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383 Walk Around

 
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Thu Aug 07, 2014 7:15 pm    Post subject: 383 Walk Around Reply with quote

Going to swap engines this weekend and ran it one final time on our break in stand after I changed oil and put the inner springs in. Clay

[IMG]http://i20.photobucket.com/albums/b231/nuity5/Mobile%20Uploads/th_trimD1005C5B-8FC8-4326-B747-A7C62E720193_zps0b4e7b98.mp4[/IMG]

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Joined: 30 May 2002
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1979 Chevrolet Camaro

PostPosted: Fri Aug 08, 2014 9:53 am    Post subject: Reply with quote

Refresh my memory. Why are you pulling the turbo motor?
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Big Dave
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Joined: 04 Dec 2005
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Location: Tampa Florida
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PostPosted: Fri Aug 08, 2014 12:51 pm    Post subject: Reply with quote

And inquiring minds want to know why you built a motor test stand on top of and incorporating of an engine crane? That nice big fan belongs in front of the radiator not sitting off at a forty-five degree angle. Very nice motor test stand otherwise.

Big Dave
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clay
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Joined: 24 Nov 2002
Posts: 3209
Location: South Carolina
318129.23 points


1972 Chevrolet Nova

PostPosted: Fri Aug 08, 2014 8:34 pm    Post subject: Reply with quote

I'm pulling the turbo setup out for two reasons. First it appears to have a bearing starting to go on a lifter. Heard a noise that was coming from under the valve cover and upon more investigation one valve had gained 0.010" clearance. Hopefully I caught it early and it didn't hurt the cam. Second reason is we are going to start with it in our Camaro project so it was coming out eventually anyway.
On the engine stand - I built it probably around 10 years ago and wanted something pretty substantial. I had to use the cherry picker to pick it up anyway so why not use that as a base. It makes setting one up to run incredibly easy and it's one less thing to have to put somewhere.
On the fans - There are fans everywhere on it. We have a fan directly on the radiator that is decent. If we're doing a cam break in we do put another one in front of the radiator also. We also learned to put the fans on the sides if we were doing a cam break in as there is so much heat given off of the headers and will absolutely kill a set of plug wires. We keep all sorts of oddball wires off anything we do a tuneup on to be used as throwaways. I had already made up the final MSD wires and didn't want to take a chance of burning one. In the car you have a lot of airflow from the fan and usually don't have it sitting still at 2000 for 20 min. Clay

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Big Dave
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PostPosted: Sat Aug 09, 2014 12:07 pm    Post subject: Reply with quote

Good Point on the cooling the headers. I used to use cast iron manifolds on my engine stand. I made the mistake of using four corner motor mounts (such as on a 55-57 Chevy) which I discovered was a mistake the first time I tried it with a small block. The front holes and spacing were different.

So after that the small blocks had to be broken in, in the car or on a Dyno, as I didn't build enough small blocks to justify building a second motor stand (or modifying the front mounts to accept a 1961-'62 Corvette SBC front motor mount which I did debate using).

Overheating was a problem as my motor stand didn't have a radiator shroud and the radiator was a two core out of a 1961 pick-up truck that I had lying around. I just about could break in the cam before the temps got out of control with me spraying water on the stock radiator with the fan throwing a mist over the engine in the process.

I am going to guess your bad lifter was a CompCam roller. I say this as I have had two different sets of hydraulics rollers go bad from Comp loosing the spring keeper allowing the lifters to fall apart once and the roller bearings falling apart in a second motor. I would be disappointed to learn that you have Isky or Crower or Lunati (Morrel) lifters.

Big Dave
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10sec.et
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Joined: 29 Mar 2006
Posts: 3472
Location: Houston,Texas
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1969 Oldsmobile Cutlass

PostPosted: Sun Aug 10, 2014 3:14 pm    Post subject: Reply with quote

i just had to do cam break-in on a ford comet. i had to give it a stupid amount of timing to keep the headers from glowing red and burning the paint off the inner fenders. we couldnt talk him into a roller cam Confused
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