problems with fitting twin 40 carbs...

[greg1.4]

please help. i have fitted my inlet manifold and twin 40 carbs and a 1300 sr head onto a 1400 spi block.. it runs and runs very well but the alternator does not fit the bracket that comes out the inlet manifold. the alternator is too far back from the bracket and when i try and push it in towards the bracket it hits off the engine block..

i also fitted the alternator lowering bracket i got with the twin 40's..

is there something missing or have i done something wrong?

also, my fuel pipes.. i want to run the spi pump.. i have put the feed pipe straight into the 40's and she runs fine but petrol leaks out the bottom of the carbs.. i put a ignition live onto the fuel pump relay so its pumping fuel all the time too. and i have got a pressure reg sitting.. what pressure do i have that at?

what else do i need to do? what about the return? how do i t-piece that back into the tank? please show me pics or explain how i do it.

i am just stuck about the return pipe, i take it the feed pipe will go into the pressure regulator then into the 40's but what do i do with the return pipe?

thanks,
Greg

[Adam]

You need to make an extended bracket(weld two together)

Pressureg set at 3psi on the feed line.
You need to T- the reutrn into the 2nd carb feed line, as the spi pump will just blow the carb needle valve seals.

Leaking out of the bottom of the carbs, the gasket is old/broke that seals the bottom of the fuel bowl.

[greg1.4]

i tried using a cav 2.0 bracket and the alternator fitted but then the belt was far too long?

what belt should i use?

so i have the feed going into the pressure reg, through the 1st carb then into the 2nd andt-piece that into the return pipe?

thanks matey!

[Adam]

I have a pic of my fuel setup somewhere, i'll upload it.

I used a standard 1.2 belt.

[Adam]

Heres my old ones: Return on the 2nd carb, reg on the feed line to the first carb.
http://img.photobucket.com/albums/v86/Nova-crew/P1200002Medium.jpg

[greg1.4]

thanks alot.. thats just what i needed.

will go hunt for a 1200 belt. i will have one lying somewhere.

cheers,
Greg

[Adam]

Fit a switch too, one side to an ignition live, the other to the Black wire at the fuel pump relay.
Then when you switch it, it fires the relay and turns the pump on. It will only work tho if you still have the earth wires bolted to the cam housing.

Its a bit dangerous should you crash or something tho.

[Geth]

I'm in the middle of fitting carbs to my 1300 so thought I'd check what upper alternator bracket was fitted with mine. Turns out it's got a Blue Oval stamp in it :eek: Seems to be exactly the right size though. Not sure what it's off as it came with the carbs but could get a part number if any one wants it.

[Mike]

you can obtain the alternator brackets dead easy off the shelf from tunning.co.uk or what ever the site is

[Geth]

Only the lowering brackets. I was referring to the bracket from the inlet manifold, which on mine appears to be from a ford.

[Paul]

this rocks a memory lol, i used 2 nova ones, bolted them together.

[greg1.4]

still having trouble getting a belt to fit.. its way to slack. i tried a 1.3/1.2/1.4 and no luck.

anyone have any ideas?

cheers,
Greg

[Ash]

Get a pic up if you can. I can't see why not if you have the correct lower bracket and an extended top one.

[Ash]

Turns out it's got a Blue Oval stamp in it :eek:

BURN IT!

[Paul]

BURN IT!

What a useful input that was, still made me chuckle though lol

[Adam]

My 1.2 belt was a perfect fit with the proper lowering mount, and a extended lever(2 nova ones welded together)

[Welsh Dan]

There are actually 2 lengths of alternator belt available for a 1.2, before anyone gets confused at the auto factors :)

[Geth]

I went to my local motor factors yesterday with my original 1.3/1.2 belt and said "I need one of these but about 20mm shorter". He did some key punching on his computer and and managed to give me a belt that was 25mm shorter and one that was 10mm shorter. The belt that was 10mm shorter fits absalutely perfectly so took the shorter one back. No problems as far as I can see.

[Geth]

P.S. It was a real bitch to get the belt to fit. I had to place it over the pulley on the engine and half of it over the pulley on the alternater, then manually turn the engine over until the belt was pulled on to the alternater pulley. Once the belt was securely over both pulleys I still had enough room to make adjustements. So don't give up just because it's hard to fit.

[greg1.4]

i will get pics later.

[Stuart]

ummmmmmm I wouldnt T off the fuel like that, its begging to run the 2nd carb lean.

with a good regulator and decent nick fuel control needles it will be fine with no return (dan and jim dont run returns)

[Adam]

ummmmmmm I wouldnt T off the fuel like that, its begging to run the 2nd carb lean.

with a good regulator and decent nick fuel control needles it will be fine with no return (dan and jim dont run returns) Hmm, but with the spi pump is constantly supplying litres of fuel to the feed line, and the carbs not needing that much fuel, where can the excess go? :confused: The pump only shuts off at 3bar pressure btw.

Imo, with the fuel line being straight, if the 2nd carbs needle valve is open it will fuel fine, as it will flow in a straight line straight to the carb(doesn't want to take a 90deg bend), until the valve shuts forcing the fuel back down the return?

Do Facet pumps run constantly, at a permanent pressure/volume?

[greg1.4]

i have not made a return yet? is it worth it? has anybody had problems with not running a return..

my dad wasnt convinced when i said we need to t the return back in. he said he never used to run returns on his sunbeams/escorts and the escort was running a facet pump on 45's. he said the floats in the carbs should stop the carbs filling with fuel/flooding it..

Greg

[greg1.4]

http://i118.photobucket.com/albums/o95/Greg_Mcknight/P1010063-1.jpg
http://i118.photobucket.com/albums/o95/Greg_Mcknight/P1010062-1.jpg

this is the lowering bracket i got with it.. i think its on the right way. i am sure it can only go on one way anyway..??
http://i118.photobucket.com/albums/o95/Greg_Mcknight/DSC00690.jpg

any ideas? Greg

[greg1.4]

ahhhhhh, is that cav top bracket still not big enough? i might go and join my nova one onto that and get the alternator as far back as i possibly can and fit the belt then??

Greg

[Adam]

Yeah thats the right lowering bracket.
The top lever one looks too short.

Up to you about the return, try it without if you want.

[Geth]

Remember it's not just a case of pushing the alternator as far back as possible because the bottom of the belt will rub on the top of the alternator lowering bracket. It's a very fine balance between going too far and not too far enough.

[greg1.4]

i have got the belt on now..yep i have tried to make the rubbing on the lowering bracket minimum..

i bolted a nova mount onto the cav mount and it did the trick.. cheers