Search found 134 matches

by lowact
Fri May 31, 2019 3:08 pm
Forum: Series 3
Topic: ECU on EFI cars
Replies: 21
Views: 1360
Australia

Re: ECU on EFI cars

Not ignoring Roger, far from it. My 16CU ECU is UK version, DAC4119, does not have Lambda feedback. For Lambda (exhaust gas oxygen sensing) I would have needed the US version, DAC4118. According to Roger the maps in these versions are different. Copy of Rogers advice here: https://1drv.ms/b/s!AiSPBK...
by lowact
Wed May 22, 2019 1:12 pm
Forum: Series 3
Topic: ECU on EFI cars
Replies: 21
Views: 1360
Australia

Re: ECU on EFI cars

Hello Michel. Exactly the same as you, I intended to use the Lucas 16CU ECU from my donor engine. After discussing with Roger Bywater I concluded that 80's tech was just too old, too primitive. I checked out the Emerald K6, also the latest Megasquirts, imo these also a bit dated. Instead I will be u...
by lowact
Fri Mar 01, 2019 11:21 pm
Forum: Series 3
Topic: Capacity and compression ratio increase
Replies: 20
Views: 1177
Australia

Re: Capacity and compression ratio increase

G'day Phil, thx for info re exhausts. Not choosing, doing both. I've an LdN overdrive ready to bolt on. Also thinking of changing the diff ratio, currently 3.54, to either 3.31 or 3.07, the latter would maybe make the OD too long? Do u still have the 3.31 that u swapped out? U bagged it mercillesly ...
by lowact
Fri Mar 01, 2019 8:00 am
Forum: Series 3
Topic: Capacity and compression ratio increase
Replies: 20
Views: 1177
Australia

Re: Capacity and compression ratio increase

I've no experience of the Rob Beer large diameter pistons, I've read that large dia, short stroke revs better but makes head dissipation less efficient. Perhaps if u want to be radical y'd fit the RB pistons to a long-stroke (6L) engine? Instead I am preparing to upgrade to efi 5.3 HE 12.5:1 compres...
by lowact
Mon Feb 25, 2019 11:14 am
Forum: Series 3
Topic: SNG Ignition System problems
Replies: 6
Views: 441
Australia

Re: SNG Ignition System problems

These may be helpful? Kirby Palm's tome (pages 153-157) includes owner experiences and troubleshooting tips for CEI/AB14 ignition system which is what the SNG system is? https://1drv.ms/b/s!AiSPBKa26IcchJgyI0COwjxZnCBnmQ Also, here is Jaguars tests to check this ignition amplifier: https://1drv.ms/b...
by lowact
Fri Feb 22, 2019 11:52 am
Forum: Series 3
Topic: Ballast Resistor
Replies: 4
Views: 380
Australia

Re: Ballast Resistor

G'day Adrian! Short answer, Imo: Not a worthwhile investment, very rare for ballast resistor to ever be faulty, definitely aim to replace an Opus distributor. Long answer: 1. Do you have a workshop manual? If not, here is one: https://1drv.ms/b/s!AiSPBKa26IcchJoGD2wp_dEgALSoQA 2. Do you have a multi...
by lowact
Fri Feb 15, 2019 10:56 pm
Forum: Series 3
Topic: replacement coil for SNG Re-Opus ignition
Replies: 4
Views: 437
Australia

Re: replacement coil for SNG Re-Opus ignition

I should retract that comment as i don't know enough about the sng conversion. Has ballast resistor but unlike Opus doesn't need it? So is it just fake for looks? If it DOES need it then maybe the special low resistance coil needed also ....
by lowact
Fri Feb 15, 2019 12:49 pm
Forum: Series 3
Topic: replacement coil for SNG Re-Opus ignition
Replies: 4
Views: 437
Australia

Re: replacement coil for SNG Re-Opus ignition

My understanding, the SNG ignition is not Re-Opus, it is a Jaguar CEI ignition system shoe-horned into Opus amplifier casing and distributor body? That the distributor to use with CEI ignition is part # DAC6093?
by lowact
Fri Feb 15, 2019 12:38 pm
Forum: Series 3
Topic: Loose valve tappet guide or?
Replies: 19
Views: 1227
Australia

Re: Loose valve tappet guide or?

