88 Police 350 specs

[Bob Valentine]

Same story here, found two 9C1 5.7l '92 Caprices a yard , but both had rags
wrapped around the oil fill to absorb the blowby.    Was thinking about one
as a nice roller-cam replacement for my truck but decided against it,
would have been a full-out rebuild.  

At least one donated a intake and TB with 65lb injectors....

-> Bob Valentine
-> bob at tecmark.com



At 05:59 PM 11/20/2000 -0800, you wrote:
>The 91 cop engine actually was a TBI engine AFAIK. I had the opportunity
to buy
>that one, but it was pretty worn & burned some oil.
>
>Eric D
>
>steve ravet wrote:
>
>> Had this problem in my S-10 V8 conversion for a long time ('91 cop car
>> motor).  Was caused by a bad knock sensor -- smashed while installing
>> engine.  Unfortunately it was impossible to get at until I had the front
>> diff out for unrelated repairs!  I have since replaced the knock sensor
>> (in a more accessible location) and all is well.
>>
>> The ECM runs a test when the engine is hot and TPS > 50%.  It advances
>> the ignition and expects to see knock.  If it doesn't it assumes ESC is
>> bad and sets a code.  On mine it would also use some kind of back up
>> timing, because after the check engine light came on the engine would
>> run very poorly, bad throttle response, temp gauge up 10-15 degrees,
>> etc.  Shutting off the engine would fix that, until the next time you
>> got in to the throttle.  The knock test is very painful to hear.  With
>> no knock sensor it lasts about a  second and sounds like the fan has
>> come loose.  Very audible knock.  In this conversion the knock sensor
>> was relocated to the (custom) motor mount.  Seems to work fine there.
>>
>> --steve
>>
>> Eric Deslauriers wrote:
>> >
>> > Hi all,
>> >
>> > Some time ago, I swapped a (carbureted) center bolt head police 350 into
>> > my TBI Blazer with the problem that a knocking code would get thrown
>> > after warmed up and > 1/2 throttle.
>> >
>> > I've been able to obtain what I believe to be the cam specs for that
>> > engine. This doesn't seem to be a huge cam.
>> >
>> > How does that compare to a typical 88 truck 350? I know the timing on
>> > the police motor is set at 6 degrees, while the truck wants 0 degrees.
>> > The police engine won't run in my truck unless I move the timing to 6
>> > degrees (backfires through the TBI - ouch). Why would that be?  FWIW, I
>> > had to reuse the distributor from the police engine since the cam gear
>> > is backwards from the regular distributor. Would this be related?
>> >
>> > <snip>
>> > police 87 and 88 are the same. they both had 8.2 to 1 compression, 4
>> > barrels, and duration 194*int.- 202*ext. (my guess is this duration is
>> > @.050). the lift is .384" int.- .404" ext.  112* lobe separation.
>> > replacement part number for crane cams is  104121
>> > <snip>
>> >
>> > Thank you,
>> > Eric D
>> >
>> >
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>> --
>> Steve Ravet
>> steve.ravet at arm.com
>> ARM,Inc.
>> www.arm.com
>>
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