Dave
Don't the Motorcycle guys have a deal like this? I think its a .020" over
bore beyond maximum displacement for the class. This would allow the 302's
that your talking about. Also think its good for every scooter class but
Production
John Beckett
----- Original Message -----
From: "Dave Dahlgren" <ddahlgren@snet.net>
To: <land-speed@autox.team.net>
Sent: Tuesday, January 09, 2001 4:57 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
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