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#55350 - 09/13/04 02:05 AM ? about stock IM
CivicVTi Offline
Sr Member


Registered: 12/02/99
Posts: 1176
Loc: Athens , Greece
What is the diameter of the stock IM opening (b16a)? I found a good deal on an ITR TB (which is 62mm I think) and I wonder if I have to port the IM opening (which should be at least 60mm, like the stock TB I believe).
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Honda Civic VTi '95 EG6 hatch (stock B16A2) B18C6 specR swap (Euro)

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#55351 - 09/13/04 07:06 AM Re: ? about stock IM
kysi Offline
Jr Member


Registered: 12/20/02
Posts: 494
Loc: kentucky
Honda/Acura Throttle Body Inside Diameters (in mm)

b18c1 60
b18c spec R 62
b18a 58
b18b 60
b16a SiR 58
b16a Sir2 / b16a2 60
b16a3 58
b20b/z 60
f20c 62
d15b7 56
d16a6 55
d16y7 56
d16y8 56
d16z6 56
ZC 55
d16a1 55
d16a8 55
h22a / h23a 60
f22 / f23 60

Hope that helps.

Larry


Edited by kysi (09/13/04 07:40 AM)
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#55352 - 09/13/04 11:42 AM Re: ? about stock IM
CivicVTi Offline
Sr Member


Registered: 12/02/99
Posts: 1176
Loc: Athens , Greece
Thank you very much for the reply. What about intake manifold diameters. I suppose they are not exactly the same with the TB used. I would like to know the b16a2 and b18c5 (R) IM diameter (I think skunk2 opening is 65mm).
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Honda Civic VTi '95 EG6 hatch (stock B16A2) B18C6 specR swap (Euro)

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#55353 - 09/13/04 12:46 PM Re: ? about stock IM
kysi Offline
Jr Member


Registered: 12/20/02
Posts: 494
Loc: kentucky
This is what I came up with from some stats I had stored. Engine specifications between B16A and B16B. (ITR intake manifold is same as CTR)


Engine Type B16A------ B16B 98 Spec.R
Maximum Output 170ps/7800rpm-------185ps/8200rpm
Maximum Torque 16.0kg-m/7300rpm----------16.3kg-m/7500rpm
Bore x Stroke 81.0x77.4mm -------<- same
Displacement 1595cc--------- <- same
Compression 10.4 ---------------- 10.8
Maximum RPM 8000rpm------- 8400rpm
Valve Timing
at 1mm lift IN Open/Close BTDC15/ABDC45-------- BTDC18/ABDC45
EX Open/Close BBDC40/ATDC7 -------- BBDC45/ATDC10
Valve Lift IN 10.7mm, EX 9.4mm IN 11.5mm, EX 10.5mm
Inlet Valve Diamter 33mm x 2mm <- same
Spark Plug Type Heat Rate #6 Heat Rate------- #7 platinum
Throttle Bore Diameter 60mm ----------<- same
Intake Manifold Single pipe sideflow----------- <- same
Air Intake Diameter 65mm -------<- same
Exhaust Manifold 4-to-2 -------<- same
Exhaust Pipe Diameter 48.6-50.8mm 57.2mm
Silencer Flow Capacity 98liter/sec 115liter/sec
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