No expertise here. Two years ago we blew up 3 Datsun 1600 (R16) blocks
before we lowered the rpm's on the rev limiter. But, in an effort to learn
from our mistakes, we are working the rev's back up as we try different
things to get more oil to #3 main. We have gotten back about 300 rpm's
without mishap last year. More testing this year, hopefully without
ventilating any more blocks!
Paul
-----Original Message-----
From: Gt6steve@aol.com <Gt6steve@aol.com>
To: haynes386@netzero.net <haynes386@netzero.net>
Cc: vintage-race@autox.team.net <vintage-race@autox.team.net>
Date: Saturday, April 14, 2001 6:03 PM
Subject: Re: Engine limits?
>Mark, that's a fascinating question and one of the coolest I've seen here
in
>a while. I like it because I'd like some of our knowledgeable experts to
>expound on things like limiting main bearing oil to benefit rods and what
the
>bearings can tell us about RPM's and crank whip. The expertise is on this
>list but usually it's left for us to learn by blowing it up and then trying
>to do less of that next time.
>I hope you get some intelligent answers. Steve
>
>
>> I have a question for those of you who have experience with testing an
>> engine's limits (hopefully I can avoid finding the upper limits for
>> mine).
>> How do you establish an upper rev limit for an engine? and what
>> factors determine where you set your rev limiter?
>> Case in point is this...I have a '62 Austin XSP motor (built for
>> Formula Junior). It was the factory"cheater motor" for the 1100cc limit.
>> It's' built on the 948 base-crank has 1 3/4" journals, and 3.00"stroke,
>> it's cross-drilled and has flow restrictors in the oil passages. To
>> achieve the 1100cc's, the factory (Eddie Maher & co.) bored these motors
>> to 2.65"-giving a displacement of 1096cc. It's got the 1100
>> full-floating rods, but they're not lightened, and an AEA649 cam, and
>> all of the go-fast period parts. When I build it, How do I establish how
>> high to rev it?(and not blow it). I can't find anyone who used to race
>> them who remembers what they used for an upper limit. I know that the
>> 1275s have a tendancy to snap cranks,and I really don't want to do this
>> either.
>> I'm planning on putting it in my '62 Sprite, I know the 1275s will
>> eat me up,but $#%@ happens
>>
>> TIA, Mark Haynes
>> RMVR
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