Hello all! I'm building a 455 bored .030 over. I'm using an eagle rotating assembly with stock stroke. h beam forged rods and SRP pistons 5cc relief. I'm running hydraulic roller lifters with a custom grind roller cam. main restrictors and resticted push rods. I'll be using edelbrock performer rpm heads form OPP with a port and valve job done on them. DOES ANYONE HAVE ANY IDEA WHICH INTAKE WOULD BE BEST FOR MY APPLICATION. SINGLE OR DUAL PLANE? IM NOT LOOKING TO RUN ABOVE 5500 RPM. Any help would be appreciated. This is going to be a high performance street car. its going in a 70' cutlass with OAI hood.

 

What are your cam specs? That would be the major determining factor in which intake to use.

In any case, with the amount of low end torque these engines make the single plane intakes don't hurt the bottom end and can help the higher RPM (5000+) range. I know you say you aren't going above 5500, but that is where I made peak power with a Torker.

I vote for a Torker

 

X2 on needing full cam specs.

Converter, trans, and gear specs would also help. Is it a street only car or do you want to run it on the drag strip as well?

Do you plan on using the factory OAI air cleaner too or just the hood?

It sounds like a very healthy build. Is OPP also grinding your cam? I would ask the builder/designer for their recommendation as well.

 

I don't know the exact cam specs but will get them as soon as possible. It's ground to allow me plenty of vaccum to run my brakes and assesories. Yes OPP did do the grind on my CAM and as well is supplying my heads. Mr Miller said the Holley dominator single plane might be worth taking a look at though its discontinued. What do you all think. I saw a post on youtube athat did a comparison between single, dual and air gap intakes. it had the dual planes making more power below 5500 RPM. What do you think?

 

Yes I hope to take it to a drag strip from time to time just to see what she can do. The rotating assembly is currently being balanced internally and I'll be running a th400 trans. not sure on rear end gearing yet as im not even done with engine.

 

X3 on the cam specs.

Your build doesn't really make sense. Here's why;

You say 5500 will be the rpm limit right, yet you're spending the money to have it internally balanced, heads ported, it'll have the better part of 11.0:1 with that head and piston combo, and you also need to fit it under an OAI hood, correct? What is your hp/tq goal?

Then just put a Performer on it and be done with, and even with that hood clearence will need to be tweaked. The Holley SD may be about the same height but either way you'll need to make some mods if I'm not mistaken. So your choices are somewhat limited anyway.
FYI, I have a Holley SD available that's in excellent shape.

Best of luck in your build.

 

Thanks cutlassefi. Please tell me more about the Holley. My 5500 RPM goal is where the engine will live the most of its life. i don't plan to run it at high RPM all the time. Yes your right. Im building it to be able to spin faster and be more relaible when it does but I'm looking for an intake that will give it the power in the power band I figured I'd be in most often. I'm using a thicker head gasket .060 (cometic) to bring the compression down. The internal balance job only cost me a $175 difference for the mallory so I went with it. I blew my last motor rving to high as a "younger slightly less imature man". I want this next one to be able to handle the higher RPMs though it wont live a life there.

 

Been using desk top dyno (not sure if its legit) My goal is 515HP 600TQ . I'm unable to get to my shop as Im military and deployed but will call to get the CAM specs and post to shine a little more light on this project. I installed the restictors so I can go high RPM without oil issues (what killed my last motor), as well as main caps. Depending on the intake Im gonna get with my co workers in fab and have them make me up a drop aircleaner base so that I can keep my OAI aircleaner set up. Havent looked into it at all as I dont even know hte best intake for my application.

 

Honestly with the money Im putting into the motor I want some play room. To be able to go ***** to the wall without blowing my motor or causing long term damage.

 

Hey cutlassefi, much for your Holley? And is it better than the torker? I'v never heard of it till OPP told me about it.

 

I run the Torker on my engine and believe me, there is no lack of bottom end torque. I only shift at 5200 and go through the traps at 5500.

