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Roehm 
New Member
Joined: 18-October-2005
Location: United States
Status: Offline
Points: 7
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 Topic: 4bbl swap questions
Posted: 24-September-2007 at 8:16AM |
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Alright fellas I am swapping the 351W that is in my car from 2bbl to 4bbl. I know the car originally had a 351w 2bbl. Am I going to need to get a different throttle linkage and kick down for the car. I am sure I will need to but any suggestions where I should get one. BTW the car is a 78' Cougar XR7.
Thanks,
Dan
P.S. I am still working on getting pics yo.
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78' Mercury Cougar XR-7 351W/C6
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PatsPOS
Member
Joined: 06-April-2004
Location: westcentral PA
Status: Offline
Points: 101
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Posted: 24-September-2007 at 4:36PM |
Well, that would depend mostly on the intake you plan on getting. If the carb pad is at stock height, or a little higher, you shouldn't have any problems using your current throttle cable and kickdown. However, if you're planning a hi-rise intake (which you really don't need if you plan on leaving the rest of the engine stock, or close to it), you'll likely need a new throttle cable, and plan on changing your kickdown rod to a cable as well.
I modified a kickdown rod when I put a Weiand Stealth intake on my 460, and while it seems to work well enough, it ain't pretty. Someday I plan on replacing it with a cable. Lokar is the name of choice when it comes to aftermarket cables...first place I would call is Summit Racing, but lots of performance-related places should be able to help.
Pat
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'75 460 Gran Torino Sport (14.04 @ 97 MPH)
'91 Crown Vic (18.09 @ 75 MPH)
'89 300 F-150 (18.37 @ 73 MPH)
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Psquare75
Admin Group
Member of the Stroker Club
Joined: 26-November-2005
Location: United States
Status: Offline
Points: 4589
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Posted: 25-September-2007 at 1:38AM |
If you get a performer intake and edelbrock carb, most likely no, it'll be fine. The kickdown rod is easy enough to modify.
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Paul
77 XR7 460/C6/3.00:1 *SOLD*
78 XR7 523/C6/3.5:1
79 F100 460/TKO500/3.25:1
'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500
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Roehm
New Member
Joined: 18-October-2005
Location: United States
Status: Offline
Points: 7
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Posted: 25-September-2007 at 3:52AM |
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I am going to use a stock cast iron intake manifold so I guess everything should work out ok. However I do plan on going to a weiand stealth a little later down the road. Thanks guys I appreciate the info.
Peace,
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78' Mercury Cougar XR-7 351W/C6
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Psquare75
Admin Group
Member of the Stroker Club
Joined: 26-November-2005
Location: United States
Status: Offline
Points: 4589
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Posted: 25-September-2007 at 5:13AM |
A stealth is a little too high end for a stock 351W, IMO.
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Paul
77 XR7 460/C6/3.00:1 *SOLD*
78 XR7 523/C6/3.5:1
79 F100 460/TKO500/3.25:1
'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500
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Roehm
New Member
Joined: 18-October-2005
Location: United States
Status: Offline
Points: 7
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Posted: 25-September-2007 at 2:29PM |
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There will be other parts added before that...such as cam and headers, maybe some other stuff. Ohh btw I looked at some pics of your cougar a while ago Psquare75 and my cougar looks exactly like yours, interior and all. Your is really quiet nice
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78' Mercury Cougar XR-7 351W/C6
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Psquare75
Admin Group
Member of the Stroker Club
Joined: 26-November-2005
Location: United States
Status: Offline
Points: 4589
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Posted: 26-September-2007 at 1:24AM |
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Ah cool, Thanks. I finally took it out last night a little bit after parking it for 4 months... got rid of detonation I was having etc. I won't say I "fear" the car.. more like "respect" the car. farther I press the gas, the harder the car pulls.. I still haven't REALLY tried a WOT run, nor have I just stuff it from a standstill. I think that will just result in a bunch of tire smoke. LOL
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Paul
77 XR7 460/C6/3.00:1 *SOLD*
78 XR7 523/C6/3.5:1
79 F100 460/TKO500/3.25:1
'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500
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Roehm
New Member
Joined: 18-October-2005
Location: United States
Status: Offline
Points: 7
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Posted: 26-September-2007 at 7:36AM |
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With that drive train I can see what you mean.
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78' Mercury Cougar XR-7 351W/C6
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4bbl swap questions