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Thread: Change head from 2.0 ltr Pinto to a 1.6 one

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    Change head from 2.0 ltr Pinto to a 1.6 one

    Hi fellows I am wanting to change to my 205 block Pinto 2.0 ltr engine head and put a 1.6 Pinto head. Is this a straightaway job ? Do I need to put a 2.0 or a 1.6 cam belt ?

    Kind advices will be very much thanked

    Eduardo

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Early 1600 belt needed...what are you doing with the valves...cheers mark

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by madragon199 View Post
    Early 1600 belt needed...what are you doing with the valves...cheers mark
    Thanks for the quick answer Mark. About the valves I will put the longer ones off the 1.6. By the way, as I am going to work the head, can I put the 45.5 mm IN and 39.1 mm EX like in the 2.0 head I have ?

    Cheers Mark and regards

    Eduardo

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    By the way Mark, this change of heads I'm planning to do is a wise one ? Let me have your advice about this matter too

    Thanks again Mark

    Cheers

    Eduardo

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Will be mega high compression, what are you doing to the bottom end and what cam are you going to run?

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by theduck View Post
    Will be mega high compression, what are you doing to the bottom end and what cam are you going to run?
    Well mates, it has a Piper 285 cam, forged pistons, 2 weber 45/45, and that's all. Its intender to be used at a maximum of 6 to 6.5 K RPM. I purchased this head long time ago and want to use it now cause the 2.0 ltr one is damaged. Also to have some more C/R. Is it too much ? maybe I can use a thicker gasket

    Tks for your kind advices

    Eduardo

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by theduck View Post
    Will be mega high compression, what are you doing to the bottom end and what cam are you going to run?
    Hi mate, may I have your advice about C/R ?

    Cheers

    Eduardo

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Assuming your forged Pistons would give 9:1 on a standard 2.0 head you'll get something like 11:1 with the 1.6 head.

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by theduck View Post
    Assuming your forged Pistons would give 9:1 on a standard 2.0 head you'll get something like 11:1 with the 1.6 head.
    Tks theduck for your kind answer. Is that too much ? What gasket thikness will I need to have a little less say 10.5 C/R ?

    Cheers and wait your kind reply

    Eduardo

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by Eduardo Benech View Post
    By the way Mark, this change of heads I'm planning to do is a wise one ? Let me have your advice about this matter too

    Thanks again Mark

    Cheers

    Eduardo
    Hi mate...yes i used 46mm inlet with 38 exhaust...it is a high compresion head...but you can reduce compresion when unshrouding the valves...i even had to have my head skimmed after unshrouding to get the compresion back up.......10.5:1 should be about spot on after unshrouding the valves...cheers mark...remember the valves are longer on the 1600 head...so if you are using valves from the 2.0 ..they will be short ....you could use valve lash caps...ive never used them ,seemed a bit of a bodge...i ended up finding some valves from the states the correct length..but the stem size was not the same...so i made my guides to suit...cheers mark

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by Eduardo Benech View Post
    By the way Mark, this change of heads I'm planning to do is a wise one ? Let me have your advice about this matter too

    Thanks again Mark

    Cheers

    Eduardo
    The reason i used a 1600 head was because i needed high compresion not achievable on the 2.0 head...but its a lot of work...if you are only looking at 10.5 :1 compresion then i see no advantage over the 2.0 head...cheers mark

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    the 1600 does have a better port angle/thicker short turn, but the difference isnt huge.

    rec do group1 valves in 1600 length which are a good move if you are going big valve

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by madragon199 View Post
    Early 1600 belt needed...what are you doing with the valves...cheers mark
    Surely the belt needed is the 2 litre version. he's changing the head, and not the block.

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by madragon199 View Post
    Hi mate...yes i used 46mm inlet with 38 exhaust...it is a high compresion head...but you can reduce compresion when unshrouding the valves...i even had to have my head skimmed after unshrouding to get the compresion back up.......10.5:1 should be about spot on after unshrouding the valves...cheers mark...remember the valves are longer on the 1600 head...so if you are using valves from the 2.0 ..they will be short ....you could use valve lash caps...ive never used them ,seemed a bit of a bodge...i ended up finding some valves from the states the correct length..but the stem size was not the same...so i made my guides to suit...cheers mark
    Hi Mark thanks again, but excuse me for my poor english, what means "unshrouding the valves" ?

    Please let me know about

    Cheers Eduardo

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by Graham View Post
    the 1600 does have a better port angle/thicker short turn, but the difference isnt huge.

    rec do group1 valves in 1600 length which are a good move if you are going big valve
    Thanks Graham for your answer, the C/R will come to be to high ?

    Let me know about

    Cheers

    Eduardo

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by Eduardo Benech View Post
    Hi Mark thanks again, but excuse me for my poor english, what means "unshrouding the valves" ?

    Please let me know about

    Cheers Eduardo
    its the area around the valves in the head"bowl" kind of like this drg...



    cheers mark

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by MemphisTwin View Post
    Surely the belt needed is the 2 litre version. he's changing the head, and not the block.
    You are dead correct...my bad...was thinking upside down...yiu will need the 2.0 belt ...

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    Re: Change head from 2.0 ltr Pinto to a 1.6 one

    Quote Originally Posted by madragon199 View Post
    its the area around the valves in the head"bowl" kind of like this drg...



    cheers mark
    Thanks very much Mark for your very clear explanation (thumb)

    Cheers

    Eduardo

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