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CIS vs CIS-E III wizardry sought
As the centerpiece to my Coupe's coming performance upgrades, I'm using a
2.3 5 cyl from an 87 or newer 5000. In reading the service training
manual for the new engine and injection, I'm wondering if the upgrade to
the newer stuff will be of any performance benefit. Granted, the knock
sensor is a desirable item, but it's quite a bit more work to change all
of this malarky compared to just using what I already have. So, the
questions begin:
1. Just how necessary is the knock sensor? In reading about it's
function, it seems it is just a sensor to switch the ignition map back
and forth. Won't I be okay in running premium fuel most of the time?
2. "Knock" seems to be the result of high temperatures. Is there another
way of reducing engine temp that would solve this?
3. The "E" system operates at a higher PRESSURE. Most of the advantage
from my reading indicates this is to avoid a vapor lock condition more
than to increase performance. Seems to me a higher VOLUME would be better
than pressure from a performance standpoint, so upgrading the injection
in this respect shouldn't make any real difference.
4. I'll be using a Schrick hydraulic cam. With the increased
displacement, 2mm larger valves and increased compression the stock
engine has gained 20 hp. Will the cam change itself provide a significant
horsepower boost, or is there something else that should be altered to
truly gain benefits from the cam? I am planning on significant porting
work, but I'm questioning more the valve size and fuel delivery aspects.
My goal is 160+hp, nothing silly. I appreciate everyone's help and
figured you all would enjoy the challenge <g>
--
Dwight Varnes To err is human, to forgive is
70 Fiat 124 Spider canine.
67 Fiat Dino Coupe Americans are mongrels--so why
86 Audi Coupe GT would we want purebred dogs?
89 VW Jetta GLI 16v Adopt from your shelter!