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03-16-2008, 07:51 AM
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#1 |
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Registered User
Join Date: Nov 2006
Location: Spavinaw, OK/Scott AFB, IL
Posts: 14
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Engine Bogging
Hey all need a little help.
I got a 72 C10 with a built 383 Stroker (supposed to be around 425hp), I currently have a 600 holley on it due to gas prices and timing is set at 25 degrees ptdc. The problem is if I try to give it too much gas too fast it bogs and stutters, but if I ease into it it runs just fine. And like all of us hotrodders I want to be able to hammer it down off the line. Not sure if it's not getting enough gas with the smaller carb. I have a 750 dual feed I can put on but if there is anything that I can do with the 600 to have better throttle response I would prefer to keep it on. Any suggestions would be greatly appreciated. Thanks |
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03-16-2008, 08:48 AM
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#2 |
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Registered User
Join Date: May 2005
Location: PA
Posts: 2,696
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Re: Engine Bogging
25 deg btdc ... is that at 3K rpm?
Last edited by Jim_PA; 03-16-2008 at 08:48 AM. |
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03-16-2008, 04:26 PM
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#3 | |
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laying low
 
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,453
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Re: Engine Bogging
Quote:
__________________
Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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03-16-2008, 05:22 PM
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#4 |
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Registered User
Join Date: Nov 2006
Location: Spavinaw, OK/Scott AFB, IL
Posts: 14
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Re: Engine Bogging
Ok clarification, the 25 degrees is at idle speed and on my gun it has the degrees on the end of it and is adjustable. So when I have it set at 25 on my gun the line on the balancer is lined up with the 0 on the marker.
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03-16-2008, 06:07 PM
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#5 |
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Registered User
Join Date: Mar 2003
Location: Perrysville Indiana
Posts: 258
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Re: Engine Bogging
That is alot of timing at idle. I usually have 8 to 10 at idle with total timing about 36 at 3000 3500. Are you checking it with vacuum advance blocked off?
__________________
69 Chevelle SS 375/396 TKO 600 71 Suburban 3/4 4x4 402 5-speed (project) 68 chevy C10 shortbed 327 5-speed (project) 72 Blazer 4x4 400 4-speed (wifes project) Numerous 67-72 parts trucks |
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03-16-2008, 06:13 PM
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#6 |
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Registered User
Join Date: Nov 2006
Location: Spavinaw, OK/Scott AFB, IL
Posts: 14
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Re: Engine Bogging
Yes the vacuum is blocked off, I have it at 25 because it idled pretty good at that, if I go below 15 it tries to die on me and the idle is set at 900 rpm right now.
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03-16-2008, 06:35 PM
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#7 |
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Registered User
Join Date: Mar 2003
Location: Perrysville Indiana
Posts: 258
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Re: Engine Bogging
Have you had the distributor cap off lately? Kinda sounds like an advance spring might be broken. Is it hard to start when the motor is warm
__________________
69 Chevelle SS 375/396 TKO 600 71 Suburban 3/4 4x4 402 5-speed (project) 68 chevy C10 shortbed 327 5-speed (project) 72 Blazer 4x4 400 4-speed (wifes project) Numerous 67-72 parts trucks Last edited by Troy-Built; 03-16-2008 at 06:36 PM. |
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03-16-2008, 09:39 PM
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#8 |
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Registered User
Join Date: Nov 2006
Location: Spavinaw, OK/Scott AFB, IL
Posts: 14
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Re: Engine Bogging
Ok the distributor is pretty much junk, pulled it out and gear is not in the greatest shape and the springs are very loose. Ordered a new dist so hopefully that will help.
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