Help Needed: 340 Cam, Heads & Intake

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    Author Topic: Help Needed: 340 Cam, Heads & Intake  (Read 4939 times)

    Offline Jacksboys

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #15 on: March 29, 2007 - 10:27:33 PM »
    Quote from: NZ440R/T on March 29, 2007 - 09:42:38 PM

    Thanks Evil. :2thumbs: What about the M1 dual planes from Mopar? Are they a good flowing intake? Height?
    I really, really, want to use my 6bbl/4bbl sixpak air cleaner set up. :walkaway:

    With my 308 heads (2.02") what can I fit. Because they're a Mopar part can I basically run anything intake and header wise that a stock 340 or 360 can fitment wise?

    I have never delt with the M1 intake but it should be okay.  I would still make sure the port line-up good.

    As far as I know, there should not be any problems with the intake or headers with the 308 heads, as long as they have not been machined a bunch.
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    Offline moper

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #16 on: March 30, 2007 - 07:27:31 AM »
    Well, I'm not sure what you are doing to the 308s. 400hp isnt hard to get from iron castings. But the edelbrocks flat out are a better head. (sorry CP :wave:) But, seeing as you have them... You have them with 1.88 intake valves. I would stick in 2.02s. The exh port is much better than most J style heads, and a 1.6 or 1.625 will be fine. You will need the spring seats cut flat, and the guides trimmed down to run a decent cam. In keeping with the Engle line of thinking. I would spec a cam like this: Intake lobe use EP-49HYD (.509 lift, 238°@.050 lobe advanced 2°), exh K60HYD (.534 lift, 238°@.050), on a 110 lobe center. You will want a little more on the exh side, and the intake closing earlier will help the idle quality and mid range. With a solid performance valve job, basic bowl cleanup, and aiming for a a static ratio of 10.3:1 with flat tops and no quench, you'll get past 400 hp easy. Engle is a great deal too. You can order a full custom grind, with lifters, for $282.

    edit: On the intake, the std dual plane M1 is a stock one from aluminum. Wasted money IMO. Use the std Performer, or modify the base plate to fit the RPM. It's not hard at all.
    « Last Edit: March 30, 2007 - 07:56:26 AM by moper »
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    Offline Carlwalski

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #17 on: March 30, 2007 - 06:09:02 PM »


    Thanks Moper & Jacksboys.


    Moper - I will definitely go for a Engel. I'll talk to the engine builder and see what we should do to get the results I want. I will definitely but porting the heads to 2.02" but I'm not sure what would be the best route to take with the exhaust port. I'll do a little research, make some calls and find out.


     :cheers:
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    Offline Carlwalski

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #18 on: March 30, 2007 - 06:46:03 PM »
    Quote from: moper on March 30, 2007 - 07:27:31 AM

    edit: On the intake, the std dual plane M1 is a stock one from aluminum. Wasted money IMO. Use the std Performer, or modify the base plate to fit the RPM. It's not hard at all.

    So far the Eddies have been recommend to me the most. Even Chryco said an Eddy would work just as well as anything else out there so that sounds good enough reason to me.

    Performer 318/360 dual-plane aluminum intake manifold.
    Has an rpm range from idle to 5500. Accepts squarebore or spreadbore carburetors. 

    Performer RPM 340/360 aluminum intake manifold.      
    Has an rpm range from 1500 to 6500. Accepts early-style water neck only.  (I'm not sure what style my Demon is?).


    Which do you guys think would work better? I'm wanting more low down response as I really can't see me doing 7K on the streets. I'd rather have that low response for better launches and what-not. What are the pros and cons of a intake set up for idle and one set up for 1,500rpm?



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    Offline 1BADFISH™

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #19 on: March 30, 2007 - 07:08:37 PM »
    Quote from: NZ440R/T on March 29, 2007 - 09:56:43 AM
    Thanks Jacksboys, that is what I am wanting most, to have lower rpm/torque rather than high (7K+) rpms.
    I would like the lowest best performer intake I can get as I heard the lower the height the lower the max rpm better low end? As a rule of thumb? Not sure if that's true....... :dunno: But also I have a 6bbl air cleaner set up custom made to fit a 4bbl and I need the clearance as it not only looks cool but does help air flow.

