New Rebuilt motor/NO POWER - Chevelle Tech
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post #1 of 100 (permalink) Old Mar 19th, 17, 4:20 PM Thread Starter
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Elliott
 
Join Date: Nov 2012
Location: greenville sc
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New Rebuilt motor/NO POWER

Hey Guys,

I just did my first restoration and first complete motor rebuild on a 1st gen 327 for my 65 chevelle. I built this thing pretty strong (or so I thought), and I'm really confused because it runs like a slug (like slower than my 90 hp jetta)..I have my timing set to about 35 degrees total, and haven't messed much with anything else yet extensively. The car starts well, and idles just fine to my untrained ear. But, under acceleration it feels like it has nothing/no power...

I had a friend do a little work on the car about a month ago. He thought my distributor was locked out, and set my initial timing at 33 degrees. When I put a light on it and noticed this, I reset it to read 14 initial degrees/35 total (assuming 21 degrees in the distributor). Note: there was no change in performance when I adjusted the timing as mentioned above.

No skipping, no backfiring, shifts just fine, and nothing else obvious that I've noticed to date that could be the culprit.

The specs on the motor are as follows:
1st gen 327 w/ garage ported 461 heads
2.02 valves
small journal crank
comp cam 282s/12-223-4 camshaft
dome top pistons
holley 650 DP
full length headers
1.6 roller rockers
mallory 85551 dist with 21 deg of mech advance installed (which is how it came in the box)
edlebrock perfromer rpm air gap manifold
high volume oil pump
fuel pump that flows 110 gph @8 psi
4.10 rear end gear with positive traction
2700 rpm stall convertor
th400 w/ a shift kit
Probably close to 12:1 compression (note:I have only run 100 octane in the car to date.

Does anyone have any ideas? Like I said, this is my first motor rebuild and I really don't know where to go from here. Thanks guys!
If you need more info just let me know!
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post #2 of 100 (permalink) Old Mar 19th, 17, 4:37 PM
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Eugene
 
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Re: New Rebuilt motor/NO POWER

The cam would not be my first choice but it should work okay. Did you degree the cam or just install as is? When you say garage porting was it done by someone that hasn't done a lot of porting? The reason I ask is I have seen engines produce less horse power after a home porting job. You may pick up a bit with some carb work and getting the distributor set up properly.
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post #3 of 100 (permalink) Old Mar 19th, 17, 5:13 PM
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Re: New Rebuilt motor/NO POWER

I had a cam a few teeth off once(lined up the keyway instead of the mark) ran terrible. Found the issue and it ran like a scalded dog.
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post #4 of 100 (permalink) Old Mar 19th, 17, 5:22 PM
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John
 
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Re: New Rebuilt motor/NO POWER

Heads are what I am thinking is the issue how much experiance in this garage port job.

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post #5 of 100 (permalink) Old Mar 19th, 17, 6:20 PM Thread Starter
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Elliott
 
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Re: New Rebuilt motor/NO POWER

Thanks for the responses guys. I'll respond in order:

Bonkerman, I installed the cam straight up/dot to dot. I did not degree it. I did the port job myself and went really slow, but it was under the supervision of my machine shop. I took the heads to the shop to have them check as I progressed. They said it looked great, so I dunno about that. I totally see what you're saying though. I'm not sure what else to try with the distributor. Any ideas?

Alwhite00, I lined it up dot to dot. Is that what you mean you went back and did?

Strictly attitude, I sure hope its not that..I didn't do much at all to them, just smoothed out the transitions. I left the intakes a little more rough and the exhaust smooth. I did all the work under supervision in my garage. I can't imagine the little bit I did is causing all this, but I could be wrong and thats why I'm here.
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post #6 of 100 (permalink) Old Mar 19th, 17, 6:22 PM Thread Starter
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Elliott
 
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Re: New Rebuilt motor/NO POWER

One thing I noticed today when I took the car down the street. The ignition box seems to be making a noise almost like a motor running when the car is under acceleration.

Any ideas on that?
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post #7 of 100 (permalink) Old Mar 19th, 17, 6:26 PM
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Re: New Rebuilt motor/NO POWER

Is your timing mark correct? Have you physically verified it shows TDC on #1 when the piston is TDC on #1?

Steve R
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post #8 of 100 (permalink) Old Mar 19th, 17, 6:35 PM Thread Starter
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Elliott
 
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Re: New Rebuilt motor/NO POWER

Steve,
I can't say I'm 100% on that, but I think I did it right based on what I've learned. I'm using a zero'ed marker I installed on my timing cover, and used one of these slip on damper covers with timing marks. There was only one way it could go on.

Here's what I did:

I turned my dial on my light to 13-14 degrees advance, and my zero's on the damper and timing cover marker lined up. I checked this at idle.

Then, I revved the motor until the timing stopped advancing, and the advance on my light read right between 34-35 degrees of advance with the zeros lined up. I figure this makes sense seeing as it was specified that my distributor had 21 degree advance bushings installed from the factory.

I hope that makes sense..tell me if it doesn't and I'll try to clarify. It's been a long time since I've set timing. Thanks
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post #9 of 100 (permalink) Old Mar 19th, 17, 6:38 PM Thread Starter
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Elliott
 
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Re: New Rebuilt motor/NO POWER

Steve, I forgot to say..Yes, I physically observed this when the heads where off the car. I think I did it right. I turned the motor until the #1 piston was at TDC, which is where the marks lined up at zero on the damper and my timing cover pointer
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post #10 of 100 (permalink) Old Mar 19th, 17, 6:56 PM
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Gary
 
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Re: New Rebuilt motor/NO POWER

check the cranking compression and report back
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post #11 of 100 (permalink) Old Mar 19th, 17, 7:01 PM Thread Starter
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Elliott
 
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Re: New Rebuilt motor/NO POWER

Ok, I'm not sure how to check cranking pressure but I can find out. Thank u
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post #12 of 100 (permalink) Old Mar 19th, 17, 7:05 PM
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George
 
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Re: New Rebuilt motor/NO POWER

every now and then folks forget to check for full throttle.
With engine off, have your assistant depress the gas pedal. You observe if the throttle opens fully.
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post #13 of 100 (permalink) Old Mar 19th, 17, 7:20 PM
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Re: New Rebuilt motor/NO POWER

Quote:
Originally Posted by kettbo View Post
every now and then folks forget to check for full throttle.
With engine off, have your assistant depress the gas pedal. You observe if the throttle opens fully.
x2
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post #14 of 100 (permalink) Old Mar 19th, 17, 7:23 PM
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Re: New Rebuilt motor/NO POWER

look directly down into the carb with a good light whjile you do this. Many guys have been tripped up by this.
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post #15 of 100 (permalink) Old Mar 19th, 17, 8:16 PM Thread Starter
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Elliott
 
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Re: New Rebuilt motor/NO POWER

Kettbo,

Lol, my dad and I literally were just mentioning we should do that. Good call!
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