|
Home | Rules & Guidelines | Register | Member Rides | FAQ | Members List | Social Groups | Calendar | Mark Forums Read |
Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series. |
|
Thread Tools | Display Modes |
08-15-2011, 10:23 AM | #1 |
Zilvia Member
Join Date: Feb 2009
Location: Savannah GA/SC
Age: 31
Posts: 157
Trader Rating: (5)
Feedback Score: 5 reviews
|
SR20 Exhaust manifolds that dont crack?
What exhaust manifolds are people running that actually do their job and don't fall apart? I've tried 3 different manifolds now with pretty much the same results.
Heres my Mazworx manifold after 3 months / 6000 miles. |
Sponsored Links |
08-15-2011, 11:55 AM | #4 |
Zilvia Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 200
Trader Rating: (5)
Feedback Score: 5 reviews
|
Those are some amazing cracks. Does your car sit outside? What do your EGT's look like at peak?
__________________
1993 Nissan 240sx - SR20VET VVL, GT30R || [email protected] |
08-15-2011, 02:03 PM | #5 |
Zilvia Junkie
|
full race manifolds are really nice and youll keep your topmount. my buddy has one and it works amazingly, i have mine sitting at home waiting to be installed =]
__________________
'92 240sx w/'93 SR Blacktop /// '94 RX7 FD3S /// '11 370z RIP |
08-15-2011, 02:23 PM | #6 |
Zilvia Member
|
The mainfold is not always the problem. What does your downpipe setup look like? Does it hang below the frame rail? Does it have a flex section? Because any of your exhaust scrapping would put a strain on it since the whole leverage factor. Then also the egt plays a factor
Sent from my T-Mobile myTouch 3G Slide using Tapatalk |
08-15-2011, 03:25 PM | #7 | |
Post Whore!
Join Date: Dec 2004
Location: Poconos, PA
Age: 36
Posts: 8,030
Trader Rating: (58)
Feedback Score: 58 reviews
|
Quote:
__________________
Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20! Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy |
|
08-15-2011, 04:57 PM | #8 |
Man w/ CTSV & a Car Seat
|
Funny how this came up...my Mazworx manifold did the same shit around the WG neck. Thats the funny shit too, it cracked on a spot that shouldnt have cracked since there really isnt any stress on it other than having a MV44 wastegate and open dump tube on it. My DP had a flex pipe on it. I didnt even know it was cracked since it was wrapped. The guy I just recently sold it too noticed the soot burn on the wrap under the flange and peeled it back.
I'm still pissed about since I spent $800 on it with the same result as a damn Ebay one. Atleast if the Ebay one cracked, i wouldnt be so pissed since i would have expected it to crack. Send it back to Mazworx and have them reweld it. Considering its cracking on the weld instead of the metal, I'd blame the welds. |
08-15-2011, 10:36 PM | #9 |
Post Whore!
Join Date: Dec 2004
Location: Poconos, PA
Age: 36
Posts: 8,030
Trader Rating: (58)
Feedback Score: 58 reviews
|
Without a doubt that is the issue. It's one thing if the pipe cracks, another if it breaks exactly along the weld
__________________
Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20! Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy |
08-15-2011, 10:48 PM | #10 |
Zilvia Junkie
Join Date: Jun 2011
Location: Where the wild things are, FL
Posts: 327
Trader Rating: (4)
Feedback Score: 4 reviews
|
Mark should be able to fix it no questions asked. The oem one should do wonders but what can you do if you have a top mount setup... You need a tubular piece.
My isis bottom mount is still holding up just fine! |
08-15-2011, 10:53 PM | #11 |
Zilvia Addict
|
tube exhaust manifolds are pretty thin, unless you use the 1/8 inch kind that they use on log type manifolds. you have to use a really good design(very effective), brace to hold the turbo`s weight. i used to race a car with a big heavy turbo on a full race tubular exhaust manifold that never cracked because of the effective triangulated design brace that it had. it was not a race car, it was a daily driver honda civic with a gt35r making 600+WHP. the manifold is not designed to hold the weight of the turbo, you have to have a brace.
|
08-16-2011, 01:28 AM | #13 |
Banned from the Marketplace
Join Date: Mar 2007
Location: Planet Earth
Posts: 768
Trader Rating: (21)
Feedback Score: 21 reviews
|
Mine don't crack and are backed by a warranty. Also having a flexpipe on the downpipe helps. Check out my work. I've sold a couple manifolds to people on here
http://zilvia.net/f/gb-forced-induct...0-gtx3071.html Pm me if you have any questions |
08-16-2011, 09:59 AM | #14 | |
Post Whore!
