to make it more unique yet OEM such as replacing all the canvas Alston trim and plastic bits with Jet Alston, customizing the stitching on all the leather surfaces, replacing the wood with carbon fiber, updating certain parts to newer MY versions and much more. Then began upgrading the electrics for iPhone integration, OEM back up camera, RS exterior, wheels, Alcon brakes, failed bushings with Powerflex poly, upgrading the steering rack, changing the exhaust, and seeing what remapping the PCM would do etc.

Each change made the car that more fun and I decided to have a go at road course racing and I was hooked. Then came the desire to make it even more track worthy. (Years ago I auto crossed, but this is significantly more fun)

It’s not just the destination, which I’ve yet to reach, it’s the journey, the way points.

The X150 is unique and rare as a track car, and that’s a lot of what this is about. I had my fun with it as a GT and I was done. Surely I could’ve done something common and easy like a mustang or corvette or if I wanted a good track car, perhaps a Porsche. In fact I’ve grown to enjoy road racing enough, when I’ve more time, I do intend upon adding a couple more track cars to the collection.

I could say much more to explain my reasons but it doesn’t really matter.

EDIT: these cars are aging and certain repairs will exceed the value of the car. The AC for instance still works, but only because I keep recharging it. The evap has a leak and it’s over 4 grand to repair it, so what’s the point of keeping it when it finally quits?

 

serious but maybe dumb question: how about a handmade fiberglass hood? that's a fair amount of weight savings. you could disconnect the latching mechanism and use pins instead.

 

The hood is entirely aluminium and not that heavy. On the GT3 and trans am version they even retained the OEM hood and I think the lightest versions of these cars came in at about 2600 pounds. The weight's in things like glass, the front and rear steel A and K frames, the steel drive shaft and other bits and pieces. I’m at the point where removing any further parts, other than glass, is going to save only 5-10 pounds each time, so if I continue, I reckon another 100-200 pounds further could be shaved but it’s not really necessary. Some parts could be replaced with custom fabricated aluminium or carbon fiber, but not likely worth the cost or effort. Next I’m replacing the stock fuel tank with a fuel cell and that’s about it.

I'll have saved over 500 pounds in total and that will make a massive difference in the way it handles. After it’s done and corner balanced, we’ll have to see how balanced it is and make further changes as needed.

Other than the carbon wing, which looks the part, and canards, it’s retained the beautiful lines of the X150 on the outside.

 

That really wasn't necessary. We're supposed to be a friendly group here. You may not agree with the guy (I sort of do, myself), but come on...

Also, there does seem to be a bit more rudeness in here the past three days or so. I try to keep quiet but fail sometimes.

 

These aren't unicorns....while limited production, there's no right or wrong answer here.

 

jahummer thanks much for the time and thought to explain. I especially enjoyed your thinly veiled statement that Mustangs and Corvettes aren’t good track cars Fair amount of GT and Z06 owners wouldn’t be agreeing.
Anyway, you provided the info I was wondering about, hope I didn’t offend you…