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Hi, can anybody tell me which way i should go with my rebuild. I have checked out other post about 202's and seen that blue crank and 12 port head is the way to go !! , but to day i was told i should just keep a standard red head on a red block as 12 port head would not make much diference , is this true !!! . i just want a motor that has resonable power and economy.
the blue motor i have is a 2.8 , will parts from this motor fit a red 202 !!.
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i know where you can get a fairly good head to suit if you like.
a mate did it and used it four a very short time, then stuffed up the bottom end and canned the idea.
it has roller rockers and the rocker posts have been pinney and it was completely redo |
BLWNHJ |
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quote:
Originally posted by blwnhj
i know where you can get a fairly good head to suit if you like.
a mate did it and used it
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The black head is the best it has the larger valves and better porting if you get one off a carby motor you have to block the air pump ports but that is easy just screw caps in.
the efi motor you don't have to. Otherwise the heads are the same. Would al
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BLWNHJ |
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I have run a red motor for years now and would argue that the performance difference is minimal... As with economy! I just did up a HP (179) for my UC and ill tell you now, there's nothing wrong with using a 9port head! If you change to 12port, you wil
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Also - you will need to drill holes in your block to suit the blue/black head.
For what you'd pay for a black head, you could spend it on working your red one to go even harder...
My car and i like to drink the same stuff... ALCOHOL! Shame i cant
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Stick with the red head, but make sure you get a mildly modified one, at least with the inlet posts removed. That is unless you wish to run EFI or twin choke carbies (eg triple Webers). However you will be best off using a blue/black crank and rods. These |
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If you go twelve port you can use a twelve port manifold and run triple webers off that. It is a fact New cast Yella tera twelve port heads flow better than any 9 port can. Still at a $1000 plus price tag you need to justify that. They come rady for unlea |
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Thnks for every bodys input, i already have go the 12 port head , picked it up real cheap. I no every body is saying 9port red head, but i still don't understand, if you have a 9 port head slightly modified , and you have a 12 port head with bigger ports
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well do the head up and see for yourself i reckon.
youve got it there may as well use it!!!!!
then you can come back on here and tell us if its better.
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BLWNHJ |
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The 12 port head is basiclly useless unless you wish to run a set of triples or EFI. Whatever you gain with the 12 port head, you will lose immediately with the crappy manifold. AFAIK you cannot buy an aftermarket manifold for a blue/black head. Plus thes |
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that sounds like alot of effort/$$$ for no gain, id not bother if these guys are right.
BLWNHJ |
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I think 12 port got a bit of a bad rap in the early days because they were attached to smog gear smothered blue motors too.
If you have the 12 port head, getting hardened valve seats is a must, as you would do with any cast hea these days.
Hey the o |
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Peter is right - if you are intending upon spending good $ an EFI black head is a good thing, but you will not get out of it cheap as you MUST fit hardened seats, whereas a red head will survive with a $75 upper cylinder lubricator kit (same thing as LPG |
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if you are interested I have a red motor head that has been ported and 12 port modified it has hardened seats o/s stainless valves closed combustion chambers double valve springs teflon valve stem seals was removed from my car as I needed lower compresion
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