Big Block Intake Manifolds

[sst1988]

hi, i like to know if there is a diffrents in the 4150 & 4500, besides the hole location. I used the 4150 with a dominator, am i losing horsepower or proformance? thanks.

[Awesome Bill]

Actually the 4150 with the proper adaptor makes more power with the proper size engine to carb. Just what are you talking about loosing power? Explain

[sst1988]

Thanks bill, what i want too know is it ok to have a dominator on top of the 4150? or should of i bought the 4500 instead? I was told that this manifold was hurting the proformance, that the 4500 would of been better? I do not believe this is true.:confused:

[want-a-be]

Actually the 4150 with the proper adaptor makes more power wiht the proper size engine to carb. Just what are you talking about loosing power? Explain

Bill is correct with this. I have seen the Dominator intake put on the wrong application and just kill it's HP. Same engine woke back up with the 4150 intake and the adapter.

What max PRMs are you wanting to see? Like Bill also said , everything has to mach the application.

What kind of engine are we talking about? Some specs would help on the decision making.

Don

[sst1988]

Bill is correct with this. I have seen the Dominator intake put on the wrong application and just kill it's HP. Same engine woke back up with the 4150 intake and the adapter.

What max PRMs are you wanting to see? Like Bill also said , everything has to mach the application.

What kind of engine are we talking about? Some specs would help on the decision making.

Don

498bbc pg, 456 gear, 13.5 comp,dart pro 1 345, 748 lift roller, about 7100 at the line.

[want-a-be]

Wanting to stay under the 7500 rpm range I wouldn't think a dominator intake would pick you up...jmo of course though. Maybe if you were in the 582 and up in cubes you'd see a gain. Under 540 though I would stay with the smaller intake and adapt.

Don

[Awesome Bill]

Have you actually run the car yet? Why are u using a 4.56 gear ratio, unless its 1/8 mile or you have a 35" tire. 700-775 hp is no problem with that application with the proper heads. The manifold you have will actually work way better than the 4500!
1/8 or ¼ mile, tire size, weight of car, actual e.t., Crossing line rpm right now, shift points, transmission, converter, header tube size and length of primary tubes, collector size, mufflers?, size of fuel line and pump, tank or cell, street car? race car?

[sst1988]

Have you actually run the car yet? Why are u using a 4.56 gear ratio, unless its 1/8 mile or you have a 35" tire. 700-775 hp is no problem with that application with the proper heads. The manifold you have will actually work way better than the 4500!
1/8 or ¼ mile, tire size, weight of car, actual e.t., Crossing line rpm right now, shift points, transmission, converter, header tube size and length of primary tubes, collector size, mufflers?, size of fuel line and pump, tank or cell, street car? race car?

1/4,- 14.5/32-,2930,- best 10.01- 10.teen's -,7100-,6500-, pg/5600tci- 2 1/8-?-, 2 1/8x4"-, no , 10AN-, BG400-, cell, race. I had a 488 gear in it and was told that the 456 would pick up mph? i thank you may be right with about 700 or 750 hp. thanks.

[Awesome Bill]

1/4,- 14.5/32-,2930,- best 10.01- 10.teen's -,7100-,6500-, pg/5600tci- 2 1/8-?-, 2 1/8x4"-, no , 10AN-, BG400-, cell, race. I had a 488 gear in it and was told that the 456 would pick up mph? i thank you may be right with about 700 or 750 hp. thanks.

Wow, your only making 540 hp at the best. Your not even close with this. Your combination is way wrong. You need a torque converter and that thing will take off. Your loosing way over 10% of the converter which is causing you to be over peak hp really quick. If you want to get that fixed let me know. We also sell proper torque converters that don't break either. I used 133 mph with the 32" tall tire and come up with around 6300 with no slippage, if your going threw @ 7100, that is way over where you need to be. Just thought you should know your throwing away a bunch of power!

[want-a-be]

What duration are you running? Where is the cam installed at? Whats the cams LSA? What intake are you running now? What carb are you running the 10s with? Are you running power valves? If so,...what vac are they rated for? What vac are you running at an idle? How high are you running the floats in the carb? What do the spark plugs look like? What does the exhaust ports look like? Do you have any discoloring in the intake manifold? How much timing? Initial? What ignition are you running?

What rear suspension are you running? What kind of from suspension are you running? I'm with Bill on the converter sounds off to me also.

Don

[sst1988]

Wow, your only making 540 hp at the best. Your not even close with this. Your combination is way wrong. You need a torque converter and that thing will take off. Your loosing way over 10% of the converter which is causing you to be over peak hp really quick. If you want to get that fixed let me know. We also sell proper torque converters that don't break either. I used 133 mph with the 32" tall tire and come up with around 6300 with no slippage, if your going threw @ 7100, that is way over where you need to be. Just thought you should know your throwing away a bunch of power!

AB, what converter do you think i need?

[5150skullz]

I think your heads are a bit big for your CID. A 325cc head with a dart oval port 4150 intake and a moroso 4150-4500 adaptor matched to the intake would be the trick.

[Awesome Bill]

AB, what converter do you think i need?
That would be a 8" depending on your actual engine torque and hp. There is most likely something way wrong with your combination being your only making 540 or so hp. Most BBC of that size do not require any more gear than 4.10. So you can actually start using some of the power instead of the crazy rpm you have now. 1/8 mile, that gear is o.k. as long as you stay under the 7500rpm range. The heads are a little large but with the right cam, it will make good power up to 8000rpm with proper valve train components. Most peoples power losses are from converters that slip very badly. Any BBC 496 with your combination will make 750 hp. And the 4150 top will work the best.