Dual 44 to a single 60 wastegate switch opinions
#1
Dual 44 to a single 60 wastegate switch opinions
My new Xcessive lim doesn't clear my turbo and when I put a spacer flange on the turbo manifold, the turbo is touching the chassis
Looks like a new manifold will be the route to go but while I'm at it I want to replace my dual 44 venting out wastegates to a single 60 re-routed wastegate. The other option is to plumb the 44s back but it is more difficult to do.
The main reason for the change in wg configuration is the noise. It is fun on short accelerations but a headache on longer drives.
My turbo is a GTX35R. Would there be boost creep issues or other issues like decreased response with a single 60 wastegate?
Looks like a new manifold will be the route to go but while I'm at it I want to replace my dual 44 venting out wastegates to a single 60 re-routed wastegate. The other option is to plumb the 44s back but it is more difficult to do.
The main reason for the change in wg configuration is the noise. It is fun on short accelerations but a headache on longer drives.
My turbo is a GTX35R. Would there be boost creep issues or other issues like decreased response with a single 60 wastegate?
#2
Banned. I got OWNED!!!
First problem I see is the fact that you're going to a larger single wastegate, which actually handles power less effectively.
This is a quote from D-Series (Honda) forum:
Larger wastegates are less prone to boost creep.
More info from Turbosmart here: Technical Articles | Wastegate Myths | Turbosmart USA
Why don't you just route your wastegate dump tubes back into your exhaust? Am I the only one running stacked ceramic mufflers around here?!? Noise should be EASILY solvable on a rotary...thicker wall piping helps with resonance too.
This is a quote from D-Series (Honda) forum:
"Wastegate sizing
One of the more popular misconceptions about wastegate sizing is; the more powerful the engine, the bigger the wastegate is needed.
This guide indicates the right size of wastegate:
big turbo/low boost = bigger wastegate
big turbo/high boost = smaller wastegate
small turbo/high boost = smaller wastegate
small turbo/low boost = bigger wastegate "
One of the more popular misconceptions about wastegate sizing is; the more powerful the engine, the bigger the wastegate is needed.
This guide indicates the right size of wastegate:
big turbo/low boost = bigger wastegate
big turbo/high boost = smaller wastegate
small turbo/high boost = smaller wastegate
small turbo/low boost = bigger wastegate "
More info from Turbosmart here: Technical Articles | Wastegate Myths | Turbosmart USA
Why don't you just route your wastegate dump tubes back into your exhaust? Am I the only one running stacked ceramic mufflers around here?!? Noise should be EASILY solvable on a rotary...thicker wall piping helps with resonance too.
Last edited by RGHTBrainDesign; 05-03-16 at 06:37 PM.
#3
First problem I see is the fact that you're going to a larger single wastegate, which actually handles power less effectively.
This is a quote from D-Series (Honda) forum:
Larger wastegates are less prone to boost creep.
More info from Turbosmart here: Technical Articles | Wastegate Myths | Turbosmart USA
Why don't you just route your wastegate dump tubes back into your exhaust? Am I the only one running stacked ceramic mufflers around here?!? Noise should be EASILY solvable on a rotary...thicker wall piping helps with resonance too.
This is a quote from D-Series (Honda) forum:
Larger wastegates are less prone to boost creep.
More info from Turbosmart here: Technical Articles | Wastegate Myths | Turbosmart USA
Why don't you just route your wastegate dump tubes back into your exhaust? Am I the only one running stacked ceramic mufflers around here?!? Noise should be EASILY solvable on a rotary...thicker wall piping helps with resonance too.
#4
Banned. I got OWNED!!!
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#8
Banned. I got OWNED!!!
This is where V-Band Clamps shine. Yea RHD is a LOT harder. They already twisted the entire drivetrain to fit your steering clearances! Anyone else notice how the motor/trans aren't inline with the body?
#9
Full Member
When making a manifold from scratch it's not all that hard actually, my fd is RHD and if you're keeping in mind that you have 2 gates and have to plumb both back in you can design it with that in mind. With my manifold i placed my turbo a bit more to the front at a slight angle so my gates and pipes would fit
#10
Instrument Of G0D.
iTrader: (1)
Yep, driveline is about 20mm off center from memory. It could go over more. Sometimes i think v-band are worse. Especially the turbosmart ones where they give you flange nuts for a clamp that was designed to capture a normal hex nut so you cant even get a spanner on it properly, plus the fact that the two wastegates are essentially spring loaded so you have to line up four v-bands, two of them needing an amount of force, in an area where your hands dont fit.
#11
Instrument Of G0D.
iTrader: (1)
When making a manifold from scratch it's not all that hard actually, my fd is RHD and if you're keeping in mind that you have 2 gates and have to plumb both back in you can design it with that in mind. With my manifold i placed my turbo a bit more to the front at a slight angle so my gates and pipes would fit
#12
Looks like we have to remove the turbo more towards the front and we will use a single 60mm wastegate (piping from each manifold runner to keep the dual WG effect). This has two reasons; 1- Better clearance and/so room for WRC style heatshields 2- Space for a bigger turbo in case I decide to upgrade in the future. I am worried about losing turbo response but my mechanic told me these changes won't have a noticeable negative effect on spool and response and boost control should be ok too.
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