Small block cylinder head question

[rumblefish360]

NO! Because mine is back in the box pending Mo-Money!

LMAO!!!!

 

[rumblefish360]

Nice choice

No doubt!

I still like the 6 pack.

 

[D.Coulter]

 

[Cope]

Ya'll is wrong.

Orange is the fastest color, look it up...

The Duke boys ran orange for a reason...


If I had a nickle for each time I seen that six pack pic (out of a car) I could build one...

Here's my new choice... for the zero cents worth...

 

[rumblefish360]

If I had a nickle for each time I seen that six pack pic (out of a car) I could build one....

 

[Cope]

If you want stupid fast call Enderly....

 

[skrews]

Some will argue the subtle differences, but IMO no real difference between J and X performance wise. As others have mentioned Edelbrock or some knock off of them will run better, especially if competently ported.

 

[furrystump]

I don’t consider 40-50 hp a ton on a fast car. Indicated by only 2/10ths. But it is significant.
The faster you go, the less 50hp means, as you know.
Your intake swap yielded no results? Then, IMO, that is the break point between which one it is you need. The future attempt to go faster may show a single plane as the intake to use.

As we know, It’s all in the combo, what ever the engine /car likes, that’s what you use.

On a 1000 hp car 50 hp is not a bunch, but if you run against cars that make 1000 hp its very significant. I get paired with a car and we swap wins back and forth. I’d give my left arm for 5 hp!!!

 

[rumblefish360]

On a 1000 hp car 50 hp is not a bunch, but if you run against cars that make 1000 hp its very significant. I get paired with a car and we swap wins back and forth. I’d give my left arm for 5 hp!!!

True! I won’t argue that. But I also still stand by what I wrote. If I had two identical 1,000+ HP cars but with one making 50hp more than the other one, you would never know the difference. And the difference gets smaller and smaller as the HP goes up.

 

[flyfish]

I went from an airgap to a single plane( weiand excellerator) on a flat tappet 416 that ran 10.70’s at 3350 pounds and saw next to nothing ET wise( maybe couple or 3 hundreds). Stage 2 Hensley ported eddies, TTI step headers, 727.
Thats been my experience pretty much generally with intake swaps. Unless the one coming off was ultra wrong for what was going on, all i have ever seen is very minimal differences. Or none.
2 whole tenths is 40 or 50 horsepower on a 10 second car. Thats a ton. My 416 i only ran 6600 max and the car was relatively heavy so the dual plane wasnt hurting much.
I ran a 1025 race demon on that combo, nicest carb i have ever owned, i was stupid getting rid of it.

I would have to dig through the archives to find the exact ET numbers, but I believe the intake swap probably only helped out maybe ~20hp ish. The car just ET'ed better with that intake on my combo probably due to my narrow RPM range (5k converter, and shifted between 6200-6500 RPM). Driving around town you could tell that the Air-gap made more torque down low, and throttle repose was sharper (if that makes sense).

Not trying to nitpick, but if I picked up 40-50hp for every 2 tenths (assuming 500hp to go 10.99) I would need 700-750hp to go 9.99...that doesn't add up.

 

[B3422w5]

True! I won’t argue that. But I also still stand by what I wrote. If I had two identical 1,000+ HP cars but with one making 50hp more than the other one, you would never know the difference. And the difference gets smaller and smaller as the HP goes up.

You certainly would know the difference.
Charlie Wescott entered SS/ AH racing from nowhere and quickly had a tenth or tenth and a half on the whole class.
Its because he found 30 or 40 horsepower others didnt.
Prostock is the same way. Suspension or horsepower( mph) being just enough to have 6 or 8 on everybody else is enough to dominate.

 

[rumblefish360]

You certainly would know the difference.
Charlie Wescott entered SS/ AH racing from nowhere and quickly had a tenth or tenth and a half on the whole class.
Its because he found 30 or 40 horsepower others didnt.
Prostock is the same way. Suspension or horsepower( mph) being just enough to have 6 or 8 on everybody else is enough to dominate.

You would know because you put it to the time clock. Drive the car without a clock or on the street and you’ll never know. Gamble on it and I’ll own your house.

 

[B3422w5]

I would have to dig through the archives to find the exact ET numbers, but I believe the intake swap probably only helped out maybe ~20hp ish. The car just ET'ed better with that intake on my combo probably due to my narrow RPM range (5k converter, and shifted between 6200-6500 RPM). Driving around town you could tell that the Air-gap made more torque down low, and throttle repose was sharper (if that makes sense).

Not trying to nitpick, but if I picked up 40-50hp for every 2 tenths (assuming 500hp to go 10.99) I would need 700-750hp to go 9.99...that doesn't add up.

Yea, in hindsight i think i am way off base saying 20-25 horsepower per tenth. More like probably 10-15 per tenth.
Really nice gain though going to the victor. I plan to run one on my 418. Havent tried on my 360

 

[furrystump]

True! I won’t argue that. But I also still stand by what I wrote. If I had two identical 1,000+ HP cars but with one making 50hp more than the other one, you would never know the difference. And the difference gets smaller and smaller as the HP goes up.

Agreed and harder and harder to find.