Hot Rods ? For engine gurus, blower cam specs

That's what I thought.

 

My engine is different from yours in a lot of little ways. 406 SBC aluminum heads, lots of mods. But to chime in, I am running a 630 lift COMP roller cam. Works very well. A bit of a handfull on the street, but a terror on the strip. Maybe a good roller cam will bring it to life. You should have heart pounding, but puckering power with that SBC and 471. I also run a single 950 QuickFuel blower carb.

 

You should have heart pounding, but puckering power with that SBC and 471.

Awesome

 

If money is no object, there is Brezenski. they will do you a set of double-hump Dart heads.
There are also 400 blocks with only 2 freeze plugs, and you can do an internally balanced crank and just buy some 327 decals for the valve covers.
Good Luck!

 

So on the dyno I assume the afr's were all looking good during the pulls (like in the mid 12's)? It just seems to me like even a very mild sbc as yours with 6psi or roots blower stuffing through it ought to move an altered coupe as yours very well with a manual tranny and 4:11's. The rpm range sounds like an "rv" cam. Perhaps just a tad better than a stock general purpose sbc cam with a power curve meant more for improved torque rather than hp. A blower grind will help but it isn't necessary. You do want to try to increase lift while not adding too much overlap (the boost blows right on out the open exhaust valve) so keep the centerline 110* or higher. SBC's really start knocking down some impressive numbers when the heads are in the 300 cfm area and higher and the cam lifts surpass .600. Your heads would need so much work to approach that it'd be more cost effective to swap them out (I'd recommend AFR if you do). Increase the cam lift too much on your current heads and the guides and seats need machining with the new, stiffer, compatible springs.

For an inexpensive alternative I might install an Edelbrock Performer RPM cam/lifter/spring combo. While not specifically a blower grind, the spec's will work nicely and it'll rpm much better. Good lift for a stock headed sbc favoring the exhaust side, tight lobe centerline, broad power range with a ceiling of 6,500rpm. These camshafts increase power nicely in factory type, cast iron headed sbc's. Noticeable lope but not bouncing the doors off the pavement at an intersection.

FWIW

 

sorry for taking so long...
how much boost....way to much... 1:1 was 18! underdriven by 18% was tolerable at 15, but that's on a dyno, not what's seen day to day. Compression is 9.2 if i remember correctly.


Ok, i'm not really good with a camera....


click on the small pic

 

Its been a little over a month...just wondered if the cam ever got swapped and if it helped/hurt?