What happened?

[RednBlack]

Can't find the original thread. What happened to the one that used exhaust cams instead of intakes due to the longer duration? Anything ever come out of that? Just curious.

[SappySE107]

RE: What happened?

I dunno, didn't look but I bet it hasn't been done yet. I dunno how you would time it right.

[RednBlack]

Sounded like a good idea. Timing should be close to stock. All you are dealing with is longer duration, then you can tweak it from there.

[DrRodey]

Heres the original thread

link

[RednBlack]

I see. I guess the idea just died. Maybe something to think about next winter, I have other fish to fry at this time. Thanx Dr. (But just think, if you had 4 exhaust cams, you could retard all of them 13 degrees. )

[SappySE107]

How is timing it easy? The cam flats certainly don't pertain to the cam flat position anymore, which makes timing it a lot more difficult. I would rather not bother for the meager cam difference between the intake and exhaust.

[RednBlack]

Mark your positions before you take off the old cams, (intake) on the cam snout itself and the cam gear. This is done using machinist dyekem and a sharp scribe. Put your own reference marks on the engine and cam gear. Then, by laying the cams, side by side in V-blocks, transfer the marks to the new cam. This can be done using a dial indicator to match the total lift . Then using a height gage with a scribe attached to transfer the marks. Your old exhaust cams are already locked down. Install the new cam and gear. Match the marks you made previously on the cam gear, snout and engine. I can't see being off 1/2 degree either way.

[RednBlack]

I do have to ask another question though. Are the intake and exhaust cam races the same size? The positions of the lobes match, but I can't figure the races being the same. Too easy to mix up cams. Maybe this is why the thread died?

[SappySE107]

Im almost 100% sure you can swap the cams around. Marking the cam gear is worthless because its not keyed. You will have to use a dial indicator to match the lobe position and then mark the cam in reference to the carrier. Even then, you won't have a cam flat to change timing from stock easily without swapping the cams around and making more marks. Im also not sure if they cams will sit properly since there are only 3 positions it likes to sit at. If not, keeping the cam in place while installing the cam gear is going to be very difficult. If you can do it, id love to see how but until then, im sticking with my "not worth the effort" theory.

[Fierobsessed]

I think the biggest question is, Whats the difference between the cams? is it respectable or insignificant? I happen to have 4 96-97 exhaust cams and intake cams laying around (in my garage 2700 miles away)

[Kohburn]

I didn't measure - but atleast on the 95 they look identicle other than the obvious nature of their timing..

and 500$ is not bad for a regrind of 4 cams as long as they can increase lift

has anyone actually done a w41 profile regrind to a 3.4?

[slick94prix]

I didn't measure - but atleast on the 95 they look identicle other than the obvious nature of their timing..

and 500$ is not bad for a regrind of 4 cams as long as they can increase lift

has anyone actually done a w41 profile regrind to a 3.4?

I was getting ready to post the same thing. I'm really looking into getting cams regrind sometime. Anyone have any actual results yet?

[your_I.D.]

donk 316 and I, are moving ahead with the testing of 4 exhaust cams. Does any one knoe IVO, IVC, for the stock intake cams?