freaky57fast

Was going to switch my intakes this winter and was wondering if anyone had information on either of these intakes on a 440ci engine or at least a 427 or something comparable. my set up this year will be a 440ci 13 or 12.5 to 1 compression ls9 headed ls1 block. I'm looking for power up to 7500-8000 rpms since i have a standard glide with a 4.11 gear 28" tires. last year shifting at 7500 had me around 7 at the traps, car was way down in power though i recycled my old cam from the 370 so this yeah I'm hoping to trap 150mph or more. Even if anyone has a few comparisons I could look at I would appreciate it, any slips or dyno numbers thank you

KCS

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spanks13

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CID intake is probably the best option

Che70velle

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carbuff

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I don't know that my combination is very applicable to you, but here is my thread about my engine dyno results of a 434 with LS7 heads and an Edelbrock Super Victor as well as the MAST single plane intake.

https://ls1tech.com/forums/dynamomet...o-results.html

freaky57fast

That seems to have the information i was looking to see. up top the vic falters but the mast stays flat. i might run out to 8400 if it keeps making power
I would guess the cid would be comparable to the mast, they look to be similar, may look up some results on those..

carbuff

iTrader: (8)

One thing to be certain to note is that the MAST is a 4500 TB while the Super Vic is a 4150 TB. The 4150 plenum is a lot smaller which is what I believe causes the dropoff up top. I was actually pretty impressed that the Super Vic kept up with the bigger MAST as well as it did.

Also note that the Super Vic had been ported while the MAST was as delivered.

If I could fit a 4500 TB then I would definitely go that route. So if you have the option, I recommend doing so whichever intake you choose. Especially if you plan to spin that level of RPM.

Best of luck!

freaky57fast

I should have said I plan on using the 4500 super victor in the op. am now considering the cid 4.5 now i had no idea they were as cheap as they are. I'm still waiting to see if anyone had a good back to back with the hi ram vs a single plane, its winter so i have about 4 months to decide the top of this engine.

bigsapper

You can get an LS1 block to 440ci? Please show me the way.

KCS

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pantera_efi

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HI ALL, I manufacture a 1200+ CFM air door that has the 4150 "foot print" with TWO 2.5" butterflies.

Lance

carbuff

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Lance,

Do you have any dyno or other data to show how that compares to a traditional 4150 4-blade throttle body? That's an interesting design idea...

I actually run one that is no longer made which was rated at 1550 CFM from Accel. I have no way to verify that flow rate of course, but it feeds my engine pretty well. I do get a bit of vacuum at the top of dyno pulls, but I expect that is as much plenum volume as it is throttle body flow capability.

freaky57fast

freaky57fast

JoeNova

Lance, I like that throttle body design quite a bit. A pair of 2.5" blades should outflow your typical 4150 throttle body with 4 1.75" blades, especially with that inlet shape.
Any plans on offering with larger 2.75" blades?

pantera_efi

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Hi Joe, thanks for the kind words.

I use the SAME butterflies in my "Eight Stack" LS ITB Intake.

The casting is too thin in the bore area for a size increase.

Lance

cdubbzz

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CID all the way. My N/A pump gas 434 made great power to 7500 and will rev easily to 8k with no loss in power

Their FB page has multiple posts showing power gains over much of the competition

Che70velle

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freaky57fast

I think the CID is the way i will go. Looking around people are saying the same thing, I never considered them since I figured they would be mast expensive.

Double06

You may want to look at a TSP sleeved LS3 block if you are going to do all this. The LS3 is a better block and it has the bay-to-bay breathing windows that the NA motors like. Not so much for forced induction. I think they did some other block improvements as compared to the LS1. Most of the cost is getting the block ready and sleeving it that is why I suggest it. The LS9 takes 12 mm head bolts too. They can add that as an option also.