So I installed a LT-1 Cam (Speed-Pro CS1145R) in my 1962 corvette a while back. About a month ago I finally got to the point to where I could start the car. I did not go well. The car was very hard to start and it just popped and cough and spit gas everywhere. I could only get it to run at rpms around 2k. I pulled the carb thinking it was the issue. The intake plenum was all wet and some puddles of gas. I went thru the whole carb to make sure all was setup correctly. I did find the float drop was off a bit so I fixed it.
Put carb back on and same thing.. car was very hard the get started and just cough's and chokes. Will only run at hi rpms once is gets started. Then I decided to check my distributor to make sure it was in correct. It is. When #1 cyl is at TDC on the compression stroke the dist. rotor is pointing at number one cyl. Then I retraced all wired to make sure the were correct and all was good.

Yesterday I actually thought that maybe I installed the cam incorrectly. So I pulled the oil pan and timing chain cover to check. I originally installed the LT-1 cam dot to dot. So when I pulled the timing cover to check I found nothing wrong. (also when I pulled the spark plugs so that I could manual turn the motor a bit easer, they were all wet with fuel and fuel actually dripped from some of the spark plug holes. )
When I manually crank the motor to get #1 on TDC on the compression stroke, the crank dot is at 12 and the cam dot is at 12 o'clock.

Now I'm at a loss. I don't know where to go from here. I'm actually thinking of putting the cam in that I took out back in. The cam I took out is a crower is a 264-sf pro street, part number 00320.
As for the motor. It was rebuild several years ago, (not by me). I drove it for a bit over 4000 miles before I started the frame off restoration on my 62. The block is from 1965 and it was bored .030 during the rebuild. The heads and deck were machined all new TRW 2165 flat top pistons were installed. Also is has Comp Cams 1412 magnum roller rocker arms, (1.52). Other than the block being from 1965, the motor is a 327 340hp. All correct heads, intake and AFB carb.
Could it be possible that the LT-1 cam is just not good for the motor.
I'm just so tired of tearing this motor down and I just don't know what to do next.

Any ideas would be greatly appreciated,

PS. I set the lash for Int. @24 and the Exh @28

Thanks,
Mark

 

I wonder if the distributor is off by a tooth? Or wires off and not firing on the correct order????

 

Do you have a timing light and a dwell meter? There is more involved with setting a distributor than just checking the see the rotor bug is pointing at #1 at TDC.

 

Something is out of whack with timing/ignition. The cam is no issue at all in that motor.

JIM

 

May want to check oil to make sure it didnt get diluted with fuel.

 

I may be wrong about this, but shouldn't the cam dot be at 6 o'clock and the
crank dot be at 12 o'clock???

 

Both dots need to be at 12 oclock, if cam at 6 and crank at 12 it is then its 180 degrees out.

 

That pretty much it.

6 cam and 12 crank makes it easy to get them aligned, as it is real obvious if you are off a tooth

THEN you need to rotate the motor crankshaft one full revolution to get to #1 TDC firing position. Both dots will now be at 12 o'clock

Forgetting part two of the procedure has fouled up more than one person.

If your crank is at 6 and cam at 12 and the dizzy is at #1, i have no idea what you get. It probably isn't that hard to figure out, but it isn't my motor.

Doug

 

yes...they need to be aligned together vertically with the cam dot directly over the crank dot.

 

I would try to fire it retarded some!

 

You rotate both cam and crank with the chain installed. Remember there are two revolutions of the crank for every single revolution of the cam.

Every other revolution the marks are at 6 and 12 o'clock.

 

You mention setting the lash, are you certain you are running solid lifters as opposed to hydraulics?

 

Do a compression test , you may have a valve tight .

 

He says the crank dot is at 6 and the cam dot is at 12....sounds like the problem to me. Don't waste time yanking carburetors, checking valves, etc. Verify that you have the timing gears clocked right first. I'm betting your cam timing is way off.

 

Bingo...

That means when the crank dot is at 12 the cam dot will either be at 3:00 or 9:00. So it's 90 degrees off.

When I put in a camshaft I find TDC using the positive stop method, mark it, then measure the intake lifter rise at X degrees (manufacturer recommendation or my own) at .050 before TDC. Takes the worry out of putting a cam in correctly.


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Hope you don't have a bunch of bent valves if the cam timing is off. Check your pushrods too to see if any are bent.

 

I've already changed the oil three times.. It gets totally diluted with fuel

Thanks,
Mark

 

Thanks, but I cant even get the motor to run and get that done

Mark

 

Sorry, I miss stated you are correct. Actually when I checked it the crank is at 12 and the cam is at 12 when #1 tdc on compression. I miss typed above

Thanks, Mark

 

Sorry my mistake in my frustration I miss stated the actual in my first post. Now I'm even more frustrated because I gave you all the incorrect information. #1 cyl in the compression stroke both dots are at 12...

Sorry,
Mark