 

If that's your goal then I'd do a Torker or Holley with an 850, minimum. You'll need a cam with mid to upper .500's lift and and mid to upper 230's on the intake duration.
As a point of reference, BTR made 540/625 if I remember right with out of the box Edelbrocks, a 238@.050 hyd roller, an RPM air gap, and 496 cubic inches. And that's running at only 125 degrees water temp, Take 20 or so hp/tq off of that at true operating temps. You'll need the right setup to hit your goals.

Intake is $175.00 plus shipping.

 

I would use a dual plane, I would work the heads some, combined with a hyd roller 515 should be no problem, getting the low lift flow up on those heads up with a good 270 @ .500 lift would easily meet your goals.

 

Sounds like my current 455 engine build isn't to far from yours, and am running an Edelbrock Performer dual plane. This decision came from running a Holley Street Dominator single plane on my 403. Low end torque wasn't so great, but sure woke up, when swapping to a Performer.

 

If it's going to be used mainly on the street, you would be happier with a dual plane such as the Edelbrock Performer RPM Air Gap



http://www.edelbrock.com/automotive_...r_gap-bb.shtml

 

Low end torque would be night and day different between a 403 and a 455 regardless of which intake you used.

 

Thanks for everyones input. I'm leanng toward the Edelbrock air gap, but would be interested in seeing a real life dyno comparrison between the different intakes. I saw it done on youtube using a chevy. I already have a Torker intake and will soon order the Air Gap from Summit. Once my engines ready to run we'll dyno it with both intakes to see which is best (for my application). I'm still waiting on the info concerning my cam specs. but will get them ASAP. "Cutlassefi", from your time using the Holley SD is it better than the Torker?

 

Many of you recommended the single planes. I've always thought sinlge planes were more for higher RPM usage and dual planes were for lower RPM power production. My bottom end is being built to handle higher RPM but it won't be living its life there. It won't see alot of track days. though I want to be able to hold my own next to most newer vehicles. (won't be hard it is an Olds big block right lol). So... what is the difference between these intakes when it comes to OBB's

 

GAoldsman, I'm leaning toward the Air Gap. I've seen the center divider on these intakes milled down some. Why is this? If I get the Air Gap i want it to perform as best it can though I wouldnt want to buy a brand new intake and ruin it. Do you (or anyone else) know anything about this intake and proceedure

 

That air gap sure looks good to me, I can tell you on a big block chevy, going to a single plane over a dual plane on a 500 HP engine is a sure way to throw away 40 pounds of TQ, personally I would'nt even try the single plane on an Olds. On that air gap, a 1 inch open spacer might work well, if you can fit it.

 

My recommendation is to run this intake with a 770 Holley http://www.holley.com/0-81770



Just right for what you are looking for and plenty of low end umph as well as a darn good powerband throughout the entire range. I would suggest on the dyno to add a spacer on one run and one run without. Way easier than swapping out intakes. You will not be disappointed. My air gap has both bolt patterns for square bore and spread bore so you will not need an adapter to use the Holley.

 

You mill the center divider down so it opens up the intake to "see" all 4 barrels of the carb.

If you read my notes on the dyno session I did, the air-gap will need a spacer and/or a larger carb because of it's smaller plenum.
If you haven't finalized your cam grind yet then I wouldn't buy anything until you do. That will have an impact on the intake as well.

 

X2 on everything Cutlassefi said.

Don’t order an intake until you have your cam specs finalized with Andy.

Based on your goals and being mostly a street car, chances are the Edelbrock air gap would be a great choice. I’m not sure if it’s going to be possible to use the OAI air cleaner even if you modified it, you would have to use the published measurements do a mock up on it.

I would suggest if you run the air gap to use a good spacer and at least an 830cfm carb, even with the spacer. For your goals, engine build and application, and assuming you’re going to run the appropriate gears and converter, I would be looking at this carb from Quick Fuel. It has a lot more potential for fine tuning on the dyno and in the car with a wideband, since all the air bleeds being screw-in, even the IFRs and PCVRs are tune-able.

http://www.quickfueltechnology.com/c...30-cfm-ms.html

 

X2 on the Quickfuel products . We used them one year for our EMC challenge and found them to have a great product line .

 

here is my 2 cents nowadays with extensive testing they are saying to use the torker on big block olds dick miller mondello etc.

 

I have to ask, really, what has any Mondello ever done in racing?