VWDiesel.net The IDI, TDI, and mTDI source.

Engine Specific Info and Questions => TDI Engine -General Info => Topic started by: lucasone on July 26, 2010, 03:01:35 pm

Title: Camshafts
Post by: lucasone on July 26, 2010, 03:01:35 pm

Does anyone know if the camshaft in a ALH(TDI 1.9) is the same as a AHU(TDI 1.9) cam?

I have a camshaft with a custom grind that works great in an ALH and I would like to put it in my AHU.

Title: Re: Camshafts
Post by: mrchill on July 27, 2010, 12:10:43 am

Typically you can use an ALH cam in an AHU\1Z application....you just cannot go the other way around....

Title: Re: Camshafts
Post by: myke_w on November 08, 2010, 06:25:22 am

mrchill, can you tell us more about the alh cam in the 1z /ahu? what differences are there?

Title: Re: Camshafts
Post by: R.O.R-2.0 on November 08, 2010, 01:09:17 pm

Quote from: myke_w on November 08, 2010, 06:25:22 am

mrchill, can you tell us more about the alh cam in the 1z /ahu? what differences are there?

I bet Dr. Diesel knows everything about the different TDI cams, and has specs for all of them.. just a guess tho..

Title: Re: Camshafts
Post by: dieselherb1 on November 08, 2010, 08:28:23 pm

I'd like to know also Mr. Wizard

Title: Re: Camshafts
Post by: burn_your_money on November 09, 2010, 03:11:53 am

Quote from: mrchill on July 27, 2010, 12:10:43 am

Typically you can use an ALH cam in an AHU\1Z application....you just cannot go the other way around....

You can not use a AHU/1Z cam (or earlier) in a 1.6 because the timing slot on the ALH is used to drive the vacuum pump.

This graph Dr Diesel and I worked on shows the lift and duration of the ALH but nothing on the AHU or 1Z.

http://img.photobucket.com/albums/v603/burnyourmoney/Camshafts2.jpg

Title: Re: Camshafts
Post by: smiffie88 on November 18, 2010, 01:14:19 am

i put aaz cam into an alh head i just made the slot for the vacuum pump bigger

Title: Re: Camshafts
Post by: foxracer1 on November 22, 2010, 08:49:42 am

I put an AAZ cam in my AHU/1Z.

Title: Re: Camshafts
Post by: G60ING on November 27, 2010, 07:50:49 am

the alh can be swapped into the ahu from what I've read. Take a look here and other cam forsale threads on tdiclub and you will see similar info as found in this thread: http://forums.tdiclub.com/showthread.php?t=295122

I've also read on vwdiesel.net's older cam debate thread about how the AZZ cam is an upgrade for the AHU