Runnin' a goofy 'ol 232 AMC straight six in the Flyer. Got a low mileage (33,000) free donor with trans. Got a cam for it. Comp Cam .462/.485 lift. 250/258 duration. 111* lobe seperation. Gonna run a Clifford single plane 4bbl intake on a milled (.060) head with adjustable rockers and a split header. What carb would work well with this combo? Spacer? Dare I say nitrous? The manifold has nitrous bosses that just gotta be drilled and tapped. Anyways....any advice would be appreciated.
A Holley 390 cfm is the standard choice for this set up and should work very well. Some guys run a 500 cfm but it's gonna need tweaking to get right. Be aware of the limits of these engines, rev limit specifically. The 258s top out at 5200 RPM, the 232s a little higher. Make sure your harmonic balancer is in good shape. At higher RPMs the vibrational frequencies of the crank are funky so a good balancer is important. I don't know about a spacer for the carb, mock one up and try it. The AMC 6s are good torque producers so I think you'll be happy with the performance but a little more is always nice. As for nitrous, just use your head and you'll be fine.
Did you know the '63 up AMC six has an Indy racing past?? An outsider carb choice for small primaries with unlimited secondary flow: The Q jet. Though the basic casting has a 700+ CFM capacity, GM used it on 230 CI sixes. Primaries are fine, secondaries if air flap is properly adjusted set themselves to needed flow. A recentish small engine version can be found on on or two years of 262 type V6 trucks--there's just a year or two somewhere around 85 that had the Qjet and no computer control on carb. Early Q jets from 230's are vanishingly scarce. I've got some of this mocked up on a Chevy six, mounted sideways...
So, what you're saying is this will rev 3x faster than my flatty? Sweet!! I think I'll pop for a new 390 Holley unless one of the old dudes here in the dealership might have a Q-jet I can have! Thanks, guys.
Oh, you're used to a flatty? Well, the 232 will feel like a ****el then. Just don't get too buzz-happy. Those cranks come apart in a hurry if spun too fast. The 390 Holley will do you right. If you get ambitious, a 4.0 head from the newer Jeep stuff is a much better head and a bolt on except for converting the fuel injection to carb. They flow well and give a good HP gain.
weren't mike and I just discussing this on another thread? http://www.wps.com/AMC/Navarro-turbo-motor/index.html
This is a good suggestion! This is from Clifford themselves: I thought they offered a three webber side draft combo as well, but I could not find it.
[FONT=Arial, Helvetica][SIZE=-1]47-3024 Triple Weber Side Draught Intake Manifold w/ 199/232/258 cid. Code: 47-3024 Price: $329.00 Quan***y in Basket: none [/SIZE][/FONT] Ah yeah here it is. TRhat would look pretty bad ***, maybe a little bit difficult to set up but worth it in the end I suppose.
That's cool. I think a 4 bbl set up will work better, mechanically and finanacially. My original plans were to make my own 5 deuce intkae using Holley 94's. $$$$ talks. Also, I want to drive this thing more than my bucket. Reliability is a factor here, too.
Ya gotta be careful w/ later 4.0 head swaps...Some flow less!!!! Can't remember Which yrs. But On my p.c. @ home I have about every tech article ever written for the 232/258. Happen to be what I'm running....Sounds like your of to a good start...These engines respond real well to mild performance upgrades, and w/ a standard trans can be quite peppy! As stated, very torquie...I have another in a 63' scout that is running 35's and it'll bark'm going into second. Have fun.....Thay last for ever! Only real draw back to these engines is poor valvetrain oiling...W/ is one of there RPM limiting factors....
Good to know, I wasn't aware that some were not as good as others. Being a cheap, er I mean frugal, fellow I was just gonna port match my head, give it a good valve job and call it done. I have very little $$ in my 258 but then again I haven't started the rebuild yet.
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