tig welding

frank said:
i would never attempt to weld a fuelrail personally azzy, especially when the CGA topfeed rail is such an easy option
Click to expand...

I agree! top feed gives you so many more options in the future also.

I cut and shut the CG and CGA inlet mani to retain the CG throttle body in stock position.
imag0294-medium-jpg.20498


imag0295-medium-jpg.20499
 
Noddie said:
I agree! top feed gives you so many more options in the future also.

I cut and shut the CG and CGA inlet mani to retain the CG throttle body in stock position.
imag0294-medium-jpg.20498


imag0295-medium-jpg.20499
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I know what u mean but just a thought of using sr20 rails for 370cc injectors for boost as in past I had them


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Azzydot said:
and how did weld come out like ?
Click to expand...
came out as everyone suggests. a piece of red hot steel with welding rod attached. pile of aluminium on the floor!

Volkswagen have apparently designed a "new" welding technique though and they can stick aluminium to steel. they use the technology on their eco cars like the UP.
 
CoV said:
pink USA Ga16 are 185cc, i assumed the black slenderUK GA16DE would flow the same.

Personally I would put SR20DE in minimum. Melting engine parts is never fun.
Click to expand...
UK spec black ones are 198cc so bit more ceiling room with them
 
frank said:
ok for low boost, 80%+ duration is far from ideal eh, no point spraying fuel at a closed valve :)
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Because the inlet valve is only open for 80% of the duration of the intake cycle? At least I'll be alright with em at only about 5psi haha. I HAVE heard of a 230cc colourless injector that might be USDM. TBH I thought the pink 185cc injectors were off the JDM GA15DE motor...
 
CoV said:
Is 198cc proven?

Seems odd they fitted higher flow to a lower spec engine.
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Pinks were on the Jap GA15, Blacks on the UK GA14 and GA16 (probably same on GA14 for standardisation more than anything else)
And I think those are the specs quoted by Nissan
 
Enuo said:
Because the inlet valve is only open for 80% of the duration of the intake cycle? At least I'll be alright with em at only about 5psi haha. I HAVE heard of a 230cc colourless injector that might be USDM. TBH I thought the pink 185cc injectors were off the JDM GA15DE motor...
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1.3 cams are 222 deg eh andy, so 720/222 is the open period ?
 
Enuo said:
(Confession: I have NO clue about cam duration haha:confused: )
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heh :) the inlet valve is only open on the intake stroke basically eh andy, then closed on the other 3 strokes.
so an injector only has a fraction of the cycle to spray the fuel into the port (tho the CG,s batch fire on startup/cranking apparently)
 
frank said:
heh :) the inlet valve is only open on the intake stroke basically eh andy, then closed on the other 3 strokes.
so an injector only has a fraction of the cycle to spray the fuel into the port (tho the CG,s batch fire on startup/cranking apparently)
Click to expand...
Yeah I know that much and that cams run at twice the crank speed, its the 720/222 business that confuses me. Dunno what to make of it, I was always lazy and used cams suggested to me, never bothered to learn about them :(
 
CoV said:
pink USA Ga16 are 185cc, i assumed the black slenderUK GA16DE would flow the same.

Personally I would put SR20DE in minimum. Melting engine parts is never fun.
Click to expand...
i always think if you need the bhp you aim for go a bit higher cc injectors it's more safer and upgraded later for furture


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Azzydot said:
i always think if you need the bhp you aim for go a bit higher cc injectors it's more safer and upgraded later for furture


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Click to expand...


370cc will be fine Azzy and give you headroom for a similar setup to Paul, (a.k.a pollyp).
 
Azzydot said:
Can I get a shock if I holded my work in place and touched with glove ?


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Click to expand...
If your gloves were fingerless and you forgot to attach the earth clamp to the work piece then yes you could get a bit of a belt. But as long as you follow a safe working procedure then you'll have nothing to worry about.
 
Enuo said:
If your gloves were fingerless and you forgot to attach the earth clamp to the work piece then yes you could get a bit of a belt. But as long as you follow a safe working procedure then you'll have nothing to worry about.
Click to expand...
Right I will use a ground clamp and gloves and give my mates mig a go and my tig and vs it with same metal and see wat comes out better,



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Azzydot said:
Right I will use a ground clamp and gloves and give my mates mig a go and my tig and vs it with same metal and see wat comes out better,



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Click to expand...
If the work isn't earthed you won't be able to strike an arc, so using the earth clamp is pretty much a given mate
 
Azzydot said:
Also my tig is a dc inverter can I use plasmer cutter on mines ?


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Click to expand...
Plasma cutter requires a roughly 4bar compressed air supply. What you can do is ramp the amps right up so you punch straight through, and it can be effective on thinner sheet metal, but on thicker stuff (3mm+) you'll get too much heat bleeding into the metal and risk distortion
 

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