1972 Nail Project

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Re: 1972 Nail Project

Postby 1972nail » Thu Apr 05, 2018 12:21 pm

Yes, all that is possible with a bit of ingenuity on many engines, but not necessarily as neatly or simply on a Slant 4. The distributor has to be retained as it drives the oil pump. A multi-coil set up does away with the need for a distributor and I don't want an ugly unused object sitting on top of the engine! Yes, you can get an oil pump drive conversion but that costs loads of money.....



Secondly, the No 1 inlet tract is covered by the cast in thermostat housing on the top and passes just over the distributor/oil pump casting on the block below, neither of which can be removed and both obstruct the mounting of an injector directly on the manifold, either above or below.



A single or twin Stromberg manifold could be adapted for one on a single or two injectors on a twin. Instead of trying to use a 175 CD Stromberg the Rover 48 or 52 mm throttle bodies are an almost direct replacement and would bolt straight on just by opening out the mounting holes.

For real simplicity the distributor trigger could be used for 'low resolution' (2 pulses per rev) batch or semi-sequential injection without the need for a crank and cam trigger (high resolution 36 pulses per rev) and that is my aim with the ignition only installation at least. For this to work a smart after market ECU is needed (Speeduino) and not the older design Megasquirt or one stripped off a modern car and tweaked.

For it to run and drive like a factory fitment it will need a bit more sophistication than a banger boy's 'street racer' needs, especially on cold running and part throttle cruising.
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"When you have a Firenza like mine, who needs any Minis?" copyright David Maxwell 1979.
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Re: 1972 Nail Project

Postby 1972nail » Thu Apr 05, 2018 2:13 pm

I'm thinking that a new thread for this Modification is needed so from here on in follow the link.

viewtopic.php?f=22&t=27382
Editor of the VVOC Magazine ReVival

"When you have a Firenza like mine, who needs any Minis?" copyright David Maxwell 1979.
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Re: 1972 Nail Project

Postby fistfullofV5's » Thu Apr 05, 2018 10:58 pm

1972nail wrote:Yes, all that is possible with a bit of ingenuity on many engines, but not necessarily as neatly or simply on a Slant 4. The distributor has to be retained as it drives the oil pump. A multi-coil set up does away with the need for a distributor and I don't want an ugly unused object sitting on top of the engine! Yes, you can get an oil pump drive conversion but that costs loads of money.....

distributor blank.jpg


Secondly, the No 1 inlet tract is covered by the cast in thermostat housing on the top and passes just over the distributor/oil pump casting on the block below, neither of which can be removed and both obstruct the mounting of an injector directly on the manifold, either above or below.

WIN_20180328_10_37_58_Pro.jpg


A single or twin Stromberg manifold could be adapted for one on a single or two injectors on a twin. Instead of trying to use a 175 CD Stromberg the Rover 48 or 52 mm throttle bodies are an almost direct replacement and would bolt straight on just by opening out the mounting holes.

For real simplicity the distributor trigger could be used for 'low resolution' (2 pulses per rev) batch or semi-sequential injection without the need for a crank and cam trigger (high resolution 36 pulses per rev) and that is my aim with the ignition only installation at least. For this to work a smart after market ECU is needed (Speeduino) and not the older design Megasquirt or one stripped off a modern car and tweaked.

For it to run and drive like a factory fitment it will need a bit more sophistication than a banger boy's 'street racer' needs, especially on cold running and part throttle cruising.

Who made that distributor eliminator adaptor David ? I'm in the position of having a redundant dizzy as I'm running Megajolt ignition and have been looking to make an oil pump drive to neaten things up.
Regards, Dave.
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Re: 1972 Nail Project

Postby 1972nail » Thu Apr 05, 2018 11:17 pm

Yes Dave, I've read about your Megajolt conversion, how's it doing?

The distributor eliminator kit is made by one of the Chevette rally engine specialists http://hsrcompetitionparts.co.uk/index.html

It's a made to order part and I'm sure it's not cheap! You'll have to contact them for a price as the kit is not on their website.

Having redundant distributor was the main reason for me choosing to use the single coil set up which keeps the distributor while making the whole lot programmable. In my initial 'ignition only' conversion the only change from standard that will be seen is a small extra wiring loom passing through the bulkhead and an extra wire coming from the distributor.
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"When you have a Firenza like mine, who needs any Minis?" copyright David Maxwell 1979.
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