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

Engine Specific Info and Questions => IDI Engine => Topic started by: zaprzal on July 24, 2008, 02:38:42 pm

Title: gas camshaft?
Post by: zaprzal on July 24, 2008, 02:38:42 pm

does vw 8v gasoline camshaft fit 1.6/1.9 idi?

Title: gas camshaft?
Post by: gigaz2 on July 24, 2008, 02:52:34 pm

not without extensive modifications, that was discussed recently.

the pulleys are completely different and the head needs to be machined so the lobes will clear.

Title: gas camshaft?
Post by: vanagonturbo on July 24, 2008, 07:35:24 pm

I must have missed that discussion. Head needs to be machined? Why?

Another note that might help with using a gasser cam is that you can section the cam pulley like many aftermarket adjustable cams sprockets are made and use the Diesel outside and the gas center hub.

Title: gas camshaft?
Post by: foxracer1 on July 24, 2008, 08:54:43 pm

I too must have missed that. I would be interested if anyone knows the thread. I have done some reasearch in this but haven't gone far enough to make it happen. Much better selection of cams if it did work.

Title: gas camshaft?
Post by: VW_Commuter on July 24, 2008, 09:02:26 pm

Diesel camshafts, if I recall correctly, don't have any overlap between intake and exhaust valves while gasser camshafts do have overlap.

Title: gas camshaft?
Post by: dieselwagen on July 24, 2008, 09:31:53 pm

if this is an old topic, it means someone must have tried it out.
like to hear any actual benefit/disadvantage of gasser cam with respect to everyday driveability, mileage and power loss or gain.?

will a diesel engine respond the same way gasoline engine does with changes in valve timing? closer lobe separation? aggresive ramp profile, etc..

Title: gas camshaft?
Post by: gigaz2 on July 25, 2008, 04:11:23 am

it was on the other side of the forum: http://vwdiesel.net/phpBB/viewtopic.php?t=14417

there are links there for yet more info

Title: gas camshaft?
Post by: TDIMeister on July 25, 2008, 05:58:34 am

I am the author of the original thread linked to on the TDIClub page.  The idea of using a gas cam in a Diesel is not my idea, nor is it particularly new; I just bothered to do some research into it. It's also not only an idea but has been tried for several years.

Shortysclimbin, who is also a member here, posted (http://forums.tdiclub.com/showpost.php?p=2153736&postcount=221) about his experiences installing a 2.0 8V cam into his TDI head.

IMO the narrower width of the gas cam sprocket is not a huge deal because the torques on the valvetrain are not too large; the width is there because of the injection pump.

Title: gas camshaft?
Post by: hatemi on July 25, 2008, 01:58:37 pm

The thing is that atleast with the cam from 1.8gti and 2.0 2e engine there are only 4 points machined to fit the head(bearings...) You can get the one that is left unfinished machined so it will actually fit in a diesel head. The sprocket is the easy part since you can make a adjustable hybrid one from diesel and gasser sprocets.