CaveVan Forum

VW T4 "Eurovans" => Diesel Swap Tech and FAQ => Topic started by: sardolik on March 29, 2016, 02:21:59 pm

Title: AFN vs. AHU
Post by: sardolik on March 29, 2016, 02:21:59 pm

Hi, everyone.

I got a question for experts. I've noticed that in most cases AHU engines are being used for conversion. What about AFN engines? Why don't people use those?

Any pros and cons ?

Thank you!

Title: Re: AFN vs. AHU
Post by: andrew on March 29, 2016, 03:01:07 pm

Probably just because they're harder to get in the United States. I'm not aware of any marked differences between the two internally. Same block casting, same 68-pin ECU, etc. For what it's worth mine is a 1Z running an AFN ECU and VNT turbo with .205 nozzles.

In my estimation the only thing to be concerned about is regarding the lack of bronze bushing for the piston pins in 1Z motors (use ALH/AGR or AHU pistons) and the smooth-body 1Z 10mm injection pump (use AHU, ALH or 11mm ALH). I'm not sure I'd have been as happy with this swap and the taller EWB transmission if I was running stock power levels, so these are relevant concerns.