1965 Mk1 road/rally Bitsa, (now supercharged 8 port)

[Richspec]

Cheers Stu

Mitp completed, no MAJOR issues...
Ran fine most of the way down but towards Northampton decided it would idle at 2500 rpm, which was nice

Diagnosed on sunday as being the throttle screw vibrating loose, at zero adjustment the idle was high, screw it in a tad it went down to a minimum 1500. Also the modified throttle arm was holding the thottle open a touch so that was modified on site Sunday afternoon.
Due to high idle it was warm queing to get in and so switched the electric fan, which then decided to vibrate its fixings loose and nibble the inner wing.
Front and Rear number plate fixings vibrating loose, fixed this past week.
Gearstick rattle - stripped out anti vibration plunger and its quite worn, will get some new bits with the next Minispares order.

Then i got a bit of food poisoning and spent a good chunk of monday in my hotel bathroom, so missed out on a diversion to Minispares north on the way home.
Came home late evening Monday and had to endure A1 north diversions round every village in North Yorkshire some very surprised pub exiters seeing me roar past at that hour It ran beautifully in the cool evening air and with two sets of ear protection on it was lovely

The digital central speedo is jumping around a lot, I spoke to digital speedos at MITP and theres a mismatch between the spindle in the adaptor and the bit in the gearbox which can be taken up with a bit of heatshrink, apparently..

I've continued to mess around with main jets, idle jets, air correctors and emulsion tubes and last night was the best its been so far. tonight will run the test route again (155 mains, F7 emulsion, 150 air corrector).

Sunday went to local car show and had both MK1's alongside each other

14045994_10210664813887516_3696303179030331547_n.jpg

[Richspec]

Entered the Monte Heritage run then realised its a night event so thought I'd whack some lights on the front for winter.

So quite a few parts later and several long evenings work..

KIMG0229 - Copy.jpg

Yes they are Britax lights, okay maybe not really classic looking for some some, but like i care! FFS they've got Britax on them LED sidelights bulbs (5w Cree's) in all lights to help a tiny bit with power consumption, main spot bulbs are 2 different styles of PIAA 55w load 110w outputs. I used the redundant heater and choke holes to add switches in centre switch panel so i can turn them off, twin fused relays behind grille on a clear perspex panel.

and to keep them protected

KIMG0223.jpg

[Richspec]

Cumbrian canter successfully completed today having replaced the damaged wiring and robbed the original light switch and dip off the other mk1 last night.
still got a mega rattle from the gearstick even after fitting new anti rattle spring and plunger, unless theres more than one in the remote mech?

start finish venue was nice!

IMG_1264 - Copy.JPG

[minitravellerman]

The wee motor looks fantastic. Looking forward to getting a look around it come January

[Richspec]

Another event successfully ticked off, MG Cumbria's christmas cracker run, a tulip guided tour around 70 miles of the lakes, absolutely gorgeous out there today with still lakes and crisp fells, and lots of lovely cool air getting wolfed down by my weber.
Having fried my speedo sensor (connecting it to 12v as per incorrect wiring notes) i got a replacement sent up this week from Digital Speedos, with the cable feed pre modded to better fit the larger size speedo drive in my gearbox, this meant yesterday morning was spent out and about calibrating the speedo and trip, which made today a lot easier!

here we are at the mid way control.

15317947_10154836470365984_5662025545161756794_n.jpg

theres not much scope to add decorations compared to many!

more suspension fettling required, a dyno session and the next event will be the Monte Heritage run in January.

[Richspec]

successful dyno at Minisport this week, we only did load checks at the usual pinking points to make sure my map was ok and drilled out the main jets two sizes to cure top end weakness. Rob reckoned my home built ign map was fine, yes we could probably spend ages tweaking the ign by a few degrees here and there to gain the odd horsepower but every chance we could end up loosing the inherent driveability i enjoy and make the engine more cammy, so really a soft engine map if that makes sense?
I've copied the torque figures off the printout and done the conversion to bhp, we all know the minisport dyno does some weird thing to the figures so i'm assuming the torque is at the wheels and unaffected by the large trans drag i had? Maybe someone can confirm that?

