1400 spi--1400 T40?

[greg1.4]

hi, i have got a 1400 spi nova and want to do away with the injection system and fit my twin 40's..

i got carbs, inlet manifold, pressure reg, throttle cable and linkage, trumpets, alternator lowering bracket...

what else do i need to do? what do i need to do with the ignition/electrics side of things?

thanks alot,
Greg

[Adam]

Wire a switch to manually switch the fuel pump(use the existing relay)
And fit a Nova 1.4SR ignition system(coil,dizzy,module,loom)

Id recommend you service the carbs too unless they've been recently done.

[greg1.4]

ah, how do i wire the fuel pump onto a switch?? could do with a bit more detail.thanks

if i fit a 1.3 SR coil and dizzy (is it just the cap)
can i just unplug the coil and put a sr one on?

Greg

[greg1.4]

oh and the loom, cant i juse unplug the old coil or do i have to wire in a plug or something for the SR coil?

[greg1.4]

can anyone help me please? i am wanting to fit my twin 40's tonight.:D

Greg

[Adam]

You need to switch an ignition live to the SPIs fuel pump relay.
The Live, Fuel Pump live, and Earth will be fine as they still work even with the spi ecu removed.

You need a carburettor engine complete ignition system, the complete dizzy, coil,module(under the coil) and the loom.
The loom will need 3 wires connecting, one ignition live can be joined to the wire that supplied the spi coil.
The earth bolts to the inner wing, the tacho output will need a wire running from the green wire to the clocks(you cant use the spi coil one)

A 1.3/1.2 dizzy wont fit your spi cam.

Unplug the spi dizzy,coil,module(the plugs will have to stay in the bay as they aren't removeable), then just fit the carb dizzy,coil, and wire the 3 wires.

[greg1.4]

so i cant fit a 1.2/1.3 dizzy, coil and module?

ah, so can i put a 1300 SR head on my 1400 spi and will this give me more power? then i can fit my 40's onto the 1.3 head and run a 1.3 coil, dizzy and module, yes?

what work do i need to do for this?

also i have got a 1.3 SR engine in my 1.2 shell and want it to be running too, so if i take my 1.3 head off it and fit to my 1400 can i put a 1200, dizzy, module on the 1300 bottom end?

bassicaly what i want is too running novas without buying any more parts.

i want a nova with twin 40's for autotesting and another one reasonably standard for the road..

i have a 1.2 carb engine complete, 1.3 SR complete in 1.2 shell, 1.4 spi in car i want 40's on..

i intend to put a 1300 head on my spi nova and run 40's....
and have a 1200 head on a 1300 sr bottom end? will this work?

cheers for your help LLTN!:thumb:

Greg

[Adam]

1300 head will fit the spi block yeah, you will need to fit the 1300 cam too(to fit the 1300 dizzy)
What port inlet do you have for the 40s?

Yeah the 1200 dizzy etc will work with a 1300, the 1200 head will fit the 1300 block, altho you may have to measure the cr to make sure it doesn't increase too much.

[greg1.4]

erm...whats better?lol




as mine are round ports on the inlet manifold...

cheers for your help mate. much appreciated.:thumb:

Greg

[greg1.4]

while this topic is here, whats involved in swapping the heads over? what do i need to do? can i take it all off as one thing and then just bolt it onto the 1400 block? will i need a new headgasket? i have a brand new one for a 1300 sr if that will fit?

what tools do i need and anything to remember when changing it?

cheers

Greg

[Adam]

You'll need a 1400 headgasket, new head bolts, coolant etc.

In terms of flow, mismatched ports is not a good idea.
Have you just bought the carbs? They aint my old ones are they? lol I just sold exactly what you said youve bought.


A 1.4SRi head is best on a 1400 block, and has the right ports for the inlet you have.

[greg1.4]

1400 headgasket? thought it was a gasket to match the head (1300)?

yes, bought carbs last night. boy from maryport sold me them??

will the car run ok with 1400 block, 1300 head, kent ast2 cam, 4 branch manifold and powerflow system? what power should i expect from this?

[Adam]

Its the gasket to match the block.

Any pics of the carbs?

