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awptickes · 06-24-2008, 07:39 AM

Ok, so I understand how they both work. They both work differently, so this raises the question, which one is more effective on a low-boost application?

I'll be using a FMIC'd T25 in my EJ9 civic. (link in signature)

I'm planning on a recirculating BOV, to let the turbo free-spin instead of surge. If I do this, I need a wastegate, right?

If I use an atomsphere-vented BOV, then can I get away without using a WG?

t3t4delsol · 06-24-2008, 07:59 AM

more the likely the t25 will have a internal wastegate installed, wastegates release exhaust pressure. the wastegate is required

I dont know what manifold your using but most will have a external flange for the wastegate, if your planning on using the internal wastegate your going to need to use a block off plate on the flange. If you want to bypass the internal wastegate and use a external you will need to take off the exhaust side of the turbo and weld the wastegate plate open

the bov is also required, because it will release the pressure in the charge pipes when you close the throttle plate.

also I would vent to the atmoshpere

awptickes · 06-24-2008, 08:12 AM

Ok, cool. Thanks.

LudeBoy · 06-26-2008, 03:57 PM

Quote:

Originally Posted by t3t4delsol

the bov is also required, because it will release the pressure in the charge pipes when you close the throttle plate.

Not required... But I would use one if you want your turbo to last.

06-24-2008, 07:39 AM	#1
awptickes Von Europa Join Date: Aug 2007 Location: Bel Air, MD Age: 20 Posts: 2,004 iTrader: 5 / 100% Ride: 1999 Civic EJ9, 2003 Civic EX Coupé Rep Power: 55	Wastegate or BOV, or both? Ok, so I understand how they both work. They both work differently, so this raises the question, which one is more effective on a low-boost application? I'll be using a FMIC'd T25 in my EJ9 civic. (link in signature) I'm planning on a recirculating BOV, to let the turbo free-spin instead of surge. If I do this, I need a wastegate, right? If I use an atomsphere-vented BOV, then can I get away without using a WG? __________________ DIY/Howto HID Projector retrofit

06-24-2008, 08:12 AM	#3
awptickes Von Europa Join Date: Aug 2007 Location: Bel Air, MD Age: 20 Posts: 2,004 iTrader: 5 / 100% Ride: 1999 Civic EJ9, 2003 Civic EX Coupé Rep Power: 55	Ok, cool. Thanks. __________________ DIY/Howto HID Projector retrofit

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06-24-2008, 07:59 AM	#2
t3t4delsol Senior Member Join Date: Mar 2008 Location: York, Pa Age: 25 Posts: 579 iTrader: 0 / 0% Ride: 97 del sol si turbo / dd is a 95 eclipse gsx Rep Power: 10	more the likely the t25 will have a internal wastegate installed, wastegates release exhaust pressure. the wastegate is required I dont know what manifold your using but most will have a external flange for the wastegate, if your planning on using the internal wastegate your going to need to use a block off plate on the flange. If you want to bypass the internal wastegate and use a external you will need to take off the exhaust side of the turbo and weld the wastegate plate open the bov is also required, because it will release the pressure in the charge pipes when you close the throttle plate. also I would vent to the atmoshpere

Hondaswap.com | Honda Technical & JDM styling Forums

Wastegate or BOV, or both?