Lingenfelter cam or other good?

[1fastsilverado]

well im bout to pull the votec350 apart. n i want to kno some good cams to put in it by Lingenfelter. or any otehr cams. im puttin all new valves in my heads, and boiring it .30 and such i think. hopefully i wont have to broe much. but all info appreciated.

[NITROUS]

What year model is the 350?

[NITROUS]

Ok, your sig says it's a 96.

The stock vortec heads are only good for .470" to .475" lift unless you have machine work or after markert / GMPP aluminum heads.
If you try to use more lift than that you will pinch the oil seals and break the stock springs.
I went with a comp cam (I'll get you the numbers when I get out in the garage).
If you add 1.6 roller rockers like I did, the lift will be too much and you'll pinch and break like I did. This is why I'm installing the LS1 LOL!
The vortec motor will idle rough if you go over .214" on the duration so you would have to install a stall converter and some custom programming beyond a Hypertech or compatible programmer. If you look at the combo in my sig, I was putting out somewhere around 340 to 350 HP without the Nitrous.

[1fastsilverado]

whats stock cam lift?

[NITROUS]

This is the factory cam used in all 1996-2000 Chevy L30 & L31 Vortec truck engines.
Intake lift- .414"
Exhaust Lift- .428"
Intake duration @.050"- 191
Exhaust Duration @ .050" - 196
Lobe Centerline- 111


GM (General Motors) part # 10241264

[NITROUS]

I'm pretty sure this is the cam I went with since the box has a stock vortec cam in it now. The lift is to the max and the stock springs won't last. I added 1.6 roller rockers and drilled out the pushrod holes another 1/8" for clearance. This added close to .030" lift more. I made it 70,000 miles before one of the springs broke but seals were leaking before that. This cam sure loved the 150 shot of Nitrous! There is a tool made for machining the stock vortec heads to get more lift and get away from coil bind.

Here's the motor, I'm gonna miss her!!





Part Number 08-500-8
Engine -9999 Chevrolet
305ci-350ci
8cyl.
Grind Number CS XR258HR-12
Description

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Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.48 0.488
Duration At 0.006 Tappet Lift 258 264

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Valve Timing At 0.006
Open Close
Intake 21 57
Exhaust 68 16

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These Specs Are For The Cam Installed At 108 Intake CL
Intake Exhaust
Duration At 0.05 206 212
Lobe Lift 0.32 0.325
Lobe Separation 112

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Recommended Valve Springs 986-16



1fastsilverado, you might want to talk to vortec 350 also, I looked at his sig and his cam is pretty well at max lift also. He might be able to tell you if he had any head work done to compensate.

[1slow01z71]

You wont miss it for long, you fall in love with the LS1 quickly.

[vortec350]

Thats me and my heads did not have any work done to them with this cam!