Advice on weld-on fittings - steel or alloyweld-on fittings
Posted 03 October 2015 - 01:30 PM
First of all i am a novice when it comes to fabrication and welding. I did have a quick google but the results i got i did not understand, i am learning and not sure who to ask so thought i would throw a topic up here.
I bought a custom stainless intake manifold for my CA18DET. I did not realise at the time of purchase but it does not have sufficient vacuum fittings as the previous owner had binned the idle air control setup (AAC and Air regulator). I want to run this as it will be street driven and occasional track use.
I am making a custom bracket with steel plate to mount the AAC and air regulator (mild steel for bracket). So i don't have to modify the AAC i am planning on using weld-on fittings welded to the bracket and weld on fittings on the stainless manifold.
I don't have the right gear to weld to stainless so I am going to get someone to weld the fittings on for me (not sure who yet but there are a couple of performance shops in the area I can contact when i have all the parts)
I need to purchase weld on barb fittings 4x 3/8" and 1x 1/2" fittings. When i look at the proflow website they have both steel and alloy fittings.
2x of the 3/8" fittings and the 1/2" fitting will be welded to the stainless manifold
2x of the 3/8" fittings will be welded to the mild steel bracket (i beleive the steel fittings are obvious choice for these but want to confirm)
Which ones do I get?
Posted 03 October 2015 - 02:12 PM
with fittings, use alloy fittings on alloy, stainless fittings for mild/stainless.
i am having trouble picturing your setup, post some photo's for better advice
Posted 03 October 2015 - 06:00 PM
Posted 03 October 2015 - 08:04 PM
2x 3/8" vac lines need to go from AAC to manifold and need an extra 1/2" fitting on the manifold for a hose to go to the air regulator
WP_20150718_001.jpg 1.42MB 13 downloads
Posted 03 October 2015 - 08:22 PM
give it a grind and see if it sparks, if no sparks then its an aluminium alloy. im sure theres a better way, but thats what i've always done
Posted 04 October 2015 - 07:36 AM
Thanks for the help and advice, greatly appreciated
Edited by mr_sleeper, 04 October 2015 - 07:37 AM.
Posted 04 October 2015 - 08:07 AM
I found this on the AN thread sizes can I go off this to find right taps or do different fitting manufacturers use different threads?
Or would these metric ones be easier to get taps for?
had a quick look on supercheap website at tap and die set and does not include the AN or metric taps so would need to look around for them
Posted 04 October 2015 - 09:22 AM
If you're tapping threads, the barbs can be stainless, brass, doesn't matter.
Taps are taps, not much to them. there are 3 main kinds, You want the kind with a gradual lead up to the thread cutting. You just buy them as "14mm x 1.25 thread" like you would buying a bolt.
Edited by r0berto, 04 October 2015 - 09:30 AM.
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users