Phamspeed uses 304ss, Peak Boost uses 321ss. For turbo manifolds, 321 welded up with 347 filler is the way to go ten times out of ten.-Jeff95_240sx wrote:It took you guys HOW long to come out with that? Several months if I remember correctly. Phamspeed designed and built equal lengths that arent as bulky.
Other than that, it does look good and high quality.
Rick
someone better fill full-race inJeff240sx wrote:
Phamspeed uses 304ss, Peak Boost uses 321ss. For turbo manifolds, 321 welded up with 347 filler is the way to go ten times out of ten.-Jeff
wanna trade jobs? I could do what your doing and you could be like me. ( a forum junky reading about enjuki.)MATT ’BACK’ VASS wrote:hahah dude i forgot my password and i dont think i use the same email address anyways - this new acct has my correct email address - i suck at that whole thing..
FWIW I drove 300 miles to get you guys a clutch only to have the idiot I was getting it from "accidently disco' his phone line"... the drift gods were not with you that weekend.MATT ’BACK’ VASS wrote:6) hope this helps guys, sorry i didn't make top 16 in houston for you all.
its a DPR Stage 5 s13 cylinder head with every thing you can think of done to itget_up_mark wrote:thats an s13 motor you can tell by the three bolts near the spark plug holes on the valve cover. on the s14 there is only 2.
Is this you being a jerkoff?DRIFTEADOR wrote:someone better fill full-race in
some website wrote:Grades 321 and 347 are the basic austenitic 18/8 steel (Grade 304) stabilised by Titanium (321) or Niobium (347) additions. These grades are used because they are not sensitive to intergranular corrosion after heating within the carbide precipitation range of 425-850°C. Grade 321 is the grade of choice for applications in the temperature range of up to about 900°C, combining high strength, resistance to scaling and phase stability with resistance to subsequent aqueous corrosion.
A limitation with 321 is that titanium does not transfer well across a high temperature arc, so is not recommended as a welding consumable. In this case grade 347 is preferred - the niobium performs the same carbide stabilisation task but can be transferred across a welding arc. Grade 347 is therefore the standard consumable for welding 321. (Why I mentioned the 347 filler rod)
Grade 304L is more readily available in most product forms, and so is generally used in preference to 321 if the requirement is simply for resistance to intergranular corrosion after welding. However 304L has lower hot strength than 321 and so is not the best choice if the requirement is resistance to an operating environment over about 500°C.
I think that's enough quoting from Azom.com and Fergusson Metals. And if you're so concerned with Full-Race, just shoot them a link here. But, I assume they've looked over the facts and properties of different metals, and made their choice for a reason (cost is the usual reason). But, judging by the look of the welds, FR uses 321 anyway.-Jeffsome other website wrote:Types 321 and 347 stainless steels offer higher creep and stress rupture properties than Type 304 and, particularly, Type 304L which might also be considered for exposures where sensitization and intergranular corrosion are concerns. This results in higher elevated temperature allowable stresses for these stabilized alloys. The Types 321 and 347 alloys have maximum use temperatures of 1500°F (816°C) for code applications, whereas T304L is limited to 800°F (426°C).
I think you'll get a kick out of this.http://www.aws.org/cgi-bin/mwf...=674395_240sx wrote:Also, fullrace went out and bought those RoboTIG welders...I think they use the Panasonic models but I am not sure, thats why their welds are so freaking overkill.Rick
the peak boost manifolds are 321 with 347 fillerDRIFTEADOR wrote:321 ss is better, I'm not doubting that, the price clearly states it, but maybe overkill for our application. search around and see if you find any unsatisfied full race customers. that's what i'm getting to. here's a few more reads on why 321 is a better metal,
http://honda-tech.com/zerothread?id=449127&page=1
still doesn't mean my 304L manifold is inferior to your 321 that costs twice as much.
matt, what do you guys use?
304L is a different alloy, it's a low carbon 304. That is a much better, slightly more expensive material to make a manifold out of, compared to 304ss. I never called 304L inferior. But, 304L is still not ideal. Nor is 321, but it's closer to ideal.A crazy alloy like Inconel is ideal.. like what SpecialtyZ made for the z32tt.http://www.specialtyz.com/manifold.htmBut.. those make a 321ss manifold look cheap.-JeffDRIFTEADOR wrote:still doesn't mean my 304L manifold is inferior to your 321 that costs twice as much.