I'll get the actual printout in later but heres my homemade excel file.

Book2.pdf

[Richspec]

dyno sheet.

KIMG0286 - Copy.jpg

and in traditional pre Blyton fashion I'm making sweeping changes once all the bits arrive from here and overseas.

[Richspec]

Got the mobile phone vid on Youtube now, sadly the microphone couldnt cope so well after around the 48 second mark, too loud man
If only i'd actually put SD cards in the gopro's i'd taken with me

https://www.youtube.com/watch?v=MevQo9X1BnA

[Richspec]

can't leave nowt alone me, a few changes under way

KIMG0323 - Copy.jpg

lots of laptop tweakage coming up to get the fueling as close as possible before the next dyno session.

[JohnA]

Ready for Harewood June 3rd?

[1071 S]

".....still got a mega rattle from the gearstick even after fitting new anti rattle spring and plunger, unless theres more than one in the remote mech?.."

Standard remote shift???? I'v posted the solution to this many times .. but no one seems interested so now i don't bother..

Send me PM and i'll send you a picture.....

Cheers, Ian

[Richspec]

Hi, I sorted this, my mate with a 1071 was saying his does the same and explained it was the two bolts / studs that hold the whole thing together coming loose and he has to retighten then often, 'why not use threadlock i asked......'

so checked mine and yes it was the same, a combination of rusted up nuts and stripped threads so sorted that and its back to what i imagine normal must be like.

[Richspec]

Right so I'd spent a shed load of time and money getting it rolling roaded at Minisport, it went really, really well, sounded amazing and had some lovely pops from the exhaust, but there was a hiccup in the fueling in the middle of the rev range that was going to need more parts, more time, more money to try and iron out, if i wanted to. The other downside was now it was fully on song it was absolutely drinking the fuel, like Penrith to Glasgow on a tank quickly, and that was just at normal 65-70mph cruising. the cruising midrange was really rich and even going back down on the main jets from the minisport settings didnt help. WTF

So i thought about it and the more i applied man maths to the situation the more it made sense..ditch the carbs and go fuel injection, a wet manifold system is a compromise in a mini because i was probably going to make the port robbing and unequal afr's between the inner and outer cylinders worse, its all to do with sqirting fuel in as opposed to sucking it in blah blah blah. The big advantage is that i can control the fueling at all points of the rev range at all engine loads. I should in theory be able to have a mostly nicer cake and eat it.

Then it was a just a case of working out what additional parts i needed and sourcing them all, the biggest stumbling block being i wanted to keep the downdraught and the choice of ida throttle bodies is slim to say the least. The defacto choice would have been 48Jenveys but i wanted to keep the bore size down as the ida was choked way down anyway and keep as much airspeed through the bodies as possible to help with fuel atomisation, plus boy, do they know how to charge. £££££££

To that end i ended up getting a pair of ida bodies off ebay, from hong kong, but actually coming straight from china. The bodies, fuel rail, and the included injectors included came to less than just the body from Jenvey.

In the meantime i left the carb and everything as was so if they didnt turn up till the back end of the delivery window i could just leave the car as it was for the next event.

Eventually they arrived, no customs charges either and i set to trial fitting to my old manifold.

first fit.jpg

it was looking ok, the fuel rail would clear the bonnet underside and the bodies are shorter than the weber, this does mean the air filter is tight to the hole in the bonnet which doesnt 'fit' as well as before though.

modified.jpg

The other problem is that all the new throttle bodies have the holes for trumpets etc arranged as per dcoe, at the 11 and 5 / 7 and 1no'clock positions, the proper ida's are 12 and 6 this meant adapting the filter baseplate to fit, making a blanking plate, which was handy to hold the air temp sensor and once they came quite a few mods to the air horns /trumpets.

