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Thread: VN heads

  1. #1
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    Default VN heads

    That other thread was going a pretty long way off topic, so I figure a thread just for ported to f*ck VN heads is probably in order.
    Coz I'm starting the thread I get to go first.

    Just finished these ones, 2.055 & 1.625" valves, 2.45" MCSA at the pinch, 2.7" CSA at the window, 89% throat.

    Flow:
    Intake
    Lift - flow - HP potential
    .1 - 63.5
    .2 - 137
    .3 - 192
    .4 - 228 - 469hp
    .5 - 261 - 537
    .6 - 285 - 586
    .65 - 294 - 604
    .7 - 298 - 613
    .75 - 302 - 621
    .8 - 307 - 631

    Pics:
















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    Do you ever leave? vidohq's Avatar
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    Give you $150 for them ...... Ha Ha .... Sorry couldn't help myself I give you permission to bend me over bend back your leg and kick me as hard as you want right in the clacka... Ha ha

  4. #4
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    what does a set of heads like that cost?

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    I know stuff all about the fine art of head porting, but geez it looks like some work has gone into them
    one question though (forgive my ignorance), but wouldn't that cutout above the inlet valve cause a hot spot ?
    Last edited by ynot8; 16-03-2012 at 07:22 PM.
    you can't put a price on FUN

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    Part of the furniture ajvx01's Avatar
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    That's some dam nice work....
    willing to do domestic/commercial electrical work for car parts/panel work.

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    Part of the furniture phtwgn's Avatar
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    Nice. Work TK !
    As above what would you charge for a set of heads like that ?

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    i've just finished a set myself- standard valve size though! you've left quiet alot of injecter slot remaining? nice work TK- i can appreciate how much time has gone into those!

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    Nice to see a bit off cross section instead of these peashooter ports people carry on about ...

    2.45" mCSA would be killer on a 355, with a big intake like a pro paw You couldnt run a crane 286 cam though

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    good stuff TK

    i like the idea of having a thread for particular cylinder heads, other people can add heads whenever they like,

    do alloy VN heads qualify as well?

    im doing a set of 300+CFM VT heads in the next week or so and some come alloys, i may even do a dash 3 thread as well i have done a few sets in the past few months for entirely different applications plus it would be good to see others add their heads as well.

  11. #11
    Love my v8's tonn/a355's Avatar
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    These threads r great but with all the technical stuff u all throwing in here it's pretty easy to get confused but very interesting thanks guys

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    Quote Originally Posted by paulzig View Post
    Nice to see a bit off cross section instead of these peashooter ports people carry on about ...

    2.45" mCSA would be killer on a 355, with a big intake like a pro paw You couldnt run a crane 286 cam though
    paul what MCSA would you call peashooter.

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    Do you ever leave? EH179's Avatar
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    Quote Originally Posted by paulzig View Post
    Nice to see a bit off cross section instead of these peashooter ports people carry on about ...

    2.45" mCSA would be killer on a 355, with a big intake like a pro paw You couldnt run a crane 286 cam though
    You've just upset about eleventy ten people with that 286 cam comment.

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    i've just finished a set myself- standard valve size though! you've left quiet alot of injecter slot remaining?
    Yeah, I prefer width over height - spreads the flow over the width of the turn better. I pretty much maxxed out the width of the turn & just used height to get to the cross section I wanted, testing I did on a junk head said the port would prefer width over height to remain stable at high lift/high depression.
    They were still going strong at .800" lift but I ran out of travel on the valve opening jig to go any higher - the way they were behaving methinks they would have gone out to .900" lift & still gained. Which will make them very stable at the higher depressions seen on a running engine - she'll carry well above peak power.

    Nice to see a bit off cross section instead of these peashooter ports people carry on about ...

    2.45" mCSA would be killer on a 355, with a big intake like a pro paw You couldnt run a crane 286 cam though
    If peashooter is the biggest that'll fit in a casting them you have to make do - cammed right a smaller port can work, dependant on application. But hey, VN's will go pretty big, so big ports & moderate cams give the best torque spread whilst keeping a strong top end.
    Pro-paw would be too big, this engine will get a ported harrop.
    TP really need to make a manifold between the little paw & the pro paw - harrop sized or just a little bigger. The harrop is not as good a design as the TP stuff, but it is closer to the right size for a stomper 355.
    May have to talk to Craig about that, the original TP single (called little paw now) doesn't cut it when aiming over 550hp. Back when it was designed guys building tuff 355's were shooting for 500hp, which it does very well with a strong torque curve, but 500hp is so 2009 now.
    You've just upset about eleventy ten people with that 286 cam comment.
    I've thrown out a bunch of them lately, the cam I use to check cam bearings is actually a 286. It's a f*cking hydraulic, too big to be a hydraulic, to hydraulic to be decent. IMO anything more than a baby hyd for a very mild daily type engine is a waste, pretty much everything I build runs a solid.

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    PS - Paul, cam is a 256/260 on 109 centres camtech solid FT.

    Cost for those that asked - I'm trying to avoid posting pricing these days, they cost what I needed to charge to cover the time spent & the parts whilst paying the bills & keeping food on the table. I charge less than some & more than others, I think my pricing is fair for the quality of the work - enough agree that I'm bullsh*t busy.

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