Dave, list,
You ask 'where is my inch?' You have it, just don't see it.. Each cubic
inch break is allowed .999999....9 at the upper limit before jumping to the
bottom of the next class. For example; class D(261 - 305 ci) is allowed a
maximum cubic inch displacement of 305.999999999999...9.
Dan Warner
----- Original Message -----
From: Dave Dahlgren <ddahlgren@snet.net>
To: <land-speed@autox.team.net>
Sent: Tuesday, January 09, 2001 1:57 PM
Subject: Another great idea from the guy that brought you 300 e-mails on one
subject..
> This is long and may beg for the delete key so be warned..
>
> I have another great idea.. I know oh crap not this guy
> again.. But for those who like to race within a reasonable
> budget this will make sense although may be a nightmare for
> the rules guys..
>
> let me start with a couple of assumptions and yes i know how
> to parse the word into it's potential meaning.. seeing how
> this is a coed list will save the definition for another
> time for those that don't know or can e-mail me off list.
>
> 1. LSR racing is for the most part a hobby that is done for
> the love of it.
>
> 2. if you can find something inexpensive that is fun to
> drive and racey it has potential.
>
> 3. better if you can find engines that actually came out of
> something and don't cost a kings ransom then they might
> have some potential even better if many are around in
> salvage yards or they just made a zillion of them and don't
> cost a lot for what you might be able to turn them into. Oh
> this is an engine thing as i am an engine guy and want to
> know little about fenders and such as that is a whole other
> issue.
>
> So here goes with the great idea..
> The problem..
>
> Many of the engine size breaks are right on the same size of
> most commonly produced engines before they become 'used and
> cheap'. the bores are worn out they need pistons crank
> ground etc..
> The current solution..
>
> If you want to build a D engine for instance. 2 engines show
> great promise. A 320 chevy or a 302 FORD( I used caps
> because I like FORDS).. Most of these engines need an
> overbore of .030 or more to clean up the bore and pistons
> are available to .060 over as the blocks for the most part
> have a lot of iron in the walls. It is a cheap fix as
> pistons cost the same from stock to +.060 over.. BUT the
> gottcha is now the engine is too big. The current solution
> is to do 1 of 2 things. Look for a used block that will
> clean with a .010 or 0.020 overbore , buy a new block for
> 1000+ or buy a custom crank with a shorter stroke for 2000+
>
> These solutions are either incredibly time consuming or
> expensive. They also apply to most of the small inch stuff
> that is always viewed as 'cheap to race'. Most 2000 cc
> engines are around 1990 cc stock same with 3000cc I am sure
> there are a zillion 1498 cc engines too there are i sure too
> others that are larger that are right on the edge of the
> next class.
>
> A different solution...
> Allow an overbore not to exceed .060 ( that ought to fix the
> worst of the worst engines) so you can run a stock crank and
> save the 2000 or so bucks. For most engines this amounts to
> a few cubic inches. Some one with a calculator handy might
> and i am sure will add to this.
>
> This is personal for me and I won't hide that fact. I have
> no vested interest in the rotary deal i brought up but this
> i do. Keith just mentioned his crank is coming in from
> Bryant. It will be a nice piece i am sure, but an expensive
> one. If he could have bored out the 302 might have not
> needed the crank in the first place or at least not a custom
> stroke one to get under the size limit. I have been looking
> for a 3 liter engine for 2002. None to be found in my book
> because you can't freshen one up for a reasonable cost as
> they are for the most part 2990+ cc stock. If I do no more
> than a service station rebuild i am illegal.. I will grant
> you that most try a little harder than that but the concept
> is the same. There ought to be a way to allow so many cc's
> per cylinder for normal engine rebuilding. I have a 2000 cc
> ford block that is .002 over.. have a lot of time in it and
> it is junk.. just does not seem like it is a reasonable deal
> same with most of the small chevy and FORD guys out there.
>
> So the question is .. Is there anyway top have a bit of a
> window in engine size that precludes spending a ton of money
> to not be a few cubic inches over a set limit????
>
> Doing a little quick math with a 302 FORD as a starting
> point..
> stock is 301.44 with a 4 inch bore 3 inch stroke.
> D class limit is 305
> 302 with a .030 overbore .. real common is 306 oops no
> good.. 0.03% over
>
> 302 with a .040 overbore less common but safe is 307.5 1.5
> inches 0.09% over
>
> 302 with a .060 overbore and probably out of iron in the
> walls..310.55
> So the worst case is less than 2% .. and less than 6
> inches..
>
> The other question is there is 1 cubic inch between classes
> who owns that inch??
> a good example is G class.. up to 2.00 liter F is 2.01 liter
> to 3.0 Where are the 10cc's. I have a FORD 2 liter block
> that will clean at 2008 cc so it is not G or F..
> I was looking at an F engine from another car it is 3 cc
> under 3.0 liter it will clean at 3019 cc another 'black
> hole'.. would clean better at .020 over but that is too big
> for sure but never the less well under the range of FACTORY
> pistons..
>
> Anyone have any great ideas to fix this and help keep the
> cost of racing down??
>
> Just so no one feels left out the FORD examples work for a
> chevy 302 also... :>)
> Dave Dahlgren
|