REDLINE ON A 3.4L DOHC Idling 747

[Programmer]

Hmmm...we're running a 4.165 bore with 3.480 stroke--this "formula" limits
the max RPM to just over 6890. The driver doesn't even shift this thing till
7200...guess I'll have to let him know he's gone beyond the grenade limit
<G>...
Lyndon IPTECH
-----Original Message-----
From: CSH-HQ <nacelp at jvlnet.com>
To: gmecm at efi332.eng.ohio-state.edu <gmecm at efi332.eng.ohio-state.edu>
Date: September 5, 1999 8:33 AM
Subject: Re: REDLINE ON A 3.4L DOHC Idling 747


>So my ole 3"stroke 4"bore 302 chev is good till 8,000 rpm.  Whew, that will
>save alot of machine work knowing that.
>  Maybe that 24,000 is an imaginary wishamacallit....
>Grumpy
>
>If your six cyl runs like it has a miss, do a leak down test.
>If fine then diable IAC, and EST, or go open loop and see if it's cured.
>Need to isolate if in EFI, or engine design.
>TB might not have enough velocity to feed outside cylinders.
>Cylinder load test with IAC, EST opened.
>
>>>>
>>>> If you want a simple answer, use 24,000 divided by the stroke in inches
>>>> as an upper limit provided the oil pump can produce 10 psi/1000 rpm.
YMMV.
>>>
>>>24000 / 3.312 = 7246 RPM
>>>
>>>> If you really want to know, find a copy of "The High Speed Internal
>>>> Combustion Engine" by Ricardo. "Internal Combustion Engines" by Obert
isn't
>>>> bad but I do not care for Lichty's book of the same name.
>>>
>>>Two machinist / mechanical engineer type guys have examined this motor.
>>>One says it will grenade at 8500 RPM.  The other says 8600 RPM.
>>>
>>>--
>>>Ludis Langens                               ludis (at) cruzers (dot) com
>>>Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
>>>
>>>
>>      A. Padgett Peterson, P.E. Cybernetic Psychophysicist
>> Anti-Virus, Cryptographics, & Antique Radio Researcher
>>http://www.freivald.org/~padgett/index.html
>> mailto:padgett at gdi.net     PGP 5.5 Key on request
>>
>
>