vsocks1

Yeah, and it was fine everywhere except 10 degrees ATDC. I guess you should always check closely in the area of about 25 degrees each way around TDC.

vsocks1

Just to update this thread....donor head for flycutting didn't arrive so we are on hold till next weekend!

vsocks1

Donor TFS head arrived from TEA today..





Donor head with Lindy flycutting tool in valve guide

sami85L98

Man thanks for sharing all pics and details about your project. GL and wish u best.

vsocks1

Flycutting in progress....



After cutting 0.080 intake relief - need to sand/cleanup yet!

vettenuts

That's pretty cool, I see the lower half of the QTP split cover

vsocks1

Here is the setup in progress



Drivers side done - still want have to do final sanding later!



Passenger side done too!

I brake for nothing

Very cool. I had no idea you could cut your own valve reliefs . Does this weaken the piston in any way ?

vsocks1

It is not a problem if you don't go too deep. I think the stock pistons are .220 thick in that area. Have been told you can go up to .100 safely. remember you are just cutting a relief in a smaller area of the total. I would be more concerned if you were running boost or something!

Kurtomac

why did it cut so chattery? most ive seen looks like it cuts a smoother relief

Y2Kvert4me

I think it's just the nature of that cutter. The few other flycut jobs I've seen pics of (using the Lindy cutter) looked the same way.


The Isky cutter (what I used on mine) looks radically different.



And leaves a cut that looks like this: (the scratches are just from using sandpaper to remove the sharp edge of the cut)




I wish I could have made it over to Verne's this weekend, to see how differently his Lindy cutter worked compared to mine.

vsocks1

The tool did tend to chatter a bit with my setup...slow turning air ratchet. I think that you have to learn to apply even steady pressure.
With more practice and possibly a higher turning speed it could have possibly been better.

Here is one of the cuts cleaned up a bit.



Once they are cleaned up some I am not sure that it will matter at all - any other opinions?

SteveDoten

Opinions? Yes, I have personally seen the mod'd LS head Tom used, he has real world experience, don't get confused w/ the waxer 20's

Nice thread, nice work people!!!!

Jackal

I have not read through the last 10 or so posts, but I noticed some recomending to use solid lifters to check PTV clearance for a hydrolic setup. This is COMPLETELY wrong. Never use solid lifters to check ptv. There is a certain amount of pre-load stock hydrolic lifters will take, and a solid lifter will not give you an accurate measurement. I am speaking from experience, and almost cost me a motor.

Keep up the good work!!

vettenuts

With check springs and an adjustable pushrod at zero lash, solid lifters can be used. Not sure I understand.

Y2Kvert4me

I'm not quite sure what you mean.

Using a solid lifter will always give you a "worst case scenario" indicated clearance. It rules out any possibility of lifter compression masking what in reality could be valve travel towards the piston (once pumped up with oil pressure).

Example, checking with a solid lifter, you find you have .060" p/v clearance. Do same check with a hyd lifter in the same manner, and then you see .100" clearance. The lesser of the two readings is the one I'd trust and base decisions from, because the difference in readings likely came from lifter compression.

As we were checking it, we were using very light checking valve springs. Less likely to compress the lifter in the course of checking. The one time we did try checking with a normal valvespring, we got much better indicated clearance, because instead of the valve compressing clay, spring was compressing lifter. That's a bogus measurement, and one we did not trust.

Hope that makes sense.