Search found 26 matches

by Marquis Rex
Fri Jul 19, 2019 4:12 pm
Forum: Technical
Topic: Gulf Classic 20-50 mineral oil
Replies: 5
Views: 989
United States of America

Re: Gulf Classic 20-50 mineral oil

From engine design and test experience, its not only Zinc Level but Phosphorus level you're interested in. An engine I designed recently (which has a valve train very similar to a modern Jag AJV8 (funny that!) but made in China, had problems- and the cams would wear from excessive idling. Idling is ...
by Marquis Rex
Wed Jul 17, 2019 1:18 pm
Forum: Technical
Topic: E type Roll Centre and Handling
Replies: 6
Views: 1084
United States of America

Re: E type Roll Centre and Handling

PeterCrespin wrote:
Tue Jul 16, 2019 11:36 pm
Thanks Rex. I deliberately chose to avoid the common use of IRS to upgrade the rear suspension. Am looking forward to a 1955-ish feel when sampling my creation next spring, with luck...
Sounds like an exciting authentic project
by Marquis Rex
Tue Jul 16, 2019 7:11 pm
Forum: Technical
Topic: E type Roll Centre and Handling
Replies: 6
Views: 1084
United States of America

Re: E type Roll Centre and Handling

Please call me Rex. By lowering the UCA inboard mount you would probably raise the roll centre by between 8-12mm (you're changing the UCA angle effectively). I don't envisage huge changes to handling by doing this. You've done the right thing by controlling the camber. Although roll centres DO effec...
by Marquis Rex
Tue Jul 16, 2019 6:29 pm
Forum: General
Topic: JDHT Certificate
Replies: 5
Views: 1298
United States of America

Re: JDHT Certificate

I never tried Mahwah HQ facility and didn't know it was an option.

The JDHT certificate wasn't cheap but Ive come to expect that from Jaguar
by Marquis Rex
Mon Jul 15, 2019 1:33 pm
Forum: Technical
Topic: E type Roll Centre and Handling
Replies: 6
Views: 1084
United States of America

Re: E type Roll Centre and Handling

Its not really complicated- you get pictures, like the one I posted, and take dimensions and angles. Im posting my diagrams of how I worked out the X308 Jaguar roll centres https://i.postimg.cc/L5btQ4Q7/X308-Front.jpg https://i.postimg.cc/RZfF2Cbt/X308-Rear.jpg The 280 mm number for the front of the...
by Marquis Rex
Sun Jul 14, 2019 7:38 pm
Forum: General
Topic: Anyone started to use their e-types yet?
Replies: 70
Views: 8577
United States of America

Re: Anyone started to use their e-types yet?

I got my brake master cylinder changed some weeks ago. Last weekend I took the E type out.
Image

Image
by Marquis Rex
Sun Jul 14, 2019 7:06 pm
Forum: Technical
Topic: E type Roll Centre and Handling
Replies: 6
Views: 1084
United States of America

E type Roll Centre and Handling

Greetings, I have been digging deep into vehicle dynamics in general and Roll centres in particular. My OEM background has had me deliver various vehicle projects where Ive had a good overview but Im now digging in technically deeper. The aim is to learn mainly. If I can benefit the community by sha...
by Marquis Rex
Sun Jul 14, 2019 6:40 pm
Forum: General
Topic: JDHT Certificate
Replies: 5
Views: 1298
United States of America

Re: JDHT Certificate

Hi Peter, The hard copy of the certificate is yet to come but I got a pdf copy from this email address jdhtarch@jaguarlandrover.com and this was a the bottom of the email: 'Collections Centre, British Motor Museum, Banbury Road, Gaydon CV35 0BJ Tel: +44 (0) 1926646385 e-mail: archive@jaguarheritge.c...
by Marquis Rex
Fri Jul 12, 2019 1:23 pm
Forum: General
Topic: JDHT Certificate
Replies: 5
Views: 1298
United States of America

JDHT Certificate

I bought my series 2 OTS last year and am loving it. It's exceeded my expectations. Nice riding, quite soft, nice feedback to the steering. Although numbers matching- I bought the car knowing its not totally original: The bonnet is from around a 67 (series 1.5) with the smaller grill opening and ind...
by Marquis Rex
Mon Jul 08, 2019 6:33 pm
Forum: Pub Chat
Topic: Accumilation Of Vehicles
Replies: 0
Views: 4089
United States of America

Accumilation Of Vehicles

I think most of us are familiar with the stereotype of more mature single women having many cats. They are often called 'Crazy Cat women' because they collect cats. Of this breed my ex wife was one (a woman not a cat!). I don't know if there's a similar term for mature gentlemen. If not, perhaps I c...
by Marquis Rex
Mon Jul 08, 2019 5:12 pm
Forum: Pub Chat
Topic: What did you do with your E Type today?
Replies: 8
Views: 2684
United States of America

Re: What did you do with your E Type today?

I did my brake master cylinder on my series 2 a few weeks ago.

I must say, it was a pleasure to work on compared to my new stuff.

