Originally Posted by y8s
(Post 389538)
because your prostate is sensitive?
because that bellmouth will impede flow. you'll get turbulence coming out of the turbine. |
Originally Posted by paul
(Post 389584)
So with my 7psi actuator (that is most likely blowing open from the inside) I should make over 200ft-lbs of torque at 3050rpm instead of 3150 if I get a separated gas design? Sweet. Tim, get on it.
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Damn it I forgot my sarcasm meter
http://doesitallmatter.files.wordpre...casmmeter2.gif |
shhh he was going to build it !!
tim, if you tell me the centerline radius of the pipes you can get and wall thickness and such, I can just CAD up my absurd pipe for paul's extra 100 rpm. perhaps there could be a little comparo at the dyno again. whee. |
Originally Posted by TurboTim
(Post 389856)
Isn't this what the new BEGI standard pipe is? I guess just not 3"?
Stephanie |
Originally Posted by Stephanie Turner
(Post 389940)
The vent tube on the BEGI-S pipe is now 6.5" to 7" long.
Stephanie |
Originally Posted by y8s
(Post 389906)
shhh he was going to build it !!
tim, if you tell me the centerline radius of the pipes you can get and wall thickness and such, I can just CAD up my absurd pipe for paul's extra 100 rpm. perhaps there could be a little comparo at the dyno again. whee. I use 6" centerline 3" pipe, .060 wall. I use the usual pipes everyone else can get. 99% of the stuff is from Vibrant, other stuff is from Burns if vibrant/keystone is out of stock. You can get the centerline radii of the smaller pipes off vibrants website. EDIT: If I were building a downpipe for my personal car, I'd be a bellmouth and no because it could be easier. When you take a 3" pipe and make it oval, it's about ~2.25" wide anyway and that 2.25" edge of the oval is centered over the turbine outlet. It's not like a 3" pipe is right over a 2.25 hole and there is no taper. So at least half of the turbine outlet is a smooth transition, the side against the oval edge of the bellmouth. The other half of the oval bellmouth is there for the rest of the exhaust and WG gasses to GTFO. |
ok simpler idea then.
can you weld a divider into the oval? |
Originally Posted by y8s
(Post 390027)
ok simpler idea then.
can you weld a divider into the oval? So yeah, I can weld a divider into the oval. The customer is always right. The downpipe at the dyno day will not have a divider. IF I were to do a divider, it'd be a burns transition cut in half. |
Originally Posted by TurboTim
(Post 390036)
IF I were to do a divider, it'd be a burns transition cut in half.
Probably easier to do that welding it into the turbine housing, as long as you don't warp it, and if you have that available to work on. That's what was done on SCC's project Silvia Disco Potato. |
Update.
I spent yesterday removing the twins and making this other stuff fit (and I only forgot to tighten one thing! woohoo). I ported the wastegate on Paul's donor 2560; the spring pressure is 8psi using the garrett wastegate actuator. It spools quicker than the twins and the exhaust is louder. I am running the same tune so far as the twins, I assume that will probably change. But so far so good. I will aim for at 14-14.5psi at the dyno day to try to accurately compare JohnDoe's SGDP dyno plot posted earlier. The orange discoloring on the manifold is the paint I didn't remove from the weld elbow. Before: http://www.inoneear.com/outtheother/...twinsfront.JPG After: http://www.inoneear.com/outtheother/...wbegifront.JPG Close up: http://www.inoneear.com/outtheother/...rdflowbegi.JPG |
2 Attachment(s)
I made 264rwhp @ 12psi on my first run, 268@ 13psi on the 5th run with noticeable heat soak (notice spool difference). Peak boost was 14psi, dropping off around 5000rpm.
John Doe's was 14.5psi at some point. I am not sure if he was able to hold it to redline/hp peak. I sent him a PM to find out. Big spool difference compared to the cast BEGI/SS SGDP combo. For sale ad coming soon after I get info from JohnDoe and my datalogs to be specific about spool rpms, etc. |
damn, that's awesome Tim. Any plans for us 1.6 guys?
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I'll build whatever.
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