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Thread: Getting my pinto plans together!!!

  1. #1
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    Getting my pinto plans together!!!

    Currently have a 2.0 pinto 205 block ported head standard valves, and a ph4 cam

    im wanting to take this out complete carbs ignition ect and store it away,

    i have a complete short 20 block and Iím going to strip it down and refresh it. And use this for the build.

    i have a set of twin 45ís and a gems? Big valve head and a ht1e can shaft,

    i know the cam needs a fair amount of compression to work correctly so Iíve been looking at forged rods and high compression pocketed pistons to get me to around 11.5:1 but will have to work it all out as I still might need the block skimming. As Iím aware standard pistons wonít take this.

    the cam shaft is ment to have a power band of 3000/7750rpm is the pinto crank up to this or will it be the week link?

    whats a realistic power out out for an engine of this spec? Sling as the head has a good port job.

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    Racer

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    Re: Getting my pinto plans together!!!

    Crank will be fine, make sure you dowel the flywheel. I run a Ht1e in a stage 4 head with 45.5mm inlets, Pec 136mm rods and short 92mm Wossner pistons, on 48's with 40mm chokes and a really good SRD manifold my engine makes just over 190hp, power doesn't really come on until about 3700 with an HT1e, you can make them behave ok at lower revs with some careful carb tuning, just dont expect to snap open the throttle at lower revs. I have around 12;1 compresion, decked block, machined to accept wire rings to reinforce the fire ring on the Reinz gasket.

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    Re: Getting my pinto plans together!!!

    as above, pinto crank will be fine, but you need to dowel the flywheel to it, power wise you should be over 180bhp

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    Spanner Monkey redhf's Avatar

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    Getting my pinto plans together!!!

    If it's a gems head check the porting or get a pic up. As they do sell part done heads, check the short turn on the inlets .is it std valves ??

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    Re: Getting my pinto plans together!!!

    I have seen the thread of graham’s regarding the porting these are the only pictures I have of it.

    It’s a big valve head 44.? Inlet I think




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    Re: Getting my pinto plans together!!!

    Quote Originally Posted by redhf View Post
    If it's a gems head check the porting or get a pic up. As they do sell part done heads, check the short turn on the inlets .is it std valves ??
    From what I know this was a spair head from gems for a engine they had build for a race car

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    Spanner Monkey redhf's Avatar

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    Getting my pinto plans together!!!

    Quote Originally Posted by Warrior View Post
    From what I know this was a spair head from gems for a engine they had build for a race car
    Graham on here is the man to talk to I gave him my gems head and he finished it off he made an airflow thread about it on here somewhere.

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    Re: Getting my pinto plans together!!!

    Quote Originally Posted by redhf View Post
    Graham on here is the man to talk to I gave him my gems head and he finished it off he made an airflow thread about it on here somewhere.
    Yeah I have seen that one

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    Re: Getting my pinto plans together!!!

    I 'll say once again what I have said before in another post In a Gems advert it says that their Big Valve heads are left un-ported for customers to finish off to their own requirements. Perhaps that's why the head in question was n't up to expectation or maybe someone else has had a go at it.

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    Re: Getting my pinto plans together!!!

    So they machine the valves and dont touch the ports? how much do they charge for a head given thats the easy part?

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    Re: Getting my pinto plans together!!!

    as has been said it may of been deliberate.

    the one i saw the ports and throats had been bored on a milling machine, but there was no hand blending or work to put a radius on the where the ports and throats met, so with both being bored bigger than standard there was a sharp square 90 degree corner to the short turn, which flowed less than a standard head. i get the point about part finished, but if so it would actually of been better not to touch the port at all.

    running a finger over the short turn will soon tell you if its one of those part finished heads

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    Re: Getting my pinto plans together!!!

    Quote Originally Posted by Erikmex View Post
    So they machine the valves and dont touch the ports? how much do they charge for a head given thats the easy part?
    Give them a ring, I am sure they'll discuss prices.

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    Re: Getting my pinto plans together!!!

    Quote Originally Posted by Graham View Post
    as has been said it may of been deliberate.

    the one i saw the ports and throats had been bored on a milling machine, but there was no hand blending or work to put a radius on the where the ports and throats met, so with both being bored bigger than standard there was a sharp square 90 degree corner to the short turn, which flowed less than a standard head. i get the point about part finished, but if so it would actually of been better not to touch the port at all.

    running a finger over the short turn will soon tell you if its one of those part finished heads
    Mine feels very rounded not sharp at all

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    Re: Getting my pinto plans together!!!

    post some photos of short turn so we be able to advise you if good or not cheers Mario.

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    Racer

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    Re: Getting my pinto plans together!!!

    I’m not that interested, just a query

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