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Search: Posts Made By: .john.
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Forum: Welding / Fabrication
11-09-2010, 03:21 PM
Replies: 8
Views: 1,928
Posted By .john.

Re: Mild before stainless

You can just use the stainless pieces for mockup... Then just break it apart to make changes. Honestly the material cost isnt even worth the effort of making a manifold twice.
Forum: Welding / Fabrication
11-04-2010, 11:16 PM
Replies: 42
Views: 10,943
Posted By .john.

Re: 1986-1991 Rx7 turbo manifold kit.

Wow, lots of reading to do this weekend!
Forum: Welding / Fabrication
11-04-2010, 04:26 PM
Replies: 42
Views: 10,943
Posted By .john.

Re: 1986-1991 Rx7 turbo manifold kit.

We machine mostly 17-4
Forum: Welding / Fabrication
11-04-2010, 02:56 PM
Replies: 42
Views: 10,943
Posted By .john.

Re: 1986-1991 Rx7 turbo manifold kit.

I'm going to do some more research on stainless and get back to this, don't want to say anything stupid haha. I work at a machine shop where we send out stainless parts regularly for heat treating....
Forum: Welding / Fabrication
11-04-2010, 11:43 AM
Replies: 42
Views: 10,943
Posted By .john.

Re: 1986-1991 Rx7 turbo manifold kit.

Ever drilled a piece of stainless and put too much heat into it? It becomes super hard on the surface right?
Forum: Welding / Fabrication
11-04-2010, 10:33 AM
Replies: 42
Views: 10,943
Posted By .john.

Re: 1986-1991 Rx7 turbo manifold kit.

I agree with some of that, but welding too had can indeed heat treat the metal and harden it. Regardless of gas coverage the metal is still reaching a certain temp then cooling very quickly. This is...
Forum: Welding / Fabrication
11-04-2010, 01:39 AM
Replies: 42
Views: 10,943
Posted By .john.

Re: 1986-1991 Rx7 turbo manifold kit.

not sure how the thickness of a metal effects its ability to hold strength at temps... stainless melts just over 2700 degrees, dont think 1600 is a problem. cracking can be from a number of things...
Forum: Welding / Fabrication
11-03-2010, 01:26 PM
Replies: 42
Views: 10,943
Posted By .john.

Re: 1986-1991 Rx7 turbo manifold kit.

All of my rotary manifolds are sch10, who are you refering to as all?

Also still see those wastegates getting very heat soaked in that position. Regardless the welding looks good.
Forum: Welding / Fabrication
11-01-2010, 11:02 AM
Replies: 42
Views: 10,943
Posted By .john.

Re: 1986-1991 Rx7 turbo manifold kit.

No potential issues with wastegate diaphram failures from sitting the heads of the wastegates right on top of the runners?
Forum: Welding / Fabrication
10-26-2010, 12:35 PM
Replies: 6
Views: 5,787
Posted By .john.

Re: anyone know what alloy the valve cover, block, head are made of on a Honda?

^^^^

Agreed, after good prep I've never had any issues welding any Honda alluminum parts. Always used 4043 filler.
Forum: Welding / Fabrication
10-19-2010, 04:31 PM
Replies: 21
Views: 2,982
Posted By .john.

Re: Professional opinion needed: vband wastegate failure

S2000s also have very bad harmonics around cruising rpm 3-4k. You can literally hold the engine at that rpm and watch the whole turbo setup shake itself apart. Not gonna lie, the only two manifold...
Forum: Welding / Fabrication
10-13-2010, 01:04 AM
Replies: 15
Views: 3,705
Posted By .john.

Re: What to do when its time to weld the runners to the collector?

To reduce the possible problems associated with welding the runners, I actually will completely weld each runner before starting the next one. This basically reduces the problem to one runner at a...
Forum: Welding / Fabrication
10-12-2010, 04:37 PM
Replies: 11
Views: 2,164
Posted By .john.

Re: My first turbo manifold !!

