what exactly is a 327? Is it a 350 block with a 305 crank?

 

there was actually a 327 engine made back in the day. But it can be achieved with a 350 block and 283 crank I believe.

 

you can't make one with a 305 crank in a 350 block, that'd get you a 350 and if a 283 crank fit a 350 block that would get you a 302. what a 327 is is a 4" bore and a 3.25 stroke. all 327s were 2 bolts and all but the last ones were small journal cranks, but they were forged.

 

I am thinking crazy..was talking with some buddies of mine about engines and building a 302 and my mind is a jumbled mess...sorry about that

 

WHAT ABOUT 68-69 CRANK IN A 350 4 BOLT BLOCK ?

 

19 Year old thread 😀
Super thread Necromancy.

What about a 68-69 crank in a 350?
Don't quiet follow your question.

 

The 327 started out in 1963 - almost 60 years ago - as a small-journal 3.25" stroke and 4.00" bore.

Note the comment about almost 60 years ago and consider carefully what that means. It means that, if it was a person, it would very near looking for a RETIREMENT HOME.

In its latest couple of years, it got the large-journals crank and rod sizes.

Doesn't too much matter... it's a 350, except with less stroke.

IN 2021, we improve upon the 350, by ADDING stroke. We turn them into 383s because THEY MAKE MORE POWER.

In 2021, it costs roughly the same to build a 383, as a 327.

THIMK: Would you go to the grocery store and look at rib-eye for $18 a lb, and chuck at $12 a lb; and tell the butcher to cut you a half-pound of chuck, but price it as a full pound of rib-eye??? "Ummmm ... I really want to be different ... please give me a half-pound of chuck but charge me for a full pound of rib-eye, because ... I'm [sleeping sickness survivor] different. [sleeping sickness survivor] Would you? Really? RRREALLY ????

In 2021, that's what a 327 is. Wonderful nostalgia from before the 350 (and even better, the 400) was introduced; in 2021, WORTHLESS and OBSOLETE.

Put it out of your nightmares before A Fool And His Money Are Soon Parted.

 

You need to start wearing an alert bracelet so people can know about how you go into anaphylactic shock if exposed to a 327.

 

What Sofa said is 100% fact. The ONLY exception is if someone is restoring a collectible classic car that originally came from the factory with a 327 and wants to keep it original, in which case rebuilding a 327 would make perfect sense. Really doesn't apply to thirdgen F-bodies. And really wouldn't make sense to destroke a 350 for anything...

 

Actually the late 327 SBCs went to the "Medium" size Mains (350 SBC).

The Large size would be what the 400 SBCs used.

 

I LOVED the 327. Built a fair number of em at one time.

In the 70s.

In 2021, ... not so much.

It was The Best You Could Do in the 60s, but when the 350 was introduced, it was instantly outclassed. Once 350s started becoming widely available in the boneyards, the 327's reign was OVER.

Building one in 2021 offers NO advantage whatsoever, over newer, better-made motors. Particularly those made since the mid 90s, when GM finally realized it needed to clean up its quality control (which I would add, wasn't just GM; it was pretty much the same at all of the Big 3) There's simply no point in building a motor that's A HALF CENTURY old, as if human knowledge and capability has stood still for all that time. Cubic inches are still cubic inches and will ALWAYS be cubic inches, romantic $60,000 Barrett-Jackson L79 cars notwithstanding. Just dropping "a 327" in your car isn't going to make it one of "those".

 

Except for "Passion Projects", GM never really improved the QC process (since the 1970s).
They only got better at hiding the QC issues (I have Horror Stories that were just ridiculous).

Fortunately for us (Enthusiasts):
-The Vortec 350 was a big Passion Project for Chevrolet.
-The 4L80E was a big Passion Project for Hydra-Matic.
-The LS2 and LS3 were big Passion Projects for Corvette/ Chevrolet.

As well as others that we get to enjoy now, with our Cars/ projects.

 

For all of the SBCs (and leaving out vibrations and counter balancing)...
Disregarding the common opinions of Over-Square, Square. and Under-Square Engine arrangements for now:

As long as Piston speed does not come close to, or hit a given maximum mean speed...
Give it as much stroke as possible!
Keeping the Mass/ Bob-Weight down, will help.

People who do not build Engines get hung-up on Stroke...
Some then get hung-up on Rod to Stroke Ratio (and there are advantages to a longer Rod, but limiting RPM (only in extreme cases).
The Valve-Train is going to be the major factor!

Before I could afford to run a Blown, Injected, Alcohol Hemi...
I ran a 454 BBC with Two Holley Carbs.
Spec'd and built the Valve-Train to make peak HP around 10,000 RPM...
and no issues doing it!

On a side note:
The first time I assembled the Valve-Train, I was overly concerned with the Valve-Spring Pressures...
On my very first Pass, I cracked both Cylinder-heads from excessive Spring pressure!
LOL! But 10,600 RPM was not issue at all!