Low boost on stock y7??

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Old Apr 8, 2021 | 08:30 PM
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Default Low boost on stock y7??

Will an automatic y7 civic support 5psi stock on a t03/t04 turbo kit?
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Old Apr 8, 2021 | 08:50 PM
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Default Re: Low boost on stock y7??

It depends on the turbo... but likely.
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Old Apr 8, 2021 | 09:00 PM
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Default Re: Low boost on stock y7??

I don't know the turbo brand, but its a journal..wet gloating bearing turbo or something like that? Its completely my first time doing this, don't have much money to build the engine right now, but I want to slightly feel and hear a turbo, without killing my only motor..so I wonder if 5psi is overkill considering its automatic and bone stock ya know. Thanks for any and all help
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Old Apr 8, 2021 | 09:16 PM
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Default Re: Low boost on stock y7??

Compressor side..49 &.50/ turbine is a .57trim t03 going directly onto a bone stock d16y7. Is low boost safe with a manual boost controller?
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Old Apr 9, 2021 | 05:24 AM
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Default Re: Low boost on stock y7??

Originally Posted by New2Boost
I don't know the turbo brand, but its a journal..wet gloating bearing turbo or something like that? Its completely my first time doing this, don't have much money to build the engine right now, but I want to slightly feel and hear a turbo, without killing my only motor..so I wonder if 5psi is overkill considering its automatic and bone stock ya know. Thanks for any and all help
Originally Posted by New2Boost
Compressor side..49 &.50/ turbine is a .57trim t03 going directly onto a bone stock d16y7. Is low boost safe with a manual boost controller?
Automatic says you shouldn't boost it at all.
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Old Apr 9, 2021 | 05:28 AM
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Default Re: Low boost on stock y7??

Automatic SOHC, no money for a proper build engine, and you don't know any real details about the turbo. You're also indicating that you haven't even considered tuning it, and are just going to randomly throw on a MBC.

This will not go well if you choose to proceed.
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Old Apr 9, 2021 | 06:13 AM
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Default Re: Low boost on stock y7??

What is your budget? You can use an FMU and a missing link and you'll probably be OK. Or you could buy an AFC. It's old tech, but it will work for your goals. If going this route, I would HIGHLY recommend running a wideband oxygen sensor so you can know when you're beginning to tax your (mostly stock) fuel system and let out before you blow it up. Resist the urge to turn it up without proper tuning.

Either way I think you're going to find that even trying to skimp by, it's going to be more expensive than you thought.
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Old Apr 9, 2021 | 07:01 AM
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Default Re: Low boost on stock y7??

From what I was looking at regarding the turbo and the specs of it, 245hp @10psi and I have 550cc injectors and a walbro 255lph fuel pump ready to install as well. I just would like to cruise around listening to the turbo itself blowoff lol without killing my engine. I'm looking into tuning for it also. Thank you for the help. Its definitely costing me as I go though just trying to get setup for this project
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Old Apr 9, 2021 | 11:32 AM
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Default Re: Low boost on stock y7??

James from Texas Honda Channel ran a similar setup for a while then swapped a manual in.
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Old Apr 9, 2021 | 10:33 PM
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Default Re: Low boost on stock y7??

Originally Posted by DaX
What is your budget? You can use an FMU and a missing link and you'll probably be OK. Or you could buy an AFC. It's old tech, but it will work for your goals. If going this route, I would HIGHLY recommend running a wideband oxygen sensor so you can know when you're beginning to tax your (mostly stock) fuel system and let out before you blow it up. Resist the urge to turn it up without proper tuning.
The FMU would be good for 5psi of boost on an automatic Honda because there is really no tuning involved, it should supply enough fuel by increasing the fuel pressure at a linear rate per psi of boost. I used on for two years on 8 psi on a T3/T04E .63a/r 60 trim on a B18b, So it’s good for low boost, and could work with this set up.
If you have 550cc injectors already, I don’t know what kind of engine management system tuning software to use since it’s an automatic. The Apexi AFC (Hack as it’s called because it tricks the stock computer) can control up to 440cc injectors. MAYBE 550cc if you can put it to -100% for idle or just lower your base static fuel pressure with a fuel pressure regulator...
The tough part about automatic Hondas is that there isn’t much support for tuning them. But, the FMU is what I suggest for 5psi with a T3/TO4E. But don’t really try to go above 8psi of boost with it.
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Old Apr 10, 2021 | 05:10 AM
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Default Re: Low boost on stock y7??

