Search found 516 matches

by jagwit
Tue Mar 10, 2020 11:31 am
Forum: Series 3
Topic: V12 Getrag 265 bellhousing
Replies: 23
Views: 1964
South Africa

Re: V12 Getrag 265 bellhousing

I fitted a TKO500 kit I purchased in 2004 to my '80 XJS which has the 10:1 Pre-HE engine (same bolt pattern as e-type I believe). It came with a purpose made bell housing, Fidanza lightweight flywheel etc. I'm not sure I can recommend the TKO500 transmission, it whines in 1, 2nd and 3rd and the thro...
by jagwit
Thu Feb 13, 2020 3:06 pm
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

Again pardon my ignorance but doesn't this waste a lot of fuel? And if it cant fire the injectors individually wouldn't it be better to have a single throttle body injector per manifold? The "wastage" in fuel is of academic proportions. "All" fuel supplied goes through the engine and is combusted. ...
by jagwit
Thu Feb 13, 2020 8:36 am
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

Clear as mud? :bigrin: For more technical information: http://www.megamanual.com/v22manual/minj.htm#pwm So how does one output control 6 individual injectors connected in parallel? Surely this just opens all 6 each time it fires? Correct. You can then choose to fire the banks alternating between be...
by jagwit
Wed Feb 12, 2020 3:11 pm
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

Megasquirt and its atrocious documentation will do that to you. Perhaps you mean "comprehensive" rather? I believe the MS documentation is astonishing! Amazingly comprehensive. But I concede that many "squirters" find it hard to find the info they are looking for because there is SO MUCH INFO on th...
by jagwit
Tue Feb 11, 2020 8:11 am
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

abowie wrote:
Tue Feb 11, 2020 7:50 am
My brain hurts...

Welcome to EFI....

EFI wil make your brain hurt if you attempt it yourself.

Some ECUs will just make it hurt more than others.

It is a fantastic learning experience though - if you are willing /keen to learn. Having excellent documentation and support is a prerequisite.
by jagwit
Mon Feb 10, 2020 5:39 am
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

How does the MS2 handle 12 injectors? I will presume your question to be: "How does the MS2 handle 12 LOW IMPEDANCE injectors?" The short answer is: Comfortably. The medium answer is: 6 injectors per each of the two injector outputs using PWM and active flyback control to minimise current drawn by ...
by jagwit
Sun Feb 09, 2020 8:31 am
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

With my 12.5:1 CR engine, I want to try closed loop (knock sensor) and adaptive control of sequential ignition timing. I have reservations about this idea. This approach simply aims to chase the maximum advance whilst limiting detonation. This is based on the assumption that max EFFICIENCY is alway...
by jagwit
Mon Feb 03, 2020 6:36 am
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

The main consideration you should consider with such an upgrade is the ability to datalog results. kind regards Marek Marek has touched on an extremely important matter. The importance of data logging should not be underestimated. Along with that, excellent documentation and tech support goes witho...
by jagwit
Sun Feb 02, 2020 10:11 am
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

I used a Megasquirt-2 (daughter board) on a megasquirt v3 motherboard built for low impedance injectors (std HE jag v12 Injectors). This is one of the "beauty" aspects of MS-2: Its ability to elegantly/efficiently drive low impedance injectors. The on board Manifold Pressure (MAP) sensor determines ...
by jagwit
Sun Feb 02, 2020 7:47 am
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

I have fuel injected 3 Jag V12 engines(and numerous v8s) using Megasquirt-2. In all 3 cases I implemented ECU controlled ignition timing - which, IMO is the biggest "win" on any carburetted engine - bigger than fuel injection. This last statement was again proven when I implemented a Bluetooth 123Ig...
by jagwit
Sat Feb 01, 2020 7:39 pm
Forum: Series 3
Topic: Fuel injection on the V12 engine
Replies: 46
Views: 5681
South Africa

Re: Fuel injection on the V12 engine

lowact wrote:
Sat Feb 01, 2020 12:33 am

Injectors are the originals, Bosch 0280150164.
Are you using current limit resistors?
by jagwit
Sun Jan 12, 2020 4:15 pm
Forum: Series 2
Topic: SU Carbs problems
Replies: 29
Views: 3713
South Africa

Re: SU Carbs problems

My Jag mechanic rebuilt my series 2 4.2 liter engine carburetors. The trouble with rebuilt carbs is that you can assume nothing, NOTHING. You can not assume that they have the correct parts, or even the same parts. Nothing can be taken for granted. Just this week I had many conversations with a fri...
by jagwit
Sat Jan 11, 2020 7:51 pm
Forum: Series 3
Topic: series 3 vs Series 1
Replies: 65
Views: 7827
South Africa

Re: series 3 vs Series 1

"! They had a magnificent V12 but pretty crude carburation" Well, I don't know what the definition of "crude" is and I don't care. What I do know is that I have fuel injected 3 jag v12 engines (my own OTS etc) and more than 10 v8 engines and I salute our forefathers for what they achieved with their...
by jagwit
Thu Jan 09, 2020 7:02 am
Forum: Series 3
Topic: series 3 vs Series 1
Replies: 65
Views: 7827
South Africa

Re: series 3 vs Series 1

My take on S1 vs S3: 1. S1 no power steering. S3 has. This makes S3 a pleasure in town, but S1 direct feel wins on open road. 2. S1 has poorly turning radius. S3 much better. 3. S1 prices higher than S3 but steady, but it seems to me that S3 prices are gaining on the S1 - which could give the S3 a b...
by jagwit
Sun Jan 05, 2020 5:13 am
Forum: Series 3
Topic: V12 ECU
Replies: 70
Views: 10100
South Africa

Re: V12 ECU

I'm not at home to check my circuit diagram, so will answer from memory. The last position is "start" (this is to engage the starter to make the engine crankl). When the key is in the start position, 12V SHOULD ALSO BE PRESENT on all white wires (like when the key is in the "on" position) . The coil...
by jagwit
Sun Dec 29, 2019 4:58 pm
Forum: Series 3
Topic: V12 ECU
Replies: 70
Views: 10100
South Africa

Re: V12 ECU

The xjs and dd6 had a very elaborate vacuum advance management system to meet emissions standards OF THE DAY. I can't be sure what this one was used for but I vaguely recall one being used to prevent vacuum advance from being active while the engine is still cold to make it warm up quicker and the o...
by jagwit
Sat Dec 28, 2019 12:43 pm
Forum: Series 3
Topic: Help for the wiring loom
Replies: 22
Views: 3132
South Africa

Re: Help for the wiring loom


I don't see air bleed pipes from the thermostat housibgs to the header tank. Are they yet to be fitted?
Please disregard above comment. I became confused with efi t/stat housings and carbed housings.
by jagwit
Sat Dec 28, 2019 7:54 am
Forum: Series 3
Topic: Help for the wiring loom
Replies: 22
Views: 3132
South Africa

Re: Help for the wiring loom

MLBS3V12 wrote:
Fri Dec 27, 2019 10:06 am
Last picture from the car

Image
I don't see air bleed pipes from the thermostat housibgs to the header tank. Are they yet to be fitted?
by jagwit
Sat Dec 21, 2019 11:24 am
Forum: Series 3
Topic: V12 ECU
Replies: 70
Views: 10100
South Africa

Re: V12 ECU

It is indeed the simplest EFI implementation. Now your car will also have an efi wiring diagram which other efi cars are not likely to have.

Being std Jag, should not haunt you IF you sell the car (now how would I know that...)