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  1. #1
    Part of the furniture ajvx01's Avatar
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    Default 304 basic advise

    Hi guys,
    I've got an efi 304 I'm about to put into the vc and I'm after some do's and do not's please!

    The motor will have a little side mount blower attached and the plan is for around 8psi.
    I plan on:
    - changing the head gasket and studs
    - putting in a real basic set of roller rockers
    - put on a hi energy sump I have lying around
    - put on a modified banana manifold with forward facing ls1 throttle body (this is for pipework ease)
    -and that's about it for now.

    My questions are:
    - what roller rockers are recommended?
    - being that the motor will be boosted I plan on running an external oil drain back from the rocker covers to the sump, but what should I do for a rocker cover breather?
    - What head gaskets and studs etc? I've been told to go standard and fresh so if anything let's go it will be that and not the motor?
    - should I be upgrading the oil pump?
    - Is there anything else basic/cost effective I should be doing?

    Motor will be mated to a t700 with 2500rpm stall converter and the car will just be a cruiser FYI..

    Thanks in advance!


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  2. #2
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    Are u changing the cam? What fuel and will you be using an intercooler?

  3. #3
    Part of the furniture ajvx01's Avatar
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    Quote Originally Posted by tokes_Vhdrift View Post
    Are u changing the cam? What fuel and will you be using an intercooler?
    For now the plan isn't to change the cam, fuel will be 98.. Intercooler is undecided, open to advice!

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  4. #4
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    Quote Originally Posted by ajvx01 View Post
    For now the plan isn't to change the cam, fuel will be 98.. Intercooler is undecided, open to advice!

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    I wouldn’t bother changing rockers then. I would go an intercooler tho otherwise it’ll be very timing limited with the standard donk.
    Run your lines off each rocker cover into a catch can with filter on top, then a drain line off bottom of cans into your sump.
    May as well just run a felpro head gasket or the likes.
    This blower has engine oil lines not it’s own gearbox? If so tie the blower oil return into one of your catch can returns to sump.

  5. #5
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    Banana's manifold = intake air oven!

    Water/Meth works well enough and a much cleaner install than a front mount.

  6. #6
    Part of the furniture ajvx01's Avatar
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    Quote Originally Posted by tokes_Vhdrift View Post
    I wouldnít bother changing rockers then. I would go an intercooler tho otherwise itíll be very timing limited with the standard donk.
    Run your lines off each rocker cover into a catch can with filter on top, then a drain line off bottom of cans into your sump.
    May as well just run a felpro head gasket or the likes.
    This blower has engine oil lines not itís own gearbox? If so tie the blower oil return into one of your catch can returns to sump.
    Thanks, that's the kind of useful info I was after regarding oil lines..

    Horribly ignorant question but if I'm pulling the heads off how much extra work is it to do the cam? And can anyone recommend a decent off the shelf blower cam?
    Sorry, my experience is limited to manifolds, pushrods and stumps etc..

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  7. #7
    Part of the furniture ajvx01's Avatar
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    Quote Originally Posted by immortality View Post
    Banana's manifold = intake air oven!

    Water/Meth works well enough and a much cleaner install than a front mount.
    Haha yes they really do get hot!
    Any advice regarding water/meth injection? I'd like to keep the whole system as simple and tidy as possible?

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  8. #8
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    I'm going to try a AEM kit on a little supercharged V6 shortly. The kit is fairly simple, a reservoir, pump, lines and nozzle and a controller with long loom. If I get it right you will only see the tank in the boot and a nozzle/line going into the intake.

  9. #9
    Part of the furniture ajvx01's Avatar
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    Quote Originally Posted by immortality View Post
    I'm going to try a AEM kit on a little supercharged V6 shortly. The kit is fairly simple, a reservoir, pump, lines and nozzle and a controller with long loom. If I get it right you will only see the tank in the boot and a nozzle/line going into the intake.
    That sounds perfect, what do they go for?

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  10. #10
    Part of the furniture ajvx01's Avatar
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    https://www.carmodsaustralia.com.au/...ction-kit.html

    Is this what your looking at?

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  11. #11
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    Yep, mine has a slightly different tank and it was a bit cheaper than that from a local supplier here in NZ (which I was really surprised about).

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    Water/meth works well at fixing heat soak and bandaiding detonation until it doesn’t work and you run The risk of engine damage. I’m setting it up on a mates whipple blown 304 but I’d much rather a constant intercooler, up to you which way you go.
    If you have the heads off you may as well pull front cover and do a cam, lifters springs probably rockers all depends on the $$ and what you want to do with it mate.
    Budget whipple 304 I’m doing for a mate, standard engine, 222/232-112 cam, drop in single valve springs, bolt on roller rockers, water meth injection straight into back of blower, but on e85 fuel so that’ll help a lot as well.

  13. #13
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    Quote Originally Posted by immortality View Post
    Yep, mine has a slightly different tank and it was a bit cheaper than that from a local supplier here in NZ (which I was really surprised about).
    When do you plan on installing it?
    And yeah that suprised me to given the nzd!

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  14. #14
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    Quote Originally Posted by tokes_Vhdrift View Post
    Water/meth works well at fixing heat soak and bandaiding detonation until it doesnít work and you run The risk of engine damage. Iím setting it up on a mates whipple blown 304 but Iíd much rather a constant intercooler, up to you which way you go.
    If you have the heads off you may as well pull front cover and do a cam, lifters springs probably rockers all depends on the $$ and what you want to do with it mate.
    Budget whipple 304 Iím doing for a mate, standard engine, 222/232-112 cam, drop in single valve springs, bolt on roller rockers, water meth injection straight into back of blower, but on e85 fuel so thatíll help a lot as well.
    I'd rather a cooler also because it's less wiring, parts that can break and fluid to top up but I'm concerned as I do not want the cooler to be visible at all, I haven't seen a hidden early Commodore intercooler yet..

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    Quote Originally Posted by tokes_Vhdrift View Post
    Water/meth works well at fixing heat soak and bandaiding detonation until it doesn’t work and you run The risk of engine damage. I’m setting it up on a mates whipple blown 304 but I’d much rather a constant intercooler, up to you which way you go.
    If you have the heads off you may as well pull front cover and do a cam, lifters springs probably rockers all depends on the $$ and what you want to do with it mate.
    Budget whipple 304 I’m doing for a mate, standard engine, 222/232-112 cam, drop in single valve springs, bolt on roller rockers, water meth injection straight into back of blower, but on e85 fuel so that’ll help a lot as well.
    It's strange, in Aussie water/meth is considered a band aid solution, in the US it's standard fare along with flex fuel and all the other regular mods.

    If i've got it right it I'll be able to tune to it and if it stops working the tune will automatically compensate. The tunes I'm using also have high and low octane maps and knock sensors so tuned right it should be fully safe. At the end of the day I'm no expert but there is no harm in trying.



    Quote Originally Posted by ajvx01 View Post
    When do you plan on installing it?
    And yeah that suprised me to given the nzd!

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    I'm just waiting on a different tank to arrive but it should be done in a couple of weeks all going well.
    Last edited by immortality; 26-08-2018 at 12:40 PM.

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