Thx I was assuming based on the "loose valve guides" cause of the matching symptoms in my "how to read a vacuum gauge" guide. So now I suspect either valves loose in their guides or failed valve stem seals, the latter is logical, everything else plastic or rubber has had to be renewed, valve stem se...
by lowact
Wed Feb 13, 2019 2:32 am
Forum: Series 3
Topic: Loose valve tappet guide or?
Replies: 19
Views: 1227
Australia

Re: Loose valve tappet guide or?

Thanks Marek, I also noted you've removed the timing cover with the heads on, I read (Kirby Palm) that this is possible by destroying the studs connecting the head to the timing cover … so I am looking down from the top. I appear to have comfortable gap between the chain and the bolts that attach th...
by lowact
Tue Feb 12, 2019 12:26 pm
Forum: Series 3
Topic: Help! Torsion Bar Quandry
Replies: 11
Views: 870
Australia

Re: Help! Torsion Bar Quandry

There are different number of teeth on the front spline and on the back spline. This enables you to make fraction-of-a-spline adjustments. E.g. Front CW 3 and rear ACW 2 is different to Front CW 2 and rear ACW 1. There are different instructions for earlier and later cars. Cars earlier than 1S70413 ...
by lowact
Tue Feb 12, 2019 11:15 am
Forum: Series 3
Topic: Loose valve tappet guide or?
Replies: 19
Views: 1227
Australia

Re: Loose valve tappet guide or?

Thanks gents, I hadn't thought of thick petrol, seems likely when u look at it closely. And yes Peter, yr wager would be safe, apologies. Timing covers, valve guides, tappet clearances. Current status of of the open-heart surgery: https://i.postimg.cc/ZKmMddSf/20190212-205602.jpg Bad news, everythin...
by lowact
Tue Feb 12, 2019 1:54 am
Forum: Series 3
Topic: ohms
Replies: 4
Views: 373
Australia

Re: ohms

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by lowact
Sun Feb 10, 2019 2:24 pm
Forum: Series 3
Topic: Petrol tank sump removal
Replies: 6
Views: 541
Australia

Re: Petrol tank sump removal

Image
by lowact
Sun Feb 10, 2019 1:49 pm
Forum: Series 3
Topic: Loose valve tappet guide or?
Replies: 19
Views: 1227
Australia

Re: Loose valve tappet guide or?

Also seems to be a bit sooty in the inlet manifolds, is there a clever procedure for checking valve timing with just the timing covers removed?
by lowact
Sun Feb 10, 2019 8:59 am
Forum: Series 3
Topic: Loose valve tappet guide or?
Replies: 19
Views: 1227
Australia

Re: Loose valve tappet guide or?

If it's timing chain, to fix would require complete strip-down heads off, sump off ? Meanwhile I wonder, why might I have oil in the bottom of my inlets?
Image
by lowact
Sun Feb 10, 2019 6:12 am
Forum: Series 3
Topic: Loose valve tappet guide or?
Replies: 19
Views: 1227
Australia

Re: Loose valve tappet guide or?

Down to Gippsland. Is a regular trip. Car is (has been) well and truly on the road, I've been talking about taking it off the road for years. 2019 is looking likely. Here is another vid, shows what happens when I remove vacuum. I've titled it "why I hate carbs". https://1drv.ms/v/s!AiSPBKa26IcchMMjK...
by lowact
Sun Feb 10, 2019 5:07 am
Forum: Series 3
Topic: Loose valve tappet guide or?
Replies: 19
Views: 1227
Australia

Loose valve tappet guide or?

Um, pls can I have prognosis? Intended to head off tomorrow on a 1500 km round trip. But the clatter that I had always attributed to a loose tappet guide, which would go away after a while, doesn't go away anymore. And now its got worse and I seem to have lost most of my vacuum. The attached are lit...
by lowact
Thu Jan 17, 2019 5:35 am
Forum: Series 3
Topic: 4 speed manual to OD conversion
Replies: 15
Views: 1098
Australia

Re: 4 speed manual to OD conversion

Hello Phil. The performance curves I posted are not my cars, not even real, they are copied from automobile-catalog, this uses car dynamics simulation software i.e https://www.automobile-catalog.com/simulation.php
by lowact
Tue Jan 15, 2019 9:44 pm
Forum: Series 3
Topic: 4 speed manual to OD conversion
Replies: 15
Views: 1098
Australia

Re: 4 speed manual to OD conversion

Hello Peter. Can you tell us what the “competition upgrade” comprises, specifically what is different to the OD that was fitted to Jaguar 4.2L XJ6’s? Do you know spring rates and materials?