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  1. #31
    Not the Kingswood! hq308's Avatar
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    Quote Originally Posted by devil View Post
    looking at that pic it looks more like a single plane than a traditional dual the Holden 955 for example has runners that T piece effectively bouncing off a wall which could cause fuel to "fall out" of atomization HDT even cut these in half to add a separator this was the "Bathurst" intake lol

    the above pic seems to have designed most of that out
    Itís a nicer dual plane than a factory one but I stand by my comment that TBI works fine with a dual plane, even a 955. If the fuel from a TBI will ďfall outĒ of suspension as you put it, it will do the same thing with a carb. A TBI is nothing more than an electronic carb and for the most part intake manifold selection is similar to what youíd pick for the same engine with a carb.

  2. #32
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    Awesome thank you all for your input, pretty well the same chain of thought in choice but I thought I would get more experienced opinions.

    The issues I had with the TBI were:

    hot start issues, flat spot just off idle (couldn't adjust it out with any suggested setting by Fitech themselves), when I want to just idle along in 1st (carparks etc) with no throttle it would idle up to 1200 and go faster, delayed drop in revs when taking foot off throttle.

    The good from TBI:
    a lot more power through rev range
    better economy when I wasn't using the extra power.

    I am currently using a Blue Motor quaddy with pollution canister and PCV hooked up... good, bad or neither?
    Also using the 4 hole plastic type 1/2 inch spacer trying to get more torque and economy, good or bad? What I have noticed with this, is that it mostly just helps keeping the carb cool for easier hot starts.

  3. #33
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    EH179,

    Your memory is failing as well.....
    You started the name calling, post #13. I just responded.

    To the OP & others.

    There is an excellent book on QJs by Cliff Ruggles. S-A books #113. I believe it is still available. Colour photos, discusses the different models & how to tune the QJ. There are some 'recipes' where cam duration is increased, with the required carb mods. One of the recipes is very close to the OPs, the generic 204/214 cam. This book will show you how to tune/dial in the QJ, no special knowledge reqd.

  4. #34
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    This is an excellent site for those of us who have limited knowledge when it comes to modifications. This is not the first thread that the keyboard warriors are having a go at each other.
    On any other forum it would not be allowed, they would be warned and repeat offenders kicked out. I ask of the moderator(s) to put an end to it

  5. #35
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by GtoGeoff View Post
    ................
    To the OP & others.

    There is an excellent book on QJs by Cliff Ruggles. S-A books #113. I believe it is still available. Colour photos, discusses the different models & how to tune the QJ. There are some 'recipes' where cam duration is increased, with the required carb mods. One of the recipes is very close to the OPs, the generic 204/214 cam. This book will show you how to tune/dial in the QJ, no special knowledge reqd.
    yawn, this is getting boring......

    mine


    Cliff is ok, I buy bits from him and also ring/email him for info
    also try out Lars' Grimsrud Quadrajet tuning guide
    and HOTRODS Quadrajet guide... https://www.hotrod.com/articles/ctrp...rburetor-tips/

    plus about 100 more including... jet and metering rod guides, accel pump mods and changes
    suggest YOU do some reading
    Last edited by Smitty2; 07-01-2019 at 06:44 PM.
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  6. #36
    Senior Member TonnerGuy's Avatar
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    Quote Originally Posted by snowman233 View Post
    Awesome thank you all for your input, pretty well the same chain of thought in choice but I thought I would get more experienced opinions.

    The issues I had with the TBI were:

    hot start issues, flat spot just off idle (couldn't adjust it out with any suggested setting by Fitech themselves), when I want to just idle along in 1st (carparks etc) with no throttle it would idle up to 1200 and go faster, delayed drop in revs when taking foot off throttle.

    The good from TBI:
    a lot more power through rev range
    better economy when I wasn't using the extra power.

    I am currently using a Blue Motor quaddy with pollution canister and PCV hooked up... good, bad or neither?
    Also using the 4 hole plastic type 1/2 inch spacer trying to get more torque and economy, good or bad? What I have noticed with this, is that it mostly just helps keeping the carb cool for easier hot starts.
    Interesting so the TBI gave you more power and economy, but issues with hot starts, believe that happens with the command center, as is to close to engine and exhaust, apparently better off with a in tank or inline fuel pump, creeping idle would be a problem but, i run a blue 308 and a quaddy on a daily basis, pretty happy with it, except a little difficult to start on a cold morning (no choke) but you get used to that, would not mind some better economy, but then again the tonner is loaded with crap everyday in start stop traffic so can not expect to much from it, but when i boot it still goes well for a old girl.

