Binnendiameters(mm)
d14a4/3/8 - 55
d15b7 - 55
d15z6 - 55
d16a6 - 55
d16y7 - 55
d16y8 - 55
d16z6 - 55
D16a9/ZC - 55
d16a1 - 55
d16a8 - 55
b18c1 - 60
b18c4 - 60
b18c5 - 62
b18a - 58
b18b - 60
b18c6 - 62
b16a SiR - 58
b16a Sir2 - 60
b16a1 - 58
b16a2 - 60
b16a3 - 60
b16b - 60
b20b - 60
b20z - 60
h22a - 60
h23a - 60
F18B (Accord 99'-02') 55 en past op D-series mits kleine aanpassing.
f20c - 62
f20 S2k - 62,5 (en past op B serie spruitstuk)
f22 - 60
f23 - 60
c27a - 68
The plenum volume is critical on N/A engines, and a basic rule of thumb is: The smaller the plenum, the lower the rpm range, and bigger means higher rpm. The throttle body size and flow rate also affect the plenum size: Bigger TB, smaller plenum, small TB, larger plenum.( Larry Widmer , Endyn )
The best way to find out if your TB is too small for your IM plenum is to determine what the intake manifold absolute pressure (MAP) sensor is reading (in the plenum) when you are at full throttle ( or wide open throttle (WOT) ) while the car is accel using a datalogger. The MAP should be equal to, or close to, atmospheric pressure. If it isn't or there is a MAP drop at WOT, then your TB is still too small. ( Dave Thompson , Thompson Engineering)