ZDX Big Bore DBW Throttle Body

R555 · 17th October 2012, 18:41

Anyone tried this TB? Its OEM Honda and also known as the J37 I think.

Inlet ID 78mm
Outlet ID 70mm

stoney · 17th October 2012, 19:05

I was gonna get 1 a while back Dave before Marcins Junk2 came up. OEM reliability etc. Definitely a good TB for big NA/ charged set ups if you can make it suit the charger.

Manifolds will need opened up for sure

bertje · 17th October 2012, 19:26

I received mine this week, they are huge and very nice ,worth the mony
very cheap and oem, what more could you want
i already ajusted the map hole,made threat in the hole so that I can connect.......

R555 · 17th October 2012, 20:05

Quote:

Originally Posted by stoney

I was gonna get 1 a while back Dave before Marcins Junk2 came up. OEM reliability etc. Definitely a good TB for big NA/ charged set ups if you can make it suit the charger.

Manifolds will need opened up for sure

How would you get the pipe from the air box to the TB to fit over it? I presume it would need a custom pipe making?

R555 · 17th October 2012, 20:06

Quote:

Originally Posted by bertje

I received mine this week, they are huge and very nice ,worth the mony
very cheap and oem, what more could you want
i already ajusted the map hole,made threat in the hole so that I can connect.......

What cams are you using? I think I saw on K20 org that one guy lost power with it as it was just too much air for his cams!

bertje · 17th October 2012, 20:20

i am going to use big rotrex

stoney · 17th October 2012, 20:20

Yup Dave, getting something osrted to suit my S2

ghost_bhp · 17th October 2012, 21:26

Quote:

Originally Posted by R555

What cams are you using? I think I saw on K20 org that one guy lost power with it as it was just too much air for his cams!

Just a question, but how could the engine take in too much air? as when the valves open air fills the available space.. you cant over fill a cylinder? or could this be related to too denser air going in?

and that throttle body comes on a few other Acuras with V6's I think, would make a pretty good oem equivalent to the skunk2 one.

MightyMatt · 17th October 2012, 21:29

ive chosen to go with this TB when my build starts, interested in opinions and reviews.

Guys at k20a rate them

mw1978 · 17th October 2012, 21:38

im using ZDX TB as well with bored (70mm) and ported RSP manifold
I meassured today my NA setup before i get rotrex

mods: toda manifold, 3" exhaust, 76mm custom CPL style CAI, ZDX TB, bored and ported RSP, FD2 cams

R555 · 17th October 2012, 21:42

Quote:

Originally Posted by stoney

Yup Dave, getting something osrted to suit my S2

Something like a custom intake pipe?

I guess to get the full benefit of the bigger TB you'd need to bore out the exit from the Tegiwa intake and use a 78mm hose / pipe all the way to the TB?

Quote:

Originally Posted by ghost_bhp

Just a question, but how could the engine take in too much air? as when the valves open air fills the available space.. you cant over fill a cylinder? or could this be related to too denser air going in?

and that throttle body comes on a few other Acuras with V6's I think, would make a pretty good oem equivalent to the skunk2 one.

I'm not sure, that was just what I was reading, the guy lost a few HP and he put it down to the TB being too big?

stoney · 18th October 2012, 07:10

On mild cams the airmass will lose speed at low rpms due to the diameter being large . Things should be different up top

Lunar Tick · 18th October 2012, 09:36

All that really matters is the TB outlet size - not the inlet size. So this is in effect a 70mm TB. I got good gains everywhere when I fitted my S2 72mm TB (although I am using A3 cams).

MW - that's amazing torque for an MA set up!

yarters · 19th October 2012, 10:00

Quote:

Originally Posted by Lunar Tick

MW - that's amazing torque for an MA set up!

Thats what I was thinking! Very impressive!

