what would i need to do to swap a d16a6 motor into a 91' stock crx hf???????????? please help i tryed to search for HF info couldn't find any.

 

That should be an easy swap. Both are MPFI, so you have absolutely no wiring to do. Assuming both you have a manual transmission, mounts are the same, shift linkage is the same, everything is the same. Every (sp)accesorie (alternator, a/c, etc) should be identical. If you are keeping the tranny from ur hf, the starter is the same. Litterally you should take out the HF motor, drop the Si motor in. Put everything back on the Si motor as you took it off the HF motor. I am pretty sure of this, someone verify.

 

i read some where that the HF hubs are smaller and that i would have to use SI hubs? true?

 

no, you can use your stock axles and stock tranny if you want. So use your stock axles with your d series tranny and your set.( i used si tranny on hf crx)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX_Control &raquo;</TD></TR><TR><TD CLASS="quote">no, you can use your stock axles and stock tranny if you want. So use your stock axles with your d series tranny and your set.( i used si tranny on hf crx)</TD></TR></TABLE>

Yea, Honda has convenient axles, one axle can fit a lot of applications.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mach69 &raquo;</TD></TR><TR><TD CLASS="quote">That should be an easy swap. Both are MPFI, so you have absolutely no wiring to do. Assuming both you have a manual transmission, mounts are the same, shift linkage is the same, everything is the same. Every (sp)accesorie (alternator, a/c, etc) should be identical. If you are keeping the tranny from ur hf, the starter is the same. Litterally you should take out the HF motor, drop the Si motor in. Put everything back on the Si motor as you took it off the HF motor. I am pretty sure of this, someone verify.</TD></TR></TABLE>
you will need to use the HF engine harness on the Si engine - harnesses are not interchangeable - the Si engine harness will plug into the HF chassis harness, but it won't work as all of the wires in the connectors are in different locations and some are even in different connectors - you will have one connector left over, which went to the HF EGR valve - A6 doesn't have EGR - if your Si engine is 89-91, it will have a Fast Idle Control Valve on the back of the intake manifold on the driver's side - the HF harness does not have a connector for FICV - just plug the vacuum connections on the FICV and leave it not connected - it will run fine without it - FICV only works to increase idle slightly when ambient air temp is below -10C (14F) - wasn't even on 88 Si - the HF has more vacuum lines which run to the black box on the passenger's side - they are for the EGR system - make sure you get vacuum lines from the throttle body to the correct sensors (MAP and purge solenoid) in the black box