Join Date: Dec 2004
Location: Poconos, PA
Age: 36
Posts: 8,030
Trader Rating: (58)
Feedback Score: 58 reviews
|
Quote:
__________________
Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20! Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy |
|
08-16-2011, 08:31 PM | #16 |
Post Whore!
Join Date: Dec 2004
Location: Poconos, PA
Age: 36
Posts: 8,030
Trader Rating: (58)
Feedback Score: 58 reviews
|
I know where I"m pointing people now for Top Mount setups
__________________
Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20! Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy |
08-17-2011, 10:00 AM | #19 |
Post Whore!
Join Date: Jan 2008
Location: Fairfield, OH 45014
Age: 38
Posts: 2,804
Trader Rating: (12)
Feedback Score: 12 reviews
|
Mazworx does warranty their manifolds.
Contact them regarding your issue.
__________________
Contact: Phone - 513-874-2508 AIM - ZLR0bert Email - [email protected] Zerolift facebook - http://www.facebook.com/Zerolift |
08-24-2011, 03:47 PM | #20 |
Zilvia Member
Join Date: Aug 2011
Location: USA/Australia/Japan
Posts: 223
Trader Rating: (2)
Feedback Score: 2 reviews
|
My understanding is that some exhaust manifolds are not designed to withstand the full weight of a turbo/elbow/downpipe configuration. How low is your 240 and have you ever had any scraping issues with any of your exhaust components?
|
08-25-2011, 04:04 PM | #21 |
Zilvia Member
Join Date: Oct 2006
Location: portland
Age: 33
Posts: 205
Trader Rating: (3)
Feedback Score: 3 reviews
|
The DOC Race ones are really nice. In reality though, all SS manifolds will crack in time no matter how good of quality SS or welds there are. Its the flaw of SS manifolds. You can always add bracing to help support the turbo and downpipe.
DOCRACE.COM | CUSTOM TURBO MANIFOLDS | PERFORMANCE PARTS |
08-26-2011, 02:13 PM | #22 |
Nissanaholic!
Join Date: Dec 2003
Location: In a place, near a river, over a lake
Age: 34
Posts: 2,415
Trader Rating: (22)
Feedback Score: 22 reviews
|
I've had two Tomei's crack in two different locations... Here is the most recent failure. Before anyone assumes insanity, the cracks were in completely different areas. The first was within the divider at the collector and now these at the runners. Tomei replaced it once, I'm currently waiting to repair this one in an effort to see if they'll replace this one too. for reference, I have a flex section on the vertical drop, polly hangers, poly engine/trans mounts... this shouldn't happen.
What troubles me about manifold failures is that they often seem to be within the weld, as if it split apart. Correct me if I'm wrong (which I'm not) but shouldn't the weld be as strong as the surrounding material; of course if welded correctly? My understanding is that the surrounding material should fail before a quaility weld should. WHY do almost all SS manifolds have little bitty tiny TIG welds that almost look fused with no filler rod? Why not triple pass that shit; lets see a broken tube FOR ONCE!
__________________
Fu*king ginger bread man stole my wallet... SHIFTlock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson |
08-26-2011, 09:11 PM | #23 |
Leaky Injector
Join Date: Mar 2009
Location: clarksville IN
Age: 46
Posts: 83
Trader Rating: (2)
Feedback Score: 2 reviews
|
the weld itself should be STRONGER than the metal around it for the most part. If the weld breaks, its a bad weld. The metal should give around the weld before the weld itself does.
Pictures 1,2, and 3 all look to be broken along the edge of the weld, except one spot that crossed. Meaning the metal failed, not the weld. Pic 4 is an obvious weld fail. Stainless steel is extremely brittle, it doesn't have nearly the "give" to it of regular steel. Probably one reason it cracks so easy, what with the weight of a turbo sitting on it and all. There's a lot of leverage at work hanging a turbo off the side of the engine, get some heavy duty bracing in there to support it, should help a lot. |
08-27-2011, 02:47 PM | #24 |
Nissanaholic!
Join Date: Dec 2003
Location: In a place, near a river, over a lake
Age: 34
Posts: 2,415
Trader Rating: (22)
Feedback Score: 22 reviews
|
Before agreeing with you I think its important to consider that the starting point of the failure has significantly more to do with the diagnosis rather than pictures of the most visible damage. I wonder where it gave first... We're all pretty aware of the weight of turbo system here and the likeliness of damaging stress it can induce on a manifold, so no need to reiterate what caused it.
