My Welding Pics Thread

[ISL33P]

Well spotted......its the 3rd different rb25 manifold I have seen. More pics of the bellmouths and plenum base welded on during the week.

[mr 32]

do you still use 5 series filler rod on the cast sections or swap over to a 4 seriers?

[ISL33P]

I always use 5, I have used 4 in the past but never really liked it. What are your thoughts on the 4?

I will have some more pics up in a couple of days of the welding I done on the weekend....more of the cast to raw aluminium and it turned out quite well and consistent which is most important.

[dori34]

hey dude, whats changed with the new RB25 manifold design?

[ISL33P]

no change in the design just adapted to suit different runners. This is actually the 5 different type of rb25 runner i have seen but more interestingly the 2nd r33 one.

[mr 32]

I always use 5, I have used 4 in the past but never really liked it. What are your thoughts on the 4?

I will have some more pics up in a couple of days of the welding I done on the weekend....more of the cast to raw aluminium and it turned out quite well and consistent which is most important.

i really only use 5356 which i have had no problems with it, but i havent tried pipe/cast or sheet/cast with it.

ive used 4043 before but thats only good for cast repair,

i might grab 1kg of 4047 and compare it to the 5 series

[ISL33P]

i will try and get the pics up tonight of the two welded with 5356....i have never had an issue with any plenums falling apart because of using 5356

[Roy]

Silly question, would you know if the RB20, RB20 or Rb26 fuel rails are interchangeable? I have an RB26 rail for my RB20 and after having a quick look at it i suspect its not going to work....despite my mates assurance he ran a scummy RB20 rail on his RB26.

One other thing, is there a reason why the runners are perpindicular to the plenum when you are going full custom?

[ISL33P]

For some reason I believe they do but not 100% sure since I usually make my own. I would just see if anyone else can confirm, I think the rb25's are not.

This has been proven over and over to produce the best results in terms of flow and consistency between runners with a correctly designed plenum.

[Roy]

So you make RB20 fuel rails for std manifold? I could modify the std rail but prefer to go aftermarket so that I can use screwed connections and ensure there is no rubber lines under there

[ISL33P]

yes I do but usually only when I make a plenum. I would consider making them as group buy with speedflow style screw on fittings.

[ISL33P]

here's just a couple pics from the weekend

mr 32 - see the integration between cast and raw aluminium using 5356...no problems at all

Edited November 10, 2010 by ISL33P

[kristafa]

looks great! just curious, how you manage to get the torch into tight spots like this? do you pull the tungsten out a fair bit, and wind up the gas flow to shield it more? or any secrets?

i'm also thinking for tighter spots too, like between runners in an ex manifold, etc..

[ISL33P]

I use a 20 size torch....being watercooled it is a lot smaller than the air cooler ones.

I have very rarely needed to extended the tungsten out of the cup or turn the gas flow up when welding aluminium....I usually just crank the amps up. I do though for stainless/mild steel and tight spots.

[STR8E180]

still havent got a water cooling unit for my miller machine yet

where did u get yours from again? i remember u telling me a while ago but i forgot and cant be bothered searching for it

[ISL33P]

pm sent

[ISL33P]

Some progress pics from the weekend. I finished the 2 rb25 plenums.

Next is a 1JZ....

[Craved]

hey Ariel - what do you do to the cast alloy bits before welding in terms of prep? - I always find alot of impurities coming out of casts when welding.

[ISL33P]

They are sandblasted prior to welding. If they are not blasted and you try to weld them, the impurities should only come from the cast and not from the oil on the inside of the runners. If that's what's happening you are using to much amps.

I used to weld them before blasting them but as you can see the result is just fine doing it before and this justifies not having to blast them afterwards as well.

You could ask what type of sand I use to blast them, but then I would be giving away all my little secrets

Ariel

[Craved]

hahaha fair enough

well its either soda or glass bead - as no garnet/crushed glass/oxide based blasting media will give that shine

you've given me enough hints so i should work the rest out myself cheers Ariel.

Chris