Excellent! Long time V12 owner

Hi Bob, you are absolutely correct in your assumption that Jaguar knew that they had to raise the profile of the brand in general. Sir John Egan who was the managing director at that time that race on Sunday, sell on Monday. TWR was employed to do this and were very successful but did cut corners and did break some rules but it did raise the profile and sell more XJ's and XJS's.

Great to see you back Bob, You are my number 1 go to whilst I am doing the head gaskets and things on my XJS v12 convertible. All the best to you ,look forward to coming vids 👌😎👍

great content. wonderful v12 jaguar action

Really cool video Bob.

Wow I would have thought that there would be no other subject better to make video's out of than building a TWR motor in it's entirety. I can't think of anything that would improve your channel more than that series. Love your channel keep up the good work.

@thecampchaoschronicles9567

8 ай бұрын

Aside of the things mentioned there won't be much different than a standard rebuild which I've already done. II don't have the tiime to do the same thing again. But I will be sharing special interest items related to the TWR engine as I go along.

@jsquared1013

5 ай бұрын

@@thecampchaoschronicles9567 I for one am quite interested in the info/data on those exhaust manifolds. E.g. diameters and how close they managed to get the runner lengths to each other given the tight packaging restraints.

This is super cool Bob!!! Looking forward to more info on this engine over time. I Love these Pre HE V12s.

This will be an interesting series of videos

one note on the pistons-- that cracking/ ringland damage looks like classic Knock. Pre- detonation cracks the ringlands-- is there any pitting in the top of the pistons? or polished clean areas where the Alum got burned? How the old setup died isn't really you problem, but you don't wanna blow it up again after all that work. the old Distributors were crappy on the precsion of the spark timing.. and the antique Fuel injection could burn lean during certain events -- making a KABOOM.. Especially with elevated compression ratios

@thecampchaoschronicles9567

8 ай бұрын

All pistons do not show any sign of abnormal combustion

Hi Bob. Wow - this looks fascinating - I’d love to see how you get on reconditioning that engine and what you learn about it. I have an HE V12 and am wondering how I could get more power out of it - obviously bigger valves isn’t an option. I live in Kidlington UK and met a guy the other day who worked at TWR on the Group C cars - so I’ll be taking him down the pub soon to listen to his stories! Good luck with it all. Peter

@cosgraham534

8 ай бұрын

You will probably be very limited on how much extra power you can get out of the HE. I too have one and am focusing on ‘organic’ tuning e.g. increasing gas flow by reducing gas restrictions in and out of the engine and removing engine inertia e.g. removing mechanical fan / tensioner and belt.

@jsquared1013

5 ай бұрын

@@cosgraham534 it seems that shrouding of the exhaust valve and the inability/impracticality of enlarging the valves (e.g. no point to go 1mm diameter larger for flow if that 1mm just makes it closer to the shrouded wall; no point enlarging intake valve if the exhaust valve stays the same) is the big roadblock for the HE. I'm also going to work on stuff to "uncork" my HE, gradually over time after the "catch up maintenance" gets done, mainly because I see swapping the heads as a "major" job vs "minor" stuff like intake/exhaust/ignition/remap and the like. Besides, I've got an E36 M3 rebuild to finish and I want to get my old Nissan 240SX back to streetable running condition before I even think about the Jag's engine coming out 😂 so my project to-do list is somewhat spoken for over the next year or two.

Hey Bob, there should be a TWR number stamped on the block at the back of the V. Intersting that this is a 6.1L. The number should start with TWR61Lxxx + the actual Jag engine number. The heads should also have TWR extra numbers on them. I know Bill W. on the forums will be interested. The last DAC3062 on the build sheets I have was created in 1986 so that's weird (the first 14 of them or so had that ECU PN) and the ECU may be modified with a "digital chip" whatever that means.

@cosgraham534

8 ай бұрын

Where have you heard about a digital chip upgrade - sounds intriguing?

@thecampchaoschronicles9567

8 ай бұрын

According to the info provided the 16CU unit is fully programmable. Probably talking about their upgraded unit. @@cosgraham534

@andrewpliagas9213

8 ай бұрын

Interestingly this engine's TWR serial number doesn't quite follow the template you specified. The original dyno charts from TWR in 1985 (this engine was built a good 6-12 months before the MY87 car for which it was destined) specify an engine number beginning 61Lx as you said but with no TWR prefix or Jaguar suffix. When we first examined the engine, we found that 61Lx serial number stamped in the valley of the block and the original Jaguar engine number preserved at the back of the V.