     :cheers:

    I bought one of them for my old car but never used it...sold it on ebay and someone bought it for $99....messed up putting in my reserve and never even checked the auction till after it ended.   :walkaway:   :puke:
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    Dave
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    Offline Carlwalski

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #20 on: March 30, 2007 - 07:19:02 PM »


    :smilielol: BUGGER!!  :banghead:


    What about a 6bbl set up for my 308 heads? :dunno: Stock 3 x 2bbl Holleys? I heard they can be hard to tune, if so, what are they like once tuned? Will they de-tune themselves or once they're set they're pretty much "done".  Which do you think will have the better performance? A Demon 650cfm 4bbl or a stock 6bbl setup from intake to carb.
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    Offline Jacksboys

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #21 on: March 30, 2007 - 10:46:24 PM »
    Quote from: NZ440R/T on March 30, 2007 - 06:46:03 PM
    So far the Eddies have been recommend to me the most. Even Chryco said an Eddy would work just as well as anything else out there so that sounds good enough reason to me.

    Performer 318/360 dual-plane aluminum intake manifold.
    Has an rpm range from idle to 5500. Accepts squarebore or spreadbore carburetors. 

    Performer RPM 340/360 aluminum intake manifold.      
    Has an rpm range from 1500 to 6500. Accepts early-style water neck only.  (I'm not sure what style my Demon is?).


    Which do you guys think would work better? I'm wanting more low down response as I really can't see me doing 7K on the streets. I'd rather have that low response for better launches and what-not. What are the pros and cons of a intake set up for idle and one set up for 1,500rpm?

    Go with the RPM.  The non-RPM with run out of power at about 5000rpm, and your cam will want to pull to about 6000rpm, so go with the RPM.

    I am running it with a stock torque converter, and it has plenty of low end torque.

    From what I have heard, a well tuned 4bbl can do better than a 6bbl setup.
    « Last Edit: March 30, 2007 - 10:48:02 PM by jacksboys »
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    Offline Carlwalski

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #22 on: March 30, 2007 - 11:13:17 PM »


    Thanks mate, I will run the RPM. I have also heard that a well tuned 4bbl set up is equal to and usually better than a 6bbl. In stock form, different story. I think I Will stick with my Demon. It's grunty and easy maintenance.

    So, my set up is coming along nicely.

    Heads: 308 swirl castings with 2.02" intake.
    Intake: Edelbrock Performer Airgap RPM
    Carb: 650cfm Mighty Demon (Mechanical secondaries)
    Headers: tti 4-into-1 Step headers: 1-5/8” OD primary tubes, 1-3/4” OD secondary tubes with 3” collectors.
    Exhaust: Forza Flow 2-1/2” race system with X-Pipe. Custom additional mufflers & exhaust cutouts.

    All I need now is a good camshaft and I'm basically set. The bottom end is stock, not sure if I should bore it .30" yet or not. It will get new rings and a thorough checkup. What kind of horsepower gain would I see with .30" and some good pistons over my set up with stock pistons? 20-30hp?


    Thanks,
    NZ
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    Offline Jacksboys

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #23 on: March 30, 2007 - 11:33:10 PM »
    Just a thought for you on the intake, you could get the non-Air Gap RPM intake.  They have the heat crossover which might help on cold days.  You may want to get other opinions on this, but it is a thought.

    The piston setup really depends on the compression you plan on having, have you decided yet?  The higher the compression you can run without problems, the better the low rpm torque.
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    Offline Carlwalski

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #24 on: March 30, 2007 - 11:51:40 PM »


    I have no idea about compression, not even sure how it all works but I have a rough idea. What do you suggest? Around the high 9's you think? 10.1 or something? lol I have no idea what I'm talking about......

    How high is you rpm air gap? I'm wondering if it will leave room for my 6bbl air cleaner set up. I would not put my 6bbl if it meant losing performance by using a lower or insufficient intake but I sure as hell wouldn't mind having it on and will try to get a perfect set up where I get the ideal intake and still leave room for my air cleaner.