  7. #37
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by keith reed View Post
    This is an excellent site for those of us who have limited knowledge when it comes to modifications. This is not the first thread that the keyboard warriors are having a go at each other.
    On any other forum it would not be allowed, they would be warned and repeat offenders kicked out. I ask of the moderator(s) to put an end to it

    I am letting it go ... for the moment (but I will only take shit for so long)
    partially as I am trying to correct a fair bit of misinformation here

    I am trying to see that people/members learn stuff here ...
    and there is some good info posted on this thread

    I have been playing with Quaddies since the mid 70s (yeah, makes me old)
    (trying to make a Holden HT GTS 350 Bathurst version go faster)
    but there are things about these that fit my mantra.. learn something new each day


    Myself and the other mods will keep watch
    Last edited by Smitty2; 07-01-2019 at 06:53 PM.
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  8. #38
    casual poster JaseQ314's Avatar
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    Quote Originally Posted by keith reed View Post
    This is an excellent site for those of us who have limited knowledge when it comes to modifications. This is not the first thread that the keyboard warriors are having a go at each other.
    On any other forum it would not be allowed, they would be warned and repeat offenders kicked out. I ask of the moderator(s) to put an end to it

    Relax Keith, it's only the internet and life's way too short.

    You can still learn something, a bit of billy-goating between passionate posters isn't going to stop that but it adds to the entertainment for us morons with nothing else in our lives .

  9. #39
    Do you ever leave? immortality's Avatar
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    Quote Originally Posted by Daymoe View Post
    With the FiTech EFI issues - you will have fuel distribution issues with a dual plane manifold and most throttle body injection style systems - they should be used with single plane manifolds and I remember seeing on their website a while ago that the FiTech system specifically mentions it shouldn't be used with a dual plane manifold, but I can't find the link at the moment, did it have starting issues?

    Engine masters had the same issue with another TBI EFI kit with a dual plane manifold.
    Engine Masters definitely had issues with the dual plane but I don't think it was limited to Fitech. Their solution when ever they use the Dual Plane Air Gap manifold was to use an open spacer to solve the distribution issue with said manifold...

    Interestingly, the 304/355 Edelbrock Air Gap manifold has similar distribution issues but the TP High Rise dual does not and probably why the Fitech is happy on that engine.

  10. #40
    Do you ever leave? paulzig's Avatar
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    Quote Originally Posted by immortality View Post
    Engine Masters definitely had issues with the dual plane but I don't think it was limited to Fitech. Their solution when ever they use the Dual Plane Air Gap manifold was to use an open spacer to solve the distribution issue with said manifold...

    Interestingly, the 304/355 Edelbrock Air Gap manifold has similar distribution issues but the TP High Rise dual does not and probably why the Fitech is happy on that engine.
    Dont know if anything or anyone is truly happy with a dual plane... If you go to the trouble of EFI why not go to a multiport system, and if you are having distribution issues go to a sequential system with cylinder correction.. All these things like Fitechs et al are just electronic carbs..

  11. #41
    Not the Kingswood! hq308's Avatar
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    Quote Originally Posted by immortality View Post
    Engine Masters definitely had issues with the dual plane but I don't think it was limited to Fitech. Their solution when ever they use the Dual Plane Air Gap manifold was to use an open spacer to solve the distribution issue with said manifold...

    Interestingly, the 304/355 Edelbrock Air Gap manifold has similar distribution issues but the TP High Rise dual does not and probably why the Fitech is happy on that engine.
    Iím not sure if this last comment is referring to my engine but it has a Fitech and an Edelbrock Air Gap and it works great.

  12. #42
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    Quote Originally Posted by hq308 View Post
    Iím not sure if this last comment is referring to my engine but it has a Fitech and an Edelbrock Air Gap and it works great.
    Does your Edelbrock Air Gap have the plenum divider milled out or do you run an open spacer with your Fitech?

  13. #43
    Do you ever leave? immortality's Avatar
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    Quote Originally Posted by paulzig View Post
    Dont know if anything or anyone is truly happy with a dual plane... If you go to the trouble of EFI why not go to a multiport system, and if you are having distribution issues go to a sequential system with cylinder correction.. All these things like Fitechs et al are just electronic carbs..
    Some people love em, some hate em.....

    I've not ever been able to do back to back comparisons so can't say although hopefully that will change one day soon.


    Quote Originally Posted by hq308 View Post
    I’m not sure if this last comment is referring to my engine but it has a Fitech and an Edelbrock Air Gap and it works great.
    My bad, thought it was a TP high rise.

  14. #44
    Not the Kingswood! hq308's Avatar
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    Quote Originally Posted by 46Crab View Post
    Does your Edelbrock Air Gap have the plenum divider milled out or do you run an open spacer with your Fitech?
    The divider hasnít been milled and I donít run a spacer. I did try a 1Ē tapered spacer that I have but it didnít make any noticeable difference.

  15. #45
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    "QJ carburetors have mechanical secondary throttle plates operated by a progressive linkage; the primaries open before the secondaries, and use on-demand air valve plates above the secondary throttle plates. The air valves are connected by a cam and linkage to the secondary fuel metering rods. As the airflow increases through the secondary bores, the air valves are pushed down, rotating a cam that lifts the secondary metering rods. The secondary rods are tapered in a similar fashion to the primary metering rods, effectively increasing the size of the fuel metering holes as the rods are lifted and delivering more fuel. Therefore, the position of the air valve will control both fuel and air flow through the secondary venturis, even if the secondary throttle plates are fully opened. Thus the Quadrajet acts like a vacuum-secondary carburetor and only delivers more fuel as it is needed."
    If my old hdt qj was e85 compatible I would have kept it.

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