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| 390 boooog fixed https://www.slantsix.org/forum/viewtopic.php?t=3867 |
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| Author: | elam [ Sat Jul 06, 2002 4:48 pm ] |
| Post subject: | 390 boooog fixed |
A week or so ago someone posted about a bog on a 390 Holley. I was having the same problem and said when I fixed it I would post the results. I have a mild cam, .100 off the head, ported, offy intake, MP headers, 3.50 gears, and auto trans. I tried every thing I knew to do to the carb, nothing worked. The cam (a 252 comp cams cam) shouldn’t need a stall converter but it did. I could feel it up on the converter and bogging off the line. Well it did need a converter, I went to Midwest on Dennis's recommendation and they built me a converter to my engine specks. I was running 17.46 with out the converter, Don’t know yet what it will do with it but it is flying now as compared to before. I predict 16.50 to 16.80. After I got the verter in then I could tune the 390, nothing worked before. Hope this helps someone. It would just barely spin the tires before, now roast them through first. melam@nxs.net |
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| Author: | Trysix [ Sat Jul 06, 2002 8:14 pm ] |
| Post subject: | Re: 390 boooog fixed |
Quote:
:Glad to hear the car is running so good. I've been slacking a lot lately...been too hot.
Trysix Soupitup@msn.com |
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| Author: | dschumers [ Sat Jul 06, 2002 8:58 pm ] |
| Post subject: | Re: 390 boooog fixed |
HeeHeeHee!!!!!! slantzilla@excite.com |
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| Author: | Dave Clement [ Mon Jul 08, 2002 1:35 pm ] |
| Post subject: | Re: 390 boooog fixed |
Quote:
: A week or so ago someone posted about a bog on : a 390 Holley. I was having the same problem : and said when I fixed it I would post the : results. I have a mild cam, .100 off the : head, ported, offy intake, MP headers, 3.50 : gears, and auto trans. I tried every thing I : knew to do to the carb, nothing worked. The : cam (a 252 comp cams cam) shouldn’t need a : stall converter but it did. I could feel it : up on the converter and bogging off the : line. Well it did need a converter, I went : to Midwest on Dennis's recommendation and : they built me a converter to my engine : specks. I was running 17.46 with out the : converter, Don’t know yet what it will do : with it but it is flying now as compared to : before. I predict 16.50 to 16.80. After I : got the verter in then I could tune the 390, : nothing worked before. Hope this helps : someone. It would just barely spin the tires : before, now roast them through first. I am suprised that you need the high stall convertor with that cam. My Barracuda has about the same setup ( except 4spd OD, 3.23 gears) with the 252S cam and I can pull away from a stop at 900rpm without giving the car any gas on level ground. It will lug down to 1000 rpm in 3rd (1:1) and pull away cleanly. I went up a couple of jet sizes from stock on the 390, moved the accelerator pump cam to the more agressive position and use a yellow secondary spring. Hot-Rod 6 dave.clement@motorola.com |
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| Author: | elam [ Mon Jul 08, 2002 1:48 pm ] |
| Post subject: | Re: 390 boooog fixed |
Quote:
: I am suprised that you need the high stall : convertor with that cam. My Barracuda has : about the same setup ( except 4spd OD, 3.23 : gears) with the 252S cam and I can pull away : from a stop at 900rpm without giving the car : any gas on level ground. It will lug down to : 1000 rpm in 3rd (1:1) and pull away cleanly. : I went up a couple of jet sizes from stock : on the 390, moved the accelerator pump cam : to the more agressive position and use a : yellow secondary spring. I know I didnt think it would need a higher than stock stall but it did i've had V8's with this problem, up aginst the converter, and it felt the same. You know at a stop it was trying to pull through the brakes. I think I need some more carb work now but its 100 percent better. Plenty good enough to drive but I want more. melam@nxs.net |
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| Author: | bud L. [ Mon Jul 08, 2002 4:47 pm ] |
| Post subject: | Re: 390 boooog fixed |
Quote:
: I know I didnt think it would need a higher : than stock stall but it did i've had V8's : with this problem, up aginst the converter, : and it felt the same. You know at a stop it : was trying to pull through the brakes. I : think I need some more carb work now but its : 100 percent better. Plenty good enough to : drive but I want more. What is your idle rpm in gear? fglmopar@aol.com |
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| Author: | elam [ Mon Jul 08, 2002 7:24 pm ] |
| Post subject: | Re: 390 boooog fixed |
Quote:
: What is your idle rpm in gear?
I idle it at about 800 rpm. melam@nxs.net |
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