Originally Posted by sixshooter
(Post 1182720)
I have still never seen a 816.8 at 28.5psi dyno sheet but only a 616.8 dyno sheet at 27.5psi. And I will call bullshit from the rooftops that he picked up 200hp at the same rpm by adding 1psi.
And I've met the owner. He's a nice guy but he knows "Jacques Merde" about his cars. He pays a shop to do whatever and call him when it's done. That's fine, but I'd rather give props to the guy that built it. What is odd is the that nitrous will make more power on boost than naturally aspirated. So I would really think they would want to confirm that shit and not just rely on estimation. If it was really a 200 shot it would probably result in well over 200hp gained. |
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Same guy has a street MSM with a really big turbo and tubular manifold that supposedly made around 425whp or something. It looks possible until you realize it has a stock 6-speed.
Attachment 130018 Attachment 130019 Attachment 130020 Attachment 130021 Attachment 130022 |
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I mean you can make that power on a dyno with a 5 speed. Its gonna be real damn hard to break 5th in a 6 speed (or 4th in a 5 speed).
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I guess you are right. I just thought it sounded implausible at the time.
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Originally Posted by Leafy
(Post 1192251)
I mean you can make that power on a dyno with a 5 speed. Its gonna be real damn hard to break 5th in a 6 speed (or 4th in a 5 speed).
Its also about how power comes on.... big turbos are surprisingly easy on drivetrains compared to a smaller turbo running the same power that comes on like its on a switch. I.e. if you have a delta of 250ftlbs surging over a few hundred RPM when compared to normal loads, your going to have some problems, be it tires or drivetrain. |
There's no gears to strip off in the 1:1 ratios. 3rd in the 5 speed and 4th in the 6 speed are just the weakest gears in the set, thats why they break. It doesnt matter how abruptly the power comes on, its all about the torque being pushed through the gears causing them to fatigue fail.
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I'll add to the DIY thread here.... Im Hella Busy.... lots on the go. The Miata manifold market is loving my work... I have a few hotside kits with exhaust to finish and then I have 2 more manifolds and downpipes as well as an intake manifold to build.
https://farm8.staticflickr.com/7579/...8b21f30a_z.jpgMiata hot side setup by HellaFab, on Flickr https://farm9.staticflickr.com/8582/...95df93ee_z.jpgMiata hot side setup by HellaFab, on Flickr https://farm8.staticflickr.com/7466/...79fed5e8_z.jpgMiata hot side setup by HellaFab, on Flickr https://farm8.staticflickr.com/7545/...8a9c54a1_z.jpgMiata hot side setup by HellaFab, on Flickr https://farm9.staticflickr.com/8663/...de793b90_z.jpgMiata hot side setup by HellaFab, on Flickr So much argon, so little time. |
Originally Posted by Leafy
(Post 1192655)
There's no gears to strip off in the 1:1 ratios. 3rd in the 5 speed and 4th in the 6 speed are just the weakest gears in the set, thats why they break. It doesnt matter how abruptly the power comes on, its all about the torque being pushed through the gears causing them to fatigue fail.
There has to be a "gear" of some sort, but the ratio is 1:1 with equal amounts of teeth. |
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Originally Posted by shlammed
(Post 1192662)
There has to be a "gear" of some sort, but the ratio is 1:1 with equal amounts of teeth. i made some fender braces Attachment 184526 Attachment 184527 |
Different colors=different bracing characteristics. Your car is gonna warp!
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A little ashamed posting this below hellafab stuff but here are some pictures of my recent manifold build:
http://i60.tinypic.com/2j3ji3n.jpg http://i61.tinypic.com/33jqza0.jpg http://i60.tinypic.com/2nsuft0.jpg http://i61.tinypic.com/30cak9k.jpg http://i59.tinypic.com/3160o6v.jpg |
It may not be Hellafab, but Hellafab had to start somewhere. Keep it up. A lot of us who can't fab anything at all like this, whether because of lack of tools, or talent, or both, like to see creations by mere mortals :)
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Originally Posted by Mobius
(Post 1193466)
It may not be Hellafab, but Hellafab had to start somewhere. Keep it up. A lot of us who can't fab anything at all like this, whether because of lack of tools, or talent, or both, like to see creations by mere mortals :)
Next project will be back braces for the ultrashield seats I bought. Hi_I'm_Sean cut me some pieces and tubing so I can match what he did. Sadly the TIG I used is back in portland so these will be welded with my HF shitbox. |
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he's absolutely right, don't be ashamed man, if it works and doesn't break then it's something to be proud of as a 1st manifold
here was my 1st one as well to make you feel better: Attachment 184509Attachment 184510Attachment 184511Attachment 184512Attachment 184513 Design similar to yours :) |
Originally Posted by 18psi
(Post 1193468)
he's absolutely right, don't be ashamed man, if it works and doesn't break then it's something to be proud of as a 1st manifold
here was my 1st one as well to make you feel better: http://i54.photobucket.com/albums/g9...3091808-00.jpghttp://i54.photobucket.com/albums/g9...3091628-02.jpghttp://i54.photobucket.com/albums/g9...ntitled2-1.jpghttp://i54.photobucket.com/albums/g9...7091549-01.jpghttp://i54.photobucket.com/albums/g9...7091546-00.jpg Design similar to yours :) Did you ever end up using a turbo crane or anything to take stress off of the manifold? Did it ever break? |
Curly built one and has pictures on here somewhere.
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Originally Posted by Mobius
(Post 1193471)
Curly built one and has pictures on here somewhere.
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Originally Posted by hi_im_sean
(Post 1192675)
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Originally Posted by aidandj
(Post 1193470)
Pretty sure I ran across yours somewhere along the way in my research. Wayne_curr, wittyworks, and sturovo were pretty much the main resources. They have some incredibly helpful stuff out there.
Did you ever end up using a turbo crane or anything to take stress off of the manifold? Did it ever break? Never broke. What I did have a serious problem with though, was flange warping. Both the turbo and head flanges warped twice. I re-surfaced them and they still warped again. No idea why. Bought the flanges from Weirtec, they were 3/8 iirc, guess I shoulda gone 1/2 |
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