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

Engine Specific Info and Questions => IDI Engine => Topic started by: burn_your_money on July 03, 2007, 08:03:30 pm

Title: Has anyone measured cam lift and duration?
Post by: burn_your_money on July 03, 2007, 08:03:30 pm: I'm planning on measuring all the different cams that were available for VW diesels but before I waste a bunch of my time if anyone has already done this and can let me know the info that'd be appreciated.

I have the following cams:
1.5 NA solid
1.6 TD solid
1.6 NA solid
1.6 NA hydro
1.6 TD hydro
1.9 TD hydro

I was going to set up a spare head and measure the valve height every 10 degrees or so for each cam and then post the numbers (and hopefully someone with EXCEL can graph it all)

I plan on flipping the head and taking the measurements the same way that you measure piston protrusion, unless there is an easier way?
Title: Has anyone measured cam lift and duration?
Post by: rabbid79 on July 03, 2007, 11:31:21 pm: I'm pretty sure someone on the Vortex has already done this. I've seen some sort of chart which had dozens of factory cam profiles on it. I don't know if it specifically had diesels or not, but it's probably worth looking for.
Title: Has anyone measured cam lift and duration?
Post by: zukgod1 on July 04, 2007, 12:11:06 am: I saw it also.

I remember thinking an NA cam would give a slight EGT reduction in a Turbo application. Been a while though and my memory could be off.

dan
Title: Has anyone measured cam lift and duration?
Post by: burn_your_money on July 04, 2007, 07:51:20 am: Before or after the site change over?

Any idea what section it was in?
Title: Has anyone measured cam lift and duration?
Post by: Black Smokin' Diesel on July 04, 2007, 05:49:55 pm: Hydro 1.6NA, 1.6TD and 1.9TD are the same.
Title: Has anyone measured cam lift and duration?
Post by: burn_your_money on July 04, 2007, 08:24:55 pm: Nice, that means only 3 I have to measure if I can't find that post
Title: Has anyone measured cam lift and duration?
Post by: hillfolk'r on July 04, 2007, 08:30:53 pm: i measured some years+years ago
one was from a solid 1.6na,,and i think lift was around .312(if i remember correctly)
and i thought a 1.6na hydro was like .335 or so
duration ,,,im not sure
you are on yer own there
Title: Has anyone measured cam lift and duration?
Post by: burn_your_money on July 04, 2007, 08:36:29 pm: Does every 10 degrees sound like a good measuring distance (36 times per cycle, ~18 times per lobe) or is that not enough or excessive?
Title: Has anyone measured cam lift and duration?
Post by: foxracer1 on July 05, 2007, 02:21:24 pm: Sounds good to me if i had what it took i would like to do it cause everyone says something different. We need some good concrete numbers.