Thank you bro for your advice. I really appreciate it
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Old Apr 10, 2021 | 10:48 AM
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Default Re: Low boost on stock y7??

Originally Posted by New2Boost
Compressor side..49 &.50/ turbine is a .57trim t03 going directly onto a bone stock d16y7. Is low boost safe with a manual boost controller?
You won’t need a manual boost controller, just use the 5psi wastegate spring in the wastegate to control boost. A Tial 38mm is a good wastegate option, and they have a large variety of wastegate springs available. I don’t know if the have one that is exactly 5psi, but they have a spring somewhere around there. So no need for a boost controller. If you go up to 8psi of boost then just change the wastegate spring. It’s real easy to change a wastegate spring with an Allen wrench.
A turbo kit that has quality components and is reasonably priced is this one:
GO-AUTOWORKS Street Turbo Kit Honda Civic Acura Integra Del Sol CRX D16 B16 B18
Try to avoid the eBay brand turbos or the no-name, non reputable turbo chargers because they have lots of problems.
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Old Apr 10, 2021 | 07:17 PM
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Default Re: Low boost on stock y7??

Thanks bro. The turbo I received has no direct name on it to identify it by, and I'm not sure what size wastegate spring is already inside the wastegate. But, the kit included a manual boost controller and a boost gauge. Will that stock y7 handle 8lbs?? On 550cc injectors and the 255lph fuel pump?
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Old Apr 10, 2021 | 08:10 PM
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Default Re: Low boost on stock y7??

Originally Posted by New2Boost
Thanks bro. The turbo I received has no direct name on it to identify it by, and I'm not sure what size wastegate spring is already inside the wastegate. But, the kit included a manual boost controller and a boost gauge. Will that stock y7 handle 8lbs?? On 550cc injectors and the 255lph fuel pump?
I think the engine can handle it. I just don’t know what to tune for the extra fuel with because all the tuning software I know of requires a manual transmission except for the Apexi AFC, which usually handles up to 440cc/minute injectors on a stock computer.
If I were you, and what I did, was use the stock fuel injectors and computer with the Vortec 10:1 rate Fuel Management Unit (FMU), and the Walbro 255 liter per hour fuel pump (the one rated for high pressure is better for this application).
The engine itself should be able to handle the power.

For the wastegate, does it have a name brand in it? If not, it might be a Tial 38mm replica/copy, there are a lot of copies out there. Some work fine actually. If it is a copy, then the Tial wastegate springs might work and might be the same. This goes for Tial wastegates, but yours may be the same if it looks like this externally. And if you get the right spring, then you don’t need the manual boost controller. Manual boost controllers are only for increasing the boost.
[img]blob:https://honda-tech.com/3048cdec-ce16-4830-88b1-cfd8f3a4cd50[/img]

Last edited by highschooler; Apr 10, 2021 at 08:16 PM. Reason: Picture didn’t show up the first time, so I added it.
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Old Apr 10, 2021 | 08:18 PM
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Default Re: Low boost on stock y7??

That wastegate picture is for the MV-R, but you might have the MV-S copy or similar type. Just search the wastegate you have and spring types/colors.
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Old Apr 11, 2021 | 05:25 AM
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Default Re: Low boost on stock y7??

Originally Posted by New2Boost
Thanks bro. The turbo I received has no direct name on it to identify it by, and I'm not sure what size wastegate spring is already inside the wastegate. But, the kit included a manual boost controller and a boost gauge. Will that stock y7 handle 8lbs?? On 550cc injectors and the 255lph fuel pump?
Where did you get the turbo kit? Post a link, if you can. If you got it from Ebay, it is full of Chinese clones. If there is ANY advice you hear, let this be it..
It is not a question of whether or not your stock Y7 can handle 8lbs, it is how you plan on tuning, (first) and whether or not your autotragic transmission is going to grenade on your first WOT pull. The FMU is a viable option but, I'm pretty sure you'll need to use your stock injectors for this. I have no personal experience to ANY plug and play injectors that you can install and they work as designed with no actual engine management setup; Piggy-back unit or chip burn.. Have to be able to monitor your AFR, so you'll need a wideband as well.. I'm normally not the one to discourage but, this has "no" written all over it.
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