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Indy single plane 4500 manifolds #2097146
06/24/16 12:56 AM
06/24/16 12:56 AM
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408strokerdart Offline OP
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Has anyone done any back to back testing on the 440-3 RB compared to the bigger 440-3X RB? Just wondering about the findings.

Re: Indy single plane 4500 manifolds [Re: 408strokerdart] #2097160
06/24/16 01:23 AM
06/24/16 01:23 AM
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moparniac Offline
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I have not, if you want and I'll pay the shipping both ways.... Try my intake out.


Mopar Performance
Re: Indy single plane 4500 manifolds [Re: 408strokerdart] #2097165
06/24/16 01:29 AM
06/24/16 01:29 AM
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I think AndyF has, maybe not confused I've dyno tested motors with both but not on the same motor shruggyI think the 3X is for large C.I. motors, probally above 511 C.I. confused shruggy
the one motor I assembled and dyno tested the 3X was a 4.5x4.5 World block with right at 15.0 to 1 compression on race gas, it had uneven fuel distribution problems on # 2 and #7 cylinders according to the EGT and spark plugs work Bob Goerge could, and can, probally fix that up scope

Last edited by Cab_Burge; 06/24/16 01:33 AM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Indy single plane 4500 manifolds [Re: moparniac] #2097248
06/24/16 10:00 AM
06/24/16 10:00 AM
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408strokerdart Offline OP
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Originally Posted By moparniac
I have not, if you want and I'll pay the shipping both ways.... Try my intake out.


I am running mechanical Alky injection so it's not as simple to just try one out (has to have tapped intake ports). Thanks for the offer though.

Re: Indy single plane 4500 manifolds [Re: Cab_Burge] #2097251
06/24/16 10:02 AM
06/24/16 10:02 AM
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408strokerdart Offline OP
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Originally Posted By Cab_Burge
I think AndyF has, maybe not confused I've dyno tested motors with both but not on the same motor shruggyI think the 3X is for large C.I. motors, probally above 511 C.I. confused shruggy
the one motor I assembled and dyno tested the 3X was a 4.5x4.5 World block with right at 15.0 to 1 compression on race gas, it had uneven fuel distribution problems on # 2 and #7 cylinders according to the EGT and spark plugs work Bob Goerge could, and can, probally fix that up scope


Hi Cab. I believe the X manifold is more effective on larger CID engines, but Indy says it is a power booster on engines below 600cid as well as being suited for engines above that displacement.

Re: Indy single plane 4500 manifolds [Re: 408strokerdart] #2097300
06/24/16 11:31 AM
06/24/16 11:31 AM
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I think it depends on the cubes and power level.

I did the test years ago on a 557 with mildly ported 440-1's.
This motor was only making around 725hp.
I tested the 440-3, 440-3x, and 440-25 X-ram with in line 2 x 4bbl top.
On that motor the 440-25 was best, by about 20hp.

The -3 and -3x were nearly identical.

A few years ago we ran a 505 with some MM ported -1's on it, 750hp range, tried the -3 vs -3x and got the same results....... No real difference.

I'd say if you're at 540+ cubes and solidly into the mid-800hp range, that's when the 3x will start to show what it can do.

The only motors I've used them on had 572-13 heads, and both of those run pretty well, but I never ran any other intake on them.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Indy single plane 4500 manifolds [Re: fast68plymouth] #2097303
06/24/16 11:35 AM
06/24/16 11:35 AM
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408strokerdart Offline OP
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Originally Posted By fast68plymouth
I think it depends on the cubes and power level.

I did the test years ago on a 557 with mildly ported 440-1's.
This motor was only making around 725hp.
I tested the 440-3, 440-3x, and 440-25 X-ram with in line 2 x 4bbl top.
On that motor the 440-25 was best, by about 20hp.

The -3 and -3x were nearly identical.

A few years ago we ran a 505 with some MM ported -1's on it, 750hp range, tried the -3 vs -3x and got the same results....... No real difference.

I'd say if you're at 540+ cubes and solidly into the mid-800hp range, that's when the 3x will start to show what it can do.

The only motors I've used them on had 572-13 heads, and both of those run pretty well, but I never ran any other intake on them.


This application will be a 572 with 440-1 345CNC heads on alky making around 950ish hp. Just wondering if it is worth it to go to the "X" version of this intake before investing in the machine work for the injectors and port divider work.

Re: Indy single plane 4500 manifolds [Re: 408strokerdart] #2097382
06/24/16 01:43 PM
06/24/16 01:43 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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I don't know how much different it would be, but I think I would use the 3x on that combo.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: Indy single plane 4500 manifolds [Re: fast68plymouth] #2097468
06/24/16 03:23 PM
06/24/16 03:23 PM
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408strokerdart Offline OP
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Originally Posted By fast68plymouth
I don't know how much different it would be, but I think I would use the 3x on that combo.


Thanks. That is what I'm thinking also.

Re: Indy single plane 4500 manifolds [Re: 408strokerdart] #2097556
06/24/16 07:03 PM
06/24/16 07:03 PM
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Oregon
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I've run them back to back on a 900 hp engine and didn't see much difference. Typically the 3X hasn't worked very well on anything I've run. I switched to a Super Victor and picked up power on my engine.

Re: Indy single plane 4500 manifolds [Re: 408strokerdart] #2097596
06/24/16 08:41 PM
06/24/16 08:41 PM
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Las Vegas
Al_Alguire Offline
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From my experience the 3X is for a big HP big cube deal. Otherwise it is more plenum than smaller engines need. The 3X is pretty close to a B1 intake and treat it as such. It does not belong on a typical bracket motor especially if someone has done work to the plenum for sure. I have each ere for our drasgter


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