Re: [Amc-list] Days of Whine & Roses

[Wrambler242@xxxxxxxxxxx]

On that last note, there's a side of me who really wishes I'd have dropped a 4.0L head and efi on the original 232 in my car just to see what it ran like.
  On another note related, over on the strokers group and at Jeepstrokers.com We have been disscussing the need to taper the bore at the intake side of head. Seems that installing the 4.0L head on the 4.2L and smaller engines leaves a BIG ledge there. A simple taper grind from the top ring area to the head gasket may be sjut the ticket to clean the potential restriction and or hot spot off. Much the same as putting big valves on the small V-8's.
  Unfortuneatly all of us have either finished their engines or not even started yet, so we have little real world experience with this idea.
   John, NOSIGMA, was the first one I am aware of to examine this and point it out, so I want to give credit where credit is due.
    Also some interesting flow charts up on Jeepstrokers.com  for those into the intelectule stuf...

For me, If I was stil running the 232. I'd get the 91-98 head, 2000 up intake, 91-95 efi, Oh, and 91-98 exhaust will clear a drivers side starter if you adapt a Ford case to it with the front cable tang or custom rotate the housing. I did go that far with a mockup before I pulled it and installed the 4.0L. I'd also taper the top of the intake side of the cylinders too.

--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5
2004 Grand Cherokee Laredo, 4.7L, Quadratrc II
" Chronic Pain Hurts"

 -------------- Original message ----------------------
From: Tom Jennings <tomj@xxxxxxx>
> Wrambler242@xxxxxxxxxxx wrote:
> > With the six the gains have been due to intake design. then the final deed 
> that got ht ejob close to being done was efi as injecting at the head solved 
> most of the lngth issues with the six. Chrysler went even farther by deisgning 
> the 2000 up equal length intake.
> 
> yeah, that is the worst thing about the iron intake, 1 and 6 run lean, 
> 3, 4 rich. It's quite noticable when finely tuned.
> 
> The only other thing that changed much was combustion chamber shape, but 
> not all THAT much. And camming is hardly changed in all those years. I 
> don't know about amc six cams past the carb days though.
> 
> Lots of other incremental changes, oiling, cooling, etc but intake was 
> the biggest, and lucky for us, you can bolt the new stuff onto the old 
> motors.
> 
> Being lazy, I'll use my stock 70 232, but put the 81-up manifolds on it, 
> with TBI. No custom pushrods, funny oiling issues, etc. I've got one all 
> hacked for the external oiling, too, but I could do the standard fix 
> that's on Matt's site.
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