@ferrariguy8278

8 ай бұрын

Maybe the TWR prefix is just in the original engine build chart (along with the ECU pared with the build and if any chip changes had been done to the ECU) that I DMd to Robert though I HAVE seen TWR as part of the part number stamped in other circumstances. IDK @@andrewpliagas9213

@andrewpliagas9213

8 ай бұрын

​@@ferrariguy8278No worries, I only wanted to let you know what I found on this engine for comparison's sake. I don't quite know where these detail changes fit on the TWR/JaguarSport timeline.

Maybe the intake manifold runners are slightly bigger inside take a look, Also the TWR piston has shallow dish Compared to other piston compression maybe 11.5 to one That and the bigger intake valve With like you said cam center line Starts to add up but I think 350 hp Is possible with all parts I see Please check the cams again Great video Bob.

@ferrariguy8278

8 ай бұрын

I wonder if the engine could be served better with some GroupA manifolds, but those would require an ECU re-tune which is... problematic these days.

@billstewartxxx

8 ай бұрын

@@ferrariguy8278 or a new ECU shoved inside the old ecu case...

Bowl pistons, flat heads, cold start injectors. Interesting. Looks all old school. Point of contention, the group A cars also had this setup. Some of their conpetitors did not like this as they were no longer production model heads at the time of TWR’s campaign

@thecampchaoschronicles9567

8 ай бұрын

There's a ton of stuff TW did the competitors hated. But apparently he could be very persuasive with the people who made and enforced the rule book.

@ferrariguy8278

8 ай бұрын

I suspect that they just re-added a thermo-time switch to control the cold start injectors, and that may have been easier than trying to add in some cold startup idle routines in the 6CU.@@thecampchaoschronicles9567

@jsquared1013

5 ай бұрын

@@thecampchaoschronicles9567 that second sentence sounds like the modus operandi of a certain famous Italian car company founder.

also, can you measure the hole size in the intake manifold where the throttle body attaches? is it 72MM? Legend has it that the hole and the throttle bodies were made larger. don't know if that is a old wives tale or true...

G'day Bob... here's a short video I'm sure you and your subscribers will love. Back in 1986 Tom Walkinshaw bought three of his TWR XJS Jags to the Mount Panorama circuit in Bathurst Australia for the annual 1000km (600 mile) race. The video is of his final qualifying lap including in car video. kzread.info/dash/bejne/f219mamQnM-2drw.html

I wonder if they are new castings on the heads or dug up old castings. Kinda weird to stick a older design that prob have been out of production for 8 years on a new for then 1988 engine. It wouldnt surprise me but i mean, its supposed to be a brand new car also.

@thecampchaoschronicles9567

8 ай бұрын

I don't see where Jaguar would have gone to the expense of making new flat heads. The fact this engine has an early front cover leads me to believe anything they could use off the shelf got used.

@ferrariguy8278

8 ай бұрын

Well Group 44 was able to continue racing by getting Jaguar to *claim* that the "flatheads* were still an "option" long into the HE only production. Of course the G44 heads were VERY special castings, as were the TWR race heads.@@thecampchaoschronicles9567

that has the full flow oil cooler setup, not the usual jag setup-- you can tell by the casting that attaches to the oil pump intiake...it does not have the double intake {from the sump and from the cooler}. The pump sucks oil only from the sump. i don't see the pipes that run from the oil filter to the cooler in your video. are they missing? Friggin KZread will not let me post a pic of the 2 pipes that run off the oil filter-- to and from the cooler... i will send a pic via email.. Also, measure the Con Rod, because the 1995 6.0L has a piston that moves the wrist pin hole up towards the head and keeps the same Con Rod. That looks like what they did on this engine, but its hard to eyeball that stuff over the video...

@ferrariguy8278

8 ай бұрын

Yep. AFAIK the conrods on all variants are interchangeable and basically exactly the same. Only the wrist pin position in the piston moved.

@thecampchaoschronicles9567

8 ай бұрын

The rods appear to be identical to standard. The pistons are pre-HE cut down to deck height. The piston pin location is higher. There is only one pipe coming off of the oil filter casting. Everything in the block looks like standard HE except for the crank and pistons. And I sais in the video the engine "kit" was sent over and the engine converted at a dealer. The TWR conversion kit included a complete engine, speedline wheels, etc.

@billstewartxxx

8 ай бұрын

@@thecampchaoschronicles9567 only one pipe on the oil filter casing? thats cwazy! where does the oil go once it leaves the oil cooler? there is no where for it to return to the pump intake... ? I am CornFuzed...

@thecampchaoschronicles9567

8 ай бұрын

All. evidence so far is the lube system is standard HE.@@billstewartxxx

@billstewartxxx

8 ай бұрын

@@thecampchaoschronicles9567 okay. makes sense.

Make the parts to convert my 5.3!