The hardest part was bleeding the system- namely the rear farthest caliper. I let gravity do a lot of it.
by Marquis Rex
Tue Sep 11, 2018 8:40 pm
Forum: Series 2
Topic: Difference btw US and European spec’s
Replies: 5
Views: 1131
United States of America

Re: Difference btw US and European spec’s

I just bought a Series 2 OTS recently too. I'm from Europe originally. Have been contemplating what to change to Euro spec. I know my rear end is 3.54:1. It DOES feel ludicrously under geared. Not sure if it has an LSD. The torque is nice though. It runs about 20-21 mph/1000 rpm in 4th gear. I want ...
by Marquis Rex
Tue Sep 11, 2018 8:20 pm
Forum: Technical
Topic: 4.5 Litre rebuild
Replies: 36
Views: 3392
United States of America

Re: 4.5 Litre rebuild

Well Marquis, that sounds excellent. I would like a Challenger please 1971 would do. I hope you have a subscription to my heroes, David Freiburger, Mike Finnegan, Steve Dulcich, Tony De Angelo and Lucky. Motortrend is killing it at the moment and Engine Masters is superb. https://www.motortrendonde...
by Marquis Rex
Tue Sep 11, 2018 8:13 pm
Forum: Technical
Topic: Jaguar XK-6 DOHC port/cylinder head analysis
Replies: 15
Views: 2134
United States of America

Re: Jaguar XK-6 DOHC port/cylinder head analysis

This is fascinating. I always wonder what the improvements would be, if any, to have the combustion chambers aligned with the bores on the 4.2. What are the detrimental affects off the offset bores? Presumably the squish, mixture swirl and combustion characteristics are different from cylinder to c...
by Marquis Rex
Tue Sep 11, 2018 3:16 pm
Forum: Technical
Topic: 4.5 Litre rebuild
Replies: 36
Views: 3392
United States of America

Re: 4.5 Litre rebuild

Very cool thread. My take on the 4.7 is that I personally want the engine in a sports car to be 'revvy'. The XK with its super long stroke is heavily biased towards low speed. The intake valves are small for the cylinder size- to the point where the torque curve feels like a diesel almost. Compared ...
by Marquis Rex
Mon Sep 10, 2018 9:44 pm
Forum: Technical
Topic: Jaguar XK-6 DOHC port/cylinder head analysis
Replies: 15
Views: 2134
United States of America

Re: Jaguar XK-6 DOHC port/cylinder head analysis

Below was Uryk at Evolution E Types pet project I don’t know if anything came of it. http://imgur.com/co3VuFa.jpg http://imgur.com/V1yuOnS.jpg Simon WOW! That looks super impressive! I wonder if anything ever became of it. If it was possible to implement variable valve timing on the XK engine that ...
by Marquis Rex
Mon Sep 10, 2018 9:24 pm
Forum: Technical
Topic: Jaguar XK-6 DOHC port/cylinder head analysis
Replies: 15
Views: 2134
United States of America

Re: Jaguar XK-6 DOHC port/cylinder head analysis

I would reaaaly love to hear something about the Maserati C114 engine. It gave around 178 hp in 2.7 ltre shape, 180 to 190 in 3 ltre, and 220 in Merak SS and with huge valves (which usually broke). I can get measures - I never dyno‘ed my own car. Its base was a 3 ltre with broken pistons, so I had ...
by Marquis Rex
Mon Sep 10, 2018 7:48 pm
Forum: Technical
Topic: Jaguar XK-6 DOHC port/cylinder head analysis
Replies: 15
Views: 2134
United States of America

Re: Jaguar XK-6 DOHC port/cylinder head analysis

Here's an article on a twin plug XK motor. https://www.enginelabs.com/news/video-4-2l-jaguar-road-race-engine-makes-400-hp-on-dyno/ I'm somewhat skeptical of the 400 Bhp claim. They seem to claim it as 'net'. But first a little history lesson- the original E type was rated at 265 bhp 'Gross'-which m...
by Marquis Rex
Mon Sep 10, 2018 2:15 pm
Forum: Technical
Topic: Jaguar XK-6 DOHC port/cylinder head analysis
Replies: 15
Views: 2134
United States of America

Re: Jaguar XK-6 DOHC port/cylinder head analysis

I wouldn't raise the CR of a stock cyl head. You need to go Twin Plugs to reap the benefits of a higher Compression Ratio. A guy in Illinois did this recently. The Chevy LS7 cyl heads have the valve seat inserts pretty much touching- you have to be sure there's no porosity. So as long as they're not...
by Marquis Rex
Mon Sep 10, 2018 2:02 pm
Forum: Technical
Topic: Jaguar XK-6 DOHC port/cylinder head analysis
Replies: 15
Views: 2134
United States of America

Re: Jaguar XK-6 DOHC port/cylinder head analysis

I tried to post the images via my desk top and it wouldn't post the images regardless of size chosen. I ended up putting the whole lot on my iPhone and posting from there and now the images are super small.

If any admin can help- cheers!