I have a 1974 chevy c10 with a 350ci engine. I just recently put a 670
street avenger holly carb and holly intake, and i can not get any power
out of it. if anything it seems that it lost power since i removed the
stock carb and intake, also i am not sure what degree to set my timing. if
any one can tell me what in the world to do i would appreciate it because
i am soo digusted with my truck that i could ...... Thanks
First, I'd look for a vacuum leak or something silly like that. Maybe
your vacuum advance is hooked to the wrong place on the carb. You
could start with the standard timing and see how it behaves. Then
advance 2-4 degrees and see if you can tell a difference. Repeat, if
you like the results. Eventually, you'll hear knocking and know
you've gone too far, if the performance hasn't declined before you get
there. Keep a record of where you are and what the results were.
Is the respiration system a reasonable match for this engine? I don't
know how much air/fuel your 350 needs. If you are still using the
stock cam, pistons, heads, etc., you may not be able to increase the
respiration much with good results. Too much air/fuel may make it bog
Good luck and let us know how it comes out.
i took my truck and got someone else to adjust the timing and the carb. it
ran great all day. late this evening i got in it and started to town it
ran okay, but when i left the store the temp hand was still above 100
degrees on the engine and it did not want to start acted like the battery
was dead but its a new battery. i guess the timing is still low but dont
understand it ran great great early today and i could cut it off and it
would crank fine, now i am not sure what the problem is....
the higher intake and open spacer would raise the powerband into the higher
making sluggish acceleration down low. advancing the timing would help the
acceration, but would make it difficult to start if advanced too much and
when it's hot.
in your previous post, you mentioned the adapter to mount the carb. i'd
area too for vacuum leaks because some of the adapters don't completely
mounting areas causing a leak @ times.
this plate adapter may help:
Edelbrock # EDL-2732.
Check the timing, also check that the vacuum lines are properly
routed. Also check for possible obstructions in that little piece of
metal tubing that the factory put on the stock vaccuum line just
before it goes into carb. I had something of the same problem, it
turned out that line was clogged with gunk.
That carb might be too big for your engine. You might want tosimply
rebuild the stock carb. That's what I did when I put a new 350 into
my 77 C-10 which should be about the same as yours.
The vaccum line distribution is critical and is different for
different engine set up that year. You have to check the factory
manual to make sure its right.
On Mon, 05 Apr 2004 23:24:32 -0400, "deerslayer"
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