Let the beating begin

Aftermarket block, heads, and rotating ***embly is the way to go - 400+ CID out of the box, and no hinky stuff with 30 year old parts that were not made well to begin with, and have probably already been machined 1 or 2 too many times and who knows how they have been abused. The blocks aren't too expensive, the rotating ***emblies are cheaper than the machine work required to mix-n-match the old OEM parts, and the cheapest aftermarket heads are better (for $500 or less) than you can get with a any port job on the best stock heads.

If you want to build that kind of HP out of production block and rotating ***emblies, you really want to stay away from anything with a bow-tie if you expect it to last. Not trying to be a jerk, but Chevy and big power only go together with either all aftermarket parts, or lots of spares.

As for the stroke, more cubic inches = more power, all other things being equal. Short stroke engines free rev faster, giving them an advantage in situations where you are downshifting during the race (like road racing and sometimes circle track racing). They don't rev higher, unless you have an airflow restriction. A longer stroke engine requires more air to rev to the same RPM, because you have more space to fill with air / fuel mix, but then you make more power for your trouble. With the same airflow, the longer stroke engine will make about the same HP, but at a lower RPM due to more torque, and with a wider, flatter power curve.
When in doubt, remember that we have gotten Caddy's to spin over 7500 RPM with a stroke of 4.425" (and stay together). If you feed it, it will spin. If you have to reduce the stroke to get the RPM you want, that means you have an airflow problem.

We have slightly thinner air here than at Bonneville. We can just dyno Bonneville engines with no correction factor for al***ude to get a pretty realistic idea of how it will perform on the salt. You not only lose 30% of your power at any given RPM, but the power band loses about 400-1200 RPM depending on the combination.

Also, if you are running mechanical injection, remember that while you may be able to get it to run OK at low al***ude without a high-speed-lean-out circuit, you will need one at high al***ude, or you will lose more RPM, plus make less power for about the top 1/2 of the power band you have left.
Al***ude will do terrible, awful things to your powerband be prepared.

 

<TABLE cl***=tborder id=post3260593 cellSpacing=0 cellPadding=6 width="100%" align=center border=0><TBODY><TR><TD cl***=thead style="BORDER-RIGHT: #e5e5e5 0px solid; BORDER-TOP: #e5e5e5 1px solid; FONT-WEIGHT: normal; BORDER-LEFT: #e5e5e5 1px solid; BORDER-BOTTOM: #e5e5e5 1px solid"><!-- status icon and date --> Today, 11:55 AM <!-- / status icon and date --></TD><TD cl***=thead style="BORDER-RIGHT: #e5e5e5 1px solid; BORDER-TOP: #e5e5e5 1px solid; FONT-WEIGHT: normal; BORDER-LEFT: #e5e5e5 0px solid; BORDER-BOTTOM: #e5e5e5 1px solid" align=right> #46 </TD></TR><TR vAlign=top><TD cl***=alt2 style="BORDER-RIGHT: #e5e5e5 1px solid; BORDER-TOP: #e5e5e5 0px solid; BORDER-LEFT: #e5e5e5 1px solid; BORDER-BOTTOM: #e5e5e5 0px solid" width=175>kustombuilder

YOU feel better now ? goooooooooooood !!!!!!!!
<TABLE cl***=tborder id=post3260790 cellSpacing=0 cellPadding=6 width="100%" align=center border=0><TBODY><TR><TD cl***=thead style="BORDER-RIGHT: #e5e5e5 0px solid; BORDER-TOP: #e5e5e5 1px solid; FONT-WEIGHT: normal; BORDER-LEFT: #e5e5e5 1px solid; BORDER-BOTTOM: #e5e5e5 1px solid"><!-- status icon and date --><!-- / status icon and date --></TD><TD cl***=thead style="BORDER-RIGHT: #e5e5e5 1px solid; BORDER-TOP: #e5e5e5 1px solid; FONT-WEIGHT: normal; BORDER-LEFT: #e5e5e5 0px solid; BORDER-BOTTOM: #e5e5e5 1px solid" align=right></TD></TR><TR vAlign=top><TD cl***=alt2 style="BORDER-RIGHT: #e5e5e5 1px solid; BORDER-TOP: #e5e5e5 0px solid; BORDER-LEFT: #e5e5e5 1px solid; BORDER-BOTTOM: #e5e5e5 0px solid" width=175>
</TD></TR></TBODY></TABLE>
So listen .......****-YOU .........
</TD></TR></TBODY></TABLE>


Engine Pro 5X<SCRIPT type=text/javascript> vbmenu_register("postmenu_3260790", true); </SCRIPT>
Alliance Member

Thanks ,I couldn't have explained it any better way...........

Was way to tired last night and just wanted to unwind....do some reading and get some rest..................

 

What size engine??? I thought you wanted to make real HP. 600-650HP is pretty easy to make and 7,500 rpm is pie.

Dont use any 23 degree ******** heads because they just dont flow enough. You can make easy HP with some CFE 15 degree heads and 7,500 rpm is no problem.

I would use a Callies crank, Oliver rods, CP JE ROSS BME pistons would be just fine, Dry sump oiling, Dart block, CFE 15degree heads, shaft rockers, plenty of brg clearance, roller cam-spec depend on application.
and the list goes on.

-E.C.

 

I should've amended that: Myself excluded, there are no dumb questions...

 

Actually, the 3rd mile is not called the "middle mile" - that would be the 4th mile. See, on the long course, you get timed from the 2 to the 3 ("first mile"), the 3 to the 4 ("middle mile") and the 4 to the 5 ("last mile").
(Until you exceed 175mph, you get to play on the short course, where you are timed between the 2 and the 3.)

And, you are absolutely right, it's all about gearing. And tire size. And raw horsepower. Now get your dream wheel out . . .

 

I'll amend that: Myself excluded, there are no dumb questions...

But hey, how else do you learn? We were all there once.