BRM · 19th October 2012, 16:46

Quote:

Originally Posted by mw1978

im using ZDX TB as well with bored (70mm) and ported RSP manifold
I meassured today my NA setup before i get rotrex

mods: toda manifold, 3" exhaust, 76mm custom CPL style CAI, ZDX TB, bored and ported RSP, FD2 cams

Quote:

Originally Posted by Lunar Tick

MW - that's amazing torque for an MA set up!

Quote:

Originally Posted by yarters

Thats what I was thinking! Very impressive!

MArcin, care to share your setup? Intake and Exhaust?

17th October 2012, 18:41	#1 (permalink)
R555 Supporter Car: 2007 CTR, Milano Red Join Date: 17th November 2009 Location: North Yorks Posts: 5,142 Thanks given: 819 Thanked 403 Times in 376 Posts iTrader: (6)	ZDX Big Bore DBW Throttle Body Anyone tried this TB? Its OEM Honda and also known as the J37 I think. Inlet ID 78mm Outlet ID 70mm

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17th October 2012, 19:05	#2 (permalink)
stoney Supporter Car: 2007 FN2 GT Join Date: 24th March 2010 Location: lisburn Posts: 7,182 Thanks given: 159 Thanked 1,075 Times in 912 Posts iTrader: (9)	I was gonna get 1 a while back Dave before Marcins Junk2 came up. OEM reliability etc. Definitely a good TB for big NA/ charged set ups if you can make it suit the charger. Manifolds will need opened up for sure

17th October 2012, 19:26	#3 (permalink)
bertje Join Date: 7th April 2012 Location: belgium Posts: 88 Thanks given: 0 Thanked 2 Times in 2 Posts iTrader: (0)	I received mine this week, they are huge and very nice ,worth the mony very cheap and oem, what more could you want i already ajusted the map hole,made threat in the hole so that I can connect.......

17th October 2012, 20:20	#6 (permalink)
bertje Join Date: 7th April 2012 Location: belgium Posts: 88 Thanks given: 0 Thanked 2 Times in 2 Posts iTrader: (0)	i am going to use big rotrex

17th October 2012, 20:20	#7 (permalink)
stoney Supporter Car: 2007 FN2 GT Join Date: 24th March 2010 Location: lisburn Posts: 7,182 Thanks given: 159 Thanked 1,075 Times in 912 Posts iTrader: (9)	Yup Dave, getting something osrted to suit my S2

17th October 2012, 21:29	#9 (permalink)
MightyMatt Supporter Car: Mugen 200 Join Date: 3rd August 2011 Location: Belfast Posts: 1,086 Thanks given: 117 Thanked 103 Times in 96 Posts iTrader: (1)	ive chosen to go with this TB when my build starts, interested in opinions and reviews. Guys at k20a rate them

17th October 2012, 21:38	#10 (permalink)
mw1978 Car: 2007 CTR Join Date: 31st January 2007 Location: Poland Posts: 1,172 Thanks given: 36 Thanked 106 Times in 97 Posts iTrader: (2)	im using ZDX TB as well with bored (70mm) and ported RSP manifold I meassured today my NA setup before i get rotrex mods: toda manifold, 3" exhaust, 76mm custom CPL style CAI, ZDX TB, bored and ported RSP, FD2 cams

18th October 2012, 07:10	#12 (permalink)
stoney Supporter Car: 2007 FN2 GT Join Date: 24th March 2010 Location: lisburn Posts: 7,182 Thanks given: 159 Thanked 1,075 Times in 912 Posts iTrader: (9)	On mild cams the airmass will lose speed at low rpms due to the diameter being large . Things should be different up top

18th October 2012, 09:36	#13 (permalink)
Lunar Tick Supporter Car: 2008 FD2, Vivid Blue Join Date: 8th June 2010 Location: Cumbria, UK Posts: 1,539 Thanks given: 218 Thanked 383 Times in 308 Posts iTrader: (1)	All that really matters is the TB outlet size - not the inlet size. So this is in effect a 70mm TB. I got good gains everywhere when I fitted my S2 72mm TB (although I am using A3 cams). MW - that's amazing torque for an MA set up!