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Thread: 308 to 333 stroker rebuild

  1. #1
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    Default 308 to 333 stroker rebuild

    I have a sapre 308 sitting in the garage that i pulled apart today.
    Alot of it seems to be unusable so i was thinking of putting a stroker crank in it nothing to serios just a lil 333, puting some better head on it (either vn or porting the standard heads) and replacing all the bearings and pistons.
    So does anyone know of a good place to get a 333 stoker crank on a budget?
    Can I reuse the conrods with a stroker?
    What is my best option with the heads?
    This motor will be built on a really tight budget and i dont want massive hp just a lil bit of squirt.
    P.S. It will be a gas motor

  2. #2
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    Pro-Stroke do a few stroker kits for the 308 (333, 360, 388).
    http://www.pro-stroke.com/

    Harrop do a stroker kit also to 383 for the 308 too.
    www.harrop.com.au/

    I dont think you will be able to do this on a very tight budget.

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    308/304 sig earson hlm320 adv 6deg, mild grind around the valve stems
    mill 5thou off block and heads everything ealse std
    $800 or less garenteed 400+bhp
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    Even in our sleep we happen to be right.
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    Quote Originally Posted by burnz View Post
    308/304 sig earson hlm320 adv 6deg, mild grind around the valve stems
    mill 5thou off block and heads everything ealse std
    $800 or less garenteed 400+bhp
    I have no idea what you sayed there but i like the sound off 800 or less and 400 hp
    Can you put it a bit more simply for me?

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    tigervh is offline SS.....smokin....!
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    He's talking about an after-market camshaft installed 6 degree's advanced, as for the mild grind around the valve stems, I'm not sure if he's refering to reducing the diametre of the valve stems where they protrude through the ports or actually enlarging the valve bowl of the port. 5 thou milled off both the heads and block will increase compression.

    Without looking at the specs of the cam, I would seriously doubt that you could get 400hp out of an otherwise standard 308, and if you did, the thing would be undrivable.

    As for your question about the 333 stroker, no you can't use the origonal rods, you will need to use modified 327 chev rods, with 350 chev or 5.7l ACL pistons. You probably already know that the crank is an offset ground 308 crank.

    Vn heads are the best way to go, but if moneys tight the older style heads can be easily cleaned up and do work quite well. If you're only going to use gas, you can go higher with your compression ratio, gas likes around 11:1.

    Just a bit of a tip: Get yourself a copy of the book; How to rebuild and hotrod Holden V8, by Max Ellery. The information in this book is invaluable. Its usually aviliable at Supercheap Auto. Another good book for modifying heads is; Modern Engine tuning by Graham Bell.

    Good luck.

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    Cheers for that i kinda figured he was talking about the cam.
    I'll have to get a copy of that book.
    Im starting to think the stock crank might b alot cheaper cause i dont need to change the conrods that way, Although i do need new pistons.
    Has anyone got any information about porting old school heads, Id love to give it a shot myself.
    And i can mill the head and block at work so thats easy and cheap too.
    Whats poeples thoughts on using the stock quady manifold and carb?
    Also with the heads sitting around 10 thou lower i spose i would need to mil that as well? I have an impco gas system and would kinda of like to stay with that for the moment and maybee later change the manifold and put 1 or 2 gas research throtle bodys on there.

  7. #7
    munckz Guest

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    I have a 4.9lt block stroked to a 333.
    & just got B cast heads, brock manifold and qudrajet carby. got dynoed 1 month ago @ 193.6rwkw. Got my engine rebuilt 1yr ago cost $4500 and that was just for the bottom end, haven't yet got around to doing the top end.
    It's a pretty expensive venture stroking and the bigger the stroke the more $$$$ you end up spending, but it's all worth it in the end..
    Goodluck

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    I noticed you said you'd mill the heads yourself, if you're gonna use the standard manifold and do this on a budget then mill out the centre restrictor under the darby so it looks open like an edelbrock troker manifold, alk to a head specialist about how far down to mill, as I'm not sure if you can remove the "floor that forms part of the dual plane section of the manifold. I have been told that you'll getbetter fuel distribution to each cylinder for an LPG application but talk to a head/engine builder to verify what Ive said, he'll set you straight on it if what Ive suggested isnt quite right.

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    dam sound like an expesive exersize to stroke it i'll look into the manifold milling though
    If i use the same crank and rods can i just buy new pistons bearings ect and bolt em in or does it all need to be sized and ballanced?
    The more i've looked into this the more i dont want to get caried away and spent all the money i dont have.
    How much can the standard rods take?
    Should I use standard pistons?
    I apreciate all your replyes ppl im a newby to v8's just want a nice tow car thats going to have a bit of poke and not spend a fortune building it

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    I would talk to someone like Pavtek or maybe COME and maybe get one of their tried and true combos that they sell, tell em what your trying to achieve and see what they say, a phone call costs ****all and you might save some money from the advice resulting from that call, thats what I would do if I had the cash to get another engine built... theres too many backyarders out there that will bullshit you and leave you with a botch build that will never go as hard as they claimed it would.

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