Tips:

get a wire wheel or something to clean up the surfaces before welding.
Use less heat or try to get better gas coverage and make sure to stop between passes while staying in that coverage...
Forum: Welding / Fabrication
10-12-2010, 01:45 PM
Replies: 15
Views: 3,705
Posted By .john.

Re: What to do when its time to weld the runners to the collector?

disagree whole heartedly about welding runners in the fixture. Holding the ends builds up stresses in the runners that can cause problems later. I usually just tack each joint in at least 8-10 places...
Forum: Welding / Fabrication
10-12-2010, 01:32 PM
Replies: 11
Views: 2,164
Posted By .john.

Re: My first turbo manifold !!

Do you want real critiquing or just high fives?

Welding looks too hot, undercut and not prepped very well.

But it's a great job for your first time *high five*
Forum: Welding / Fabrication
10-06-2010, 03:37 PM
Replies: 15
Views: 3,705
Posted By .john.

Re: What to do when its time to weld the runners to the collector?

That's the fun part of making manifolds. You have to first decide when all 4 are tacked on which would be the easiest to get to, then weld that one last. Then get creative with your tungsten and pull...
Forum: Honda S2000
09-22-2010, 09:56 AM
Replies: 5
Views: 968
Posted By .john.

Re: tranny

I have few friends using fc trannys for professional drifting. They don't really seem to last much more than a few races. Both cars I know are around 450hp. One is even running an aftermarket gearset...
Forum: Drift Zone
09-22-2010, 09:42 AM
Replies: 51
Views: 12,917
Posted By .john.

Re: **Official Drift Chat**

So it's "dumb" and "crap". ... Very informative lol.
Forum: Drift Zone
09-20-2010, 11:31 AM
Replies: 51
Views: 12,917
Posted By .john.

Re: **Official Drift Chat**

why is it dumb?

I have competed 4 years in formula d and d1 using only welded diffs. Just changed to a kaaz diff this year as they are a new sponsor but would still be welded if not. Yes LSD is...
Forum: Welding / Fabrication
09-14-2010, 01:15 PM
Replies: 9
Views: 1,423
Posted By .john.

Re: quick question for h-t fabbers

Only problem I find with bending tungsten is that's it's very hard to resharpen it after the shank is bent. And if you have some super tight spot and a bent tungsten, chances are you will need to...
Forum: Welding / Fabrication
09-14-2010, 11:45 AM
Replies: 9
Views: 1,423
Posted By .john.

Re: quick question for h-t fabbers

That's the fun part of making manifolds. You have to first decide when all 4 are tacked on which would be the easiest to get to, then weld that one last. Then get creative with your tungsten and pull...
Forum: Forced Induction
09-07-2010, 01:18 PM
Replies: 22
Views: 10,346
Posted By .john.

Re: Custom Sidewinder Manifold, 6262SP Build S2000

If you're refering to the dark weld at the base of the collector it's from welding the inside of that joint after welding the outside. It just loses it's color from the lack of argon on the outside....
Forum: Drift Zone
08-31-2010, 11:02 PM
Replies: 29
Views: 26,186
Posted By .john.

Re: setting up s2000 for drift?

You serious? Rsr campaigned their car for almost 3 years, and steph ran his car for almost 3 seasons as well.

In d1 Ken maeda ran a supercharged s2000 for 2 years as well...
Forum: Drift Zone
08-31-2010, 11:54 AM
Replies: 29
Views: 26,186
Posted By .john.

Re: setting up s2000 for drift?

None of these answers seem to be from first hand experience...

setting up a car for Drifting is alot like grip. The car needs to have a nuetral feel. A slight natural oversteer is helpful but not...
Forum: Honda S2000
08-25-2010, 12:42 PM
Replies: 22
Views: 16,705
Posted By .john.

Re: Brian crower stage 3 cam test

Was looking at the wrong graph haha. Didn't ips offer an f20 cam? Or was that just in development?
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