TII secondary THB mod (pros and cons).

FRED · 07-08-2011, 09:42 PM

And I might add that the outer set of secondary throttle plates can come in handy especially on a series four non turbo engine converted to turbo. If one uses the stk turbo on that configuration and deletes the twin scroll......the car will bogg down and have less torque than a non turbo engine til you get the rpms up over three grand. But if you run a vacuum line to the double throttle diaphram the outer set will stay closed til you virtually get into boost, thereby increasing the low end torque. Makes the thing driveable in the neighborhood when just going to the store to do shopping i.e. normal drive situations. Thanks to a kiwi named Bumpstart for that idea.

rotorlips · 07-09-2011, 02:54 PM

all welded up . going to put it all back together and see what happens . I was removing the pulsation damper and stock fpr so figure perhaps this may be a great time for the mod. not that I had a problem before but seeing so many the the stock dampers fail I figured why not . the aeromotive fpr will now be the only dedicated regulator for fuel . thankx for all the input .

07-08-2011, 09:42 PM	#1
FRED Rotary Fan in Training Join Date: Mar 2011 Posts: 73 Rep Power: 15	And I might add that the outer set of secondary throttle plates can come in handy especially on a series four non turbo engine converted to turbo. If one uses the stk turbo on that configuration and deletes the twin scroll......the car will bogg down and have less torque than a non turbo engine til you get the rpms up over three grand. But if you run a vacuum line to the double throttle diaphram the outer set will stay closed til you virtually get into boost, thereby increasing the low end torque. Makes the thing driveable in the neighborhood when just going to the store to do shopping i.e. normal drive situations. Thanks to a kiwi named Bumpstart for that idea.

07-09-2011, 02:54 PM	#2
rotorlips The Newbie Join Date: Feb 2011 Posts: 25 Rep Power: 0	all welded up . going to put it all back together and see what happens . I was removing the pulsation damper and stock fpr so figure perhaps this may be a great time for the mod. not that I had a problem before but seeing so many the the stock dampers fail I figured why not . the aeromotive fpr will now be the only dedicated regulator for fuel . thankx for all the input .