Might this be a good intake for 4150-to-4500 conversion?

[BradH]

Just another one of those lightbulbs that flip "on" in my head...

If I get serious about trying a 4500-type carb vs my current 4150 options, would the Trick Flow 4150 intake that I have now be a good candidate for doing to the plenum & mounting pad conversion to turn it into a 4500 flange? I actually have two, the one I used on the dyno and an untouched one still in the box.
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TF 440 int_1.jpg

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Part of why I'm asking is because none of the dedicated 4500-type RB (440 block) standard-port (not Max Wedge) intakes that have been available over the last decade are that great as cast (e.g., runner size and/or port alignment) and the TF 4150 could be a better starting point w/ the appropriate carb flange.
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TF 440 int_2.jpg

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Also, any ballpark $ (USA) for what that sort of work would cost? Trying to get a sense for cost of the mod vs a dedicated -- even if flawed -- 4500 intake.

Thanks - Brad

[mt-engines]

How about you explain in detail the build, the application, rpm looking for etc.

Yeah i have a big block chevy. Dont know if i should get an air gap or sv632.

[BradH]

NP...

BB Mopar 452 ci w/ 11.25 CR
E Victor standard-port heads
266/266 at .050" x .650" on 108 sold roller (COMP RX lobes)
TF intake shown tested w/ a few different 4150 carbs, but none of them were "nuts on" w/ the tune on the dyno

Made about 680 HP at 6800 and 600+ torque at 5100, which is 60+ HP more than the previous combination that ran in the mid-10s at 125-126 MPH at 3750+ #s w/ driver. It's a street/strip car that runs on pump 93 E10 w/ a bit o' race fuel to keep the top end happy: 4.10s, 275/60R15 DOT drag radials, 4500-flash converter...

Always been a 4150 guy, but wondering what something like a 1050 Dominator on a decent intake might do for it. Some people seem to get significant gains from this type of change, but certainly not everyone from what I've seen.

FWIW, dyno results show the 610+ HP head/intake/cam combination that ran 10.5s vs the new one (yes, same dyno).
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10.2017 BSH RB452 dyno.jpg

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Thanks - Brad

[MadBill]

...Always been a 4150 guy, but wondering what something like a 1050 Dominator on a decent intake might do for it.... - Brad

A 1,000 + CFM 4150 would be a bolt on for your and many other manifolds; just saying...

[GARY C]

I don't know about your combo but I know several in the stroked SBC world that found a 4150 intake with a dominator adapter to provide a better power curve than the 4500 intake. The good part is you get the bigger plenum for the CI with the smaller runner without sacrificing the intake plus you can compare how it works to a big cfm 4150 with an equal 2" spacer.

[BradH]

...Always been a 4150 guy, but wondering what something like a 1050 Dominator on a decent intake might do for it.... - Brad

A 1,000 + CFM 4150 would be a bolt on for your and many other manifolds; just saying...

My biggest 4150 is a 1.58" v annular that wet-flowed about 950 CFM at AED. It may be all I need, but I was looking into options for Plan B.

EDIT: One of the reasons I don't want to rely on tall spacers or adapters is limited hood clearance, even with a scoop.

[BradH]

FWIW, I found a couple of different suppliers for .5" adapters that attach to a dual-pattern (4150 & spread-bore) intakes using the spread-bore holes. They still require the plenum to be opened up to match a 4500 base, but can make the project more DIY oriented.

I think it's Hardin Marine who sells one with the square 4500 opening, and T/A Performance has one with a cloverleaf opening.

[BradH]

Picked up a square-style adapter to see how it mocked up on my spare Trick Flow intake. That's a LOT of Makita time for someone who doesn't have access to a vertical mill.

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[BradH]

Views into the plenum with the adapter in place for context...

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[PRH]

It’s just time.
Pick away at it 1/2hr at a time...... it’ll get done before you know it.

[Powertrip]

Is there enough material on the outside of that plenum for that to work? It looks like you would break through if you were to mill it out to the adaptor.

[BradH]

Is there enough material on the outside of that plenum for that to work? It looks like you would break through if you were to mill it out to the adaptor.

I don't know, but was wondering the same thing.

One of the pics was intended to show how much of the original walls on the left and right side would remain if taken out to the width of the adapter. And if you look at the intake as shown without the adapter, you can see how far straight down the original casting is from the carb pad.

I rebagged the parts and stored them after taking the pics, but will have to take 'em back out to see what I can measure with that concern in mind.