lushdrunk

Ive got a few questions about installing a cam in my 1994.

1: Is it wise to install a performance cam in a high mileage motor? (123,000 miles)

2: Is it possible to install a new cam in a 94 without pulling the engine if you remove the radiator support?

3: When installing a new cam with the engine installed do you replace the bearings? I'm guessing you would, But how could you do it with the engine still in the car?

4: With a higher ratio roller rocker (1.6) is it wise to install a performance cam in an other Wise stock motor?

5: If questions 1,2 are answered "yes" What cam is most recommended for a exhaust only LT1 ? (long tubes, no cats performance mufflers)

Thanks

STL94LT1

1. I see alot of guys on the Camaro forums installing camshafts in high mileage cars, it would make me a little nervous.
2. Yes you can install a camshaft in your 94 with the engine in car, I've done it 3 times in mine.
3. You can't replace the cam bearings with the engine intact.
4. Most use 1.6 roller rockers with cam upgrades.
5. Cam recomendations depend on your goals. But, a pretty good overall performer is the Comp Cams 503.

rickneworleansla

1. I installed my cam last year with over 100k miles. It now has about 125k. I think freshening up the top end and front of the motor helped it run much better.

2. I installed the cam in my 95 with the motor in the car. I had to remove the radiator, shroud, and move the condensor out of the way.

3. I did not change the bearrings.

4. I installed 1.6rr with the cam install.

5. I went with a custom cam.

lushdrunk

Thanks for the advice. I'm going to need to do some thinking about this one. I'm not sure I like the idea of installing a new cam with old barrings. Can a cam spin a barring like the crank can?

JrRifleCoach

ANS

1. I did and after 6K miles plus its running just fine. Actually much better!

2. Pulled the radiator and moved the A/C condensor out of the way.

3. No.

4. I did and didn't have to modify the stock valve covers.

5. Sorry mines an L98.

Used the Comp Cams XE-262 with their lifter/chain/spring and 1.6 roller tip rockers.
The sound is "Corvette correct". The power is VERY MUCH improved over stock.

rickneworleansla

Maybe this will help to see whats involved...

http://forums.corvetteforum.com/c4-t...lp-needed.html

JAKE

Any bearing can spin under the right (wrong) conditions, usually related to oil. Cam bearings are usually the last to be effected; rods then mains usually fail first.

I don't know of anyway to change cam bearings with the engine in the car; clearance issues abound.

If you use care in removal and installation of the cams and if your existing cam bearings weren't causing a problem, you can continued to use them with confidence. It's what I did last year when doing a cam swap on my son's 96 LT1; 115k miles.

Over the years I've only changed cam bearings when doing a complete rebuild which included all the bells and whistles.

Hope this helps.

Jake

0Paul Ruggeri

With that kind of milage I would replace the valve springs with the new cam.

JrRifleCoach

For the cost of springs, why bother asking?

(beyond 80K and ten years)

Or what ever the cam warranty requires.