Re: carbs

Miniswift on Sat Dec 03, 2011 9:29 pm

Hi,

Following is how my cylinder head has been modified.

You can see the side of head has been milled off and TIG welded.
Then individual inlet has been made.

So I did need to do anything to injection holes.
You will need to make plugs to block your holes and may be use silicon to fill it.
White plug you see is connection for mk1 Dizzy. I have fitted wiring as yet!

Cheers
Atchi

dominator on Sat Dec 03, 2011 10:47 pm

The white plug just happens to be hangin like that Laughing

You will have to plug it up, some sort of bung, rubber, cork that sort of thing, or you could just use some suitable mastic
I didnt split the carbs, I made the mani to suit, it wasnt that far out

leachy on Sun Dec 04, 2011 12:50 pm

So could i just squirt aload of tiger seal in the holes it drys like hard rubber i used it 2 bodge up an old set of sloppy engine mounts once b4 i bought a solid set.

leachy on Sun Dec 04, 2011 12:53 pm

o and thaks alot 4 the crash course in fitting carbs guys without ur help i would av never been able to understand how they work or how to fit em much appreciated Very Happy

gtpswift on Sun Dec 04, 2011 1:58 pm

you will need something that is resistand to petrol otherwise it will dissolve and probably glue your valves together or something.
The right thing to do will be to have some bungs machined up out of brass, copper or aluminium or similar and bonded in with loctite or similar. make sure they can be removed without damage otherwise when you decide to remove the carbs for efi you'll have to replace the head.
GTP

leachy on Mon Dec 05, 2011 4:24 pm

could i just leave my injectors and fuel rail on and just plug it up. also would i get rid of the ecu and if i do what would determine where the limiter is? and if i leave it in is there n e point in having the chip fitted?

Miniswift on Mon Dec 05, 2011 5:54 pm

Hi,

I don't know what else is controlled by ECU in mk2 Gti onwards.
If you have mk1 Gti dizzy, as long as fuel pump is working with correct fuel pressure(3-4psi) your car will be fine.
Mk1 Gti ECU controls fuel pump, injection timing and rev limit. So without ECU, your right foot is limiter for your revs.

Ask machinist nicely, and they should be able to make you bung then Loctite in. I would use JB weld but this will be more permanent than Loctite.

Cheers
Atchi

dominator on Mon Dec 05, 2011 6:10 pm

leave the ecu in as it cuts the fuel pump incase of an accident
hook up a rev limiter to the coil if your worryed, iv no doubt your cams will run out of puff way before the 8600 limit if they are fast road, but you never know what will happen

leachy on Mon Dec 05, 2011 7:11 pm

dominator wrote:leave the ecu in as it cuts the fuel pump incase of an accident
hook up a rev limiter to the coil if your worryed, iv no doubt your cams will run out of puff way before the 8600 limit if they are fast road, but you never know what will happen

I woldnt have a clue how to do that, didnt even know u could Embarassed

leachy on Mon Dec 05, 2011 8:25 pm

Miniswift wrote:Hi,

I don't know what else is controlled by ECU in mk2 Gti onwards.
If you have mk1 Gti dizzy, as long as fuel pump is working with correct fuel pressure(3-4psi) your car will be fine.
Mk1 Gti ECU controls fuel pump, injection timing and rev limit. So without ECU, your right foot is limiter for your revs.

Ask machinist nicely, and they should be able to make you bung then Loctite in. I would use JB weld but this will be more permanent than Loctite.

i dont even know n e machinists or know where to start looking. . . . . . !

Cheers
Atchi

dominator on Mon Dec 05, 2011 10:04 pm

It cuts the spark instead of cutting the fuel to make a limit
Just a simple way of doing it
Try yellow pages for a machine shop Razz