VALVE LASH ADJUSTMENT WITH SOID LIFTERS

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corvettecherry
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Tell us about your Corvette: 1976 stingray L-82
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VALVE LASH ADJUSTMENT WITH SOID LIFTERS

Post by corvettecherry »

ADJUSTING SOLID VALVES WITH A REED Mechanical Flat Tappet Series Cam

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HELLO, i"M ABOUT TO SWIM INTO UNCHARTED WATERS FOR ME. ADJUSTING VALVE LASH WITH SOLID LIFTERS.

i KNOW THE SPECS ON THE CAM AND KNOW MY INTAKE AND EXHAUST GAPS, BUT HAVE NEVER ADJUSTED SOLIDS BEFORE. I WAS INFORMED THAT THE PROCEDURE WAS TRICKY. ALSO NEVER ADJUSTED WITH ROLLER ROCKERS.

I HAVE A 76 STINGRAY L-82,350, WITH VORTEC HEADS AND ROLLER ROCKERS. A REED MECHANICAL FLAT TAPPET CAM (SPECS BELOW)

ANY AND ALL INFO WOULD BE GREATLY APPRECIATED, SO ANY SPECIAOL TOOLS,TRICKS, AND AS USUAL EXCELLANT FORMUN ADVICE WOULD REALLY HELP.

THANK YOU CORVETTE CHERRY
(Grind
T 270 UL
Master #
SA-183

Advertised Duration Duration @ .050" Duration @ .100" Duration @ .200" Duration @ .300" Lobe Lift


270 238 204 144 63 .324"


Intake C/L 98 100 102 104 106 108 110 112 114
Tappet Height At TDC

.112" .106" .099" .093" .086" .080" .074" .068" .063"


Valve Lift with Respective Rocker Ratio 1.5:1 1.55:1 1.6:1 1.65:1 1.7:1 1.73:1 1.75:1 1.76:1 1.8:1
.486" .502" .518" .535" .551" .561" .567" .570" .583"
Valve Lash with Respective Rocker Ratio add .002" on exhaust .018" .019" .019" .020" .020" .021" .021" .021" .022"

IM A TOTAL NOVICE AT THIS BUT I DO HAVE MECHANICAL ABILTIES AND OPEN FOR ALL SUGGESTIONS THANK YOU

:lurk:
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MaineVette
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Re: VALVE LASH ADJUSTMENT WITH SOID LIFTERS

Post by MaineVette »

Can't say I've ever adjusted a solid-lifter roller cam. Only hydraulic-lifter roller cams. That said, maybe this video from comp cams will help:

http://www.youtube.com/watch?v=3gMYWLMAzao

I find they have a lot of technical info and how-to info on their site. Might be worth checking out. Here's one article that may help: http://www.cpgnation.com/forum/comp-cam ... -2076.html
Someday I'll finally be able to drive my Vette, but for now I'll just admire all the pieces... :willy:

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nomadhermet
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Re: VALVE LASH ADJUSTMENT WITH SOID LIFTERS

Post by nomadhermet »

Cherry; The cam is a single profile both int and exh share the same profile. 270 duration makes a great street cam with enough vacumm to operate the vacumm systems on a corvette. The engine idle will be what is called lopey and engine idle speed will have to be increased with this duration. The trans 76 corvette i'm thinking auto, converter stall speed will effect idle speed.
The valve lift with stock 1.5 ratio lifters is 486, If you use a higher lift ratio rocker i would cheak piston to valve clearance. The hot lash is .18 int/.20 exh this is with iron heads if your vortex are alum then lash is increased .
Adjust your valves cold [measure twice cut once] take your time, i always start over and cheak them a second time on solids. Then adjust them with engine running,i have a valve cover cut in half long ways that i bolt on to help hold oil from exhaust pipes, if you have good oil pressure you will make a mess anyway,but i once owned a corvair.

The cam should work great for you with readjustment at approx 8000to10000 miles.
The only problem is the cam grinder[reed] is closed and warrenty is ?
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vito
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Re: VALVE LASH ADJUSTMENT WITH SOID LIFTERS

Post by vito »

Grad your feeler gages and oil stops for the rocker arms. I use to do mine with the engine running. Plenty of rags :ack: but it is not that hard. Start with the manufactures recommendation write it down and make note of the performance. You can make the gap more and then less to check the performance. Make sure you write it down. Then mark where you like it best. Also do not add adhesive on the valve covers/heads until the last adjustment :D

I always liked the sound of the mechanical cam.

Cheers

vito
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rbryce1
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Re: VALVE LASH ADJUSTMENT WITH SOID LIFTERS

Post by rbryce1 »

When I adjusted the valves on my 1970 350/370 hp LT1 engine (in my '68 Corvette), I had metal clips that clipped onto the top of the rocker arms to deflect the oil as it came out of the pushrod hole. It really did a fantastic job of deflecting the oil down onto the rocker arm instead of onto the garage wall.
firstgenaddict
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Re: VALVE LASH ADJUSTMENT WITH SOID LIFTERS

Post by firstgenaddict »

The easiest and cleanest method for adjusting solids is cold and off- rotate to TDC and adjust 2 indicated valves rotate 90 degrees adjust the 2 valves indicated and so on and so forth.
Look up the valve setting instructions from DUKE WILLIAMS and JOHNZ
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