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new cam

Posted: 3/16/07 9:04amMessage 1 of 7

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gs77vet

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Joined: 3/19/2005

Posts: 385

I'm having a new 268 High Energy Cam, High Energy lifters and valve spings, a new timing chain, gaskets and Chrome valve covers installed in next few weeks baring my wife changing her mind. Any comments???????????good or bad on these parts. Gene

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new cam

Posted: 3/16/07 7:06pmMessage 2 of 7

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Dejablu

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Wichita, KS - USA

Joined: 11/10/2003

Posts: 6870

Vette(s): 2005 Daytona Sunset Orange Metallic Coupe --------------------- Sold 1974 T-top, 4 spd to BillKS

Gene, I have the 268 High Energy cam and kit in my baby and I really like it. It's a good street cam and has a somewhat choppy idle. Sounds good and runs good too. Good choice.

Larry

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new cam

Posted: 3/16/07 7:10pmMessage 3 of 7

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Adams' Apple

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Duncanville, TX - USA

Joined: 11/8/2003

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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Save yourself some money...instead of replacing the valve spings, go for some new valve springs...

(sorry...I had to do it!

)

Sounds like a good set-up, but what are you expecting to gain? The 268 cam is one of the best street cams around, and has been for years. But...unless you have an L82(9.0:1 compression ratio), you might be disappointed in the power gains. The L48 is an 8.5:1 comp. ratio. Bigger cams don't always make more power, or torque. The engine needs to have some mechanical compression to make good use of the cam profiles, and it's ability to fill/evacuate the cylinders. Just my opinion...just wanted to see if you were expecting a HUGE change in the engine characteristics with this swap.

Joel Adams
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new cam

Posted: 3/17/07 10:33amMessage 4 of 7

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lukesvette

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HOWELL, NJ - USA

Joined: 5/18/2004

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Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.

I'd speak to the folks on their tech line. They may make a more advised recommendation, based on your compression. They measure a number of factors aside from lift, overlap and duration....

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new cam

Posted: 3/18/07 1:41pmMessage 5 of 7

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aceinthehole

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Manteca, CA - USA

Joined: 11/20/2005

Posts: 3623

Vette(s): 1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed

GUYS ! Very impressive. That fact is very often overlooked. Like they said, compression makes all the difference, and it's not easy to come by.

Jimmy B.
Just can't wait to get on the road again.

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new cam

Posted: 3/18/07 2:22pmMessage 6 of 7

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Sarge81

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WEST SENECA, NY - USA

Joined: 12/3/2001

Posts: 2381

Vette(s): 1981 Blue Ice Met. w/pearl ghost flames TKO500 5speed. LS1 Swap 3.45 Dana 44.

Just a little advice for when you get ready to "break the cam in."

Use plenty of cam lube (of course), drain old oil out and fill 'er back up with Chevron Delo 400 or Shell Rotella T motor oil that the truckers use in their rigs.

Why? That oil has a higher zinc content which regular motor oil, Havoline, Valvoline, Q.S. don't have. This will help in preventing cam failure during the 30 minute break in procedure. And maybe run this oil at the next oil change to ensure the cam and lifters "wear in" together. Some of the local engine builders around here are doing this, due to the high failure rates of new cam and lifter sets they were having.

my .02 cents

GEN III 5.7L "LS6" Engine swap
TKO500 5 spd.

3.54 Dana 44

'69 "N11" Sidepipes
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Born 8/1981
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