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| a few ??? regarding 1bbl>4bbintake and exhaust changes https://slantsix.org/forum/viewtopic.php?t=7492 |
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| Author: | SlantDusterMike [ Mon Nov 10, 2003 9:16 am ] |
| Post subject: | a few ??? regarding 1bbl>4bbintake and exhaust changes |
finally got a lead on a used offy 4bbl setup with a 390 carb, but i have some questions before i pursue it further:: 1) are there any special throttle/kick down linkages needed for the 4bl carb? 2) is there a difference between stock 1bbl and 2bbl exhaust manifolds?? my car is currently a 1bbl, if the 2bbl SS manifold was better flowing then id rather have that. ideally id like to get a set of dutra duals, but thats not in the budget just yet. thanks in advance - mike |
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| Author: | Super6 [ Mon Nov 10, 2003 9:53 am ] |
| Post subject: | Depends.... |
1) Depending on the length of your existing throttle cable, you may be able to use it in the swap, but you will need to fabricate a new hold-down bracket for it. If you have an automatic tranny, you will also need to either fabricate up a kickdown setup, or get a kickdown cable from Lokar or Mancini Racing (Lokar's was cheaper last I saw) DO NOT drive an auto trans w/o a kickdown linkage hooked up--it will burn up the tranny. 2) AFAIK, 1 bbl and 2 bbl exhaust manny's are the same with the exception of the choke pocket. The 2 bbl outlet may be angled slightly differently than the 1 bbl, but does not flow more than a 1 bbl manifold. -S/6 |
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| Author: | Pierre [ Mon Nov 10, 2003 2:59 pm ] |
| Post subject: | |
When I had the clifford 4barrel and 390cfm holley on my car, I used both lokar throttle and kickdown cables with their 4barrel bracket. Worked like a charm and didn't have to fuss with anything. The setup is very versatile, in the future if you ever decide to use a different carb or go efi even all you need is one hole on top of the carb linkage and one below, and your set. |
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| Author: | SlantDusterMike [ Mon Nov 10, 2003 3:36 pm ] |
| Post subject: | |
thanks for the help! it is greatly appreciated!! |
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| Author: | SlantDusterMike [ Mon Nov 10, 2003 3:41 pm ] |
| Post subject: | |
whoops forgot to ask: i see that the new intake kits offer an installation kit for the automatics i'm guess this is linkages or something but cant find any info on it, does anyone know? thanks |
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| Author: | Pierre [ Mon Nov 10, 2003 3:52 pm ] |
| Post subject: | |
I know the dual offy 1 barrel manifold came with throttle linkage to connect the carbs together but I haven't heard anything about linkage with the 4barrel manifold. |
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| Author: | 69cuda69 [ Wed Nov 12, 2003 10:07 pm ] |
| Post subject: | |
I have just converted my slant six from one brl to 4 brl. I used the offy 4 brl. manifold and the holley 390 cfm and it works together perfectly. The throttle linkage if cable will work with home made linkage. any kickdown linkage you may need for a automatic you can find at jc whitney. |
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| Author: | SlantDusterMike [ Thu Nov 13, 2003 6:35 am ] |
| Post subject: | |
69cuda69 how is the driveability with the 4bbl, also did you keep a stock cam? thanks |
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| Author: | 69cuda69 [ Thu Nov 13, 2003 7:31 pm ] |
| Post subject: | |
The drivability is great. when using the kickdown linkage from jc whitney, All I had to do is adjust the kick down accordingly to my driving habbits. Yes I am using the stock cam. I am having problems with the vacume secondaries not wanting to kick in so I'm going to start experamenting with the secondary vacume springs. |
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| Author: | 69cuda69 [ Thu Nov 13, 2003 7:40 pm ] |
| Post subject: | |
I forgot to let you know, I do have dual exhaust on my cuda. I'm sure that helps. Factory exhaust manifold. |
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