Yeah, probably about 100bhp. It will need setting up tho.

[greg1.4]

http://i118.photobucket.com/albums/o95/Greg_Mcknight/DSC00686.jpg
http://i118.photobucket.com/albums/o95/Greg_Mcknight/DSC00688.jpg
http://i118.photobucket.com/albums/o95/Greg_Mcknight/DSC00689.jpg
http://i118.photobucket.com/albums/o95/Greg_Mcknight/DSC00690.jpg
Greg

[greg1.4]

my dad says i am missing some springs that go on the bolts that hold the carbs to the manifold? where do i get these?

[greg1.4]

how much will a headgasket for a h reg, 1400 spi be??

[Adam]

They look quite tidy.

Yes the locknuts need spring washers on as you dont tighten the carbs tight to the inlet, as the vibration "froths" the fuel sitting inside the carbs.
You have them secure, but not tight.
You can either use spring washers, or rubber washers and cups.

Headgasket is about ?8, you'll need headbolts too which are the same again.
And a torque wrench/angle gauge to tighten the headbolts.

[greg1.4]

cheers mate!

i have hard about putting head bolts to a certain tightness (cant remember what its called?

how do i know when they are tight enough? i have a torque wrench..

Greg

[Adam]

ITs in haynes manual.
You tight each one in turn to the right torque, then you have to angle tighten each one(this is the bolt stretching stage)

[SRI crazy]

why nt just change the cam box to a carbd wan with the manual pump an all on it and it would save the bother of changing the heads lol

[Adam]

Well, to change the cambox you need remove the head anyway,LOL.

[greg1.4]

right i am stuck again.. nearly done though!

i dont know how to get the coil etc working so i can get a spark..

i have a 1400 block now with a 1300 SR head and distributor. i have unplugged my spi plugs for the coil and have got my 1300 SR coil bolted in...

what wires do i need to connect? pictures would really help or for someone to go into a bit of detail and tell me the colour of the wires to join, and where they come from and go??

i noticed the spi loom for the coil had 2 plugs but the SR coil has only got one??

all this help is really appreciated! thanks

Greg

[Adam]

Spi loom is integral with the car loom, one plug for coil, othe for module.
Your 13OO setup should have three wires where it joined the car. Any pics of the coil plugs etc.

[greg1.4]

will get pics tonight.

i just dont know what wires/plugs go where. i have got 2 wires coming from the sr dizzy with a black plug on the end of it.. it went into the bottom of the coil.. so if i do that and have it plugged into the SR coil surely i will not get power to the coil?

and if i plug my big spi plug that used to go to the coil into the coil, then where does the (think its red and black wires) coming out of the dizzy go?

i would even run new wires to the coil and have it on a switch, as i am having it a track car so i have alot of other things on switches..

cheers

Greg

[greg1.4]

still need help on the above,

but i am short of money just nowe and cant afford to put a highlift cam and pulley on at the moment. will the carbs run ok without the cam and pulley? i will get a cam and pulley in about a month or something.. cheers

Greg

[Adam]

The spi coil wires are no good to you, as the spi ECU triggers the spi coil(through those wires)
So just unplug them and tie them aside.
The dizzy triggers a carb coil, so its wires go to the coil.

The engine will run fine with a standard cam if the carbs are setup well.

[greg1.4]

:D

i have went to my car, looked at it and thought why do i need to change heads and coils etc etc...so i thought might aswell try and see if she will go with the normal coil etc but with no injection system/carb.

i was getting any amount of spark and all i had plugged in was the coil/module and the plug that goes to the dizzy... and i was getting a good spark. so why did i need to even think about swapping to a carb ignition setup?

i will be fitting my 40s asap now..

cheers for your help though matey but didnt need it..

Greg

[Adam]

It will spark, but you will have static ignition timing... no advance. So it will run ****e.

[greg1.4]

does a spi distributor not have a advance/retard unit?

so i will need to change the heads... grrrrr

[Adam]

Nope, as the ecu does that. You wont need change heads if you use a 14sr system.

[greg1.4]

balls, will change the heads as i already have a 1300 SR sitting. thanks again for your help mate! spot on!

Greg