Vortec Head Valve Guide Cutting

Vortec Head Valve Guide Cutting. This quick tech video from comp cams® demonstrates how easy it is to use valve spring seat cutters and valve guide cutters to quickly and easily machine near. Took some time to get them all cut down but better than taking the heads to a machine shop.

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We used up about 10 heads, numerous valves, and about $50,000 worth of labor. Vortec heads have a taller guide boss to give additional support to the valve stem, which means they only handle about.420” of lift. Anybody have any information on where i can find the tool that cuts the valve guide boss down on the vortec heads?

Cutting valve guides YouTubeSource: www.youtube.com

Used these to cut down valve guides on vortec heads to get more valve seal clearance for larger cam. Valve guide cutters available to cut guide to.425 •.446 •.494 •.500 •.530 •.625 requires the use of an arbor/pilot, which are available for 5/16, 11/32 3/8 valve stem sizes valve guide cutter (cuts to.530 dia)

Chevrolet 5.7L 350 Vortec Cylinder Head 19962002Source: www.westcoastoffshore.ca

Used these to cut down valve guides on vortec heads to get more valve seal clearance for larger cam. Now vortec heads are capable of.5 and with a little better springs much more.

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Comp cams valve guide cutting tools are designed to cut a larger diameter for your aftermarket valve guide. Im putting an engine together for a friend and the cam lift is.510, and the vortecs will only go to.460 in stock form.

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Even when you buy guide plates they are different. Comp cams valve guide cutting tools are designed to cut a larger diameter for your aftermarket valve guide.

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Comp cams valve guide cutting tools. They are stock race valves if you want to look at it that away.

COMP Cams® Quick Tech Valve Spring Seat Valve GuideSource: www.youtube.com

Now vortec heads are capable of.5 and with a little better springs much more. Anything over.480 the valve retainer will hit the valve seal on the valve guide.

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Just cut the seats enough to widen them out but dont go past the current seat depth and cut the guide bosses to a height of.25 or 1/4. Last edited by alexwelsh on wed aug 13, 2008 8:09 pm, edited 2 times in total.

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Comp cams valve guide cutting tools are designed to cut a larger diameter for your aftermarket valve guide. Both heads make the same power in stock form.

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This gave me a total guide height of.621 and that gave me a retainer to seal clearance of.640. Stock gm valve from the 60s 70s or early 80s.

Best Aftermarket Vortec Heads Free Trial ReviewSource: freetrialreviews.net

Anything over.480 the valve retainer will hit the valve seal on the valve guide. Comp cams valve guide cutting tools are designed to cut a larger diameter for your aftermarket valve guide.

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Thanks to all for the help! This guide boss is also very tall.

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Undercut valves create unwanted turbulence and a decrease in intake charge velocity (they add volume (slowing the gases) to the overall port volume just behind the valve where max velocity is required.) generally speaking, vortecs stall at between.500” and.550” valve lift. Took some time to get them all cut down but better than taking the heads to a machine shop.

Corvette c6 Vortec SuperCharger, Valve covers moreSource: www.shoppok.com

Just cut the seats enough to widen them out but dont go past the current seat depth and cut the guide bosses to a height of.25 or 1/4. Thanks to all for the help!

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Which includes cam, lifters, springs, retainers and locks. When you take that and the larger springs into consideration things get tight fast.

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These cutting tools require the use of an arbor or pilot that is sold separately. Anybody have any information on where i can find the tool that cuts the valve guide boss down on the vortec heads?

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We used up about 10 heads, numerous valves, and about $50,000 worth of labor. Usd 98.99 2 97.95 98.99.

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The study generated 100+ pages of flow and swirl data,which i have at my desk. When you take that and the larger springs into consideration things get tight fast.

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On a vortec head, the limiting factor is valve guide boss height, so one solution is to use offset locks as mentioned in the posts above. Usd 98.99 2 97.95 98.99.

Best Aftermarket Vortec Heads Free Trial ReviewSource: freetrialreviews.net

Up next, you need to decide if you want to use the original valves or make some upgrades. When you take that and the larger springs into consideration things get tight fast.

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Valve spring seat cutter 0.560 in od guide 1.580 in od valve seat steel/carbide universal pit stop usa offers comp cams 0.560 od guide valve spring seat cutter 1.580 od valve seat steel. The 062 does flow slightly better on the exhaust side at low lifts but the advantage over a 906 is very slight.

Seals Mounted Directly On The Top Of The Guide.

For those of you not aware, when installing an aftermarket cam, if the new cam has more that.480 lift at the valve, the guides on the head must be cut down for additional clearance. Check them out next to a reg. Hardened spring seat on gm vortec head 1.350” spring seat cutter, 4721 to install single springs on.775” gm vortec head, w/o hardened spring seat valve guide cutters 4727.446” valve guide cutter.446” 4725.494” valve guide cutter.494” 4715.500” valve guide cutter.500” 4726.530” valve guide cutter.530”

I Found A Cylinder Head Guy That Milled The Heads And Cut Down The Guides, Installed New Seals And Did A Back Cut On The Valves And Reassembled Everthing, All For $168.

Anything over.480 the valve retainer will hit the valve seal on the valve guide. Took some time to get them all cut down but better than taking the heads to a machine shop. These cutting tools require the use of an arbor or pilot that is sold separately.

Com4735 Comp Cams Valve Seat And Guide Cutters.

Up next, you need to decide if you want to use the original valves or make some upgrades. Vortec heads (and most others) like straight stemmed valves. Valve guide cutters available to cut guide to.425 •.446 •.494 •.500 •.530 •.625 requires the use of an arbor/pilot, which are available for 5/16, 11/32 3/8 valve stem sizes valve guide cutter (cuts to.530 dia)

Stock Gm Valve From The 60S 70S Or Early 80S.

The study generated 100+ pages of flow and swirl data,which i have at my desk. Just cut the seats enough to widen them out but dont go past the current seat depth and cut the guide bosses to a height of.25 or 1/4. Now vortec heads are capable of.5 and with a little better springs much more.

Then Look At A Manley Race Valve.

When you take that and the larger springs into consideration things get tight fast. Comp cams valve guide cutting tools are designed to cut a larger diameter for your aftermarket valve guide. This guide boss is also very tall.