350 Rocket Power Issue

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Old Apr 21, 2018 | 05:25 PM
  #1  
travisbeamon's Avatar
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350 Rocket Power Issue

Okay for starters here's the build of my 350 Rocket:
Edlebrock Performer RPM Intake 7111
Lunati Voodoo Hydraulic Flat Tappet Cam 262/268
Holley Avenger 770 Carb
Hooker Full Length Headers
3.42 Posi 10 Bolt Rear end
9:5:1 Compression

Today we finally finished installing the rear end and new brakes and I was to drive the car around for a bit. To be honest it's not performing the way I felt it would. I feel like I'm getting the power I was expecting.

Any suggestions? My father thinks the timing is way off and could be the issue??
Old Apr 21, 2018 | 06:30 PM
  #2  
olds 307 and 403's Avatar
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What converter are you running? If it is stock, that is your problem.
Old Apr 21, 2018 | 06:47 PM
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It's not stock. It's an aftermarket 2400...
Old Apr 21, 2018 | 06:54 PM
  #4  
olds 307 and 403's Avatar
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What is it flashing at? Stock heads? What valve springs?
Old Apr 21, 2018 | 07:03 PM
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What distributor are you using and whats the timing set to?
Old Apr 22, 2018 | 05:23 AM
  #6  
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What exactly were you expecting?
Old Apr 22, 2018 | 08:26 AM
  #7  
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Yes stock heads. I couldn't locate my timing light so we didn't have a chance to check his suspicions of the timing. I'll be checking the timing next weekend when I'm free. It's been a while since the motor was actually rebuilt and I honestly can't remember what springs I used unfortunately.

I was expecting to at least be able to smoke the tires some as the cam selected was for low end torque plus the positive traction with the 3.42 gears...
Old Apr 22, 2018 | 08:35 AM
  #8  
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How do you expect anyone to guess whats wrong when you didn't go through all the steps to set your engine up? There is a really good chance your dad is right.
Old Apr 22, 2018 | 08:48 AM
  #9  
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He may be right and I'm definitely going to check the timing. I was just trying to gather other opinions so that when I get back to the car I'd know some other things to troubleshoot in case that was not the problem. Thanks.

Last edited by travisbeamon; Apr 22, 2018 at 08:53 AM.
Old Apr 22, 2018 | 09:36 AM
  #10  
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OK, so here's my opinion: The ignition timing is way off.
Been there, done that in my younger days before I had money to buy the right tools (such as a timing light) and set the timing by ear - incorrectly almost every time.
Old Apr 22, 2018 | 12:53 PM
  #11  
olds 307 and 403's Avatar
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As said, check the timing. Does it actually have 9.5 to 1 measured compression, a 219/227 cam is on the big side for 350 ci, it will need that 9.5 to 1. You want your total timing in by 3000 RPM at the latest and you want 36 to 38 total. I found 36 fastest at the track, 38 to 40 felt better on the street. Hopefully your converter is flashing at that 2400 RPM. I went from 1/4 block burnouts hitting the gas to only spinning with gravel on the pavement. The stock 1400 stall TH350C converter sucks big time compared to the 2300 flash stall and 2004R I had in my 70S.
Old Apr 22, 2018 | 09:37 PM
  #12  
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Do you have big rims on the back ?? Not 22" eh?
Old Apr 23, 2018 | 03:50 PM
  #13  
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Will be checking the timing on Saturday.

@ 76olds funny. No I have 15x7 SSIIs.
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