Triumph Sports Cars

engine swaps and other performance upgrades, plus "factory" V8s (Stag and TR8)

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jimttx
Jim Thompson

(4 posts)

Registered:
06/17/2010 08:31AM

Main British Car:


1973 Triumph Stag with 3.5L Rover all-aluminum V8
Posted by: jimttx
Date: March 24, 2011 04:05PM

Hi All, I live in Keller, Texas and am in the process of rebuilding a 1973 Triumph Stag. I have an aluminum V8 from a land rover which I plan on installing when I get to that point. The picture is of the car after is was chemically stripped and primed and Metal Rehab in South Arlington, Texas. I have had the engine block and 700R4 case and adaptor in the car to fab the motor mounts and transmission mount. The engine is a 3.5 liter from a 1988 vehicle. It has been to the machine shop and should be ready to rebuild. I am concerned about the fuel injection. I am probably a few months away from getting to that point but it is still my main concern. I have had a lot of carburator experience but this will be my first with fuel injection. Any suggestions would be appreciated.
Back from Metal  Rehab 001.jpg



Edited 1 time(s). Last edit at 03/24/2011 04:11PM by Moderator.


rficalora
Rob Ficalora
Willis, TX
(2632 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
Re: 1973 Triumph Stag with 3.5L Rover all-aluminum V8
Posted by: rficalora
Date: March 25, 2011 12:11AM

Hi Jim,

Can't help you with the Fuel Injection question, but if you don't get some input, post in the Engine board. More traffic on that sort of question there. Let folks know whether you got the ECU, engine harness, etc. from the donor or if you're trying to use some sort of after market FI controller.


dwtr6v8
Don Watson
West Virginia
(275 posts)

Registered:
12/07/2007 07:45AM

Main British Car:
1974 TR6 Ford 5.0 HO

authors avatar
Re: 1973 Triumph Stag with 3.5L Rover all-aluminum V8
Posted by: dwtr6v8
Date: March 25, 2011 07:59AM

Welcome fellow Texan!

Looks like you have a solid foundation for a sweet ride.

There are two basic types of EFI systems fitted to the Rover V8s. Both systems respond to information from sensors relating to motor temperature, throttle position, air temperature and engine speed...but neither has any control over ignition.

The first system, uses the Bosch air-flow meter with a Lucas analogue ECU. This airflow meter has a hinged flap that the air/fuel mixture can be altered by turning the CO2 screw on the air flow meter and accurate adjustment requires an exhaust gas analyzer.

The second system, found in the Range Rover/Discovery only, was introduced to coincide with the "new" 3.9 litre engine in 1988 but was also fitted to some 3.5 litre engines. It incorporates an "hot" wire air metering system designed and manufactured by Hitachi and is matched with a digital Lucas ECU with its fueling information stored on a computer chip/Eprom. This system contains no moving parts and employs two sensor wires, one of which is heated, to measure the air mass as it passes over the wires and into the engine. A voltage signal is then sent to the ECU reflecting the voltage required to maintain the temperature of the heated wire as it is cooled by the air flow.

The earlier type was also fitted to the first 3.5 EFI (not catalytic converter equipped) Range Rovers from 1986, is similar (though not identical) to the system fitted to the SD1 Vitesse, the main difference being the ECU (electronic control unit). The hotwire type, fitted to the later Range Rover 3.5, 3.9 & 4.2 vehicles, with or without cat's, despite appearing quite similar, shares few parts with the "flapper".

One needs a digital computer to diagnose a digital computer (ECU) and software and knowledge to TUNE it, thus I like carbs!
Picture 1.jpg


jimttx
Jim Thompson

(4 posts)

Registered:
06/17/2010 08:31AM

Main British Car:


Re: 1973 Triumph Stag with 3.5L Rover all-aluminum V8
Posted by: jimttx
Date: August 02, 2011 09:59PM

I believe that I got everything off of the Rover. Wiring harness, Computer, Fuel injection System. I also got an injection system from a 3.9 off of Ebay.
Dailey Med 002.JPG


tr8todd
Todd Kishbach

(359 posts)

Registered:
12/04/2009 07:42AM

Main British Car:


Re: 1973 Triumph Stag with 3.5L Rover all-aluminum V8
Posted by: tr8todd
Date: August 03, 2011 08:25AM

You could always ditch the FI and throw on a 4 barrel carb.


donkelly23
Don Kelly
Charleston, SC
(111 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: 1973 Triumph Stag with 3.5L Rover all-aluminum V8
Posted by: donkelly23
Date: August 03, 2011 11:56AM

Todd, OLD SCHOOL

Jim, I am using,on my 4.0, the FI out of a ODB1 GM, (Z28,Corvette) Basically map sensor, IAC,TPS,and IAT.
It's tuned by a company in MI.
Also if your smart, you can "squirt" it
Don


KBStag
keith bohanan

(13 posts)

Registered:
08/31/2011 10:10AM

Main British Car:


Re: 1973 Triumph Stag with 3.5L Rover all-aluminum V8
Posted by: KBStag
Date: August 31, 2011 07:59PM

I have a Stag with a sweet Chevy 350 and a large cam. Oh my. Super fun.
Keith1.JPG



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