__________________
Fu*king ginger bread man stole my wallet... SHIFTlock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson |
08-28-2011, 02:15 AM | #25 |
Leaky Injector
Join Date: Mar 2009
Location: clarksville IN
Age: 46
Posts: 83
Trader Rating: (2)
Feedback Score: 2 reviews
|
Well sure, but its damn near impossible to tell from the closeup pics where the likely starting point was. Anybody with much welding/fabrication experience could look at them and figure that out fairly quickly though I should think. From what little I can see, it looks to me like there just wasn't enough filler put in. The weld cut into the steel slightly, and without the right amount of filler was undercut on either side slightly. Therefore, the steel in those places was thinner than in other, and more prone to failure. Concave weld beads is what makes me lean towards that conclusion, a proper weld should be more convex. Now I'm no master fabricator by any means, but I did do steelwork and welding for a living for quite a few years. Better pics would go a long way towards figuring it out, but in this case its already broken so a bit late. Too much emphasis on pretty welds and not enough on strong ones imo.
|
08-28-2011, 09:09 AM | #26 | |
Post Whore!
Join Date: Dec 2004
Location: Poconos, PA
Age: 36
Posts: 8,030
Trader Rating: (58)
Feedback Score: 58 reviews
|
Quote:
Like above, lack of bracing is another thing that so many skip. I know when we're hanging T4+ turbos off a v8 setup, we always try to brace it with a hard/metal brace to the block (or to a chassis point if flex sections or motor plate cars) to help alleviate stress.
__________________
Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20! Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy |
|
08-28-2011, 09:11 AM | #27 |
Post Whore!
Join Date: Dec 2004
Location: Poconos, PA
Age: 36
Posts: 8,030
Trader Rating: (58)
Feedback Score: 58 reviews
|
Another thing I've often wondered, is if the flange itself is partly responsible for the failure as well....it seems like manifolds with split ports seem to have less issues than ones using a solid piece btween them all.
Also curious as if the Tomei piece is 100% stainless on the flange as well, or if it's regular steel. To me if it was all stainless, that may lead to failure as well.
__________________
Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20! Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy |
08-28-2011, 04:30 PM | #28 | |||
Nissanaholic!
Join Date: Dec 2003
Location: In a place, near a river, over a lake
Age: 34
Posts: 2,415
Trader Rating: (22)
Feedback Score: 22 reviews
|
Quote:
Quote:
Quote:
__________________
Fu*king ginger bread man stole my wallet... SHIFTlock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson |
|||
08-30-2011, 10:42 AM | #29 |
Zilvia Member
Join Date: Feb 2009
Location: Savannah GA/SC
Age: 31
Posts: 157
Trader Rating: (5)
Feedback Score: 5 reviews
|
Update from my end...
My downpipe, Nor any part of my exhaust has ever hit the ground. The lowest point is the kit on the car, and I'm just not baller enough to let this kit touch the ground. I don't have any bracing on my turbo, and never have. I don't see how bracing the turbo is going to keep the wastegate tube/welds from failing. I shouldn't have to brace the wastegate on a 700 dollar "top of the line" manifold anyways. Mazworx did warranty the manifold, but I had to ship it at my cost. They said turn around time should be 2 weeks. However, anytime I ever hear 2 weeks from a shop I smell bullshit. Monday the 5th is their deadline, and as Ive yet to receive an email, phone call, or any word at all. I doubt it will be on time. I gotta say, So far I'm not impressed by Mazworx regardless of how their shop car preforms. Issues thus far. 1. They straight out lied to me about the fitment of the manifold. I asked and was told 3 times before ordering this manifold that it had ZERO fitment issues on RHD cars. Welp, That simply isnt true. You have to move the heater lines for the downpipe to clear, and even then the rubber hoses sit MAYBE 1/4 inch away from it. You simply can not route them out of the way due to where they connect through the firewall. When I called and told them about this, they simply said "just take out the heater lines". 2. After the manifold failed they refused to pay to ship the manifold to them. I can provide proof that the manifold was used less then 3 months. My car was on the dyno 05-27-11, This is the first time/day this manifold was used. I started to hear an exhaust leak I thought to be a failed gasket around the end of last month. The manifold then totally failed 08-10-11. Their excuse is I bought the manifold back in January which is true, However until 05-27-11 it sat in a climate controlled room/shop not even bolted to engine. The bottom line is, Their manifold failed due to quality control/design flaws. The customer service I have received sucks. They wouldn't even work with me over a 25 dollar shipping charge. Let alone the 80 dollars in gaskets I have to buy again. I will not recommend any parts or service from Mazworx after this. Which is disappointing as I was planning on buying the z32 trans adapter kit, and the solid axle conversion for our cars. Sorry for the long post, Just felt the need to vent that out there. |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|