Search found 366 matches

by jagwit
Wed May 15, 2019 2:22 pm
Forum: Series 3
Topic: ECU on EFI cars
Replies: 20
Views: 707
South Africa

Re: ECU on EFI cars

I add about this ECU that 2 of the last V12 E type restored by Etype UK are equipped with this K6 ECU. It should be said at the same time if the original low impedance injectors and fuel rail were used or high impedance injectors. I say again. Using current limit resistors IS NOT a good solution fo...
by jagwit
Mon May 13, 2019 8:24 am
Forum: Series 3
Topic: ECU on EFI cars
Replies: 20
Views: 707
South Africa

Re: ECU on EFI cars

Dear Michel With my previous posting, I only looked at Emerald from a technical viewpoint. This morning, I looked at its price and was shocked to see how expensive it was GBP714 (Euro827) !! By comparison, a Megasquirt-2 will be about USD350 (Euro312) - including a few extra bits and pieces. MS-2 wi...
by jagwit
Sun May 12, 2019 5:57 am
Forum: Series 3
Topic: ECU on EFI cars
Replies: 20
Views: 707
South Africa

Re: ECU on EFI cars

Michel I see that the Emerald K6 can only handle high impedance injectors (14 - 16 ohm). This is normal. The jag injectors are low impedance . In the FAQ of Emerald's web site they say that one can run low impedance injectors with K6 using ballast resistors. This is only partially correct. Using bal...
by jagwit
Sat May 11, 2019 4:48 pm
Forum: Series 3
Topic: ECU on EFI cars
Replies: 20
Views: 707
South Africa

Re: ECU on EFI cars

I suggest you get the car running with original ECU.

DO NOT UNDERESTIMATE the complexity of tuning an engine. If you have not done so before, don't even try. Take it to someone who knows how to do it.
by jagwit
Thu Apr 11, 2019 8:54 am
Forum: Series 3
Topic: ECU on EFI cars
Replies: 20
Views: 707
South Africa

Re: ECU on EFI cars

I mounted my Megasquirt ECU against the "ceiling" of the passenger footwell. I needed easy access to it with the comms cable from my PC. IF you can find space in the boot, mount it there otherwise you will have to change some wiring (eg, to the fuel pump). There is an unused plate on the passenger s...
by jagwit
Mon Apr 01, 2019 6:57 am
Forum: Series 3
Topic: Oil pressure gauge
Replies: 19
Views: 1352
South Africa

Re: Oil pressure gauge

When re-commissioning a friend's car, we purchased a new sender AND gauge from the co now representing Smiths. The sender I received looked correct physically, but it was a mismatch against the gauge. It turned out the Gauge was wrong. The second shipment they sent was correct. I found the info whe...
by jagwit
Sat Mar 02, 2019 4:43 pm
Forum: Series 3
Topic: Capacity and compression ratio increase
Replies: 20
Views: 813
South Africa

Re: Capacity and compression ratio increase

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? Yep, I still have the 3.31. Thought I would need it in my Chev C10 project if I end up fitting a jag front and rear suspension....
by jagwit
Fri Mar 01, 2019 11:21 am
Forum: Series 3
Topic: Capacity and compression ratio increase
Replies: 20
Views: 813
South Africa

Re: Capacity and compression ratio increase

not sure if the e-type manifolds fit onto HE heads, e-type exhausts hug the block while HE pipes splay out? just the efi may not provide significant benefit over existing carb'd engine? Also hi-comp HE provides better performance and efficiency compared to even the 1980 10:1, the reason why the lat...
by jagwit
Thu Feb 28, 2019 1:21 pm
Forum: Series 3
Topic: Capacity and compression ratio increase
Replies: 20
Views: 813
South Africa

Re: Capacity and compression ratio increase

"Presumably I need the HE heads as well as the pistons and liners so maybe an XJS engine swap maybe easier." Correct. It all comes down to whether you want to be able to claim a "matching numbers" car. I recon you could still claim "matching numbers" even if you install the complete (!!pre-HE!!) XJS...
by jagwit
Wed Feb 27, 2019 7:18 pm
Forum: Pub Chat
Topic: My latest toy
Replies: 0
Views: 445
South Africa

My latest toy

1970 Chevrolet C10 pickup truck:
350 Chevy V8;
Drum brakes all round;
Manual steering;
Manual brakes;
No seat belts;
No ventilation or heating system.
tn_20190204_143306.jpg
tn_20190204_143306.jpg (237.98 KiB) Viewed 445 times
tn_20190204_144714.jpg
tn_20190204_144714.jpg (195.89 KiB) Viewed 445 times
by jagwit
Wed Feb 27, 2019 7:11 pm
Forum: Series 3
Topic: Capacity and compression ratio increase
Replies: 20
Views: 813
South Africa

