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-   -   Tops out at 5200 RPM's (http://www.hotrodders.com/forum/tops-out-5200-rpms-229385.html)

dub 02-09-2013 11:49 PM

Tops out at 5200 RPM's
 
Hey Guys,
Two questions:
I was told that the engine I bought was a 383 stroker engine with a mild cam.
To me, the power isnt there for a stroker motor. Is there anyway to tell without breaking down the entire motor?

Second question:
The max RPM on this current engine is 5200. To me, that seems low, but I could be wrong.

Specs on the motor-
350 block, hei ignition (stock Chevy Dizzy), RPM Airgap intake manifold, long tube headers, holly DP 650, mild cam (seller stated), Turbo 400 tranny, Auburn pozzi rear end, 3.73 gears.
I think thats all the info that may be needed.

Any info/answers are helpful.

Thanks in advance.

Mike

75gmck25 02-10-2013 06:09 AM

Also verify the travel on the accelerator cable. I had trouble with my engine flattening out at about 4K RPM and found that I had not adjusted the accelerator cable when I replaced the carburetor. I was not pulling open the secondaries and that is why power went flat.

Bruce

Plaintoast 02-10-2013 07:40 AM

Quote:

Originally Posted by dub (Post 1644635)
Hey Guys,
Two questions:
I was told that the engine I bought was a 383 stroker engine with a mild cam.
To me, the power isnt there for a stroker motor. Is there anyway to tell without breaking down the entire motor?

Second question:
The max RPM on this current engine is 5200. To me, that seems low, but I could be wrong.

Specs on the motor-
350 block, hei ignition (stock Chevy Dizzy), RPM Airgap intake manifold, long tube headers, holly DP 650, mild cam (seller stated), Turbo 400 tranny, Auburn pozzi rear end, 3.73 gears.
I think thats all the info that may be needed.

Any info/answers are helpful.

Thanks in advance.

Mike

a couple of things,
first, do the balancer and flexplate/flywheel have counterweights? its not an absolute answer on if its really a 383, but if it doesn't, chances are good that it is not. many will not go to the expense of internal balancing on one.
second, what heads are on it? does it appear to have stock heads? maybe the valve springs were not replaced or not up to the task.

vinniekq2 02-10-2013 09:25 AM

all of the above,even if just partial,they may be compounded
add in the small carb,and not knowing deck height and where the piston
is in the bore?
When I bought a car with an unknown engine,I took it out
and blue printed the engine
many small corrections had to be made


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