Re: 13-1/2 to 1 compression ...on the street?

N8N wrote:
> On Apr 30, 4:24 pm, "Steve W." <csr684...@[EMAIL PROTECTED]
> wrote:
>> John Kunkel wrote:
>>> "wstiefer" <wstie...@[EMAIL PROTECTED]
> wrote in message
>>> news:Nl0Sj.12289$2g1.2583@[EMAIL PROTECTED]
>>> Alcohol
>>> My thought, too. If the CR is actually that high I can't see it ever
running
>>> on pump gas regardless of the heads, cam, etc.
>> Why not? NASCAR runs 12.5:1 on 98 octane using iron heads. They ran
13:1
>> on the old 105 octane leaded fuel. I have run 13:1 on pump gas with
>> aluminum heads on a 427 with a set of Rhodes lifters to drop the cam
>> down some. No problems at all.
>>
>> --
>> Steve W.
> 
> I would think the Rhodes lifters would actually hurt, not help -
> they'll improve idle quality but at the cost of increased low RPM
> cylinder pressures.  or am I thinkin' wrong?
> 
> I will say that at anything over 10.x:1 you probably need to have
> someone GOOD (not me!) tune the engine to avoid an inadvertent
> detonation incident.
> 
> nate
> 
> (currently running 10.25:1 with iron heads - stock 63-64 spec
> Studebaker R1 engine...)

No real pressure increase. You just need to play with the bleed rate 
some. Mine was set up to "hide" the real power of that engine. The only 
problem I ever had with it was that I kept putting my foot through the 
firewall....

Tuning of a true HP engine is an art. Not something you get from books 
or online.

-- 
Steve W.
Near Cooperstown, New York