Ha,ha I love it that sucker sure winds up in a hurry.
Thanks Jeff, I would love to see a little bit better video.

 

But it does prompt me to nudge you on brakes once again!

I was reflecting on your plan to up the rev limiter. DANGER WILL ROBINSON! There are a lot of different things that can happen when you do that and very few of them are good!
1. Valve stem stretch - can lead to valve clash or, worse, the piston catching up with the valve head - bad
2. Valve bounce - can lead to a dropped valve and ventilated pistons - badder
3. Con rod stretch - see above
4. Con rod snap - ventilated crank case - badderer
5. Piston running ahead of the flame front - loss of power - not too bad but ...

Fortunately most of the things that used to break on overrevving are things of the past these days (who remembers the days of the exploding distributor?).

Before you go changing the rev limit you need to do some serious research on why it's set where it is. Stiffer valve springs will certainly help with some of the top-end issues and we do have forged conrods that ought to be pretty strong but the fact still remains that Jaguar picked the number for a reason.

You've given us all so much pleasure living vicariously through your project. It would be a tragedy to hear it all end in tears (or worse - see comment on brakes).

Thank you for you openness and keep the good stories coming.

Nick

Oh and come to SoCal where we have some proper driving roads :-)

 

The roads are just fine here in Arizona.

I submit 191 (formerly US 666) as evidence. Around 1100 turns and 6000ft of elevation change in 120 miles.
Arizona 191 (Old 666) The Devil’s Highway

 

I love that twin-screw whine. But that car is super-dangerously quick. I hope you can stay safe, and I also hope those in the other vehicles around you can stay safe as well....

I expect that word about your car will eventually get around to the Tuscon police and they may decide to snare you. So be careful out there....

 

Love this thread. Quick question: Any reason all of your videos are in portrait vs. landscape? Seems like a panorama of the horizon would better translate
speed and acceleration. Not that I don't admire the back of your head.

 

Here are a couple of simple videos of the car taking off from different approaches.

86 degrees F, bald tires, no blue tops or LSD installed yet, but quite fun!

Shortie videos for quick viewing.

Have a great weekend!

 

OK - I'll buy that.

 

Makes one wonder how many people have taken an unexpected trip down the side of one of cliffs.

The name of the website IS excessive velocity.....

 

Thanks for the landscape vids. What a rush, what a sound!

Ed.

 

There are a few places along the route where you can see rusting hulks down in the valleys below so I'd guess it's happened a few times...

 

All I can say is WOW! Amazing piece of work Jeff and awesome videos! TY.

I can't wait to see your launches once the LSD and a new set of tires are on the car! Looking forward to hear your impressions after those additions. I'm with Avos, get the Michelin PSS, a bit more pricey but you'll want the extra grip with that much power.

I liked the Camaro run story, I had an X6 hanging on my bumper getting on the highway the other day. (X6 and BMW owners in general in this area think they're Gods) Once we got on the highway it was open so I went straight for the left lane as did he but he shrank in seconds and disappeared after a mile or so. So many, rather too many brand oriented car owners underestimate the Jags.

2 Quick questions, what made you decide to stick with the Water/Meth rather than switching to the Killer Chiller? and what ratio or type of mix (i.e. washer fluid or other) are you using?

Thanks Jeff... Fantastic THREAD!

 

If you are looking for a water meth kit I will give you a great deal on the one from my car. I can't be to far from you as I am just north of Boston.

 

You're welcome! =)

I already had the water/meth kit installed from prior to the AVos kit. They work pretty well. I like the Killer Chiller as well! Eventually, that is what I will probably go with, but I'm OK with what I've got for now. Baby steps...

One other consideration is that in Tucson, the summers get SO hot that I'm not positive that I want to give up some loss of cooling from my A/C system. We're talkin' FREAKIN' hot down here!

Since it rains about 5 days per year in Tucson, I decided to go with a tire that performs great in hot temperatures and dry pavement. No rain capability needed whatsoever! The tests that I read indicated the the Hankook Ventus V12 is excellent in those conditions. Affordability is good, too, but I went for the exclusive dry performance characteristics. Also, the Hankook front tires are being molded THIS WEEK. They arrive in about 2 weeks for installation. The rear tires are already at the tire shop and were molded about a month ago. Aaaaah, fresh tires.

Tire comparo: Tire Test: Nine Affordable Summer Tires Take On the Michelin PS2 Comparison Tests - Page 10 - Car and Driver

At $2.29 per bottle, lasting about 2 weeks of driving, it doesn't break the bank. I think that the methanol content is somewhere around 35%.


I'll take a picture of the actual rear tires that are going onto my car and post them in about an hour.

 

Jeff you dont give up cooling with a killer chiller. Its plumbed in the return after the evaporator

 

That's the kind of info I was hoping to hear. I would like to get it, just need to accomplish other things first. It's ALL fun!

 

These are the new rear tires that are waiting for the front ones to show up. I wish that they were on now! I'll be touching up some 'age chips' on the Perseus 20" wheels later in the week so that I don't have to do it after they're on the car.



MEATY!





Aw, yeah.



Who's your Daddy?

 

You do actually loose a little of the cooling efficiency of the a/c with the Killer Chiller. It is most noticeable at idle. I am already using the commercial refrigerant that Joe recommends.

 

do you have a removable plate on the back of the compressor? If so there is a mod to increase efficiency at idle. Or try a little less freon in system to see if you can drop low pressure/temp

 

Hi Jeff

I had those exact tires on my Perseus wheels before switching to the smaller OZ racing wheels. I think you will like them a lot. They have excellent grip - almost on a par with the Michelin PS2s that I had before, and give loads of feedback. At the limit they will start to chirp and then gently drift and it takes a fair bit more oomph to get them to break away. You, of course, have bucket loads more power (and, more important, torque) than me so will likely get the back end loose much sooner. The LSD will help for sure.

We don't have much more rain here than you do but I did get a chance to drive them in both light drizzle and serous cats'n'dogs. They behaved respectably in both conditions with no hint of aquaplaning. They do tend to tramline a little but then so do most steamroller-style tires! I will say that I was somewhat circumspect on the load pedal but managed not to get sideways despite my DSC being non-functional.

The other tire to consider for the future is the Bridgestone Potenza SO4 if they make it in your size. It's closer to the Michelins in price but truly spectacular.

$0.02

N

 

Several members expressed concerns that I needed to upgrade my brakes. These arrived today from SteveM. =) It appears that these monster brakes will be sufficient.

I will respray the calipers to be an obnoxious bright red. Sitting behind the silver Perseus wheels, mounted to a silver XKR, these things should visually 'ping'. Hah!