The first job was to add in additional wires to the new omex 600 ecu for the injectors, lambda sensor and one for fan control, i also added P lights to illuminate the dash switches and a light up horn button, all issues found on the monte heritage run we did.

rewiring.jpg

plight1.jpg

plight2.jpg

[Richspec]

now steaming on I started the wiring in the engine for the injectors, rewired the throttle position switch from the arse about face way i'd had to make it work on the weber and made up and adaptor bracket to hold the fuel pressure regulator.

install.jpg

fpr.jpg

Then it was a case of making up new fuel lines in the engine bay and connecting everything up.

done.jpg

In the boot the old tank was removed the wiring changed, the mpi tank installed and a fuel filter fitted.

old tank.jpg

I'll miss the suppliers list.

filter.jpg

a return pipe of 10mm copper was run under the car and up into the boot.

[Richspec]

Because my new ECU was s/h off ebay it was locked, and unlocking meant wiping the base map on there and then copying all my settings across from the omex 200 ecu, i tried to start the engine but it would crank and not see rpm, whereas put the 200 back in and it would.
I was trying it for a couple of nights, checking all the obvious stuff and getting nowhere when something went 'pop' and a mushroom cloud of smoke rose gracefully from the front of the car

melted..jpg

exit one coil pack. While I sourced another i emailed Omex for help and immediately got the reply it was my map at fault and 'try this one', on further questioning theres loads of settings and variables you can't access so my blank map was never going to work.

Next job, check for fuel leaks, check and set fuel pressure, lots of blue paper everywhere and to my surprise the only leak was from the test gauge

checking!.jpg

Once happy with that, and seeing the engine rpm displayed in the software, it only went and started

no one was more surprised than me! after a couple of nights of tweeking the idle is okay now, the cold starting is getting there and it drives up and down the yard quite well, certainly less spluttery and evil than the weber was to start off with.
That cake is tasting ok so far.

Now to get some road mapping done before next weekends touring event then after that a dyno session before Blyton, I will also re dyno at minisport for a comparison.

[wantafaster1]

Excellent work!

[Richspec]

Quickish update, out mapping on the road yesterday afternoon, which did absolutely nothing to help my banging bad head

And it went, well, shit really.

Massive flat spots, which is to be expected and with my co driver banging away on the keyboard and cursing the bumpy roads it did get a bit better, part throttle cruising at 40-50mph wasnt too bad. However, it was hitting a brick wall at 50+ it just didnt want to pull at all, and absolutely refused to go up hills, gradually dying on its arse as i went down through the gears to keep it going.

It feels as though its hugely rich, but thats not what the lambda gauge is saying and seems to drop onto cylinders 2+3 under load.
Checking the plugs when i got back confirms that the middle 2 were rich -not far off, and the outer 2 were wet with fuel.

With the weber it was always the case that cylinders 1 and 4 were weak (powerwise) you could pull the plug caps at idle and it made f'all difference, this seems the same but worse, tonight I'll be checking the wiring to the coilpack for broken wires / misplaced pins etc etc.

If i cant get a dyno before the weekend I have a choice, leave as it is and take the 8 port, which isnt ready to roll, or swap over back to the carb for this weekends tour, and then back again before Blyton.

[Richspec]

Further update:

The injection wouldn't work as i had it, the ecu just couldnt do what i needed, the new one should, fingers crossed!, so it was a swap back to carb for yesterdays tour and the injection will be refitted from tonight and re wired.

so swansong for the weber? maybe!

https://youtu.be/_rEpEDZ6qYg

[timmy201]

I've wondered how well those fuel injection throttles would work. Have you got one of the witchcraft Siamese port injection maps to try and get the fuelling right?

[Richspec]

sort of!

I'd originally been aiming for 'wet manifold' injection but it became clear that what i actually had was port injection, due to the split across the cylinders based on the IDA configuration. (Like the MPI minis). The only way Omex would control it was to batch fire both injectors, ie all the time.
The new DTA ECU will sequentially fire the injector for each cylinder, I'm converting a distributor to act as a cam sensor to make this work.

There's a ton of adjustability with the DTA, I can make the injection event happen at different times in relation to each cylinder's TDC, and I believe at different times again versus different load sites. (I need to confirm than when its up and running), I can also trim the fuel percentage to any cylinder to hopefully minimise the port robbing effect on Air Fuel Ratio's between cylinders.
There may be some compromises made as I don't think the IDA shape of manifold is the best for injecting into. Not without moving the injectors anyway.

Its a big adventure!

Rich