    I know it's hard to gauge but the intake on there now left no room for the 6bbl set up at all and I the Mopar air cleaner which has the same design as the head covers didn't fit either. Acutally, can you tell what intake that is? It's Mopar, maybe I already have the M1 on my old set up?


    :swaying:
    « Last Edit: March 30, 2007 - 11:56:05 PM by NZ440R/T »
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    Offline Jacksboys

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #25 on: March 31, 2007 - 12:07:28 AM »
    From what I have read and heard from others, since you are running iron heads and a mild cam, you should be able to run around 9.5:1 if your head choice does not have a quench, with 93+ octane fuel.  I think the 308s have an open chamber.  If you had some iron heads with a quench (closed chamber) you should be able to run 10:1 on 93+ octane.   

    I have about 10:1 comp with my quench heads but they are aluminum which helps even more.

    I am running the regular RPM version, not the AirGap RPM version; but looking on Edelbrocks website, they look like the same height. 

    Not sure if you air cleaner will work or not, you will just have to try it after the engine is installed.
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    Offline EVIL72

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #26 on: March 31, 2007 - 12:19:31 AM »
    Quote from: NZ440R/T on March 30, 2007 - 06:46:03 PM
     

    Performer RPM 340/360 aluminum intake manifold.      
    Has an rpm range from 1500 to 6500. Accepts early-style water neck only.  (I'm not sure what style my Demon is?).


    Which do you guys think would work better? I'm wanting more low down response as I really can't see me doing 7K on the streets. I'd rather have that low response for better launches and what-not. What are the pros and cons of a intake set up for idle and one set up for 1,500rpm?

    Any regular straight up small or big block mopar, water neck will work.
     
     As for intakes I haven't heard much about the M1 dual plane.
     I'd still go with an Edelbrock RPM, or RPM Air-Gap, it's a 340.

    Quote from: NZ440R/T on March 29, 2007 - 09:42:38 PM
    With my 308 heads (2.02") what can I fit. Because they're a Mopar part can I basically run anything intake and header wise that a stock 340 or 360 can fitment wise?
    Yep.
     Sounds like it's going to be a nice setup.
     
     
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    Offline Jacksboys

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #27 on: March 31, 2007 - 12:28:00 AM »
    Quote from: NZ440R/T on March 30, 2007 - 11:51:40 PM
    Acutally, can you tell what intake that is? It's Mopar, maybe I already have the M1 on my old set up?


    Hard to tell which that is.  Just take your carb off and see if it is a single or dual plane intake.  If it is a dual plane, then it might work for you.
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    Offline Carlwalski

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #28 on: March 31, 2007 - 12:52:20 AM »
    Thanks guys, sounding good for the Edelbrock rpm airgap. :cheers:

    What cam do you think would work and what is the difference in hydraulic and solid? Which would be more suited for my combo? The Engle K56 or K58 sound like my top two picks. I've also heard a lot of good reports and posts on the Racer brown stuff. I think the K56 is the one for me, it has better low down response. Although, it's "only" 200rpm difference so perhaps the K58? The K58's lift is bigger and so is the dur@.50, not sure if they means much but when I've been looking the bigger those numbers usually means the better?

    The specs for the camshafts are below, check the photo name for the spec.
    K56 first and K58 last.

    Opinions?  :dunno:

    « Last Edit: March 31, 2007 - 01:00:22 AM by NZ440R/T »
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    Offline Carlwalski

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    Re: Help Needed: 340 Cam, Heads & Intake
    « Reply #29 on: March 31, 2007 - 05:02:38 AM »

    How about this set up? :naughty:

    http://www.sixpackperformance.net/SixPackParts.htm 340 Six Pack set up includes Air Cleaner! Pricey but I can sell my Demon, intake and custom 4bbl/6bbl set up to help pay for most of it. It doesn't come with solenoids (not that I know what they are). How many solenoids does it need? With that kit I get the coolness of a 6bbl set up, hood clearance and carb/intake matter solved in one hit. Will this kit bolt on to my 308 heads 2.02" intakes without any mods?


    Opinions?
    « Last Edit: March 31, 2007 - 05:04:41 AM by NZ440R/T »
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