Re: Capacity and compression ratio increase

Were they 1980 only? I'm not sure. I do know it was only the very last of the pre-HE's that had this 10:1 engine and it may only have been for the European market because of fuel quality. I'm really not sure of all this. Kirby's book might have more accurate info. Also, could you run the HE pistons...
by jagwit
Wed Feb 27, 2019 11:01 am
Forum: Series 3
Topic: Capacity and compression ratio increase
Replies: 20
Views: 813
South Africa

Re: Capacity and compression ratio increase

There are two other (inexpensive) options you may consider... 1) The 1980 XJS pre-HE 5.3 engine came with 10:1 CR. Scarce, but if you can find a good set of those; 2) Convert the engine to Euro spec HE with 12.5:1 CR. I did this on that E-type I EFI'ed, fitted the HE pistons and heads to it. It ran ...
by jagwit
Thu Jan 17, 2019 6:37 am
Forum: Series 3
Topic: 4 speed manual to OD conversion
Replies: 15
Views: 818
South Africa

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 :lol: In that case, I can be more direct. I think those curves are seriously flawed. ...
by jagwit
Wed Jan 16, 2019 9:04 am
Forum: Series 3
Topic: 4 speed manual to OD conversion
Replies: 15
Views: 818
South Africa

Re: 4 speed manual to OD conversion

https://i.postimg.cc/kXDh2LC5/jag-torque-compare.png Colin, I find specifically your V12 HE torque graphs rather interesting! Below the dyno graphs of my ex E-type which had the 11:1 HE + EFI conversion. This run was done at 1800m AMSL where normally aspirated engines lose between 15-20% of the pow...
by jagwit
Fri Jan 11, 2019 4:47 pm
Forum: Series 3
Topic: 2.88 diff fitted
Replies: 6
Views: 452
South Africa

Re: 2.88 diff fitted

I do use a 2.88, a getrag 5 speed A picture from the car with a few things to do :-) What ratio is 5th on the Getrag? Oi!! Just a FEW things.... I should add that my experience is with the car at 1400m (4500') AMSL - where normally aspirated engines lose 15-20% of the power they make at sea level. ...
by jagwit
Fri Jan 11, 2019 3:29 pm
Forum: Series 3
Topic: 2.88 diff fitted
Replies: 6
Views: 452
South Africa

Re: 2.88 diff fitted

Drove the car again today.... Frikken bluddy marvellous!! Of course I'm being subjective, but I can't help feel that the car is happier now, MUCH happier. Now its a proper GT. With the 3.31 it was a misfit, not a GT and not a dragster either. I would also say that it FEELS as if the car accelerates ...
by jagwit
Thu Jan 10, 2019 5:59 pm
Forum: Series 3
Topic: 2.88 diff fitted
Replies: 6
Views: 452
South Africa

2.88 diff fitted

I have now fitted a 2.88 to my S3 (auto) Its important to understand that my car was fitted with a 3.31 by some PO. If my car had the original 3.07, I would not have bothered. But running 3300rpm @ 120km/h (our speed limit) seemed so wasteful. I removed the IRS (alone) in two hours - having done thi...
by jagwit
Thu Jan 03, 2019 6:32 am
Forum: Series 1
Topic: some observations......
Replies: 14
Views: 3307
South Africa

Re:

1. No point running the fan if the engine isn't running as coolant isn't circulating. I'm not so sure. My Series 3, XJS and both my Jensen Interceptors run their fans after ignition off- if the fans switch was on prior to switch off. I've been wondering how much circulation remains present due to t...
by jagwit
Fri Dec 21, 2018 11:38 am
Forum: Series 1
Topic: What causes plugs like THIS??
Replies: 27
Views: 2785
South Africa

Re: What causes plugs like THIS??

Update:

This car has now been driven quite a bit since doing all this work and the plugs are no longer fouling as per post #1.

I am now convinced that the vacuum leaks were the main cause of the plugs manifesting like this.
by jagwit
Fri Dec 21, 2018 11:31 am
Forum: Series 1
Topic: Faults found on '68
Replies: 6
Views: 549
South Africa

Re: Faults found on '68

I assume you have fixed them, Yep, its a "get-in-and-drive-with-confidence" car now. I keep telling the owner that he can now drive the 1600km from Pretoria to Cape Town (and back) with confidence, but after struggling with the car for over 20 years, I understand that it will take some time before ...