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Author Topic: Ramhorn wastegate size  (Read 3549 times)

DSharp

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Ramhorn wastegate size
« on: March 11, 2017, 12:39:11 PM »

Turns out my old wastegate setup won't cut it with all my recent upgrades.  Now the exhaust flows very well and the wastegate just will not keep up.  I have a hy35 and a ramhorn manifold.  I'm gonna cut up my collector and add a large pipe for a big gate.  Question is how big do I go for?  Go ahead and put a 60mm if it fits and be done with it?  I want to be able to dump back in the down pipe and control boost without creep.  Basically I don't want to have to fuck with this car much after this... I just want it to work.  I got a awd dsm that needs to be built, and I don't think I'll care much about the honda once I get into that project.
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carkrazed

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Re: Ramhorn wastegate size
« Reply #1 on: March 11, 2017, 04:29:31 PM »

I don't see why a 38mm wastegate, if placed correctly, wouldn't be big enough.

How is the wastegate setup now? 
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DSharp

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Re: Ramhorn wastegate size
« Reply #2 on: March 11, 2017, 08:36:44 PM »

Decent size turbo making lots of flow at relatively low boost, harder to control than a standard honda civic setup for many reasons I won't go into at the moment.  It's a standard ram horn design, nothing special there. 
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carkrazed

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Re: Ramhorn wastegate size
« Reply #3 on: March 11, 2017, 11:41:33 PM »

Decent size turbo making lots of flow at relatively low boost, harder to control than a standard honda civic setup for many reasons I won't go into at the moment.  It's a standard ram horn design, nothing special there.

Well, if it means anything. I ran an HY35 on a BP, top mount mani with a 44mm wastegate with no issues. I was running like 28lbs though. I could understand getting creep with a 4g63 and hy35 if your trying to run like 8-10 lbs.  Bigger is probably better if that's the case. Ching chong 60mm
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DSharp

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Re: Ramhorn wastegate size
« Reply #4 on: March 12, 2017, 11:57:37 AM »

The 38 used to work great when I had plenty of back pressure in the exhaust and a open dump
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crxvtec91

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Re: Ramhorn wastegate size
« Reply #5 on: March 15, 2017, 11:58:58 AM »

VS racing 44mm gate should be enough. I didnt have issues with the hx35 and a 44mm gate.
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DSharp

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Re: Ramhorn wastegate size
« Reply #6 on: March 16, 2017, 09:23:52 PM »

Im tempted just to jump to the biggest i can fit, im not trying to do this again.  Really just doing it for the sound at this point, open dump sounds so rice
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DSharp

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Re: Ramhorn wastegate size
« Reply #7 on: March 18, 2017, 11:18:27 PM »



Might try a 44mm before i go hack up the manifold for as big dump tube.  Then again i might just put a fork in it and enojy the car at 15 psi spiking to 18 psi boost cut at redline, as it is now.  hell injectors are getting close to 80% as is, so there not much more I can get until id have to buy a bunch of parts anyways.

right now I taper my wastegae duty cycle down to 0 over the last 1,000 rpms or so and it still climbs to 18.  Manifold favors the turbo and now the exhaust flows well... might just accept it and move on.
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DSharp

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Re: Ramhorn wastegate size
« Reply #8 on: April 09, 2017, 09:14:52 PM »

New 44mm gate holds boost perfectly all the way to rev cut.  I might try to tie it back into my exhaust again but with my luck it would make it start to creep.
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