Triumph Spitfire, 1500inj with 4x42mm throttle bodies

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pluisje
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Triumph Spitfire, 1500inj with 4x42mm throttle bodies

Post by pluisje » Thu Jul 24, 2008 6:05 am

I rebuild a 4 cylinder 1500cc triumph engine to electronic injection,
despite some Triumph specialists, who said it couldn’t be done.

I had to make a 36-1 pickup on the crank, nothing off the shelves by Triumph for this.
I disconnected the mechanical fuel pump and used the normal fuel line as return.
An extra fuel line with 2 connections on the fuel tank and a 4 bar fuel pump.

I basically used 4 throttle bodies on Weber intakes with Weber air-filters
and after the manufacturing of the 36-1 pickup and sensor it was a down-hill battle of putting
parts on the car and wire them to the computer.

The project started in the start of 2008 and was finished after 5 months,
basically because I was driving around the first 2-3 months with 2 carburetors and
having the MS logging more and more data.

Also I had 2 small band lambda injectors installed and after installing the electronic injection
I waited to long for ordering a wide band sensor and get the car running smooth.

The ignition is a basic table that came with the computer, working with the old 12v spark coil and spark distribution.
I simply made some runs and heard the car fire (heavy sound) and put the ignition map 3
degrees later, till the nasty sound was gone.

It isn’t the most expensive car and it isn’t the fastest now, but I still enjoy working on it and I
am looking for next month for the APK (Dutch yearly check).

Image

working on the VE-table now;

Image

Image

one happy customer;
Image

sprint_turbo1
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Re: Triumph Spitfire, 1500inj with 4x42mm throttle bodies

Post by sprint_turbo1 » Thu Aug 28, 2008 9:34 am

Looks nice install! I have a spit with dolly sprint engine running MS2 and EDIS and turbo. I am interested in how you setup the warmup air feed. I see that you have a balancing pipe across all 4 ports which is same I have done, are you using a solenoid or pwm idle valve? my balance tube is coupled to a dump valve 1 end with feedback to fuel press reg and the other feeds the MS unit and has warm up solenoid on it. I can't get MAP pressure to go below 75kpa. I know the solenoid does not shut off completely when warmed up so this could be prob as it takes it inlet suppy from a plenum on front of throttle bodies which also sees boost when it occurs.
Sprint turbo inj 2.jpgSprint turbo inj 2.jpg
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pluisje
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Re: Triumph Spitfire, 1500inj with 4x42mm throttle bodies

Post by pluisje » Fri Aug 29, 2008 7:36 am

nice to see more Spitfires :D
seems to be the ultimate poor mans sports car with a lot of potential :mrgreen:
a turbo would be nice..
but driving at 100km/uur on the highway, you already starts to wonder when it will take off
and fuel isn’t for free in Holland…
sprint_turbo1 wrote:I am interested in how you setup the warmup air feed.
I see that you have a balancing pipe across all 4 ports which is same I have done, are you using a solenoid or pwm idle valve?
well, i don't have one..
because i don't need it right now, starting in the morning you need to give a little throttle if it fires up,
but after keeping it spinning at 1.500 voor 5 seconds, it just idles at 700 rpm the rest of the day.

idles at 75kpa, drops below 20kpa when slowing down on the engine.



i did rebuild one of these;
Image

this one is completely shut down at 0volt, so ideal for a PWM idle control mod.

Moe
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Re: Triumph Spitfire, 1500inj with 4x42mm throttle bodies

Post by Moe » Tue Apr 21, 2009 4:52 am

Hi,
I am in the final stages of assembling my Megasquirt Conversion on my 1980 Triumph Spitfire 1500, hopefully for a first test next weekend.

It has
Stage 3 head
Fast road 83 Cam
40Thou overbore
4-2-1 manifold

EDIS ingnition
40mm Weber throttle bodies

I have tested the EDIS running it in conjuction with the the original carbs and all seems OK.


I was wondering if you could send me your configuration files (they include the maps don't they?) so I would have a base to work from. I am paranoid about melting something by running it too lean so would like a known running config to work from.

Thanks Moe.

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pluisje
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Re: Triumph Spitfire, 1500inj with 4x42mm throttle bodies

Post by pluisje » Thu Apr 23, 2009 12:10 pm

Code: Select all

  100kPa 199 183 160 174 205 219 242 236 201 192 186 185
   97kPa 156 139 120 131 157 184 208 178 152 143 136 138
   94kPa 110 107 104 107 122 147 168 144 123 130 111 115
   91kPa  80  79  86  94 108 128 133 114  87  96  98 100
   88kPa  63  67  71  87  94 109 113  96  79  82  86  90
   84kPa  61  59  56  75  81  91  90  80  73  73  75  73
   80kPa  49  47  43  64  67  77  78  73  64  63  65  65
   75kPa  39  39  40  49  60  70  70  63  53  49  54  54
   70kPa  40  36  32  35  43  51  53  46  36  34  39  35
   60kPa  38  32  29  23  20  26  27  23  19  19  18  19
   40kPa   9  22  24  17  12   9   7   7   6   7   8   9
   20kPa   3   3   3   3   6   6   5   5   3   3   3   3
         0.5 0.8 1.1 1.4 2.0 2.6 3.1 3.7 4.3 4.9 5.4 6.0
0.5 = 500rpm
6.0 = 6000rpm

put this into your VE-table
and adjust your fuel requerement untill it starts..
if it doesn't start, you'll need more fuel,
if it smells like CO, you'll need less..

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