TR7 & TR8 Mailing List

TR7 and TR8 Mailing List Messages => Wedge List => Topic started by: Waldon Williams on February 24, 2018, 02:15:02 PM

Title: Megasquirt?
Post by: Waldon Williams on February 24, 2018, 02:15:02 PM
Just curious, has anyone converted a TR8 to Megasquirt EFI?

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Title: Re: Megasquirt?
Post by: Bill Derksen on February 24, 2018, 02:30:16 PM
Both Will Parris and myself are running MegaSquirt. Here is some info on

mine:

https://billstr8.shutterfly.com/newengine



Mine is pretty tame compared to Will's!



Are you starting with an originally EFI'd car, or starting from scratch?



Cheers

Bill
Title: Re: Megasquirt?
Post by: Waldon Williams on February 24, 2018, 03:05:35 PM
Hi Bill, thanks for your reply. I am starting with an original EFI SD1 that

was rebuilt to a 3.9 engine years ago. We (my tech Carlton and I) have been

trying to get the car starting, idling, and running better for years with only

limited success. We have tested and/or replaced most every sensor and Jim

Tencate has redone the ECU. Aside from old age (the car and me), the stock

ECU/EFI system has absolutely no adjustability and, as Ibm sure you know, if

there is any tiny fault in the system, it can have an annoying effect.

Megasquirt is one of the options I am considering, but I am open to other

suggestions. I was wondering if a newer Range Rover (1994 - 2002) system might

work, but I havenbt researched that yet. What I want is a good running

street car that will start in all conditions (hot and cold), idle smoothly,

and have improved power, especially in mid range acceleration. I am not

looking for a race car, but a well functioning street car.



Thanks



Waldon



>
Title: Re: Megasquirt?
Post by: Bill Derksen on February 24, 2018, 04:24:26 PM
The later Land Rover GEMS and THOR(?) won't fit under the TR7/8 bonnet.

The CUX "Hotwire" system from an '89(?) to ~94 Rover will fit with minor

modification. This system and all associated wiring and sensors is

relatively easy to separate from a Range Rover. You can use that as-is

or control that hardware with several different versions of MS. There is

a lot of RV8 info here:

http://www.extraefi.co.uk/products/RV8_kits.html



Cheers

Bill
Title: Re: Megasquirt?
Post by: William Parris on February 24, 2018, 04:25:37 PM
Ibd use the newer Range Rover intake from a 3.9l. Then you can run better

injectors from what the SD1 uses.  Still old and crude to todaybs standards.

But will work better.  Not too hard to setup if you go with basic.   Let us

know if any questions.



Will



Sent from my iPhone



>
Title: Re: Megasquirt?
Post by: Trevor Norris on February 25, 2018, 12:46:47 AM
I MS'd mine a couple of years ago. I wanted to keep it reasonably stock

looking. Also as an MS virgin I didn't want to overly complicate things. If

I was starting today I would probably add sequential injection and

coil-on-plug ignition like William has done.



Mods were:-

I kept the flapper in place but tied the flap vane open as I used a MAP

sensor to indicate engine 'load'.

Replaced extra air valve with a GM stepper IAC.

Cold start injector left intact but dormant.

Ford EDIS controller and coils using wasted spark. I cut top off

distributor to make space for coils and leave oil pump drive in place.

Fitted 36-1 tooth wheel on crank balancer.

Wideband O2 sensor fitted to one exhaust downpipe and narrow band to other

side. Narrow band was initially only used to sense check air-fuel ratio. I

may replace with a wideband.

I used stock coolant and air temperatures.

Original TPS (throttle pot) was unreliable and I replaced it with a GM

style hall effect TPS.

Radiator fans are controlled by MS. I kept this simple and drive both fans

together but I may setup MS to turn on fans in serial at 'normal' temps and

in parallel at higher temps.



Setup and tuning is a fairly steep learning curve but very rewarding. I

know a LOT more about engine dynamics now! Tuner Studio auto-tune really

helps once the tune is reasonably close to optimal. However, it doesn't

cover ignition timing so I use stock timing values with a bit of extra

advance below idle RPM to help stabilise idle when A/C switches on/off

although I think the stepper idle control valve does this now since I

turned on auto idle control.



I find the Tuner Studio dashboard on an Android tablet very useful when

driving for things other than tuning. I was able to identify a faulty

coolant temp gauge by comparing it to the MS sensor reading. It turned out

the gauge needle pivot was distorted. It also impresses unsuspecting

passengers although it annoys my wife!
Title: Re: Megasquirt?
Post by: Jack Brooks on February 25, 2018, 01:30:29 AM
I am running an SD1 intake with an early (MS1) Megasquirt, fuel only, on my

1980 TR8.  It starts and runs well on the road now.  The car needs further

tuning and a bunch of other restoration stuff done before I can consider it

a driver.  All I need is time. This project sat for about 10 years, but is

now getting more attention.



While it is old info and needs updating, here is the link to the Megasquirt

Success Story I posted <YIKES!> 10 years ago..

http://www.msruns.com/viewtopic.php?f=92&t=22528.



I did the Megasquirt conversion because my carbs were trashed by the DPO.

The costs to replace the carbs was close to my estimate of the MS conversion

and it's been a fun, although way too long journey.  Now that it starts and

runs (almost) like a modern car, I can say it's been worth it.  I just need

to get it over the finish line.



Jack
Title: Re: Megasquirt?
Post by: zt99@aol.com on February 25, 2018, 08:22:29 AM
A few people are running fitech on their 8bs.  Youbd need a different

intake which you can get easily and cheaply (wedgeshop, tsi, etc) set up for a

4 barrel carb.  Since youbve got efi now the pump/lines get reused, canbt

see it taking you more than a few hours to install.  Theybre self tuning and

actually work, pretty cool technology.

--

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Archives provided courtesy  http://www.triumphwedgeowners.org
Title: Re: Megasquirt?
Post by: zt99@aol.com on February 25, 2018, 08:22:29 AM
A few people are running fitech on their 8bs.  Youbd need a different

intake which you can get easily and cheaply (wedgeshop, tsi, etc) set up for a

4 barrel carb.  Since youbve got efi now the pump/lines get reused, canbt

see it taking you more than a few hours to install.  Theybre self tuning and

actually work, pretty cool technology.

--

.

Archives provided courtesy  http://www.triumphwedgeowners.org
Title: Re: Megasquirt?
Post by: Darrell Walker on February 25, 2018, 09:56:28 AM
Ibm one of those people running the FiTech.  One thing to understand, self

tuning (really self learning) just means the system learns how to maintain the

AFR targets you set.  It is still up to you to figure out what the AFR targets

should be.  Also, if reusing the stock FI pump, make sure to turn off the PWM

(pulse width modulation) that FiTech can do.  The Bosch pump doesnbt last

long treating it like that.



-Darrell



>
Title: Re: Megasquirt?
Post by: Jack Brooks on February 25, 2018, 12:41:14 PM
The learning function of FiTech is the same as Tuner Studio for Megasquirt.  It will dial in the tune, but you need to determine the data points in the AFR table.  That is where I am now.







I have been incredibly impressed with Tuner Studio's cold start mapping.  Reads and remembers the cold start functions and remaps accordingly.  







Jack