The 'E' Type Forum

Clive will have the info...its a very long rambling thread but worth you looking... I have eagerly studied the entire thread, Clive and I are comparing notes enthusiastically. It turns out we have a similar history and career paths, so we talk the same language. Clive didn't bother measuring the th...

angelw wrote: ↑

Thu Mar 20, 2025 1:54 pm

The difference in the Track of an S3 car is all in the Control Arms and Half Shafts.

Is there any data on the fronts? My casual waving of a tape measure suggested "about an inch" was in the arms, but I wasn't very definitive. Hence I was looking for equivalent drawings for the front, too.

Request received

Copy that, as the Americans say.

It would be interesting to have your views on why this decrease of 54% in the spring rate might have been introduced. Dampers were changed at the same point but there was no change to the rear springs or ARB (unlike S1/2, fitted to front only on S3) Obviously I can't be definitive, but such changes...

Do not take dimensions in the service manual as "gospel"...copied from another post on the forum in a quick search "The dimensions listed for the Rear Wishbone is another obvious error; the dimensions are for an XJS Wishbone, not an S3 E Type." Great to know! It does explain a lot! Right now I am s...

I'm looking at the manuals and seeing some great diagrams in the 3.8/4.2 version: https://i.postimg.cc/VN8yQHwG/Screenshot-2025-03-20-093319.png https://i.postimg.cc/DwFVRMnC/Screenshot-2025-03-20-093435.png https://i.postimg.cc/43NDxHKV/Screenshot-2025-03-20-093448.png However, try as I might, I ca...

All the SNGB bars are aftermarket what do you mean when you say "standard"....I mentioned original dimension above depending on chassis number By "standard" I mean the ones that match the dimensions fitted as normal while the vehicle was being built. I don't care who the supplier is or was (I might...

Hi Damian, Prior to introduction of the larger diameter (0.780-0.784") torsion bars referred to above, production bars were rated at 100lb/in. The wishbone rubbers contributing a further 16lb/in. (info from Jaguar documents dated 1962). Bob My copy of "Strictly No Admittance" has just been delivere...

Bob. wrote: ↑

Fri Mar 14, 2025 6:41 pm

Facsimiles of the documents are in Peter Wilson's book "Strictly No Admittance". Probably be breaking some rules to post copies here.

It should arrive some time next week for me. Thanks for the pointer.

Prior to introduction of the larger diameter (0.780-0.784") torsion bars referred to above, production bars were rated at 100lb/in. The wishbone rubbers contributing a further 16lb/in. (info from Jaguar documents dated 1962). Bob, thanks for that information. My estimates got me to 117 lb/inch as a...

Sixty plus years ago the design of steering and suspension was way different to modern methods as I’m sure you’ll know and appreciate. It's not so different to today. Springs are springs, humans are humans, welding is welding. The biggest difference is that the early prototypes are all in the compu...

SNGB sell 3 different ratings of torsion bar for the S1. 0.765, 0.860 and 0.835. Presumably 0.765 is standard and the other 2 are uprated 🤔 I've seen these. It wasn't completely clear to me which were standard and which were uprated, but I will go with the 0.765 as standard since it's usefully clos...

I'm an avid student of history and I appreciate the pointer.

Thanks for confirming the length difference. What were the standard diameters of bar on the earlier cars? I've already spotted the difference in motion ratio between the narrower and wider track cars, but it's really just the diameters I am trying to home in on. I can calculate motion ratio with the...

That thread confirms 0.75" / 19 mm for an S3 car and confirms other bars are available, but not really any new information. This post suggests they are different lengths, with the S3 bars being longer: Just for the record, S3 torsion bars are over 4.5" longer than those fitted to S1/S2 although I be...

OK, maybe not *that* torsion bar question. I'm trying to understand the library of available torsion bars. I have as a datum point that Series 3 torsion bars as standard settled on 0.75" / 19 mm. After that it all becomes a bit hazy. I understand that S1/S2 cars had larger diameter bars, but I see a...

O Learned Denizens, I'd like to pick your brains from time to time. I don't have an E-Type, but (like many) I am fascinated by them. As well as the aesthetic, my fascination becomes somewhat technical, too. I am what some people call a "chassis" engineer, what some people call a "vehicle dynamics" e...