427 Side-oiler - approx. horsepower?

[Gunner]

Originally Posted by dcdoug

I have an NOS 427 SO block and steel crank (standard bore and stroke), NOS medium riser heads (not ported), NOS LeMans rods and TRW pistons (11:1), "B" cam, blue thunder intake, Holley 750.

I'm looking forward to the dyno results.

Of course, I look forward to finding an NOS SO block in a flea market, too...

[patrickt]

Originally Posted by Gunner

I'm looking forward to the dyno results.

Of course, I look forward to finding an NOS SO block in a flea market, too...

I think Doug's engine dyno numbers will give an honest representation of what an unmolested/unmodified SO block really made. Granted his has the bigger "B" cam, and over on the SAAC site there's a chart that says Shelby tended to use the "K" cam, but I don't know if all that's true or not. Ron would know, though -- I don't know why they wouldn't have used the "B" cam on the track anyway. Maybe the "K" cam was only on the street.

EDIT -- I looked at the chart again, the "B" cam was used quite a bit. http://www.nvsaac.com/shelbyparts/camshafts.htm

[dcdoug]

Originally Posted by patrickt

I think Doug's engine dyno numbers will give an honest representation of what an unmolested/unmodified SO block really made.

I think the Blue Thunder intake is supposed to flow better than an original sidewinder although it is pretty true to the original design, but other than that, should be pretty close. Not sure on the size of the Holley on the single 4bbl cars either, but I'm sure someone knows that.

[Anthony]

Originally Posted by dcdoug

I think the Blue Thunder intake is supposed to flow better than an original sidewinder although it is pretty true to the original design, but other than that, should be pretty close. Not sure on the size of the Holley on the single 4bbl cars either, but I'm sure someone knows that.

Of all the dual planes, the blue thunder in general makes the most power, more than the sidewinder and performer rpm, but not by much.

From my understanding, the original carburetors were 780cfm vac secondary, but many racers bought /upgraded to the 850 cfm. I'm running a Holley List # 3255-1 (780 cfm), 3255 was for MR engines, 3255-1 for highrisers, as original equipped on crate engines. 3259 (735 cfm) for 289 HiPo's. I'm sure there were other carbs as well

[dcdoug]

Originally Posted by Gunner

I'm looking forward to the dyno results.

Of course, I look forward to finding an NOS SO block in a flea market, too...

One of the fun things about Dwight was that he had NOS 428 and 427 blocks (supposedly the 427 blocks were unused NASCAR blocks that were left over after they changed the rules) stacked around like cord wood. Lots of other NOS parts too - one of the reasons I couldn't resist going with a more original build despite weight and other "disadvantages". Funny, regardless of the HP I am actually making, I don't feel underpowered.