Hello again guys;
I've just hauled my engine apart and installed my new camshaft (LS-6 copy), and I am looking at changing my intake, but I only have one spare. The funds have to be routed somewhere else, so it would be great to have some imput here. One is a holley strip dominator, which seems so be good and all, but I've been reading of about how single planes and the street sort of clash a bit. The other is the original hi-rise cast iron 69' intake. I know an edelbrock performer would be the best, but its just not in the budget yet. The 402 isn't a sloutch, on top of the cam it has trw 2242 11:1 pistons, ported and polished heads, enlarged valves, positive seals, and is balanced and blueprinted. Oh yeah, both intakes are ported to the heads. I know the single plane wouldn't be best for the street, but would its street capabilities still out perform the cast iron dual plane, or would the later be the better choice? Thanks again.

I will hazard a guess and say that your stock, cast-iron high-rise if it is a square bolt pattern for a Holley should do fine for a street engine, imho..

I want to add that I figure a good old CC 282S solid cam just may be better for you at 282/236, 110/106, around .540" lift lashed..

pdq67

Hello again guys;
I've just hauled my engine apart and installed my new camshaft (LS-6 copy), and I am looking at changing my intake, but I only have one spare. The funds have to be routed somewhere else, so it would be great to have some imput here. One is a holley strip dominator, which seems so be good and all, but I've been reading of about how single planes and the street sort of clash a bit. The other is the original hi-rise cast iron 69' intake. I know an edelbrock performer would be the best, but its just not in the budget yet. The 402 isn't a sloutch, on top of the cam it has trw 2242 11:1 pistons, ported and polished heads, enlarged valves, positive seals, and is balanced and blueprinted. Oh yeah, both intakes are ported to the heads. I know the single plane wouldn't be best for the street, but would its street capabilities still out perform the cast iron dual plane, or would the later be the better choice? Thanks again.

Use the strip dominator intake of the two listed. The other will only help below 3000 rpm. All our street/strip motors always made more power from 3000 up with a open intake.

I'm running the Holley on my 427, no problems on the street.

i would say sell both intakes and take the money and buy a eddy rpm intake well worth it on a small bbc.

i have ran the torker style, low rise cast iron units and high rise cast iron units and the performer alum. and the victor jr and the street master intakes and maybe a few others i cant think of at the moment and the eddy rpm intake seems to take the cake on a street car. the victor jr was a stout intake it sure worked well with the nitrous and 850 holley but it sure seemed like the bottom end always suffered a little in a street car. victor jr ran well from about 4000 up. not sure how that holley strip compares to the victor jr thou.

Being a single four barrel, mostly street performance kind of guy all my life, I can tell you single plane intakes have let me down most of the time. Although I have seen some of my own engines make more power on the dyno with the single plane above about 4000, I have had the best real world performance with the RPM dual plane. And that includes time slips.

I don't know why the higher HP of the single plane doesn't make my street car faster.

i would say sell both intakes and take the money and buy a eddy rpm intake well worth it on a small bbc.

Ditto...It will help out giving you more torque...

I never thought of that, I figured no one would want that holley intake. It seems that they do not go for all that much on ebay. Thanks for your imput guys.

I never thought of that, I figured no one would want that holley intake. It seems that they do not go for all that much on ebay. Thanks for your imput guys.
As I said I run the Holley now but have a new RPM that will be going on when I get around to the resto, the RPM is also more stock looking.

The RPM is also more stock looking.

Grind off the Edelbrock and RPM on the front, and it almost passes for stock. Real cool. I have an oval port RPM intake on the 396 that came with my car that I did like that.

MILD MOTOR HERE!!

Like I said earlier your stock 4-barrel intake will do nicely for you, imho, unless you just want to step up!

Then step up to an RPM..

And don't forget what I said about the good old CC 282S solid lifter cam too..........

pdq67

MILD MOTOR HERE!!

Not too many people stop with a mild motor. As everyone knows, it is just the start to feeding the power crave.

Might as well jump to the RPM, won't hurt at all.

On the street you will be more satisfied with the dual plane. Throttle response will be a lot better and low to mid rpm performance (torque) will be better than the single plane. The latter will make more power above 4,000 but in a street car you will spend 95% of your time below 4,000. So the dual plane will run better for a lot larger percentage of your driving. Plus I have never liked single planes on big blocks, till they become big displacement radical units. Your motor is not this radical. and is one the small side of displacement. just my opinion. Bill

And I'm with Bill here..

pdq67

I'm using the Edelbrock RPM on my 505 thats been gasket matched and had some porting done to it,with a one inch open spacer and a 3/4" nitrous plate on top. It works for what I do, <6500 rpms.